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Literatura académica sobre el tema "Wet adhesive"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 16 de febrero de 2022

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Artículos de revistas sobre el tema "Wet adhesive"

PELTON, ROBERT, DONG YANG y EMIL GUSTAFSSON. "On increasing wet-web strength with adhesive polymers". February 2020 19, n.º 2 (1 de marzo de 2020): 63–67. http://dx.doi.org/10.32964/tj19.2.63.

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Fiber-fiber adhesion, called “bonding” in the old paper physics literature, is a critical component of the overall strength of dry paper. With freshly formed very wet pulp fiber webs, all evidence suggests there are no fiber-fiber crossings with significant adhesive joint strength. With water removal, a point will be reached where fiber-fiber adhesion starts to contribute to the overall wet-web strength. The literature reveals very few examples of polymers that increase fiber-fiber joint strength in freshly formed webs. Here, we summarize the literature and explain why it is so difficult to promote fiber-fiber wet adhesion with polymers. Nevertheless, ongoing research in areas as diverse as tissue engineering scaffolds and biomimetic adhe-sives gives clues to future developments. Advances in paper machine engineering have lessened the importance of wet-web strength. By contrast, a critical issue in many of the evolving nanocellulose technologies is the strength of objects first formed by aqueous processing, the green strength—the strength of wet bodies before drying. For exam-ple, 3-D printed nanocellulose objects and ultralow density cellulosic aerogels can be destroyed by capillary forces during drying. There is a need for adhesives that strengthen freshly formed, wet lignocellulosic joints.

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Bogue, Robert. "Recent innovations in adhesive technology". Assembly Automation 35, n.º 3 (3 de agosto de 2015): 201–5. http://dx.doi.org/10.1108/aa-10-2014-081.

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Purpose – This paper aims to provide an insight into recent innovations in adhesive technology by considering a selection of commercial developments and academic research activities. Design/methodology/approach – Following an introduction, this paper first discusses a selection of commercially developed adhesives used in the healthcare, photovoltaics and aerospace industries. It then considers biomimetic adhesive research, specifically dry adhesives which mimic the principles of gecko adhesion and wet adhesives based on the chemistry which underpins mussel adhesion. Finally, brief concluding comments are drawn. Findings – This shows that new adhesives continue to be developed to meet a growing range of industrial requirements, and a major research effort into biologically inspired adhesion mechanisms is poised to yield new families of high-performance adhesives. Originality/value – This provides details of recent commercial and academic developments in adhesive technology.

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Luo, Jing, Ying Zhou, Yi Zhang, Qiang Gao y Jianzhang Li. "An Eco-Effective Soybean Meal-Based Adhesive Enhanced with Diglycidyl Resorcinol Ether". Polymers 12, n.º 4 (20 de abril de 2020): 954. http://dx.doi.org/10.3390/polym12040954.

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Soybean meal-based adhesive is a good wood adhesive mainly due to its renewable, degradable, and environmentally friendly features. To improve the enhancement efficiency for adhesives, diglycidyl resorcinol ether (DRE) containing a benzene ring and flexible chain structure was used as an efficient cross-linker to enhance the adhesive in the study. The physicochemical properties of adhesives, the dry shear strength, and wet shear strength of plywood were measured. Results suggested that DRE reacted with the functional groups of soybean meal adhesive and formed a cross-linking network during hot press process in a ring-opening reaction through a covalent bond. As expected, compared to adhesive control, the soybean meal adhesive with 4 wt% DRE incorporation showed a significant increment in wet shear strength by 227.8% and in dry shear strength by 82.7%. In short, soybean meal adhesive enhanced with DRE showed considerable potential as a wood adhesive for industrial applications.

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Tam, Lik-ho y Denvid Lau. "Molecular simulation of adhesion property recovery in the cellulose/phenolic adhesive interface: the role of water molecules". MRS Proceedings 1793 (2015): 59–66. http://dx.doi.org/10.1557/opl.2015.826.

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ABSTRACTCellulose is one of the most abundant substances in the world, and the major constituent in the wood structure. Phenolic adhesive is largely used in the wood manufacture for gluing the wood panels together. The cellulose/phenolic adhesive interface is a representative of the interface between the wood panels and adhesives in the wood products. As the wood panels and adhesive are sensitive to environmental humidity, the interfacial adhesion of such interface when subjected to a humid environment can be a major factor in the durability of final products. Here, the role of water molecules on the adhesion property of cellulose/phenolic adhesive interface is investigated by molecular dynamics simulations. The simulation results reveal that the adhesion energy between cellulose and phenolic adhesive can be reduced by 86.5% with saturated moisture ingress. Meanwhile, it is demonstrated that the adhesion energy can be recovered after the interface experiences further dry conditioning. The hydrogen bonds between the cellulose and phenolic adhesive are found to account for the strong interfacial adhesion, which can be interrupted in the presence of water molecules and recovered after further dry conditioning. The adhesion property between the wood panels and adhesives is mainly determined by water molecules absorbed at the bilayer interface, which should be considered in a wet condition.

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Stark, Alyssa Y. y Christopher T. Mitchell. "Stick or Slip: Adhesive Performance of Geckos and Gecko-Inspired Synthetics in Wet Environments". Integrative and Comparative Biology 59, n.º 1 (27 de abril de 2019): 214–26. http://dx.doi.org/10.1093/icb/icz008.

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Abstract The gecko adhesive system has inspired hundreds of synthetic mimics principally focused on replicating the strong, reversible, and versatile properties of the natural system. For geckos native to the tropics, versatility includes the need to remain attached to substrates that become wet from high humidity and frequent rain. Paradoxically, van der Waals forces, the principal mechanism responsible for gecko adhesion, reduce to zero when two contacting surfaces separate even slightly by entrapped water layers. A series of laboratory studies show that instead of slipping, geckos maintain and even improve their adhesive performance in many wet conditions (i.e., on wet hydrophobic substrates, on humid substrates held at low temperatures). The mechanism for this is not fully clarified, and likely ranges in scale from the chemical and material properties of the gecko’s contact structures called setae (e.g., setae soften and change surface confirmation when exposed to water), to their locomotor biomechanics and decision-making behavior when encountering water on a substrate in their natural environment (e.g., some geckos tend to run faster and stop more frequently on misted substrates than dry). Current work has also focused on applying results from the natural system to gecko-inspired synthetic adhesives, improving their performance in wet conditions. Gecko-inspired synthetic adhesives have also provided a unique opportunity to test hypotheses about the natural system in semi-natural conditions replicated in the laboratory. Despite many detailed studies focused on the role of water and humidity on gecko and gecko-inspired synthetic adhesion, there remains several outstanding questions: (1) what, if any, role does capillary or capillary-like adhesion play on overall adhesive performance of geckos and gecko-inspired synthetics, (2) how do chemical and material changes at the surface and in the bulk of gecko setae and synthetic fibrils change when exposed to water, and what does this mean for adhesive performance, and (3) how much water do geckos encounter in their native environment, and what is their corresponding behavioral response? This review will detail what we know about gecko adhesion in wet environments, and outline the necessary next steps in biological and synthetic system investigations.

