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Journal articles on the topic 'Hydrophobic silane'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Cai, Ning, Yao Xia Li, and Da Xiang Cui. "Application Studies on Silane Hydrophobic Agents for Concrete Protection." Advanced Materials Research 1053 (October 2014): 297–302. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.297.

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In this paper, the function of silane hydrophobic agents to protect concretes under different varieties and different concentrations were studied. Penetration depth, water absorption ratio and contact angle were measured and compared, the influences of silane hydrophobic agents on the concretes protection under different condition were investigated. Results showed that silane hydrophobic agents exhibit better properties on concretes protection. 24h water absorption ratios of all silane hydrophobic agents surpassed the trade standard JC/T 902-2002 Silicone hydrophobic agent for construction sur

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2

Zhang, Peng, Tie Jun Zhao, F. H. Wittmann, and Shao Chun Li. "Preparation and Characteristics of Integral Water Repellent Cement-Based Materials." Materials Science Forum 675-677 (February 2011): 1189–92. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.1189.

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Polymers are often applied in concrete for multiple purposes and aims. For instance, surface impregnation of concrete with silanes is a reliable technology to protect cement-based materials from ingress of aggressive solutions into the materials. An alternative method is to add silane emulsion into fresh concrete or mortar to produce integral water repellent materials. In this contribution integral water repellent concrete was prepared by adding 1 %, 2 %, 3 %, 4 % and 6 % of silane emulsion. The influence of silane emulsion on the compressive strength, porosity and pore size distribution, wate

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3

Feng, Zhijun, Fajun Wang, Ting Xie, Junfei Ou, Mingshan Xue, and Wen Li. "Integral hydrophobic concrete without using silane." Construction and Building Materials 227 (December 2019): 116678. http://dx.doi.org/10.1016/j.conbuildmat.2019.116678.

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4

Spaeth, Valerie, Jean Paul Lecomte, Marie Paule Delplancke, Jeanette Orlowsky, and Till Büttner. "Impact of Silane and Siloxane Based Hydrophobic Powder on Cement-Based Mortar." Advanced Materials Research 687 (April 2013): 100–106. http://dx.doi.org/10.4028/www.scientific.net/amr.687.100.

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Impact of the addition of silane and siloxane based hydrophobic powders on cement based mortar was studied. Effect of powder addition on mechanical properties and water absorption of cement based mortar is described. Impact of accelerated ageing, including UV radiation, and rain-sun cycles on hydrophobic performance was assessed, demonstrating excellent durability of silane-based hydrophobic performance.

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5

Zhang, Xian Yun, Xue Feng Song, Jin Tao Li, and Wen Cheng Yin. "Preparation of Modified Silica Sol, the Mechanism Analysis and the Applied Research." Applied Mechanics and Materials 687-691 (November 2014): 4319–22. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.4319.

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Using the methyl trimethoxy silane (MTMS) and methyl triethoxy siliance (MTES) each modified the surface of nanosilica sol.Through measuring the percent conversion of silance coupling agent and the water absorption of the cement paste.the optimal technical processes of the modified silica sol were obtained:: Mcoupling agent = 3:1,pH = 2,the synthesis temperature of 40 °C,the Synthetic time for 40 min. MTMS hydrophobic effect of modified silica sol significantly better than MTES, the higher the stability of the solution and the infrared spectrum analysis of the grafting mechanism of silane coup

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6

Sun, Hong Yao, Zheng Yang, Gao Xia Sun, and Xue Feng Xu. "The Research of Silane Oligomer with Lower Valatilization Rate for Protecting Concrete." Applied Mechanics and Materials 357-360 (August 2013): 1318–22. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.1318.

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As one of the measures to improve the durability of concrete, silane penetrating hydrophobic agents can preserve the properties of respiratory function of concrete and can prevent the penetration from harmful medium such as chloride ions. Because of low molecular weight of the silane penetrating hydrophobic agent such as isobutyl triethoxysilane, high volatilization rate of silane can result in waste of material in construction process. The silane oligomer was obtained by radical polymerization reaction with suitable monomers, initiators and reaction conditions. Furthermore, we verified the st

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7

Lopez de Armentia, Sara, Mariola Pantoja, Juana Abenojar, and Miguel Martinez. "Development of Silane-Based Coatings with Zirconia Nanoparticles Combining Wetting, Tribological, and Aesthetical Properties." Coatings 8, no. 10 (2018): 368. http://dx.doi.org/10.3390/coatings8100368.

