Bibliografias temáticas / Nano-additives

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Literatura científica selecionada sobre o tema "Nano-additives"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 10 de março de 2023

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Artigos de revistas sobre o assunto "Nano-additives"

Bhat, Faheem Sadiq, e Mohammad Shafi Mir. "Study Investigating the Influence of Warm-Mix Asphalt Additives on Rutting and Fatigue Performance of Nano-Modified Asphalt Binders". Transportation Research Record: Journal of the Transportation Research Board 2676, n.º 4 (6 de janeiro de 2022): 719–31. http://dx.doi.org/10.1177/03611981211064995.

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The current study investigates the synergized effect of a nanomaterial and two warm mix additives asphalt (WMA) additives on different properties of asphalt binders. The study used an optimal percentage of 2% for nano-Al2O3; two WMA additives were used in different concentrations. The results revealed that the addition of WMA additives increased the softening point of nano-Al2O3 modified asphalt binder. Penetration and ductility results showed a decrease after the introduction of WMA additives. The viscosity of nano-Al2O3 modified asphalt binders showed a reduction after the introduction of WMA additives. Rutting evaluation was done by using the superpave rutting parameter and multiple stress creep and recovery (MSCR) test. The fatigue performance of the asphalt binders was measured using the superpave fatigue parameter and linear amplitude sweep (LAS) test. Results showed that the introduction of WMA additives improved the rutting and fatigue performance of nano-Al2O3 modified asphalt binders. The introduction of WMA additives enhanced the aging performance of the nano-Al2O3 modified asphalt binders.

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Zhao, Yan Hui, Xi Liang Dai e Jia Xi Zhang. "Research on Properties of Automobile Lubricant Containing Nano-Ceramic Additives". Advanced Materials Research 503-504 (abril de 2012): 700–704. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.700.

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This paper makes road test on two kinds of engine lubricant, one contains nano-ceramic additives, and one does not. Results show that the lubricant containing nano-ceramic additives can fully meet the requirements of automotive engine, and nano-ceramic lubricant is superior in anti-wear properties to other lubricant in experiment, and nano-ceramic additives can improve the anti-wear properties of lubricant.

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Liu, Yue, Chuan Zhen Huang, Han Lian Liu, Bin Zou, Peng Yao e Liang Xu. "Effect of Nano-Additives on Microstructure and Mechanical Properties of Ti(C,N)-TiB₂-WC Composite Ceramic Cutting Tool Materials". Key Engineering Materials 589-590 (outubro de 2013): 337–41. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.337.

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Ti(C,N)-TiB2-WC composite ceramic cutting tool materials with nano-scale additives Ni and Mo, and micro-scale additives Ni and Mo as sintering aids were sintered respectively at a temperature of 1550 °C for holding time of 1hour in vacuum by a hot-press technique. The effects of nano-scale additives Ni and Mo, and micro-scale additives Ni and Mo on microstructure and mechanical properties of composites were compared and investigated. It is concluded that the wettability of nano-scale Ni and Mo to the composites is better than that of micro-scale Ni and Mo. The nano-scale whiskers were found in the composite ceramic tool materials with nano-scale additives. The addition of nano-scale Ni and Mo instead of micro-scale Ni and Mo could make the ﬂexural strength and fracture toughness of Ti(C, N)-TiB2 –WC composites have a promotion, but could not make the hardness of the composites increase in this study.

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Shi, Shih-Chen, e Xiao-Ning Tsai. "Cellulose derivative as protection coating: Effect of nanoparticle additives on load capacity". Teknomekanik 5, n.º 2 (15 de dezembro de 2022): 90–96. http://dx.doi.org/10.24036/teknomekanik.v5i2.16372.

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The cellulose derivative hydroxypropyl methylcellulose (HPMC) has recently been extensively studied and used in mechanical applications. However, the softness and susceptibility to deformation of HPMC limited its further applications. In this study, metal nanoparticles (nano-aluminum and nano-copper) and nano-metal oxide particles (nano-alumina and nano-copper oxide) were used as additives to HPMC to form a composite film with improved mechanical properties, particularly load capacity. The addition of high levels of additives provided a higher load capacity. Among the nano-additives used in the study, Cu (2 wt.%) provided the composite with the highest load capacity, improving the load capacity of pure HPMC by 250%. The surface treatment of strengthening additives is an important step. Adding specific high-strength and high-modulus metal and metal oxide additives to the soft HPMC matrix can effectively improve the load-bearing capacity of the composite material. This study proposes a simple evaluation method for the load-bearing capability of the coating as well.