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So, Christopher R., Elizabeth Yates, Luis Estrella, Ashley Schenck, Catherine Yip y Kathryn J. Wahl. "Wet Adhesive Nanomaterials Inspired by the Barnacle Adhesive". Biophysical Journal 114, n.º 3 (febrero de 2018): 192a—193a. http://dx.doi.org/10.1016/j.bpj.2017.11.1075.

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Karpiesiuk, Jacek y Tadeusz Chyzy. "The effects of various parameters on the strengths of adhesives layer in a lightweight floor system". Open Engineering 10, n.º 1 (10 de junio de 2020): 443–53. http://dx.doi.org/10.1515/eng-2020-0057.

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AbstractThe article presents the results of shear and tensile strength of deformable cement adhesives, reinforced by fiberglass mesh with a different weight in a lightweight floor system without screeds. The substrate under adhesive was EPS and XPS thermal insulation. Tests were carried out in dry, wet conditions as well as during freezing and thawing. On their basis, it can be concluded that the larger contact surface of the EPS thermal insulation with the deformable adhesive C2S1 increases the adhesive’s tensile strength. This surface is not important using C2S2 adhesives or when the substrate is made from rough insulation XPS. It was generally found that the higher weight of the fibreglass mesh in deformable cement adhesives has a more favorable effect on their shear strength. Water absorption does not significantly affect the adhesion of terracotta, and in some configurations of components in this system increases it. The adhesive with the symbol C2S2 compared to C2S1 has a higher tensile and shear strength using the same materials. Frost conditions do not allow for long-term use of this type of floor construction in snow and ice protection systems. This experimental research shows that an economical solution with optimal strength consists of XPS insulation, 205 g/m2 mesh, C2S1 adhesive.

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Fan, Dong Bin, Te Fu Qin y Fu Xiang Chu. "A New Interior Plywood Adhesive Based on Oil -Tea Cake". Advanced Materials Research 194-196 (febrero de 2011): 2183–86. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2183.

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The oil-tea cake, as the major byproduct of tea oil production, was used with phenol-formaldehyde (PF) resin to prepare a mixed interior plywood panel adhesive (TC-PF adhesive). The optimum formulation of this adhesive and the optimum hot-press conditions for making plywood panels were investigated in this work. The results showed that wet shear strength value of TC-PF adhesives increased when the addition level of PF resin increased. TC-PF adhesive with 50% PF resin addition had a relatively low cost, and moreover pass the bonding strength requirement of China Industry Standard for interior plywood panels. Hot-press temperature and hot-press time had obvious influence on bonding performances of plywood panels. When the hot-press temperature was in the range of 140°C-160°C, the wet shear strength value of panels bonded with the adhesives passed the China Industry Standard requirement. At 3-5min of hot-press time, the plywood panels had satisfactory wet shear strength.

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Shirtcliffe, Neil J., Glen McHale y Michael I. Newton. "Wet Adhesion and Adhesive Locomotion of Snails on Anti-Adhesive Non-Wetting Surfaces". PLoS ONE 7, n.º 5 (31 de mayo de 2012): e36983. http://dx.doi.org/10.1371/journal.pone.0036983.

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Yi, Hoon, Sung Ho Lee, Minho Seong, Moon Kyu Kwak y Hoon Eui Jeong. "Bioinspired reversible hydrogel adhesives for wet and underwater surfaces". Journal of Materials Chemistry B 6, n.º 48 (2018): 8064–70. http://dx.doi.org/10.1039/c8tb02598c.

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Tesis sobre el tema "Wet adhesive"

Liu, Haijing. "Wet adhesion properties of oilseed proteins stimulated by chemical and physical interactions and bonding". Diss., Kansas State University, 2017. http://hdl.handle.net/2097/35774.