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Silane-based coatings with nanoparticles have been widely used in applications related to surface protection. Between them, the improvement of corrosion resistance by increasing the hydrophobicity is one of the main research goals. However, most coatings present problems of low wear resistance and poor aesthetic appearance. Therefore, the overall goal of this research is to manufacture hydrophobic sol-gel coatings based on silanes which comply with good tribological and aesthetical properties. In the present study, stainless steel plates were coated with a silane-based solution containing zirc

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8

Shi, Feilong, Jia Xu, and Zhanzhu Zhang. "Study on UV-protection and hydrophobic properties of cotton fabric functionalized by graphene oxide and silane coupling agent." Pigment & Resin Technology 48, no. 3 (2019): 237–42. http://dx.doi.org/10.1108/prt-09-2018-0098.

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Purpose This study aims to prepare UV protection and hydrophobic fabric through modifying cotton fabric by graphene oxide and silane coupling agent. The graphene oxide and silane coupling agent (KH570) are anchored on the cotton fabric by a stable chemical bond. Design/methodology/approach Graphene oxide was prepared by modified Hummers method. The fabric sample was treated with graphene oxide and silane coupling agent KH570 using simple dipping-padding-drying method. The effects of the dosage of graphene oxide, silane coupling agent KH570 and curing temperature were determined by single varia

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M., Hasan, Deepu Gopakumar, Vishnu Arumughan, et al. "Robust Superhydrophobic Cellulose Nanofiber Aerogel for Multifunctional Environmental Applications." Polymers 11, no. 3 (2019): 495. http://dx.doi.org/10.3390/polym11030495.

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The fabrication of superadsorbent for dye adsorption is a hot research area at present. However, the development of low-cost and highly efficient superadsorbents against toxic textile dyes is still a big challenge. Here, we fabricated hydrophobic cellulose nanofiber aerogels from cellulose nanofibers through an eco-friendly silanization reaction in liquid phase, which is an extremely efficient, rapid, cheap, and environmentally friendly procedure. Moreover, the demonstrated eco-friendly silanization technique is easy to commercialize at the industrial level. Most of the works that have reporte

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10

Kannarpady, Ganesh K., Rajesh Sharma, Bo Liu, Steve Trigwell, Charles Ryerson, and Alexandru S. Biris. "Silane decorated metallic nanorods for hydrophobic applications." Applied Surface Science 256, no. 6 (2010): 1679–82. http://dx.doi.org/10.1016/j.apsusc.2009.09.093.

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11

Baranov, O. V., L. G. Komarova, and S. S. Golubkov. "Hydrophobic coatings based on triethoxy(octyl)silane." Russian Chemical Bulletin 69, no. 6 (2020): 1165–68. http://dx.doi.org/10.1007/s11172-020-2884-6.

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12

Baruwa, Akinsanya Damilare, Esther Titilayo Akinlabi, Oluseyi Philip Oladijo, Stephen Akinwale Akinlabi, and Jeff Chinn. "Physicochemical Characteristics of an Ultra-Thin Hydrophobic Trichlorosilanes Using SiO₂ as Adhesion." Key Engineering Materials 796 (March 2019): 80–87. http://dx.doi.org/10.4028/www.scientific.net/kem.796.80.

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The aim of the research is to subject the three different silanes to chemical and electrochemical investigations in other to determine the most efficient organic compound. Three types of hydrophobic silanes [Tris (Trimethylsiloxy) silyethyl] dimethylchlorosilane (Alkyl); Tridecafloro-1,1,2,2-tetrahydrooctyltrichlorosilane (FOTS) and Henicosyl-1,1,2,2-tetrahydrododecyltricholrosilane (FDDTS) are presented and investigated. The three silanes are of different composition but are deposited at the same parameters and conditions. The chemical investigation was studied through (attenuated total refle

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Meléndez-Zamudio, Miguel, Ileana Bravo-Flores, Eulalia Ramírez-Oliva, et al. "An Approach to the Use of Glycol Alkoxysilane–Polysaccharide Hybrids in the Conservation of Historical Building Stones." Molecules 26, no. 4 (2021): 938. http://dx.doi.org/10.3390/molecules26040938.

