Surface Hydrophobic Modification of T-ZnOw with Silane Coupling Agent

2013 ◽  
Vol 634-638 ◽  
pp. 3048-3051
Author(s):  
Zhong Yuan Wu ◽  
Liang Hu ◽  
Jia Xi Chen
Keyword(s):  
Contact Angle ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Liquid Paraffin ◽  
Distilled Water ◽  
Hydrophobic Modification ◽  
Silane Coupling Agents ◽  
Silane Coupling ◽  
Ft Ir ◽  
Settling Rates

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, and the modified whiskers have much slower settling rates than the pristine whiskers in the liquid paraffin. The contact angle between the modified whiskers with distilled water is 137.75 degrees, which is a significant increase.

Surface Functionalization of Zirconia Nanocrystals with Silane Coupling Agent and its Dispersion Behavior in O-Phenylphenoxyethyl Acrylate

2018 ◽  
Vol 922 ◽  
pp. 20-25 ◽  
Author(s):  
Hee Seon Lee ◽  
Jeong Min Park ◽  
Kyu Hong Hwang ◽  
Hyung Mi Lim
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Coupling Agents ◽  
Solvothermal Reaction ◽  
Silane Coupling Agents ◽  
Propyl Methacrylate ◽  
Silane Coupling ◽  
Ft Ir ◽  
Surface Modified ◽  
Dispersion Of Nanoparticles

Highly crystalline and dispersible zirconia, synthesized by solvothermal reaction of zirconium (IV) isopropoxide isopropanol complex in benzyl alcohol, were functionalized with silane coupling agent and dispersed with o-phenylphenoxyethyl acrylate (OPPEA). Silane coupling agents such as 3-aminopropyltriethoxysilane (APTES) of amino functional silane, decyltrimethoxysilane (DTMS) of alkyl functional silane and 3-(trimethoxysilyl) propyl methacrylate (MPS) of acrylate functional silane have been used to modify nanoparticle surfaces and obtain dispersion of nanoparticles within OPPEA. The surface modified zirconia was compared according to silane coupling agent, FT-IR and TGA demonstrated that APTES, DMTS and MPS are chemically attached to the surface of the zirconia. The MPS-zirconia is dispersed as about 5 nm sized, whereas the APTES-zirconia, DTMS-zirconia are agglomerated. The MPS-zirconia/tetrahydrofuran (THF) sol at 15wt% loading shows high transmittance of 68 % at 550 cm-1 and the 50wt% surface modified-zirconia/OPPEA sol show refractive index of 1.657.

scholarly journals X-Ray Photoelectron Spectroscopy Study of Silane Coupling Agents/Basalt Fiber Interface

2011 ◽  
Vol 236-238 ◽  
pp. 1467-1471 ◽  
Author(s):  
Ya Lan Liu ◽  
Shi Jie Shen ◽  
Li Zhang ◽  
Ling Min Shao
Keyword(s):  
Coupling Agent ◽  
Photoelectron Spectroscopy ◽  
Silane Coupling Agent ◽  
Basalt Fiber ◽  
Fiber Surface ◽  
Chemical Compositions ◽  
Hydroxyl Groups ◽  
Silane Coupling Agents ◽  
X Ray ◽  
Silane Coupling

In this paper, two types of fiber surface treatment methods, namely heat treatment and chemical coupling, were used to improve the basalt fiber surface properties. The basalt fiber surface was heated under 250Celsius degree for 30minites, and then was treated by silane coupling agent ethanol solution with different concentrations. X-ray photoelectron spectroscopy (XPS) was utilized to study the surface chemical compositions of basalt fiber after treatments. The XPS analysis indicated that chemical bonds between basalt fiber and KH-550 have occurred, and silanols were adsorbed to the surface of basalt fibers by an ether linkage between the silanols and the hydroxyl groups of the fibers. When the concentration of KH-550 is 0.8wt%, the optimal bonding condition is formed between basalt fiber and silane coupling agent.

scholarly journals Comparison of Surface Modification Methods for Improving the Compatibility of Recycled Plastic Film-Based Aggregates

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3956
Author(s):  
Jea Uk Lee ◽  
Jin-Yong Hong
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Coupling Agent ◽  
Atmospheric Pressure ◽  
Silane Coupling Agent ◽  
Atmospheric Pressure Plasma ◽  
Ozone Treatment ◽  
Plastic Film ◽  
Pressure Plasma ◽  
Silane Coupling