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Doctor of Philosophy
Department of Grain Science and Industry
X. Susan Sun
The ecological and public health liabilities related with consuming petroleum resources have inspired the development of sustainable and environmental friendly materials. Plant protein, as a byproduct of oil extraction, has been identified as an economical biomaterial source and has previously demonstrated excellent potential for commercial use. Due to the intrinsic structure, protein-based materials are vulnerable to water and present relatively low wet mechanical properties. The purpose of this study focuses on increasing protein surface hydrophobicity through chemical modifications in order to improve wet mechanical strength. However, most of the water sensitive groups (WSG), such as amine, carboxyl, and hydroxyl groups, are also attributed to adhesion. Therefore, the goal of this research is to reduce water sensitive groups to an optimum level that the modified soy protein presents good wet adhesion and wet mechanical strength. In this research, we proposed two major approaches to reduce WSG: 1). By grafting hydrophobic chemicals onto the WSGs on protein surface; 2). By interacting hydrophobic chemicals with the WSGs. For grafting, undecylenic acid (UA), a castor oil derivative with 11-carbon chain with a carboxyl group at one end and naturally hydrophobic, was used. Carboxyl groups from UA reacted with amine groups from protein and converted amines into ester with hydrophobic chains grafting on protein surface. The successful grafting of UA onto soy protein isolate (SPI) was proved by both Infrared spectroscopy (IR) and ninhydrin test. Wood adhesive made from UA modified soy protein had reached the highest wet strength of 3.30 ± 0.24 MPa with fiber pulled out, which was 65% improvement than control soy protein. Grafting fatty acid chain was verified to improve soy protein water resistance. For interaction approach, soy oil with three fatty acid chains was used to modify soy protein. Soy oil was first modified into waterborne polyurethanes (WPU) to improve its compatibility and reactivity with aqueous protein. The main forces between WPU and protein were hydrogen bonding, hydrophobic interactions, and physical entanglement. Our results showed that WPU not only increased protein surface hydrophobicity with its fatty acid chains but also enhanced the three-dimensional network structure in WPU-SPI adhesives. WPU modification had increased wet adhesion strength up to 3.81 ± 0.34 MPa with fiber pulled out compared with 2.01 ± 0.46 MPa of SPI. Based on IR and thermal behavior changes observed by DSC, it was inferred that a new crosslinking network formed between WPU and SPI. To exam if the UA and WPU technologies developed using soy protein are suitable for other plant proteins, we selected camelina protein because camelina oil has superior functional properties for jet fuels and polymers. Like soy protein, camelina protein is also highly water sensitive. However, simply applied UA and WPU to camelina protein following the same methods used for soy proteins, we did not obtain the same good adhesion results compared to what we achieved with soy protein. After protein structure analysis, we realized that camelina protein is more compact in structure compared to soy protein that made it weak in both dry and wet adhesion strength. Therefore, for camelina protein, we unfolded its compact structure with Polymericamine epichlorohydrine (PAE) first to improve flexible chains with more adhesion groups for future reaction with UA or WPU. PAE with charged groups interacted camelina protein through electrostatic interaction and promoted protein unfolding to increase reactivity within protein subunits and between protein and wood cells. Therefore, the wet adhesion strength of camelina protein was improved from zero to 1.30 ± 0.23 MPa, which met the industrial standard for plywood adhesives in terms of adhesion strength. Then the wet adhesion strength of camelina protein was further improved after applying UA and WPU into the PAE modified camelina protein. In addition, we also found PAE unfolding significantly improved the dry adhesion strength of camelina protein from 2.39 ± 0.52 to 5.39 ± 0.50 MPa with 100% wood failure on two-layer wood test. Camelina meal which is even more economical than camelina protein was studied as wood adhesive. Through a combination of PAE and laccase modification method, the wet adhesion strength of camelina meal was improved as high as 1.04 ± 0.19MPa, which also met industrial standards for plywood adhesives. The results of this study had proven successful modification of oilseed protein to increase water resistance and wet mechanical strength. We have gained in-depth understanding of the relationship between protein structure and wet adhesion strength. The successful modification of plant proteins meeting the industrial needs for bio-adhesives will promote the development of eco-friendly and sustainable materials.

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Manan, Nor Malina Binti. "Effect of ethanol wet-bonding of hydrophobic adhesive to dentin". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45588363.

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Li, Chao. "Adhesive Properties of Wet Polyelectrolyte Multilayer Films and Electrophoretic Deposition of Polyelectrolyte Complexes". University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1465470898.

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Stape, Thiago Henrique Scarabello 1984. "Influência do pré-tratamento dentinário com dimetilsulfóxido na resistência de união, exposição de matriz colágena e grau de conversão de sistemas adesivos = Influence of dimethyl sulfoxide-wet bonding technique on dentin bond strength, collagen exposure and monomer conversion of adhesive systems". [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289695.

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Orientador: Luis Roberto Marcondes Martins
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-27T11:02:43Z (GMT). No. of bitstreams: 1 Stape_ThiagoHenriqueScarabello_D.pdf: 2806642 bytes, checksum: ff8fdbed5d394599068a4bc1d64d36c2 (MD5) Previous issue date: 2015
Resumo: Essa tese avaliou um novo protocolo adesivo, que consiste no pré-tratamento dentinário com dimetilsulfóxido (DMSO) 50%, com o intuito de otimizar a durabilidade de interfaces adesivas produzidas pelos mecanismos de união convencional e autocondicionante envolvendo o substrato dentinário. Para isso, foram realizados dois estudos independentes para avaliar: (i) o efeito do uso do dimetilsufóxido (DMSO) na resistência de união imediata e na exposição de matriz colágena decorrente da hibridização dentinária na interface adesiva; e (ii) para avaliar o efeito do protocolo proposto na conversão monomérica na camada híbrida e na resistência de união após envelhecimento. Terceiros molares hígidos foram coletados e limpos, a face oclusal foi seccionada, expondo uma superfície dentinária de profundidade média, que foi saturada com uma solução aquosa de DMSO 50% (pH 8.2) após o condicionamento ácido para o sistema convencional de três passos (Adper Scothbond Multi-Purpose: 3M ESPE: SBMP) e previamente a aplicação do sistema autocondicionante de dois passos (Clearfil SE Bond: Kuraray; CF) no substrato mineralizado. Nos grupos controles, as amostras não foram tratadas com DMSO. Os segmentos restaurados com resina composta foram seccionados e submetidos ao ensaio de microtração após 24 h à 0,5 mm/min até a fratura (n=12) e no segundo estudo (n=10), após 1 ano e 2 anos. Foi realizada Two-way ANOVA para análise dos dados imediatos e no segundo estudo foi utilizada ANOVA medidas repetidas (proc mixed), ambos seguidos pelo Teste de Tukey (?=0.05). Foi realizado a análise histomorfométrica (n=12) para avaliação da extensão de matriz colágena exposta na interface adesiva por meio de microscopia ótica e coloração de Tricrômica de Masson após 24 h. Esses dados foram submetidos a Two-way ANOVA, seguido do Teste de Tukey (?=0.05). O grau de conversão monomérica (DC) na camada híbrida foi avaliado por espectroscopia micro-raman após 24 h (n=10), sendo submetidos a One-way ANOVA e Teste de Tukey (?=0.05). A interação entre protocolo adesivo e sistema adesivo influenciou significativamente a extensão de matriz colágena exposta (p<0,0001) e resistência de união imediata (p=0,0091). O protocolo adesivo com DMSO reduziu significativamente o grau de exposição de matriz colágena exposta (SBMP: 85,3% e CF: 61,5%), melhorando a qualidade da hibridização dentinária para ambos sistemas adesivos. Não houve influência negativa do DMSO na conversão monomérica do SBMP (p=0.892); já para o CF, houve aumento na conversão monomérica (p=0.033). O pré-tratamento com DMSO aumentou a resistência de união imediata do SBMP (p<0.0001). Considerando as amostras não tratadas, houve uma redução significativa (SBMP: 45,6% e CF: 36,8%) na resistência de união do SBMP (p<0.0001) e CF (p<0.0001) após dois anos de envelhecimento. Independentemente do tipo de adesivo, não houve diferença estatística na resistência de união entre valores imediatos e após 2 dois anos quando o DMSO foi empregado (p>0,05). A análise dos padrões de falha evidenciou uma tendência na redução no número de falhas adesivas após dois anos para as amostras tratadas com DMSO. Portanto, o protocolo adesivo proposto utilizando o DMSO é uma abordagem promissora para reduzir degradação da interface adesiva para os adesivos convencional e autocondicionante testados
Abstract: This work highlights a new bonding concept using 50% dimethyl sulfoxide (DMSO) as a dentin pre-treatment to optimize resin-dentin bonding for both etch-and rinse and self-etch adhesive systems after long-term aging. Two independent studies were performed: (i) to evaluate the effect of dimethyl sulfoxide wet-bonding technique on resin infiltration depths at the bonded interface and dentin bond strength; and (ii) to examine the effect of dentin pre-treatment with DMSO on the degree of conversion and dentin bond strength after long-term aging. Flat dentin surfaces derived from extracted sound human third molars were saturated with 50% DMSO (pH 8.2) after acid etching for a water-based etch-and-rinse adhesive system (Adper Scothbond Multi-Purpose: 3M ESPE; SBMP), and before acid primer application for a 10-MDP self-etch adhesive (Clearfil SE Bond: Kuraray; CF). In control groups, specimens were not treated with DMSO. The restored tooth segments were sectioned and submitted to microtensile bond strength test at 24 h (n=12), 1 year (n=10) and 2 years (n=10) at 0.5 mm/min until specimen fracture. One slab per tooth (n=12) was stained by Masson Trichrome and the extent of exposed collagen matrix at the bonded interface was evaluated using optical microscopy and a histomorphometric software at 24 h. Statistical analysis of the extension of collagen exposure was performed by two-way ANOVA followed by Tukey Test (?=0.05). The degree of conversion (DC) was measured inside the hybrid layer by micro-raman spectroscopy (n=10) at 24 h. DC statistical analysis was performed by One-way ANOVA and Tukey Test (?=0.05). Immediate microtesnile data was statistically analyzed Two-way ANOVA and aged data was analyzed by repeated measurres ANOVA (proc mixed). Post hoc multiple comparisons were performed by Tukey Test (?=0.05). The interaction between "dentin pre-treatment" and "adhesive system" significantly influence the extent of exposed collagen matrix (p<0.0001) and dentin bond strength (p=0.0091). The adhesive protocol with DMSO significantly reduced the extent of exposed collagen matrix (SBMP: 85.3% and CF: 61.5%), improving the quality of dentin hybridization for both adhesive systems. There was no negative influence of DMSO in monomer conversion for SBMP (p=0.892); nevertheless, there was an increase in monomer conversion (p=0.033) for CF. Dentin pretreatment with DMSO increased the immediate bond strength of SBMP (p<0.0001). Considering the untreated samples, there was a significant reduction (SBMP: 45.6% and CF: 36.8%) on the bond strength of SBMP (p<0.0001) and CF (p<0.0001) after two years of aging. Regardless of adhesive type, no significant reduction in bond strength at two years for DMSO-treated samples was observed. Fracture pattern analysis showed a tendency toward reduction in the number of adhesive failures when the DMSO-wet bonding was performed. Therefore, DMSO-wet bonding is a promising approach to reduce resin-dentin bond degradation of etch-and-rinse and self-etch adhesives
Doutorado
Dentística
Doutor em Clínica Odontológica