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Stone consolidants have been widely used to protect historical monuments. Consolidants and hydrophobic formulations based on the use of tetraethoxysilane (TEOS) and alkylalkoxysilanes as precursors have been widely applied, despite their lack of solubility in water and requirement to be applied in organic media. In the search for a “greener” alternative based on silicon that has potential use in this field, the use of tetrakis(2-hydroxyethyl)silane (THEOS) and tris(2-hydroxyethyl)methyl silane (MeTHEOS) as precursors, due their high water solubility and stability, is proposed in this paper. It

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14

Sohawon, Haris, and Hans Beushausen. "The effect of hydrophobic (silane) treatment on concrete durability characteristics." MATEC Web of Conferences 199 (2018): 07015. http://dx.doi.org/10.1051/matecconf/201819907015.

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Hydrophobic (silane) impregnation represents a cost-effective way to increase the durability of concrete structures in cases where insufficient design cover quality and depth have been achieved. The water repellent product lines the internal capillary pore structure and provides a water-repellent concrete surface. Thus, the risk of reinforcement corrosion initiation and subsequent deterioration can be reduced as the ingress of water-dissolved aggressive species (chlorides) is minimised or prevented. The purpose of this study was to investigate the effect of silane impregnation on durability in

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15

KUBO, Yoshimori, Yuzuru TAMAI, Atsushi HATTORI, and Toyoaki MIYAGAWA. "Evaluation of Hydrophobic Performance of Silane Impregnated Concretes." Journal of the Society of Materials Science, Japan 52, no. 9 (2003): 1095–100. http://dx.doi.org/10.2472/jsms.52.1095.

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16

Widati, Alfa Akustia, Nuryono Nuryono, Dessy Puspa Aryanti, et al. "Preparation of Water Repellent Layer on Glass Using Hydrophobic Compound Modified Rice Hull Ash Silica." Indonesian Journal of Chemistry 18, no. 4 (2018): 587. http://dx.doi.org/10.22146/ijc.26714.

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In this study water repellent layered glass has been prepared by coating silica (SiO2) combined with a hydrophobic silane compound. SiO2 was extracted from rice hull ash and two silane compounds, namely hexadecyltrimethoxysilane (HDTMS) and trimethylchlorosilane (TMCS) were used. Coating was performed through two deposition techniques, i.e. one step (mono-layer) and layer by layer (LBL, multi-layer). The effect of silane to SiO2 mole ratio, silane type and layer number on the glass characters was evaluated. Characterization included hydrophobicity, transparency, surface roughness and stability

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17

Li, Ya-Yu, Guang-Ming Du, Xin-Jie Feng, Ya-Wei Mu, and De-Qiang Li. "Extraction and Hydrophobic Modification of Cotton Stalk Bark Fiber." International Journal of Polymer Science 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/8769360.

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Cotton stalk bark fiber (CSBF) was extracted at high temperature and under high pressure, under the condition of the alkali content of 11 wt%. Experimental results proved that the extraction yield of CSBF was 27.3 wt%, and the residual alkali concentration was 2.1 wt%. Then five kinds of modifiers including methyl methacrylate (MMA), MMA plus initiator, epoxy propane, copper ethanolamine, and silane coupling agent were chosen to modify the surface of CSBF. It was found by measuring water retention value (WRV) that these five kinds of modifiers were all effective and the silane coupling agent w

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18

Dalod, Antoine R. M., Lars Henriksen, Tor Grande, and Mari-Ann Einarsrud. "Functionalized TiO2 nanoparticles by single-step hydrothermal synthesis: the role of the silane coupling agents." Beilstein Journal of Nanotechnology 8 (January 31, 2017): 304–12. http://dx.doi.org/10.3762/bjnano.8.33.

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A simple, robust and versatile hydrothermal synthesis route to in situ functionalized TiO2 nanoparticles was developed using titanium(IV) isopropoxide as Ti-precursor and selected silane coupling agents (3-aminopropyltriethoxysilane (APTES), 3-(2-aminoethylamino)propyldimethoxymethylsilane (AEAPS), and n-decyltriethoxysilane (DTES)). Spherical nanoparticles (ca. 9 nm) with narrow size distribution were obtained by using DTES or by synthesis performed without silane coupling agents. Rod-like nanoparticles along with 9 nm spherical nanoparticles were formed using aminosilane coupling agents beca

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19

Geng, Yongjuan, Shaochun Li, Dongshuai Hou, Xu Chen, and Zuquan Jin. "Effect of SiO2 Sol/Silane Emulsion in Reducing Water and Chloride Ion Penetration in Concrete." Coatings 10, no. 7 (2020): 682. http://dx.doi.org/10.3390/coatings10070682.