The surface modification of recycled plastic film-based aggregates was investigated to improve the compatibility between the aggregates and a cement paste. Surface modification was performed using ultraviolet–ozone treatment (UV-O3), a silane coupling agent, O2 atmospheric pressure plasma, and acrylic binder coating methods. The surface properties of the modified aggregates were analyzed using a contact angle measuring instrument. The results revealed that for all surface modification methods, the contact angle decreased with an increase in the treatment time. According to the comparative evaluation results of the changes in the surface characteristics of the aggregates through various surface modification methods, the contact angle reduction rates were 58.9%, 51.4%, 25.5%, and 24.5% for the O2 atmospheric pressure plasma, the acrylic binder coating, the silane coupling agent, and the UV-O3 method, respectively. After 48 h, the contact angle had increased by 110.9%, 29.9%, 16.4%, and 5.9% for the O2 atmospheric pressure plasma, UV-O3, the silane coupling agent, and the acrylic binder coating, respectively. Namely, the surface modification using the acrylic binder coating method was found to be the most effective method in terms of the wettability increase effect and the long-term storage stability.

Design of Experiment: A Statistical Approach to Understanding Factors Influencing Surface Properties of Sol-Gel Based Non-Stick Ceramic Coatings

2012 ◽  
Vol 622-623 ◽  
pp. 420-425
Author(s):  
Alex Kwasi Kumi ◽  
Allan Chelashaw ◽  
Yu Mei Zhang ◽  
Li Feng Li
Keyword(s):  
Contact Angle ◽  
Surface Properties ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Sol Gel ◽  
Ceramic Coatings ◽  
Curing Temperature ◽  
Factors Influencing ◽  
Silane Coupling ◽  
Advancing Contact Angle

Ceramic coatings based on sol-gel method have increasingly gained much attention in recent times. In order to ascertain important experimental factors (variables) influencing surface properties, such as adhesion, pencil hardness and advancing contact angle (non-stick) of sol coatings, a 26-1-factorial screening design with six experimental variables, precursor mole ratio, low surface energy polymer concentration, silane coupling agent (SCA) concentration, silica nanoparticles concentration (SNP’s),curing temperature and three responses ( surface properties) were investigated. The results indicate that silane coupling agent concentration, SNP’s concentration and their interaction were the most significant experimental factors influencing advancing contact angle. None of the experimental factors studied were statistically significant with respect to hardness and adhesion.

scholarly journals Reinforcing Behaviors of Sulfur-Containing Silane Coupling Agent in Natural Rubber-Based Magnetorheological Elastomers with Various Vulcanization Systems

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5163
Author(s):  
Mengxin Wang ◽  
Xiaoqian Hao ◽  
Wenju Wang
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Magnetic Particles ◽  
Surface Hydrophobicity ◽  
Zero Magnetic Field ◽  
Rubber Matrix ◽  
Silane Coupling Agents ◽  
Magnetorheological Elastomers ◽  
Inorganic Particles ◽  
Silane Coupling

Magnetorheological elastomers (MRE) is known as an intelligent material constituted of a rubber matrix as well as soft magnetic particles. Silane coupling agents are used to raise the interplay between the inorganic particles and rubber matrix. Silane coupling agent, bis-[-3-(trimethylsilyl propyl)tetra sulfide] (Si69), was picked for comparison of its reinforcing efficiency in the MRE with various vulcanization systems: a conventional (CV), semi-efficient (semi-EV), and efficient (EV) vulcanization system. The outcome illustrated that not only was there improved Si69 surface hydrophobicity of the magnetic particles, but also enhanced Si69 in the interplay between the rubber matrix and magnetic particles. On one hand, the saturated induced magnetic modulus and zero magnetic field modulus of MRE was increased in the vulcanization system, and the loss factor was reduced after the magnetic particles were modified by Si69. On the other hand, the effect of Si69 on the MRE depended on the vulcanization system. The Si69 provided better enhancements in the EV system due to effects of the sulfur contribution of Si69.