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Talungchit, Supitcha. "Enhancing resin-dentin bond effectiveness and durability: the role of ethanol-wet bonding technique, MMP-inhibition (chlorhexidine), and photoinitiator systems". Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/2996.

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Current hydrophilic resin adhesives undergo hydrolytic degradation and show a decrease in bond strength over time. Nanoleakage and ultrastructure studies suggest that inadequately infiltrated collagen leads to enzymatic degradation and resin-dentin bond failure. Adequate degree of conversion (DC) of resin adhesives is also critical to resin-dentin bond strength and durability. The long-term goal of this dissertation is the realization of durable resin-dentin bond. It is hypothesized that ethanol-wet bonding technique (EW) may effectively facilitate the infiltration of hydrophobic monomers into hydrophilic acid-etched dentin by maintaining interfibrillar spacing, stiffening collagen matrix, and improving adhesive resin-demineralized dentin matrix miscibility. Chlorhexidine (CHX), Matrix Metalloproteinase-inhibitor (MMP-inhibitor), should further preserve collagen integrity and resin-dentin bond strength. Moreover, efficient photoinitiator systems that broaden light absorptivity and provide more reactive radicals may enhance polymerization. In this dissertation, a clinically-relevant EW protocol, 3×15s absolute ethanol rinsing, provided significantly higher microtensile bond strength (πTBS) of a hydrophobic resin (70%BisGMA/30%TEGDMA) to dentin as compared to water-wet bonding (WW). All groups showed no significant drop of πTBS after 1-year storage except EW without CHX application, showing marginally significant reduction in πTBS (p=0.0558) suggesting MMP-inhibition by CHX in EW. These results were consistent with subsequent experiments. EW maintained interfibrillar width and hybrid layer thickness for resin infiltration and retention. Monomer molar concentration across the hybrid layer was significantly higher in EW than WW. An application of 2% CHX diacetate further preserved collagen banding in EW. WW showed more generalized spotted nanoleakage, while EW presented localized reticular nanoleakage. The use of Irgacure 819 (BAPO) alone and in combination with benzoyl peroxide (BPO) or camphorquinone (CQ) increased DC of hydrophobic and hydrophilic resins over resins containing the CQ/amine (4E) control. Only BAPO and BAPO/BPO demonstrated significantly higher immediate shear bond strength than CQ/4E. Within the limitations of these studies, EW improved resin-dentin bond durability by maintaining collagen interfibrillar spaces for efficient infiltration of a hydrophobic BisGMA/TEGDMA resin resulting in significantly higher πTBS and monomer molar concentrations with less nanoleakage distribution within the hybrid layer than WW. CHX further maintained collagen integrity and πTBS in EW. BAPO is a potential alternative photoinitiator of dental resins.