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Mirzababaei, Mehdi, Jafar Karimiazar, Ebrahim Sharifi Teshnizi, Reza Arjmandzadeh e Sayed Hessam Bahmani. "Effect of Nano-Additives on the Strength and Durability Characteristics of Marl". Minerals 11, n.º 10 (12 de outubro de 2021): 1119. http://dx.doi.org/10.3390/min11101119.

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Low bearing capacity soils may pose serious construction concerns such as reduced bearing capacity and excessive hydro-associated volume changes. Proper soil remediation techniques must be planned and implemented before commencing any construction on low bearing capacity soils. Environmentally friendly soil stabilizers are gradually replacing traditional soil stabilizers with high carbon dioxide emissions such as lime and cement. This study investigated the use of an alternative pozzolanic mix of nano-additives (i.e., nano-silica and nano-alumina) and cement to reduce the usage of cement for achieving competent soil stabilization outcomes. A series of unconfined compressive strength (UCS), direct shear, and durability tests were conducted on marl specimens cured for 1, 7, and 28 days stabilized with nano-additives (0.1~1.5%), 3% cement, and combined 3% cement and nano-additives. The UCS and shear strength of stabilized marl increased with nano-additives up to a threshold nano-additive content of 1% which was further intensified with curing time. Nano-additive treated cemented marl specimens showed long durability under the water, while the cemented marl decomposed early. The microfabric inspection of stabilized marl specimens showed significant growth of calcium silicate hydrate (CSH) products within the micro fabric of nano-silica treated marl with reduced pore-spaces within aggregated particles. The results confirmed that nano-additives can replace cement partially to achieve multi-fold improvement in the strength characteristics of the marl.

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Gavhane, R. S., A. M. Kate, Manzoore Elahi M. Soudagar, V. D. Wakchaure, Sagar Balgude, I. M. Rizwanul Fattah, Nik-Nazri Nik-Ghazali et al. "Influence of Silica Nano-Additives on Performance and Emission Characteristics of Soybean Biodiesel Fuelled Diesel Engine". Energies 14, n.º 5 (9 de março de 2021): 1489. http://dx.doi.org/10.3390/en14051489.

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The present study examines the effect of silicon dioxide (SiO2) nano-additives on the performance and emission characteristics of a diesel engine fuelled with soybean biodiesel. Soybean biofuel was prepared using the transesterification process. The morphology of nano-additives was studied using scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The Ultrasonication process was used for the homogeneous blending of nano-additives with biodiesel, while surfactant was used for the stabilisation of nano-additives. The physicochemical properties of pure and blended fuel samples were measured as per ASTM standards. The performance and emissions characteristics of different fuel samples were measured at different loading conditions. It was found that the brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) increased by 3.48–6.39% and 5.81–9.88%, respectively, with the addition of SiO2 nano-additives. The carbon monoxide (CO), hydrocarbon (HC) and smoke emissions for nano-additive added blends were decreased by 1.9–17.5%, 20.56–27.5% and 10.16–23.54% compared to SBME25 fuel blends.

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C, Vijayakumar, Murugesan A, Subramaniam D e Panneerselvam N. "An Experimental Investigation of Diesel Engine Fuelled with MgO Nano Additive Biodiesel - Diesel Blends". Bulletin of Scientific Research 1, n.º 2 (16 de novembro de 2019): 28–34. http://dx.doi.org/10.34256/bsr1924.

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In this experimental investigation compacts the performance and emissions of compression ignition engines fuelled with MgO nano additive, maducaindica bio diesel blends were examined. Based upon the previous literatures only 20% mahuca methyl ester fuel blends without nano additives is suitable for compression ignition engine without affecting engine efficiency and its characteristics. In this paper magnesium oxide nano additives are added into the 40% Mahucaindica biodiesel- diesel blends at the rate of 50ppm for developing the test fuels. In this nano additives improve the properties of diesel fuel like viscosity, calorific value and decreased the flash point and fire point. Then compared the performance and emissions differences of all blended fuels used as a fuel in a diesel engine. The observation of results, 40MgO + 50ppm blended fuels brake thermal efficiency is improved then CO, HC, CO2and smoke decreased compared to other fuel blends. The results are taken into account, a blend of 40MgO+ Mgo50ppm is the best blend ratio compared than other blends with nano additives.

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Li, Ting, Xianggang Chen, Junhai Wang, Lixiu Zhang, Xiaoyi Wei, Libo Zhao e Mengzhou Ma. "Research progress of nano lubricating additives". IOP Conference Series: Earth and Environmental Science 680, n.º 1 (1 de março de 2021): 012084. http://dx.doi.org/10.1088/1755-1315/680/1/012084.