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Here, a new concrete hydrophobic treatment method is developed using SiO2 sol and silane emulsion. The effectiveness of the modification for concrete protection is evaluated through testing water absorption and chloride diffusion. Two types of concrete with different strength grades (C40, C50) are used as the research object. The results show that the water capillary absorption coefficient and chloride ion diffusion coefficient of concrete decrease greatly under the protection of SiO2 sol and silane emulsion. Additionally, the protection effect is better with the increase of SiO2 consumption.

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20

Zhang, Tianshou, Di Ying, Manlin Qi, et al. "Anti-Biofilm Property of Bioactive Upconversion Nanocomposites Containing Chlorin e6 against Periodontal Pathogens." Molecules 24, no. 15 (2019): 2692. http://dx.doi.org/10.3390/molecules24152692.

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Photodynamic therapy (PDT) based periodontal disease treatment has received extensive attention. However, the deep tissue location of periodontal plaque makes the conventional PDT encounter a bottleneck. Herein, upconversion fluorescent nanomaterial with near-infrared light excitation was introduced into the treatment of periodontal disease, overcoming the limited tissue penetration depth of visible light in PDT. Photosensitizer Ce6 molecules were combined with upconversion nanoparticles (UCNPs) NaYF4:Yb,Er with a novel strategy. The hydrophobic UCNPs were modified with amphiphilic silane, uti

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21

Ge, Xin, Xian Hui Song, Yong Ge, and Xiao Ping Cai. "The Research of Influence on the Freezing Resistance and the Permeation Resistance of Concrete With Spraying Silane." Key Engineering Materials 629-630 (October 2014): 213–17. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.213.

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Silane, as an extremely hydrophobic material, changes concrete surface from hydrophilic state to hydrophobic state by spraying on the surface of concrete. It has the ability to block the external corrosive medium to improve the durability of concrete. Three types of strength grade of concrete (C30, C40, C50) were designed, after spraying with silane on the surface of concrete, to measure the penetration depth of silane and the influence on water-absorption rate, liquid-absorption rate, chloride ion diffusion coefficient and salt frost resistance. The test result shows that: by spraying silane

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22

Al-Kheetan, Mazen J., Mujib M. Rahman, Muniswamappa N. Balakrishna, and Denis A. Chamberlain. "Performance enhancement of self-compacting concrete in saline environment by hydrophobic surface protection." Canadian Journal of Civil Engineering 46, no. 8 (2019): 677–86. http://dx.doi.org/10.1139/cjce-2018-0546.

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The purpose of this research is to enhance the performance of self-compacting concrete (SCC) to make it a more sustainable alternative to traditional concrete. SCC serves the purpose in harsh environments, therefore, requires protection against de-icing agents and harmful saline environments. This paper reports the results from a laboratory study evaluating the efficacy of two impregnants; pure-silane and water-based silane. Both materials were applied on dry and wet SCC specimens manufactured with high and medium doses of superplasticizer. When treatment is applied on dry samples, a significa

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23

Piyawongsiri, Thitirat, Chanapat Ammarinponchai, Supan Yodyingyong, Tshering Nidup, and Darapond Triampo. "Durable Superhydrophobic Silica Aerogel Coating from Hydrophobic Gel Synthesis." Key Engineering Materials 824 (October 2019): 156–62. http://dx.doi.org/10.4028/www.scientific.net/kem.824.156.

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Silica aerogel is a nanostructured porous solid material. It has a low bulk density, low thermal conductivity and can be hydrophobic. In this work, hydrophobic silica gel, a material used to form aerogel, is used instead of its powder form to avoid ultrafine air particles pollution. It is used to surface modified materials to make the materials superhydrophobic and still withstand physical abrasion that ordinary aerogel would not able to do. The superhydrophobic silica aerogel coating was designed by mixing the hydrophobic gel with DOW CORNING® 2405 resin as binder and varying DOWSIL™ Z-6137 s

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24

Korolkov, Ilya V., Asiya R. Narmukhamedova, Galina B. Melnikova, et al. "Preparation of Hydrophobic PET Track-Etched Membranes for Separation of Oil–Water Emulsion." Membranes 11, no. 8 (2021): 637. http://dx.doi.org/10.3390/membranes11080637.