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Yuk, Hyunwoo. "Tough wet adhesion of hydrogel on various materials : mechanism and application". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104273.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 82-87).
In nature, robust interfacial adhesion plays crucial roles in maintaining integration and functionality of various physiological structures including tendon and cartilage to bones and epidermis to dermis in mammalian skins. For instance, the bonding of tendon and cartilage to bone is extremely tough (e.g., interfacial toughness ~800 Jm-2 ), yet such tough interfaces have not been achieved between synthetic hydrogels and various types engineering solids including rigid nonporous solids and elastomers. In this study, we report a strategy to design extremely robust interfacial bonding of synthetic hydrogeis containing 90 % water to various types of rigid engineering solids, precious metals and commonly-used elastomers. The design strategy is to anchor the long-chain polymer networks of tough hydrogels covalently to various solid surfaces, which can be achieved by diverse surface chemical treatments. We discuss the mechanism behind the proposed design strategy to further understand the tough wet adhesion of hydrogels in engineering and biological situations. We also demonstrate multiple novel applications of robust hydrogel-solid hybrids for both rigid engineering solids and elastomers. We discuss details of such new class of applications and their potential usefulness in diverse fields.
by Hyunwoo Yuk.
S.M.

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Smith, Tyler Lincoln. "Investigation of wet paper viscoelastic structural properties". Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10421.

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The thesis studies the relationship between inter-fiber forces present within a cellulose fiber web under varying external conditions. It particularly concentrates on the degree of fiber to fiber bonding and fiber entanglement as a function of moisture content. Finite element analysis of the fiber bonding is used in conjunction with the experimental results to analyze and explain the inter-fiber behaviors taking place within a sheet.

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Ankerfors, Caroline. "Polyelectrolyte complexes : Preparation, characterization, and use for control of wet and dry adhesion between surfaces". Doctoral thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-94138.

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This thesis examines polyelectrolyte complex (PEC) preparation, adsorption behaviour, and potential use for control of wet and dry adhesion between surfaces. PEC formation was studied using a jet-mixing method not previously used for mixing polyelectrolytes. The PECs were formed using various mixing times, and the results were compared with those for PECs formed using the conventional polyelectrolyte titration method. The results indicated that using the jet mixer allowed the size of the formed PECs to be controlled, which was not the case with the polyelectrolyte titration method, and a two-step mechanism for PEC formation was suggested. Adsorption experiments comparing two types of PECs, both produced from PAA and PAH, but with different molecular weights, demonstrated that surface-induced aggregation occurred in the high-molecular-weight PECs, whereas the adsorption stopped at a low level in the low-molecular-weight PECs. It was suggested that the latter PECs consisted of two fractions of complexes and that the fraction with lower polymer density exerted a site-blocking effect, hindering further adsorption. It was also demonstrated that particle-PECs (PPECs), in which one polyion was replaced with a silica nanoparticle, could be prepared. The purpose of preparing PPECs was to create a PEC structure that could create a joint with a special failure pattern referred to as disentanglement behaviour. Using the colloidal probe AFM technique, the expected disentanglement could be detected in PPECs, though the joint strength was low. Adhesion experiments demonstrated significantly higher pull-off values with polymer–polymer complexes than with PPECs. However, there was large spread in the data, possibly due to the surface inhomogeneity. Experiments using low-molecular-weight PECs as a paper strength agent demonstrated that PECs can indeed increase paper strength. Comparing the PEC results with those for polyelectrolyte multilayers (PEMs) prepared from the same polyelectrolytes indicated that, since the PEM strategy enables higher adsorption levels than does the PEC strategy, greater absolute strength improvements could be achieved using PEMs. However, PEC treatment resulted in the greatest effect per adsorbed amount of polymer.
Denna avhandling behandlar tillverkning av polyelektrolytkomplex (PEC), deras adsorption och potentiella användning för att öka adhesionen mellan ytor i vått och torrt. PEC bildades med hjälp av jetmixningsmetoden, en metod som inte tidigare använts för PEC‑tillverkning. Resultaten av tillverkningen jämfördes med resultat för PEC bildade genom den tidigare ofta använda polyelektrolyttitreringsmetoden. Jämförelsen visade att med jetmixningsmetoden kunde storleken på de bildade PECen styras med hjälp av blandningstiden, något som inte var möjligt med polyelektrolyttitreringsmetoden. Utifrån resultaten föreslås en två-stegsmekanism för PEC-bildandet. Adsorptionsexperiment med två typer av PEC, båda tillverkade av PAA och PAH fast med olika molekylvikter, visade att för högmolekylära PEC skedde en ytinducerad aggregation, medan adsorptionen stannade på en låg nivå för de lågmolekylära PECen. De senare PECen antogs bestå av två olika fraktioner, av vilka en fraktion med lägre polymerdensitet föreslogs ha en ytblockerande effekt, och därigenom hindrades vidare adsorption. Det visades också att partikel-PEC (PPEC), där ena polymerkomponenten bytts ut mot anjoniska nanopartiklar av kiseloxid, kunde tillverkas. Syftet var att skapa strukturer som kan åstadkomma ett brottmönster med uttrassling mellan ytor. Med hjälp av kolloidalprobs-AFM (atomkraftsmikroskopi) kunde det önskade uttrasslingsbeteendet påvisas, men fogstyrkan var låg. Adhesionsexperiment med polymer-polymer-PEC visade på högre styrkor än PPECen, men också stor spridning i data, troligen på grund av inhomogenitet i ytornas struktur. Experiment där lågmolekylära PEC använts som styrkekemikalie för papper visade att tillsats av PEC kan öka pappersstyrkan. Jämförelse med resultat för polyelektrolytmultilager (PEM) av samma komponenter visade att eftersom högre adsorptionsnivåer kan uppnås med PEM så kan större styrkeökningar erhållas med PEM. Däremot visades att den högsta styrkeökningen per adsorberad mängd polymer erhölls med PEC-behandlingen.
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Miller, Alexander T. "Direct Electroless Copper Plating on Glass Mediated by Solution-Phase Deposition of Nucleation and Adhesion Promoters". Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1436985990.

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Cai, Shaobiao. "3D numerical modeling of dry/wet contact mechanics for rough, multilayered elastic-plastic solid surfaces and effects of hydrophilicity/hydrophobicity during separation with applications". Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1205118488.

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Libros sobre el tema "Wet adhesive"

Pang, Changhyun, Chanseok Lee, Hoon Eui Jeong y Kahp-Yang Suh. Skin and dry adhesion. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199674923.003.0022.

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Close observation of various attachment systems in animal skins has revealed various exquisite multi-scale architectures for essential functions such as locomotion, crawling, mating, and protection from predators. Some of these adhesion systems of geckos and beetles have unique structural features (e.g. high-aspect ratio, tilted angle, and hierarchical nanostructure), resulting in mechanical interlocking mediated by van der Waals forces or liquid secretion (capillary force). In this chapter, we present an overview of recent advances in bio-inspired, artificial dry adhesives, and biomimetics in the context of nanofabrication and material properties. In addition, relevant bio-inspired structural materials, devices (clean transportation device, interlocker, biomedical skin patch, and flexible strain-gauge sensor) and microrobots are briefly introduced, which would shed light on future smart, directional, and reversible adhesion systems.