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Gladunova, O. I., V. A. Lysenko, O. V. Astashkina, A. A. Lysenko e V. N. Dokuchaev. "Polyoxadiazole fibers modified by nano-additives". Russian Journal of General Chemistry 83, n.º 1 (janeiro de 2013): 164–68. http://dx.doi.org/10.1134/s1070363213010362.

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Reddy, P. Ravi Kanth, Duvvuru Yasaswini, P. Pandu Ranga Reddy, Mohamed Zeineldin, M. J. Adegbeye e Iqbal Hyder. "Applications, challenges, and strategies in the use of nanoparticles as feed additives in equine nutrition". August-2020 13, n.º 8 (2020): 1685–96. http://dx.doi.org/10.14202/vetworld.2020.1685-1696.

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The rapid expansion of nanotechnology has been transforming the food industry by increasing market share and expenditure. Although nanotechnology offers promising benefits as feed additives, their usage in equines is primarily geared toward immunotherapy, hyper-immunization techniques, drug delivery systems, grooming activities, and therapeutic purposes. Nanoparticles could be engaged as alternatives for antibiotic feed additives to prevent foal diarrhea. Gold nanoparticles are proved to provide beneficial effects for racehorses by healing joint and tendon injuries. Because of the poor bioavailability of micro-sized mineral salts, the usage of nano-minerals is highly encourageable to improve the performance of racehorses. Nano-Vitamin E and enzyme CoQ10 for equines are no longer a simple research topic because of the increased commercial availability. Employing nanotechnology-based preservatives may offer a promising alternative to other conventional preservatives in preserving the quality of equine feed items, even during an extended storage period. While nanoparticles as feed additives may provide multitudinous benefits on equines, they could elicit allergic or toxic responses in case of improper synthesis aids or inappropriate dosages. The safety of nano-feed additives remains uninvestigated and necessitates the additional risk assessment, especially during their usage for a prolonged period. To adopt nano-feed additives in horses, there is an extreme paucity of information regarding the validity of various levels or forms of nanoparticles. Further, the currently available toxicological database on the topic of nano-feed additives is not at all related to equines and even inadequate for other livestock species. This review aims to provide new insights into possible future research pertaining to the usage of nano-feed additives in equines.

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Teses / dissertações sobre o assunto "Nano-additives"

Puthur, Jayapalan Amal Raj. "Properties of cement-based materials in the presence of nano and microparticle additives". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49104.

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Cement clinker production is a highly resource and energy intensive process and contributes substantially to annual global anthropogenic greenhouse gas emissions. One potential pathway to reduce the environmental footprint of cement-based materials is through the reduction of clinker content in concrete by partial replacement of cement with fillers. In this investigation, the partial replacement of cement with chemically inert nano and microsized fillers of titanium dioxide (TiO₂) and limestone was examined. The effects of nano and micro fillers on early-age properties, long-term properties, photocatalytic properties (for TiO₂-cement mixtures) and life cycle costs were measured and compared. Investigation of early-age properties shows that nanoparticles increase rate and degree of early cement hydration and chemical shrinkage due to heterogeneous nucleation effect. In contrast, coarser microparticles (>3µm in this research) maintain or marginally decrease the rate and degree of early cement hydration and decrease chemical shrinkage due to a dilution effect. In addition, temperature sensitivity of hydration reactions increases in the presence of nanoparticles. Investigation of long-term properties shows that pore size refinement is possible with the partial replacement of cement with nanoparticle fillers. But the long-term tests of filler-cement mixes also demonstrate that, compared to ordinary portland cement mix, the strength decreases and permeability increases. Analysis of photocatalytic properties of TiO₂-cement mixtures showed a lack of an appropriate testing procedure for nitrogen oxide (NOₓ) gas conversion by cement-based materials. Thus, a new standardized procedure and photocatalytic efficiency factor for characterizing photocatalytic NOₓ binding by cementitious materials is proposed. Life cycle analysis demonstrates that although inclusion of TiO₂ increases initial environmental impact of cementitious materials, the innovative photocatalytic properties of TiO₂ could improve sustainability. Life cycle analysis also shows that partial replacement of cement with limestone decreases environmental impact of cementitious mixtures due to lower processing “costs” of limestone compared to cement. Thus, the results from the current research demonstrate that variation of dosage and particle size of inert fillers can be used to tailor properties and structure of cement-based materials and that environmental sustainability can be improved by partial replacement of cement with inert fillers that introduce additional functionalities or fillers with lower embodied-energy and emissions.

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Kancharla, SaiKrishna. "Effect of Humidity and testing strategy on Friction Performance of model brake pads containing Nano-additives". OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2456.