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The paper describes the separation of an oil–water emulsion by filtration using poly(ethylene terephthalate) track-etched membranes (PET TeMs) with regular pore geometry and narrow pore size distribution. PET TeMs were modified with trichloro(octyl)silane to increase their hydrophobic properties. Conditions for the modification of PET TeMs with trichloro(octyl)silane were investigated. The results of changes in the pore diameters and the contact angle depend on the concentration of trichloro(octyl)silane and the soaking time are presented. The obtained samples were characterized by FTIR, AFM,

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Tang, Xinde, Chunli Shen, Wenjing Zhu, et al. "A facile procedure to modify filter paper for oil–water separation." RSC Advances 7, no. 48 (2017): 30495–99. http://dx.doi.org/10.1039/c7ra03754f.

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26

Donadio, Michel, Mirdash Bakalli, and Zeno Dan. "Reinforced concrete corrosion prevention/reduction by hydrophobic impregnation." MATEC Web of Conferences 289 (2019): 05002. http://dx.doi.org/10.1051/matecconf/201928905002.

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The prevention of corrosion in reinforced concrete structures can be achieved by different means. The aim of this paper is to present the efficiency of corrosion prevention using silane hydrophobic impregnation, through laboratory investigations as well from long term field studies. The laboratory investigation was carried out in Zürich, is based on modified ASTM C109, where the product was applied on cracked concrete beams (before cracking and before corrosion initiation; after cracking and before corrosion initiation and finally after cracking and after corrosion initiation). The long term f

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Przybyszewski, Bartlomiej, Anna Boczkowska, Rafal Kozera, et al. "Hydrophobic and Icephobic Behaviour of Polyurethane-Based Nanocomposite Coatings." Coatings 9, no. 12 (2019): 811. http://dx.doi.org/10.3390/coatings9120811.

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In this paper, hydrophobic nanocomposite coatings based on polyurethane (PUR) modified by nano-silica and silane-based compounds were manufactured by spraying. The main challenge was to assess and improve the hydrophobic as well as anti-icing properties of initially hydrophilic polymer coatings. The prepared nanocomposite coatings were characterized by means of scanning electron microscopy (SEM), optical profilometry and X-ray photoelectron spectroscopy (XPS). The results obtained showed that in order to achieve hydrophobicity, appropriate amounts of nano-silica must be incorporated in the coa

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Wu, Zhong Yuan, Liang Hu, and Jia Xi Chen. "Surface Hydrophobic Modification of T-ZnOw with Silane Coupling Agent." Advanced Materials Research 634-638 (January 2013): 3048–51. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3048.

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Surface hydrophobic modification of T-ZnOw was experimented with silane coupling agent KH-570(gamma-(methylpropyl acyloxy)trimethoxysilane). It was shown by FT-IR that the whiskers was modified by silane coupling agents molecular compounded with the Zn-OH of whiskers. The effect of grafted modification with KH570 on hydrophobicity of T-ZnOw was characterized with dispersion stability test in an organic solvent and measuring the contact angle between the whiskers on distilled water. The results showed that surface treatment of T-ZnOw with KH570 improves hydrophobicity of whiskers simultaneously

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29

Li, Jin, Peiyuan Chen, Haibing Cai, Ying Xu, and Murodjon Rasulov. "Investigation of Silane Impregnation for Protection of Alkali-Activated Slag Mortar." Advances in Materials Science and Engineering 2021 (August 27, 2021): 1–10. http://dx.doi.org/10.1155/2021/9970753.

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This paper investigated the effects of silane impregnation on the protective properties of alkali-activated slag (AAS) mortars. The surface silane impregnation on water absorption, contact angle, and penetration depth were examined. The related protective mechanism regarding silane impregnation was analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier infrared spectroscopy (FT-IR). The results showed that the surface of the AAS mortar after silane impregnation was transformed from hydrophilic to hydrophobic with an increased contact angle of 80° from 36° to 116°.