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(Editor), Timothy A. Springer, Donald C. Anderson (Editor), Alan S. Rosenthal (Editor) y Robert Rothlein (Editor), eds. Leukocyte Adhesion Molecules: Proceedings of the First International Conference on: "Structure, Function and Regulation of Molecules Involved in Leukocyte ... West Germany, September 28 - October 2, 1988. Springer, 1989.

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Poppinga, Simon, Ulrike Bauer, Thomas Speck y Alexander G. Volkov. Motile traps. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0014.

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We review the biomechanics, functional morphology, and physiology of motile traps. The movements of snap traps in Aldrovanda and Dionaea, motile adhesive traps in Drosera and Pinguicula, and suction traps in Utricularia are driven by active water displacement processes leading to reversible turgor changes of motor cells, irreversible growth, or mechanical pre-stressing of tissues. In some cases, the motion is amplified by the release of elastic energy stored in these tissues. The only known case of a passive motile trapping movement is the ‘springboard’ trapping mechanism of Nepenthes gracilis, in which a rapid vibration of the pitcher lid is actuated by the impact force of raindrops. Open research questions are summarized and future studies are suggested.

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The World Market for Narrow Fabrics Consisting of Warp without Weft Assembled by Means of an Adhesive: A 2004 Global Trade Perspective. Icon Group International, Inc., 2005.

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Parker, Philip M. The World Market for Narrow Fabrics Consisting of Warp without Weft Assembled by Means of an Adhesive: A 2007 Global Trade Perspective. ICON Group International, Inc., 2006.

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The World Market for Narrow Woven Fabrics and Narrow Fabrics Consisting of Warp without Weft Assembled by Means of an Adhesive: A 2004 Global Trade Perspective. Icon Group International, Inc., 2005.

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Parker, Philip M. The World Market for Narrow Woven Fabrics and Narrow Fabrics Consisting of Warp without Weft Assembled by Means of an Adhesive: A 2007 Global Trade Perspective. ICON Group International, Inc., 2006.

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Leukocyte Adhesion Molecules : Proceedings of the First International Conference on: "Structure, Function and Regulation of Molecules Involved in ... West Germany, September 28 - October 2, 1988. Springer, 2011.

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Ductigami: The Art of the Tape. Boston Mills Press, 2006.

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Barros, Rodrigo José Saraiva de, Tereza Cristina de Brito Azevedo, Carla de Castro Sant’Anna, Marianne Rodrigues Fernandes, Leticia Martins Lamarão y Rommel Mario Rodríguez Burbano. Grupos sanguíneos e anticorpos anti-eritrocitários de importância transfusional. Brazil Publishing, 2020. http://dx.doi.org/10.31012/978-65-5861-112-7.

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Immunohematology is an area dedicated to the study of the interactions of the immune system and blood cells in transfusion practice. Blood transfusion is a therapeutic technique that has been widely used since the 17th century. The transfusion medicine aims to repair the pathological needs of blood components in the living organism, be it red blood cells, plasma, platelets, clotting factors, among others. Despite being a therapeutic means, transfusion of blood components can be considered at risk because it is a biological material and due to the transfusion immunological reactions that can be caused during or after the moment of transfusion. In the surface structure of red blood cells, numerous molecules of a protein, glycoprotein or glycolipid nature are found, which are also called membrane antigens that make up structures and perform transport functions, as receptors, as adhesion, enzymatic and / or complement regulatory molecules. The formation of these antigens occurs by an approximate amount of 39 genes involved in their production, of which 282 different antigens are organized in more than 30 blood group systems. This antigenic diversity is a major cause of the formation of irregular anti-erythrocyte antibodies. Therefore, with the increase in blood transfusions in surgeries, transplants and clinical treatment of cancer and other chronic diseases, a significant increase in the occurrence of alloimmunizations in polytransfused patients began to be observed. Such biological phenomena motivated us to carry out this study and the antigenic diversity motivated us to elaborate this small compendium where we also describe the main blood groups.

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Capítulos de libros sobre el tema "Wet adhesive"

Lau, K. H. Aaron y Phillip B. Messersmith. "Wet Performance of Biomimetic Fibrillar Adhesives". En Biological Adhesive Systems, 285–94. Vienna: Springer Vienna, 2010. http://dx.doi.org/10.1007/978-3-7091-0286-2_19.

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Eliades, T., G. Eliades, N. Silikas y D. C. Watts. "Orthodontic Bonding to Wet Enamel with Water-Insensitive and Water-Activated Orthodontic Adhesive Resins". En Dental Hard Tissues and Bonding, 71–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-28559-8_4.

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Gooch, Jan W. "Wet Adhesion Test". En Encyclopedic Dictionary of Polymers, 809. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12787.

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Malinowski, Paweł H., Tomasz Wandowski, Wiesław M. Ostachowicz, Maxime Sagnard, Laurent Berthe, Romain Ecault, Igor Solodov, Damien Segur y Marc Kreutzbruck. "Extended Non-destructive Testing for the Bondline Quality Assessment of Aircraft Composite Structures". En Adhesive Bonding of Aircraft Composite Structures, 223–57. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_4.

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AbstractWe present the results of extended non-destructive testing (ENDT) methods for bond line quality assessment in adhesive joints. The results presented were derived for important application scenarios with regards to aircraft manufacturing and the in-service repair of composite structures. The electromechanical impedance (EMI), laser shock adhesion testing (LASAT), and nonlinear ultrasound scanning (NUS) were used on flat coupon samples, scarfed samples, and curved samples. The EMI method applied to the flat coupons showed some relation of the frequency shift to the level of contamination. For the curved samples, there was insufficient sensitivity to differentiate distinct levels of contamination, while for scarfed samples in most cases both detection and distinction were possible. The LASAT method gave good results for the coupon samples, which were also in accordance with the results of the $${\text{G}}_{\text{IC}}$$ G IC and $${\text{G}}_{\text{IIC}}$$ G IIC tests. For coupon samples with multiple contaminations, we obtained results with varying significance. In the case of NUS, the measurements revealed an increase in nonlinearity affected by contamination at the interphase between the CFRP adherend and the adhesive layer for the majority of scenarios comprising single contamination of flat coupons and scarfed samples. The effect of multiple contaminations was a decrease in nonlinearity for the curved samples.