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Interaction of brakes with external environment can considerably influence their performance which could relate to friction instabilities. Humidity can alter the chemistry of friction surfaces that could relate to unwanted phenomena which increase the cost of product. In addition to the chemical phenomena leading to unwanted reactions, there are physical effects related to adsorption of humidity and to modification of adhesion, accompanied with changes in contact surfaces and contact mechanics. The goal of this paper is to address these chemical and physical phenomena occurring at friction interfaces of model friction materials and to relate them to their performance. Friction tests were performed by using the environmental (equipped with humidity and temperature chambers) bench-top UMT TriboLab friction tester (Bruker) with scaled-down parameters derived from adopted real vehicle braking scenario. Wear surfaces/mechanisms were studied by using scanning electron microscopy (Quanta FEG 450 by FEI) equipped with the energy dispersive X-ray microanalysis (Inca System), and 3D optical microscope (NPFLEX by Bruker). Vibrational response was monitored by triaxial ICP Accelerometer (PCB Piezotronics, Model=356A45) and Oscilloscope (Agilent Technologies, Model= MSOX2024A). The data were analyzed by use of Matlab (MathWorks, Version= R2015A). The physical adsorption is dependent strongly on the surface topography; nevertheless, the chemical species/products generated at the friction surfaces are dominant factor dictating the quantity of absorbed humidity/species. Their chemistry differs from the chemistry of bulk and a complex correlation must be further studied. Adsorption considerably influences the friction performance (friction and its stability, wear, noise and environmental response/pollution capacity) of brake pads. Further studies addressing these phenomena are recommended. Keywords – humidity, friction, scanning electron microscopy, brake pads and X-ray microanalysis.

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Fleming, Steven. "Agro-process intensification using nano-structured micro-porous polymers as soil additives to enhance crop production". Thesis, University of Newcastle upon Tyne, 2012. http://hdl.handle.net/10443/1894.

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Polymerised High Internal Phase Emulsion Polymer (PHP) is a nano-structured microporous polymeric material with a variety of applications. PHPs may have a role to play in sustaining or enhancing crop yields in increasingly alien environments. An elastic hydrophilic version has been developed that has been shown to increase crop yields when used as a soil additive. Soil is a natural carrier of water and nutrients as well as bacteria all of which are widely distributed in the soil and inefficiently maintained and utilised by plants. When polymer is added to the soil, water is attracted to the polymer because of its hydrophilic nature, then roots are attracted to the water and nutrients (if present) in the polymer and they become intimately associated with PHP which therefore brings the plant into close proximity with any fertiliser and bacteria loaded into the polymer. Hence the polymer promotes the interactions between water/nutrients/bacteria/plant roots as well as root exudates within microscopic scale acting as a synthetic rhizosphere which benefits the plant in three ways: (1) Efficient water utilisation and conservation by the plant thus allowing plants to grow in drier environments than would otherwise be possible. The dry weight of soybean shoots with PHP added was increased over 100% compared to plants with no PHP. (2) By adding a fertiliser component to the polymer it can act as a slow release fertiliser, releasing the fertiliser in close proximity to the plant roots, so a larger proportion is utilised by the plant rather than being leached away as normally happens when fertiliser is added direct to the soil. By modifying the production method of PHP so that it contained ammonium sulphate, a major component of many fertilisers, the dry weights of soybean shoots and pea shoots were increased by 66% and 48% respectively after 6 weeks growth. (3) By loading the polymer with beneficial bacteria and fungi, in particular nitrogen fixing bacteria and mycorrhizal fungi, it then offers a protective environment for the organisms which then have a competitive advantage over other soil organisms so their numbers can increase enabling them to make a significant contribution to the nutrient requirements of the plants, in particular nitrogen. The addition of PHP soaked with Azospirillum brasilense broth produced a dry weight increase in grass shoots of 9.6%, 9.5%, 40% and 145% after 3, 6, 9 and 12 weeks growth respectively compared to plants with no PHP or bacteria

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Diar, Bakerly Bashar [Verfasser], e Josef [Akademischer Betreuer] Breu. "Innovative, Platy Nano-Additives as Efficient Flame Retardants for Polymer Nanocomposites / Bashar Diar Bakerly. Betreuer: Josef Breu". Bayreuth : Universität Bayreuth, 2016. http://d-nb.info/1093512180/34.

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Berry, Seth David. "Experimental Characterization of Mode I Fracture Toughness of Reinforced Carbon Fiber Laminate with Nano-Cellulose and CNT Additives". Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/72132.