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Saleemi, Sidra, Samander Ali Malik, Uzma Syed, and Anwaruddin Tanwari. "Investigation of Wash Durability of Silica Nanoparticle Coated 100% Cotton Reactive Dyed Fabric Treated by Sol-Gel Technique." Journal of Engineered Fibers and Fabrics 9, no. 4 (2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900402.

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In this research a hydrophobic surface of 100% cotton woven fabric was developed by sol-gel technique. Fabric samples were dyed with Drimarene Reactive Red 5B and Drimarene Reactive Blue BR dyes (0.5% and 3% o.w.f) and then treated with a combination of silica nanoparticles, silane hydrophobes (alkyltrialkoxysilanes), and silane cross-linkers i.e, tetraethoxysilane (TEOS) and teramethoxysilane (TMOS) by dip-dry-cure process. After coating, wash durability of dyed samples was investigated for water repellency and water uptake according to AATCC standards. The effect of coating on dyeing behavio

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Kim, Jong-Ho, Sayed Mukit Hossain, Hui-Ju Kang, et al. "Hydrophilic/Hydrophobic Silane Grafting on TiO2 Nanoparticles: Photocatalytic Paint for Atmospheric Cleaning." Catalysts 11, no. 2 (2021): 193. http://dx.doi.org/10.3390/catal11020193.

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In this study, anatase titania was utilized to prepare a durable photocatalytic paint with substantially enhanced photoactivity towards NO oxidation. Consequently, to alleviate the choking effect of photocatalytic paint and incorporate self-cleaning properties, the parent anatase titania was modified with Al(OH)3 and a number of organosilane (tetraethyl orthosilicate, propyltrimethoxysilane, triethoxy(octadecyl)silane, and trimethylchlorosilane) coatings. A facile hydrolysis approach in ethanol was employed to coat the parent titania. To facilitate uniform dispersion in photocatalytic paint an

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32

Le Ferrand, Hortense. "Hydrophobic and hydrophilic surfaces hold tight through chemical silane bonds." MRS Bulletin 43, no. 5 (2018): 318. http://dx.doi.org/10.1557/mrs.2018.99.

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De Palma, Randy, Sara Peeters, Margriet J. Van Bael, et al. "Silane Ligand Exchange to Make Hydrophobic Superparamagnetic Nanoparticles Water-Dispersible." Chemistry of Materials 19, no. 7 (2007): 1821–31. http://dx.doi.org/10.1021/cm0628000.

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Miyamoto, Takumi, Munetoshi Sakai, Toshihiro Isobe, Sachiko Matsushita, and Akira Nakajima. "Adhesion and Friction Force on Various Smooth Hydrophobic Silane Coatings." Chemistry Letters 44, no. 5 (2015): 683–84. http://dx.doi.org/10.1246/cl.150018.

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35

Sanders, R. Sean, Ross S. Chow, and Jacob H. Masliyah. "Hydrophobic Interactions in Silane-Treated Silica Suspensions and Bitumen Emulsions." Canadian Journal of Chemical Engineering 81, no. 1 (2008): 43–52. http://dx.doi.org/10.1002/cjce.5450810105.

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36

Zhang, Yong, Fang Fang, Cheng Wang, et al. "Hydrophobic modification of ZnO nanostructures surface using silane coupling agent." Polymer Composites 35, no. 6 (2013): 1204–11. http://dx.doi.org/10.1002/pc.22769.

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37

Manangon-Perugachi, Lucia E., Valentin Smeets, Alvise Vivian, et al. "Mesoporous Methyl-Functionalized Titanosilicate Produced by Aerosol Process for the Catalytic Epoxidation of Olefins." Catalysts 11, no. 2 (2021): 196. http://dx.doi.org/10.3390/catal11020196.

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Titanosilicates (Ti-SiO2) are well-known catalysts for the epoxidation of olefins. Isolated Ti inserted in the silica framework in tetrahedral coordination are the active species. Recently, adjusting the hydrophobic/hydrophilic balance of such catalysts’ surfaces has appeared as a promising tool to further boost their performance. However, adjusting the hydrophobic/hydrophilic balance via a one-pot classical sol-gel generally leads to a decrease in the Ti dispersion and/or collapse of the pore network. To overcome this limitation, hydrophobic mesoporous Ti-SiO2 were here synthesized by aerosol

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Fornazari, IA, I. Wille, EM Meda, RT Brum, and EM Souza. "Effect of Surface Treatment, Silane, and Universal Adhesive on Microshear Bond Strength of Nanofilled Composite Repairs." Operative Dentistry 42, no. 4 (2017): 367–74. http://dx.doi.org/10.2341/16-259-l.