Surface Hydrophilic Modification of Polypropylene Fiber by Hydrolysis of Silane Coupling Agent

2018 ◽  
Vol 779 ◽  
pp. 80-85
Author(s):  
Yi Wei Fei ◽  
Jun Ma ◽  
Shian Sun ◽  
Li Ping Tong ◽  
Hong Ming Liu
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Polypropylene Fiber ◽  
Hydrophobic Surface ◽  
Interface Bonding ◽  
Hydrophilic Modification ◽  
Modification Process ◽  
Silane Coupling ◽  
Ft Ir ◽  
Hydrolysis Of

Silane coupling agent is applied to modify polypropylene fiber. The modification effectively transfers the hydrophobic surface of polypropylene fiber to hydrophilic surface. Results from FT-IR, SEM and contact angle meter suggest that that the surface functional groups, the morphology and hydrophilia of polypropylene fiber is changed during the hydrolysis reactions of silane coupling agent. The modification process not only improve the surface hydrophilia of polypropylene fiber, but also convert the smooth surface of unmodified fibers to rough surface of modified fibers which gives stronger interface bonding force between fiber and substrate in the field of composite applications.

Hydrophobic modification of ZnO nanostructures surface using silane coupling agent

2013 ◽  
Vol 35 (6) ◽  
pp. 1204-1211 ◽  
Author(s):  
Yong Zhang ◽  
Fang Fang ◽  
Cheng Wang ◽  
Lidan Wang ◽  
Xujie Wang ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Zno Nanostructures ◽  
Hydrophobic Modification ◽  
Silane Coupling

Study on UV-protection and hydrophobic properties of cotton fabric functionalized by graphene oxide and silane coupling agent

2019 ◽  
Vol 48 (3) ◽  
pp. 237-242 ◽  
Author(s):  
Feilong Shi ◽  
Jia Xu ◽  
Zhanzhu Zhang
Keyword(s):  
Contact Angle ◽  
Graphene Oxide ◽  
Cotton Fabric ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Uv Protection ◽  
Curing Temperature ◽  
Hydrophobic Properties ◽  
Content Type ◽  
Silane Coupling

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 variable experiment and orthogonal experiment, The UVA and UVB transmittances in ultraviolet light of the sample fabric were characterized, and the contact angle test method with water was used to indicate the hydrophobicity of the sample fabric. The structure and surface of the fabric were analyzed using Fourier-transform infrared spectroscopy and scanning electron microscopy. Findings The cotton fabric was successfully modified by graphene oxide and silane coupling agent KH570. Compared with the untreated fabric, the surface of the fabric was smooth, and there was no gap on the fiber. The graphene oxide, silane coupling agent KH570 and cotton fabric combined tightly. The UPF value of the modified fabric was 50+, and the contact angle reached 138.1°. It had excellent UV protection and hydrophobic properties. Research limitations/implications Although graphene oxide and silane coupling agents KH570 had successfully endowed the cotton fabric with good UV protection and hydrophobic properties, graphene oxide and silane coupling agent KH570 are expensive and used in large quantities. There are certain limitations in the actual life and production process. Practical implications After treating with silane coupling agent, the hydrophilic fabric treated with graphene oxide is being translated into hydrophobic, and graphene oxide bonded with cotton. The modified fabrics also have excellent UV protection. This fabric can be used for outdoor sports such as clothes and tents. Originality/value Cotton fabric treated with graphene oxide generally by simple dip-dry-cure method is hydrophilic and graphene oxide is easy to drop. The usage of silane coupling agent KH570 as a crosslinking agent to link graphene oxide and cotton fibers has not been reported yet. The modified fabrics have both UV protection and hydrophobic properties.

Study on the Modified Effect of Wood Fiber by Silane Coupling Agent

2011 ◽  
Vol 55-57 ◽  
pp. 388-391
Author(s):  
Xin Gong Li ◽  
Xia Zheng ◽  
Yi Qiang Wu
Keyword(s):  
Polylactic Acid ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Liquid Paraffin ◽  
Wood Fiber ◽  
Mixed System ◽  
Viscosity Characteristic ◽  
Modification Effect ◽  
Silane Coupling

In order to improve the interface compatibility of wood fiber and the polylactic acid (PLA), the silane coupling agent to modify the wood fiber was chosen. The Modified Effect of silane coupling agent on the wood fiber is judged inrectly by feat of the modification of viscosity characteristic of the mixed system of wood fiber and the liquid paraffin. The dosage of the silane coupling agent influenced the modification effect the most is shown in the research, the modification temperature, stirring speed and the modification time are followed.

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