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Effective treatment of carbon fiber components to improve delamination resistance is vital to the application of such materials since delamination is one of the biggest concerns regarding the use of composites in the aerospace sector. Due to the significant application benefit gained from increased stiffness to density ratio with composite materials, innovative developments resulting in improved through-thickness strength have been on the rise. The inherent anisotropy of composite materials results in an added difficulty in designing structural elements that make use of such materials. Proposed techniques to improve the through-thickness strength of laminar composites are many and varied; however all share the common goal of improving inter-laminar bond strength. This research makes use of novel materials in the field of wet flocking and Z-pinning. Cellulose nanofibers (CNFs) have already demonstrated excellent mechanical properties in terms of stiffness and strength, originating at the nano-scale. These materials were introduced into the laminate while in a sol-gel suspension in an effort to improve load transfer between laminate layers. The effect of CNFs as lightweight renewable reinforcement for CFRPs will be investigated. Carbon nanotube (CNT) additives were also considered for their beneficial structural properties.
Master of Science

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Pirondelli, Andrea. "Production and Electrical Characterization of Low Density Polyethylene-based Micro- and Nano-dielectrics containing Graphene Oxide, Functionalized Graphene and Carbon Black additives". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Oggigiorno la ricerca di nuovi materiali per gradatori di campo da impiegarsi in accessori di cavi ha iniziato a studiare alcuni materiali nano dielettrici con proprietà elettriche non lineari con la tensione ed aventi proprietà migliorate rispetto al materiale base. Per questo motivo in questo elaborato si sono studiati materiali nanostrutturati a base di polietilene a bassa densità (LDPE) contenenti nano polveri di grafene funzionalizzato (G*), ossido di grafene (GO) e carbon black (CB). Il primo obiettivo è stato quello di selezionare e ottimizzare i metodi di fabbricazione dei provini. La procedura di produzione è suddivisa in due parti. Nella prima parte è stata utilizzatala tecnica del ball-milling, mentre nella seconda un pressa termica (thermal pressing). Mediante la spettroscopia dielettrica a banda larga (BDS) si sono misurate le componenti reali e immaginarie della permettività e il modulo della conducibilità del materiale, in tensione alternata. Il miglioramento delle proprietà rispetto al provino di base composto dal solo polietilene si sono ottenute quando il quantitativo delle nanopolveri era maggiore. Le misure sono state effettuate sia a 3 V che a 1 kV. Attraverso misurazioni di termogravimetria (TGA) si è osservato l’aumento della resistenza termica di tutti i provini, soprattutto nel caso quando la % di nanopolveri è maggiore. Per i provini LDPE + 0.3 wt% GO e LDPE + 0.3 wt% G* si è misurata la resistenza alle scariche parziali attraverso la valutazione dell’erosione superficiale dei provini. Per il provino contenente G* è stato registrato una diminuzione del 22% del volume eroso, rispetto al materiale base, mentre per quello contenente GO non vi sono state variazioni significative. Infine si è ricercata la resistenza al breakdown di questi ultimi tre provini sopra citati. Per la caratterizzazione si è fatto uso della distribuzione di Weibull. Lo scale parameter α risulta aumentare solo per il provino LDPE + 0.3 wt% G*.

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FIORENTINI, CECILIA. "Sviluppo di nuove plastiche a base biologica per il settore dell'imballaggio alimentare". Doctoral thesis, Università Cattolica del Sacro Cuore, 2022. http://hdl.handle.net/10280/115281.

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In questa tesi di dottorato sono state esplorate diverse strategie per produrre industrialmente nuove miscele di bio-plastiche a base di PLA-PHB con migliori caratteristiche di sostenibilità, con l’impiego di PHB derivato da bucce di patate e nano-additivi di cellulosa e chitina derivati da sottoprodotti (quali paglia di grano e gusci di gamberi). Da queste miscele sono stati ottenuti dei film che sono stati testati anche per la compatibilità al contatto con alimenti e sono risultati in linea con il regolamento EU 10/2011 per alcune specifiche applicazioni alimentari. Seguendo le attuali innovazioni nel settore del packaging alimentare, sono stati realizzati su scala industriale anche materiali attivi aggiungendo estratti commerciali d’arancia e di foglie d’olivo sia per estrusione, sia attraverso la tecnica di coating. L’attività dei film prodotti è stata valutata utilizzando simulanti alimentari e attraverso l’applicazione diretta su burger di carne fresca di maiale per valutare una possibile estensione della durata di conservazione. In generale, i risultati ottenuti sono promettenti e rappresentano un buon punto di partenza per lavori futuri che dovranno testare se un aumento della concentrazione degli estratti nelle formulazioni possa migliorare ulteriormente l’attività dei film realizzati.
In this PhD thesis several strategies were explored to industrially manufacture new bio-plastic blends based on PLA-PHB with improved sustainability performance, obtained with PHB from potato peels, cellulose, and chitin nano-additives from by-products (e.g., wheat straw and shrimp shells). The blends were used to produce films for the food sector that have been tested for compatibility with foodstuffs resulting compliant with EU Regulation 10/2011 for some target food applications. Based on the current innovations in the field of food packaging, active materials have also been produced on an industrial scale by adding commercial extracts, specifically of orange peels and olive leaves, either by extrusion or through the technique of surface coating. The activity of the films produced was evaluated using food simulants and through direct application on fresh pork burgers to assess a possible extension of meat shelf-life. In general, the results obtained are promising and represent a good starting point for future work, which should aim at testing if an increase in the concentration of the extracts in the formulations could further improve the activity of the films produced.