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SUMMARY Purpose: The aim of this study was to evaluate the effect of surface treatment and universal adhesive on the microshear bond strength of nanoparticle composite repairs. Methods: One hundred and forty-four specimens were built with a nanofilled composite (Filtek Supreme Ultra, 3M ESPE). The surfaces of all the specimens were polished with SiC paper and stored in distilled water at 37°C for 14 days. Half of the specimens were then air abraded with Al2O3 particles and cleaned with phosphoric acid. Polished specimens (P) and polished and air-abraded specimens (A), respectively, were random

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Yu, Jiao, Shaochun Li, Dongshuai Hou, Zuquan Jin, and Qing-feng Liu. "Correction: Hydrophobic silane coating films for the inhibition of water ingress into the nanometer pore of calcium silicate hydrate gels." Physical Chemistry Chemical Physics 21, no. 37 (2019): 21166. http://dx.doi.org/10.1039/c9cp90225b.

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Correction for ‘Hydrophobic silane coating films for the inhibition of water ingress into the nanometer pore of calcium silicate hydrate gels’ by Jiao Yu et al., Phys. Chem. Chem. Phys., 2019, DOI: 10.1039/c9cp03266e.

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Luo, Jian Hui, Yuan Yang Li, Ping Mei Wang, et al. "A Facial Route for Preparation of Hydrophobic Nano-Silica Modified by Silane Coupling Agents." Key Engineering Materials 727 (January 2017): 353–58. http://dx.doi.org/10.4028/www.scientific.net/kem.727.353.

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Nano-silica was prepared using tetraethylorthosilicate (TEOS) as precursor by sol-gel technology based on stÖber method. These silica nanoparticals were further modified with silane coupling agents, i.e., Hexadecyltrimethoxysilane (HDTMS), dimethoxydiphenylsilane (DMMPS), to introduce organic functional groups on the surface of SiO2 nanoparticles. The Fourier transform-infrared (FTIR) spectra indicated that these silane coupling agents were anchored on the surface of silica particles. And the obtained organic–inorganic hybrid SiO2 particles showed an improvement in hydrophobicity, which can ef

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Årskog, V., K. Borgund, and Odd E. Gjørv. "Effect of Concrete Hydrophobation against Chloride Penetration." Key Engineering Materials 466 (January 2011): 183–90. http://dx.doi.org/10.4028/www.scientific.net/kem.466.183.

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For concrete structures in chloride containing environments, hydrophobic surface treatments are often used as an additional protective measure for protecting the embedded steel against corrosion. In recent years, silane-based hydrophobic agents that can be used as concrete admixtures for making the whole concrete hydrophobic have also been introduced. In the present paper, the protective effectiveness of such an admixture against chloride penetration has been investigated. For comparison, some field investigations on the effectiveness of a traditional surface hydrophobation of two concrete har

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Formentín, Pilar, and Lluís F. Marsal. "Hydrophobic/Oleophilic Structures Based on MacroPorous Silicon: Effect of Topography and Fluoroalkyl Silane Functionalization on Wettability." Nanomaterials 11, no. 3 (2021): 670. http://dx.doi.org/10.3390/nano11030670.

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The effect of the morphology and chemical composition of a surface on the wettability of porous silicon structures is analyzed in the present work. Hydrophobic and superhydrophobic macroporous substrates are attractive for different potential applications. Herein, different hydrophobic macroporous silicon structures were fabricated by the chemical etching of p-type silicon wafers in a solution based on hydrofluoric acid and coated with a fluoro silane self-assembled monolayer. The surface morphology of the final substrate was characterized using a scanning electron microscope. The wettability

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Szafraniec, Małgorzata, Danuta Barnat-Hunek, Małgorzata Grzegorczyk-Frańczak, and Maciej Trochonowicz. "Surface Modification of Lightweight Mortars by Nanopolymers to Improve Their Water-Repellency and Durability." Materials 13, no. 6 (2020): 1350. http://dx.doi.org/10.3390/ma13061350.