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Mann, Richard P., Avinash P. Nayak, M. Saif Islam, V. J. Logeeswaran, Edward Bormashenko, Kerry Allan Wilson y Frank Vollmer. "Wet Adhesion in Tree Frogs". En Encyclopedia of Nanotechnology, 2828. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100887.

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Aliano, Antonio, Giancarlo Cicero, Hossein Nili, Nicolas G. Green, Pablo García-Sánchez, Antonio Ramos, Andreas Lenshof et al. "Adhesion in Wet Environments: Frogs". En Encyclopedia of Nanotechnology, 70–83. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_257.

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Harvey, W. J. y A. E. Vardy. "Bonded Web Stiffeners for Steel Bridges". En Adhesion 14, 1–14. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0759-1_1.

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Endlein, Thomas y W. Jon P. Barnes. "Wet Adhesion in Tree and Torrent Frogs". En Encyclopedia of Nanotechnology, 1–20. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6178-0_257-2.

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Endlein, Thomas y W. Jon P. Barnes. "Wet Adhesion in Tree and Torrent Frogs". En Encyclopedia of Nanotechnology, 4355–73. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-9780-1_257.

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Funke, W. "Improvement of Wet Adhesion of Organic Coatings by Thin Adhesion Layer". En Surface Phenomena and Latexes in Waterborne Coatings and Printing Technology, 115–22. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-2395-3_9.

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Actas de conferencias sobre el tema "Wet adhesive"

Ohta, Kohei, Atsushi Hirate, Yuto Miyachi, Tomohiro Shimizu y Shoso Shingubara. "All-wet TSV filling with highly adhesive displacement plated Cu seed layer". En 2015 International 3D Systems Integration Conference (3DIC). IEEE, 2015. http://dx.doi.org/10.1109/3dic.2015.7334609.

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Williams, Kenneth, Jens Plinke y Wei Chen. "ASSESSMENT TECHNIQUES FOR MEASURING TENSILE ADHESIVE FORCES OF WET AND STICKY ORES". En 46º Seminário de Redução/ 17º Minério de Ferro/ 4º Aglomeração. São Paulo: Editora Blucher, 2016. http://dx.doi.org/10.5151/2594-357x-27672.

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Patil, Vikram y Chad B. O'Neal. "Adhesive Strength Characterization of CYTOP™: Low Temperature Wafer-Level Packaging". En ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14791.

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This study describes a wafer bonding technique using CYTOP™ inking method for the high volume packaging of micro-electro mechanical system (MEMS) devices. CYTOP™ is a class of perfluoro (alkenyl vinyl ether) polymer which is obtained by cyclopolymerization of perfluoro. The CYTOP™ adhesive bonding requires much lower temperature (150 to 200° C) compared to other bonding techniques such as soldering (> 250° C) or anodic (~350° C) bonding. The lower temperatures involved in the process reduce the risk of thermal damage to temperature sensitive devices during packaging. The described bonding process consists of a wet inking technique in which wet CYTOP™ ink is applied on soft cured CYTOP™ before bonding. In this study, CYTOP™ is characterized for its bonding strength and quality. The experiments are performed on silicon and glass wafer substrates. The bonded samples are pull-tested and tensile stress values are recorded at the instance of bond failure. About 90% of the samples failed at the bonding interface which indicates that the recorded stress values are the bond strength of CYTOP™. The bond strength of CYTOP™ depends upon the curing temperature and the curing time. The highest bond strength of 16. 46 MPa is recorded at 200° C and 45 min. of curing. The CYTOP™ bond strength at 200° C is comparable with bond strength of BCB at 250° C.

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Friedrich, Jorg y Renate Mix. "Improvement of the Adhesive Bond Strength between Metals and Polymers by Plasmachemical and Wet-chemical Pretreatments". En 2006 1st Electronic Systemintegration Technology Conference. IEEE, 2006. http://dx.doi.org/10.1109/estc.2006.280106.

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Seok, Seonho, Nathalie Rolland y Paul-Alain Rolland. "A Novel Zero-Level Packaging using BCB Adhesive Bonding and Glass Wet-Etching for Millimeter-Wave Applications". En TRANSDUCERS '07 & Eurosensors XXI. 2007 14th International Conference on Solid-State Sensors, Actuators and Microsystems. IEEE, 2007. http://dx.doi.org/10.1109/sensor.2007.4300579.

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Gong, Ling, Haiwu Yue, Xuan Wu y Xiaojie Wang. "Observation of micro-topography of newt toe pads and investigating on wet adhesive properties of microstructured surface of PDMS". En Bioinspiration, Biomimetics, and Bioreplication VIII, editado por Akhlesh Lakhtakia. SPIE, 2018. http://dx.doi.org/10.1117/12.2293469.

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Kennedy, C. E., K. Terwilliger y G. J. Jorgensen. "Analysis of Accelerated Exposure Testing of Thin-Glass Mirror Matrix". En ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76040.

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Concentrating solar power (CSP) companies have deployed thin-glass mirrors produced by wet silver processes on ∼1-mm-thick, relatively lightweight glass. These mirrors have been bonded to metal substrates in commercial installations. Initial hemispherical reflectance is ∼93% to 96%, and the cost is ∼$16.1/m2 to $43.0/m2. These mirrors have the confidence of the CSP industry. However, corrosion was observed in mirror elements of operational solar systems deployed outdoors for 2 years. NREL’s advanced optical materials team was assigned to investigate the problem. First, it was noted that this corrosion is very similar to the corrosion bands and spots observed on small (45 mm × 67 mm) thin-glass mirrors laminated to metal substrates with several different types of adhesives and subjected to accelerated exposure testing (AET) at NREL. These samples exhibited corrosion at the unprotected edges and along cracks, and the choice of adhesive affected the performance of weathered thin-glass mirrors. Secondly, two significant changes in mirror manufacture have occurred in the wet-chemistry process because of environmental concerns. The first is the method of forming a copper-free reflective mirror, and the second is the use of lead-free paints. A test matrix of 84 combinations of sample constructions (mirror type / back protective paint / adhesive / substrate) was devised for AET as a designed experiment to identify the most promising mirrors, paints, and adhesives for use with concentrator designs. Two types of accelerated exposure were used: an Atlas Ci5000 WeatherOmeter (WOM) and a damp-heat chamber. Based on an analysis of variance (ANOVA), the various factors and interactions were modeled. These samples now have almost 24 months of accelerated exposure. Analysis of the thin-glass mirror matrix indicated that the Glaverbel mirror with a copperless formulation demonstrates slightly better performance compared to the Naugatuck standard copper-containing mirror and new copperless constructions although most results are within experimental uncertainty. Analysis of the thin-glass mirror matrix indicates commercial (non-mirror) back-protective paint applied after mirror manufacturing is not beneficial. Degradation of the samples exposed to date in the damp-heat chamber is similar, but at a rate 10 times faster than observed for samples in the WOM. We will discuss the results of the continued exposure testing of these mirror samples. Although glass mirrors with copper back-layers and heavily leaded paints have been considered robust for outdoor use, the new copperless back-layer and lead-free paint systems were designed for interior mirror applications and the outdoor durability must be determined.