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Souza, Edith Marie Malateaux de. "Adesivo de contato de policloropreno base aquosa nanoaditivado e condicionado magneticamente". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-21062016-113107/.

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Atualmente, os adesivos de contato de policloropreno base aquosa, possuem capacidade de adesão, variando entre 1,15 até 2,75 kgf/cm2. Em contrapartida, os adesivos de policloropreno base solvente, suportam tensões médias de cisalhamento de 3,8 kgf/cm2. Esta pesquisa apresenta uma proposta inovadora de condicionamento magnético do adesivo de contato de policloropreno base aquosa com o objetivo de aumentar a capacidade de aderência entre o adesivo e o substrato. Para promover um incremento na capacidade de adesão do adesivo de policloropreno base aquosa, formulou-se um adesivo utilizando um nanoaditivo, o gás carbônico como catalisador e um processo de condicionamento magnético precedente à etapa de aplicação sobre os substratos. Os resultados obtidos demonstraram aumento médio de 292 % na tensão de cisalhamento do adesivo condicionado magneticamente quando comparado com o adesivo de mesma formulação sem o condicionamento magnético, e quando comparado com um adesivo comercial de policloropreno base aquosa, o aumento foi de 122 %.
Currently, the aqueous based polychloroprene contact adhesive presents an adhesion capacity variation between 1,15 and up to 2,75 kgf/cm2. However, the solvent based polychloroprene adhesives support average tensions of shearing of 3,8 kgf/cm2. This research is an innovative proposal for magnetic conditioning of the aqueous based polychloroprene contact adhesive with the purpose of increasing the adherence capacity between the adhesive and the substrate. To promote an increase of adhesion to the aqueous based polychloroprene contact adhesive, we formulated one adhesive using a nano-additive, carbon dioxide as catalyst, and a magnetic conditioning process before the phase of application on the substrates. The results obtained show an average increase of 292 % in the shearing tension of the adhesive magnetically conditioned when compared with an adhesive of the same formulation without the magnetic conditioning and 122 % increase when compared to the commercial aqueous based polichloroprene adhesive.

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Lahouij, Imène. "Mécanismes de lubrification des nanoparticules à structure Fullerène : approche multi-échelle". Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00790813.

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Les fullerènes de bisulfure métallique de type ( M eS2 , où Me= Mo et W) rencontrent un intérêt croissant du fait de leurs pouvoirs anti usure et réducteur de frottement en régime de lubrification limite. Les propriétés tribologiques de ces nanoparticules, dépendent à la fois de leurs caractéristiques intrinsèques (structure, morphologie, taille, ... ), des conditions de sollicitations (nature des surfaces, pression, température, ... ) ainsi que du cocktail d'additifs présent dans une formulation d'huile moteur. La compréhension de l'origine de ces propriétés passe obligatoirement par une parfaite connaissance du mode d'action des nanoparticules. L'objectif de ce travail de thèse est d'identifier les paramètres pouvant avoir une influence sur le comportement des nanoparticules à l'échelle nanométrique et de faire le lien entre ce comportement, les mécanismes de lubrification des nanoparticules, et leurs propriétés tribologiques. Afin de répondre à cet objectif nous avons adopté une approche multi échelle qui consiste dans un premier temps à étudier le comportement de fullerènes individuels (IF - M eS2 , ou Me= Mo et W) en cours de sollicitation. Ainsi grâce à une méthodologie expérimentale originale couplant la technique de nano indentation à une observation in situ dans un microscope électronique à transmission haute résolution (HRMET), nous avons visualisé pour la toute première fois et en temps réelle comportement de nanoparticules individuelles d'if- M eS2 (Me= Mo et W) sollicitées en compression et/ou en cisaillement dans un contact dynamique. Cette étude a permis d'identifier l'influence des caractéristiques intrinsèques des fullerènes sur leur réponse à l'échelle nanométrique et d'estimer des pressions de contact pour lesquelles le fullerène s'exfolie, roule ou glisse dans le contact. Nous nous sommes ensuite intéressés aux mécanismes de lubrification des fullerènes en dispersion dans une base lubrifiante, en condition de lubrification limite. En se basant sur des analyses XPS et des observations MEB et MET des tribofilms et des débris d'usure générés à l'issu d'essais de frottement réalisés dans trois contacts de nature différente (acier, alumine et DLC), nous avons clairement montré que les propriétés lubrifiantes des nanoparticules d'IF - M eS2 (Me= Mo et W) dépendaient à la fois de leurs caractéristiques intrinsèques et de la nature des surfaces frottantes. Ainsi un lien a été établi entre le comportement des fullerènes à l'échelle nanométrique et leur mode d'action dans un contact tribologique. Enfin, l'influence de la mise en dispersion des nanoparticules sur leurs propriétés tribologiques a été étudiée. Les propriétés tribologiques des nanoparticules dans une huile moteur ont été également évaluées. Deux approches expérimentales de type 'Bottom up' et 'Top dawn'ont été adoptées afin d'évaluer les interactions entre les nanoparticules et l'ensemble des additifs présents dans une huile complétement formulée. L'influence de la température sur les propriétés tribologiques des nanoparticules a été également abordée.