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The paper explores the possibility of covering the mortar with the lightweight aggregate by the nanopolymer silane and siloxane as surface hydrophobisation. The investigation involved the mortars with two types of hydrophobic agents diluted with water in a ratio of 1:4 and 1:8. Mortar wetting properties were determined by measuring the absorbability, water vapor diffusion, contact angle (CA) and surface free energy (SFE) of their structure. Surface micro-roughness and 2D topography were evaluated. Scanning electron microscopy (SEM) has shown the microstructure and distribution of pores in mort

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Ross, Pablo, Germán Escobar, Guillermo Sevilla, and Javier Quagliano. "Micro and nanocomposites of polybutadienebased polyurethane liners with mineral fillers and nanoclay: thermal and mechanical properties." Open Chemistry 15, no. 1 (2017): 46–52. http://dx.doi.org/10.1515/chem-2017-0006.

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AbstractMicro and nanocomposites of hydroxyl terminated polybutadiene (HTPB)-based polyurethanes (NPU) were obtained using five mineral fillers and Cloisite 20A nanoclay, respectively. Samples were prepared by the reaction of HTPB polyol and toluene diisocyanate (TDI), and the chain was further extended with glyceryl monoricinoleate to produce the final elastomeric polyurethanes. Mechanical and thermal properties were studied, showing that mineral fillers (20%w/w) significantly increased tensile strength, in particular nanoclay (at 5% w/w). When nanoclay-polymer dispersion was modified with a

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Figueroa, Manuel A., Jennifer D. Schablik, Madison Mastroberte, Lovejot Singh, and Gary H. Dickinson. "The Effect of Hydrophobic Alkyl Silane Self-Assembled Monolayers on Adult Barnacle Adhesion." Marine Technology Society Journal 51, no. 2 (2017): 39–48. http://dx.doi.org/10.4031/mtsj.51.2.4.

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AbstractAlthough there exists a wide range of nonbiocidal and environmentally friendly surface coatings to reduce biofouling on marine structures, there is still not a fundamental understanding of barnacle adhesion upon reattachment. The purpose of this study is to assess the effect of hydrophobicity on adhesion in the barnacle Amphibalanus amphitrite, an abundant and widespread biofouler. Self-assembled monolayers were made on glass slides from alkyl silanes with methylated and fluorinated terminal groups to produce hydrophobic surfaces. Coated and uncoated glass slides underwent a 2-week bar

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SIY, BRENT SPENCER C., JOHN ALFRED XAVIER C. TAN, KIMBERLY P. VIRON, NORMIE JEAN B. SAJOR, GIL NONATO C. SANTOS, and DAVID P. PENALOZA JR. "APPLICATION OF SILANE COUPLING AGENTS TO ABACA FIBERS FOR HYDROPHOBIC MODIFICATION." Cellulose Chemistry and Technology 54, no. 3-4 (2020): 365–69. http://dx.doi.org/10.35812/cellulosechemtechnol.2020.54.37.

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Huang, Haiming, Weiliang Wang, and Liming Wang. "Theoretical assessment of wettability on silane coatings: from hydrophilic to hydrophobic." Physical Chemistry Chemical Physics 21, no. 16 (2019): 8257–63. http://dx.doi.org/10.1039/c9cp01232j.

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The potential distribution and work function of a graphene surface modified by various types of silanes are investigated by first principles quantum mechanical calculations to establish its surface hydrophobicity hierarchy.

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Rodriguez, C., P. Laplace, D. Gallach-Pérez, et al. "Hydrophobic perfluoro-silane functionalization of porous silicon photoluminescent films and particles." Applied Surface Science 380 (September 2016): 243–48. http://dx.doi.org/10.1016/j.apsusc.2016.01.119.

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Herb, Hartmut, Andreas Gerdes, and Gerald Brenner-Weiß. "Characterization of silane-based hydrophobic admixtures in concrete using TOF-MS." Cement and Concrete Research 70 (April 2015): 77–82. http://dx.doi.org/10.1016/j.cemconres.2015.01.008.

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Yang, Ping, Aiyu Zhang, Masanori Ando, and Norio Murase. "Multiple hydrophobic QDs assembled in SiO2 particles using silane coupling agent." Colloids and Surfaces A: Physicochemical and Engineering Aspects 397 (March 2012): 92–98. http://dx.doi.org/10.1016/j.colsurfa.2012.01.039.

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