摘要
以三氟丙基甲基环三硅氧烷(D3F)、二甲基氯硅烷、甲基二氯硅烷、乙烯基三甲氧基硅烷(VTMS)为主要原料,通过阴离子开环聚合和硅氢加成反应合成了一系列短氟碳链含氟硅烷偶联剂。载玻片表面经纳米二氧化硅溶胶涂膜和硅烷偶联剂表面修饰得到疏水涂层。探究了不同硅烷偶联剂对于涂层疏水性、附着力、硬度、透过率等性能的影响。结果表明,同类型含氟硅烷偶联剂中氟含量越大,其修饰的涂层接触角越大;相似相对分子质量及氟含量情况下,直链型含氟硅烷偶联剂修饰的涂层疏水性优于支链型修饰的涂层。经含氟硅烷偶联剂修饰的疏水涂层中,接触角最大的是由聚合度为9的支链型含氟硅烷偶联剂(DF3)修饰的涂层,可达141.6°。疏水涂层的附着力均达1级,硬度均达H,可见光透过率高于82.9%,具有良好的自清洁性能。
A series of fluoride-containing silane coupling agents with short fluorocarbon chains were synthesized via anionic ring-opening polymerization and hydrosilylation reaction using trifluoropropylmethylcyclotrisiloxane(D3F),dimethylchlorosilane,methyldichlorosilane and vinyltrimethoxysilane(VTMS)as raw materials.The surface of the glass slide was coated by nano-silica sol via spin-coating method.Then,the coating was modified by silane coupling agents to obtain hydrophobic coatings.The effects of different silane coupling agents on the hydrophobicity,adhesion,hardness and transmittance of coatings were investigated.The results showed that for the same type fluoride-containing silane coupling agents,the higher the content of fluorine,the higher the contact angle of the modified coating.For the fluoride-containing silane coupling agents with similar molecular mass and fluorine content,the hydrophobicity of the coating modified by linear type fluorosilane coupling agent was better than that modified by branched chain type fluorosilane coupling agent.Among the coatings modified by the prepared fluoride-containing silane coupling agents,the coating modified by the branched type with a degree of polymerization of 9(DF3)showed the biggest contact angle,about 141.6°.The adhesion level of the hydrophobic coatings in all cases reached to level 1 and the hardness reached to H,while the visible light transmittance was above 82.9%.In addition,the hydrophobic coatings had good self-cleaning properties.
作者
金大钺
张先伟
范宏
Bittencourt Carla
Dubois Philippe
Jin Dayue;Zhang Xianwei;Fan Hong;Bittencourt Carla;Dubois Philippe(State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Center of Innovation and Research in Materials and Polymers(CIRMAP),University of Mons,B-7000 Mons,Belgium)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2020年第2期412-419,432,共9页
Fine Chemicals
基金
国家重点研发计划(2017YFE0116000).
关键词
含氟硅烷偶联剂
疏水涂层
溶胶凝胶法
自清洁
建筑用化学品
fluoride-containing silane coupling agents
hydrophobic coating
sol-gel method
self-cleaning
building chemicals
作者简介
金大钺(1993—),男,硕士生;联系人:范宏(1963—),男,教授,E-mail:hfan@zju.edu.cn。