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陳世璋. "The Effect of Nano-Material Additives on". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/16270989635782547076.

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碩士
國立交通大學
機械工程系所
95
This investigation is focused on cultures with NIH3T3 fibroblasts, in order to observe the effect of different materials on adherence, growth and proliferation. A scanning electron microscope was used to characterize cell morphology. The fibroblasts were able to attach on all substrates and coatings after 1 to 2 days. On smooth surface (flask and Ti substrates), cells became gradually attached on substrates at early phases; on rough-surface materials (CNTs/Ti ), thin and long filopodia between the cells were connected to the substrate. Surface roughness has significant effect on the cell morphology and cell adhesion number. Additionally , the fibroblasts under SEM showed better and faster attachment and greater extension on CNTs/Ti coatings than flask and Ti alloy. This indicates that the carbon nanotube composite coating on Ti alloy has remarkable biocompatibility.

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Livros sobre o assunto "Nano-additives"

Sinapius, Michael, e Gerhard Ziegmann, eds. Acting Principles of Nano-Scaled Matrix Additives for Composite Structures. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68523-2.

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Björnström, Joakim. Influence of nano-silica and organic admixtures on cement hydration: A mechanistic investigation. [Go̊teborg], Sweden: Dept. of Chemistry, Göteborg University, 2005.

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Ziegmann, Gerhard, e Michael Sinapius. Acting Principles of Nano-Scaled Matrix Additives for Composite Structures. Springer International Publishing AG, 2022.

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Ziegmann, Gerhard, e Michael Sinapius. Acting Principles of Nano-Scaled Matrix Additives for Composite Structures. Springer International Publishing AG, 2021.

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Kwak, Hae-Soo. Nano- and Microencapsulation for Foods. Wiley & Sons, Incorporated, John, 2014.

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Kwak, Hae-Soo. Nano- and Microencapsulation for Foods. Wiley & Sons, Incorporated, John, 2014.

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Nano- and Microencapsulation for Foods. Wiley-Blackwell, 2014.

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Kwak, Hae-Soo. Nano- and Microencapsulation for Foods. Wiley & Sons, Limited, John, 2014.

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Capítulos de livros sobre o assunto "Nano-additives"

Sui, Tianyi. "Nano Lubricant Additives". In Progress in Lubrication and Nano- and Biotribology, 29–50. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003096443-2.

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Jafarizadeh-Malmiri, Hoda, Zahra Sayyar, Navideh Anarjan e Aydin Berenjian. "Nano-additives for Food Industries". In Nanobiotechnology in Food: Concepts, Applications and Perspectives, 41–68. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05846-3_4.

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Singh, N. B., e Chris U. Onuegbu. "Nano-Minerals as Livestock Feed Additives". In 21st Century Nanoscience – A Handbook, 20–1. Boca Raton, Florida : CRC Press, [2020]: CRC Press, 2020. http://dx.doi.org/10.1201/9780429351587-20.

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Santagata, Ezio, Orazio Baglieri, Lucia Tsantilis e Giuseppe Chiappinelli. "Storage Stability of Bituminous Binders Reinforced with Nano-Additives". In RILEM Bookseries, 75–87. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-7342-3_7.

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Gitis, Norm V., e Jun Xiao. "Efficient Tribology Testing of Lubricating Oils with Nano-Additives". In Advanced Tribology, 925. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03653-8_315.

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Keerthi Kumar, N., G. H. Raghunandan e Raveendra Gudodagi. "Improvement of Flat Plate Collector Performance Using Nano-additives". In Sustainable Computing, 307–17. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-13577-4_19.