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Pyo, Seong-Soo, Seung-Bok Lee, Tak-Hyoung Lim, Rak-Hyun Song, Sang-Hoon Hyun y Dong-Ryul Shin. "Effect of Conducting Oxide Coatings on Crofer22APU Used as Metallic Interconnects for Solid Oxide Fuel Cells". En ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85209.

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The conductive ceramic coating was used to improve an electrical performance of substrate steel, as well as to prevent the contamination of the chromium ion in SOFC. The (La0.8Sr0.2)0.98MnO3(LSM) conductive material was coated on Crofer22APU via a wet spray coating process. The adhesive strength of an interface between coated layer and metal substrate increased with the surface roughness of metallic interconnects. After the oxidation experiments of coated substrate during 8000 hours, the ASR showed a low value of 23 mΩ·cm2. These results shown that the coated oxides layer prevents the formation and the growth of scale (Cr2O3 and (Mn, Cr, Fe)3O4 layer) and enhance the long-term stability and electrical performance of metallic interconnect for SOFC.

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Kennedy, C. E., K. Terwilliger y G. J. Jorgensen. "Furthur Analysis of Accelerated Exposure Testing of Thin-Glass Mirror Matrix". En ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36182.

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Concentrating solar power (CSP) companies have deployed thin-glass mirrors produced by wet-silver processes on ∼1-mm-thick, relatively lightweight glass. These mirrors are bonded to metal substrates in commercial installations and have the confidence of the CSP industry. Initial hemispherical reflectance is ∼93%–96%, and the cost is ∼$16.1/m2–$43.0/m2. However, corrosion was observed in mirror elements of operational solar systems deployed outdoors for 2 years. National Renewable Energy Laboratory (NREL) Advanced Materials Team has been investigating this problem. First, it was noted that this corrosion is very similar to the corrosion bands and spots observed on small (45 mm × 67 mm) thin-glass mirrors laminated to metal substrates with several different types of adhesives and subjected to accelerated exposure testing (AET) at NREL. The corrosion appears as dark splotches in the center of the mirror, with a corresponding 5%–20% loss in reflectivity. Secondly, two significant changes in mirror manufacture have occurred in the wet-chemistry process because of environmental concerns. The first is the method of forming a copper-free reflective mirror, and the second is the use of lead-free paints. However, the copper-free process requires stringent quality control and the lead-free paints were developed for interior applications. A test matrix of 84 combinations of sample constructions (mirror type/back-protective paint/adhesive/substrate) was devised for AET as a designed experiment to identify the most-promising mirrors, paints, and adhesives for use with concentrator designs. Two types of accelerated exposure were used: an Atlas Ci5000 WeatherOmeter (CI5000) and a BlueM damp-heat chamber. Based on an analysis of variance (ANOVA), the various factors and interactions were modeled. These samples now have more than 36 months of accelerated exposure, and most samples have completed their test cycle. We will discuss the results of the final exposure testing of these mirror samples. Glass mirrors with copper back-layers and heavily leaded paints have been considered robust for outdoor use. However, the basic mirror composition of the new mirrors is radically different from that of historically durable solar mirrors, and the outdoor durability must be determined.

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Seaman, Calvin H., David V. Brower, Suy Q. Le y Henry H. Tang. "Development and Testing of a Post-Installable Deepwater Monitoring System Using Fiber-Optic Sensors". En ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41305.

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This paper addresses the design and development of a fiber-optic monitoring system that can be deployed on existing deep water risers and flow lines; and provides a summary of test article fabrication and the subsequent laboratory testing performed at the National Aeronautics and Space Administration-Johnson Space Center (NASA-JSC). A major challenge of a post-installed instrumentation system is to ensure adequate coupling between the instruments and the riser or flow line of interest. This work investigates the sensor coupling for pipelines that are suspended in a water column (from topside platform to seabed) using a fiber-optic sensor clamp and subsea bonding adhesive. The study involved the design, fabrication, and test of several prototype clamps that contained fiber-optic sensors. A mold was produced by NASA using 3-D printing methods that allowed the casting of polyurethane clamp test articles to accommodate 4-inch and 8-inch diameter pipes. The prototype clamps were installed with a subsea adhesive in a “wet” environment and then tested in the NASA Structures Test Laboratory (STL). The tension, compression, and bending test data showed that the prototype sensor clamps achieved good structural coupling, and could provide high quality strain measurement for active monitoring.

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Informes sobre el tema "Wet adhesive"

Chen, Chen, Peng Chen, Xia Liu y Hua Li. Combined 5-Fluorouracil and Low Molecular Weight Heparin for the Prevention of Postoperative Proliferative Vitreoretinopathy in Patients with Retinal Detachment. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, agosto de 2021. http://dx.doi.org/10.37766/inplasy2021.8.0117.

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Review question / Objective: The aim of this meta-analysis is to evaluate the efficacy and safety of intraoperative infusion of combined 5-fluorouracil and low molecular weight heparin (LMWH) for the prevention of postoperative proliferative vitreoretinopathy in patients with retinal detachment. Condition being studied: Postoperative proliferative vitreoretinopathy (PVR) is the primary cause of failure of retinal reattachment surgery. 5-fluorouracil (5-FU) inhibits the proliferation of fibroblasts, and suppresses collagen contraction. On the other hand, heparin reduces fibrin exudation, and inhibits the adhesion and migration of retinal pigment epithelial cells. We conduct this comprehensive literature search and meta-analysis to address whether intraoperative infusion of combined 5-FU and LWMH improves the primary success rate of pars plana vitrectomy, as well as reduces postoperative PVR. Our study aims to provide clinical evidence for retinal surgeons concerning their choice of intraoperative medication.

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