透明疏水涂层的制备与应用研究

Synthesis and Application of Transparent Water-repellent Coating

摘要:

以γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH570）为改性剂，正硅酸乙酯（TEOS）为水解前躯体，采用溶胶-凝胶法制备乙烯基改性纳米硅溶胶（VS），再将其与含氟氢硅油（FPHMS）和全氟辛基乙烯（vi-F17）进行硅氢化加成反应制得纳米杂化氟硅疏水树脂（FSi-1）。采用涂覆法在玻璃表面产生疏水透明涂层。通过红外光谱（FT-IR）、透射电镜（TEM）、热重分析（TGA）、原子力显微镜（AFM）和静态角接触测量仪（WCA）等手段对产物的组成结构及性能进行研究，并探讨了VS的加入对涂层性能的影响。结果表明：VS在微观上表现出多相分离的微球结构，分散均一，且添加量为10%时，FSi-1体系稳定。当FSi-1的含量为0.5%时，涂层透光性基本不受影响，涂层硬度为5H，静态接触角可达120.5°，且耐摩擦次数达到1000次时，仍具疏水效果。

Abstract:

Fluorosilicone water-repellent fluorosilicone resin (FSi-1) was synthesized by the hydrosilylation with Fluorine-containing and hydrogen-containing polysiloxane(FPHMS), perfluorooctane ethylene(vi-F17) and vinyl modified nano-silica sol(VS) which were prepared from γ-Methacryloxypropyl trimethoxysilane(KH570) as modifier and tetraethoxysilane(TEOS) as hydrolysis precursor by sol-gel method. The coating method was used on hydrophobic coating application. Through FT-IR, TEM, TGA, AFM and WCA measurment, the characterizations of products were detereminded. In additon, the influence of the addition of adding VS on the properties of the coating was also discussed. The results demonstrated that on the surface of coatings showed a large amount of nano-convex which distributing evenly, and the addition of VS is 10%, FSi-1 system is stable. As the FSi-1 content was 0.5%, the light transmittance is not affected. Moreover, The coating hardness is 5H. the WAC increased to 120.5˚ and the rub-bing fastness test pointed that the coating could keep good hydrophobic capitity after rub over 1000 times after modifier VS was added.