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Xu, Yufu, Yubin Peng, Tao You, Lulu Yao, Jian Geng, Karl D. Dearn e Xianguo Hu. "Nano-MoS2 and Graphene Additives in Oil for Tribological Applications". In Nanotechnology in Oil and Gas Industries, 151–91. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60630-9_6.

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Karthickeyan, V., P. Balamurugan e R. Senthil. "Investigation of CI Engine Fueled with Ethanol Nano Additives Blended Diesel". In Springer Proceedings in Energy, 121–30. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2773-1_9.

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Liu, Xian Xian, Zhao Qiang Zeng e Bo Jun Chen. "Influence of Binder Additives on the Sintering of Nano-3Y-TZP". In Key Engineering Materials, 2290–92. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.2290.

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Ji, Hui Ming, Xiao Chuan Liu, Ying Lv, Cui Xia Li e Xiao Dong Chen. "SrTiO₃ Based Dual-Functional Ceramics with Nano-Additives". In Key Engineering Materials, 793–95. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.793.

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Trabalhos de conferências sobre o assunto "Nano-additives"

Frechette, M. F., C. Vanga-Bouanga e E. David. "Epoxy containing micro-nano carbonaceous composite additives". In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2015. http://dx.doi.org/10.1109/icpadm.2015.7295263.

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Bellisario, D., F. Quadrini, L. Santo e G. M. Tedde. "Manufacturing of Antibacterial Additives by Nano-Coating Fragmentation". In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6415.

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This study demonstrates the potential of a novel technique called nano-coating fragmentation to produce silver nanocomposites with antibacterial properties. This process starts from the production of an antibacterial additive without the separate production of silver nanoparticles. The additive was produced by depositing a silver nanofilm on polypropylene (PP) pellets by a physical vapor deposition sputtering process. Different set of sputtering parameters were used and different percentage of Ag were deposited on pellets. Afterwards, PP coated pellets were inserted in an injection molding machine to produce, in a single step, the nanocomposite by using shear forces. In facts, nanoparticles originate by the fragmentation of nano-coatings. The homogenously distributed silver particles were observed by microscope onto the nanocomposite surfaces. Thermal and mechanical properties of the nanocomposites were measured as well. The presence of dispersed nanofiller was confirmed by DSC analysis of the molded samples.

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Matkowski, Przemyslaw, Tomasz Falat e Andrzej Moscicki. "Comparative analysis of novel thermal interface containing nano additives". In 2014 IEEE 16th Electronics Packaging Technology Conference (EPTC). IEEE, 2014. http://dx.doi.org/10.1109/eptc.2014.7028330.

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Boyne, Devon A., Joshua A. Orlicki e Mark H. Griep. "Plasmonic nano-additives for polymer composites: Preservation of tailored functionality". In 2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2017. http://dx.doi.org/10.1109/nano.2017.8117362.

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Romano, Vittorio, Carlo Naddeo, L. Vertuccio, Khalid Lafdi e Liberata Guadagno. "Anisotropic thermal conductivity study of nano-additives/epoxy based nanocomposites". In 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5046010.

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Liu, Chia-Hsin, Chyung Ay, Jo-Chuan Kan e Maw-Tien Lee. "Improving greenhouse cladding by the additives of inorganic nano-particles". In 2018 IEEE International Conference on Applied System Innovation (ICASI). IEEE, 2018. http://dx.doi.org/10.1109/icasi.2018.8394346.

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Stephens, Matthew, Eric Petersen, David Reid, Rodolphe Carro e Sudipta Seal. "Nano Additives and Plateau Burning Rates in Composite Solid Propellants". In 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-4790.

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Shayea, Iman Shuaib, e Jalil R. Ugal. "Preparation of epoxy nano composites, using some nano additives and studying the thermal and conductivity properties". In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0115761.

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Zhao, Yi, Shuqin Wang e Dandan Li. "Study on the Coal Combustion and Desulfurization Catalyzed by Nano-Additives". In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163506.

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Rodriguez, Felix A., James C. Thomas, David Teitge e Eric L. Petersen. "Burning Rate Characterization of Ammonium Perchlorate Pellets Containing Nano-Catalytic Additives". In AIAA Scitech 2020 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2020. http://dx.doi.org/10.2514/6.2020-1425.

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Relatórios de organizações sobre o assunto "Nano-additives"

Zhao, Bin, Sheng Dai, Jun Qu, Huimin Luo, Beth Armstrong e Ashlie Martini. Hybrid Ionic-Nano-Additives for Engine Lubrication to Improve Fuel Efficiency. Office of Scientific and Technical Information (OSTI), março de 2018. http://dx.doi.org/10.2172/1430828.

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