氟硅防指纹透明涂层的构建及性能

Constrution and Properties of Fluorosilicone Anti-fingerprint Transparent Coating

摘要:

摘要：以三氟丙基甲基环三硅氧烷(D3F) 、四甲基四乙烯基环四硅氧烷(D4vi)和六甲基二硅氧烷(MM)为原料，经开环聚合反应制得三氟丙基乙烯基硅油(FVSA)，FVSA与三甲氧基氢硅烷(TMS)进行硅氢化加成反应制得烷氧基改性含氟聚硅氧烷(FVT)；FVT与正硅酸乙酯(TEOS)、全氟辛基三甲氧基硅烷(POTS)进行分步水解缩聚，得到一种纳米改性氟硅树脂(FVT-SiO2)，并以FVT-SiO2 为成膜物质，制备了防指纹透明涂层。用FTIR、AFM、SEM等对产物的结构、形貌及性能进行了测试与表征，讨论了分步水解反应条件对涂层接触角的影响。结果表明：待FVT与TEOS先反应2h，再加入POTS进行分步反应,得到粒径约150nm，分散均匀的球状FVT-SiO2且w(FVT-SiO2)=2%、浸涂层数为3层时，得到涂层透明性良好、附着力强且疏水疏油性最佳，其水和油的接触角分别达到了138.5°、109°。

Abstract:

Abstract: The trifluoropropyl vinyl silicone oil (FVSA) was prepared by ring-opening reaction from 1,3,5-tris(3,3,3-trifluoropropyl)methylcyclotrisiloxane(D3F), tetramethylcyclotetrasiloxane (D4vi) and hexamethyldisiloxane(MM). Alkoxy modified fluorinated polysiloxane (FVT) was prepared by hydrosilylation addition with trimethoxysilane (TMS) and (FVSA).The nano-modified fluorosilicone resin (FVT-SiO2) was obtained via fractional hydrolysis and polycondensation with FVT, tetraethyl orthosilicate (TEOS) and 1H,1H,2H,2H-perfluorooctyltrimethoxysilane (POTS). The transparent anti-fingerprint coating was prepared with FVT-SiO2 as a film forming material. The structure, morphology and performance of the products were characterized by FTIR, AFM and SEM, and the influence of reaction conditions of fractional hydrolysis on the contact angle of coating was discussed. The results showed that: after FVT and TEOS were reacted in 2h, the POTS was added to the further fractional reactions, and the spherical FVT-SiO2 were obtained which dispersed homogeneously with diameter approximately 150nm. Moreover, when the mass concentration of treating solution of FVT-SiO2 was 2wt% and the number of layers was 3, the coating showed optimal transparency, adhesion , hydrophobicity and oleophobicity. The water and oil contact angles reached 138.5°and 109°, respectively.