氟硅改性丙烯酸酯有机/无机杂化无皂乳液制备及性能表征

摘要

Organic/inorganic fluorinated and siloxane acrylates soap-free emulsion was prepared by the organic/inorganic hybrid polymerization.With tetraethyl orthosilicate（TEOS） and γ-methacryloxy propyl trimethoxysilane（KH570） as silicon monomers,2-（perfluoroalkyl）ethyl acrylate（FM） as fluorine monomer.FT-IR results indicate that TEOS has hydrolied into SiO2,the acrilyic ester molecules,fluoro agent and silicon sol have participated in the copolymerization.The morphology structure of latex particles were characterized by TEM and AFM,the results indicate that the latex particles are well-distributed,the roughness and density have greatly improved.The DLS analysis shows the average particle size is about 49.49nm.The CA results illustrate that the add of FM,silicon sol and KH570 have significantly improved the waterproof property of the coatings.%以正硅酸乙酯（TEOS）为水解前驱体制得二氧化硅（SiO2）,并通过硅烷偶联剂（KH570）表面改性后,与全氟烷基乙基丙烯酸酯（FM））等乙烯基单体聚合,通过无皂乳液聚合方法制备了氟硅改性丙烯酸酯有机/无机杂化无皂乳液。FT-IR分析表明,TEOS水解为SiO2,并与丙烯酸酯单体、氟单体参与了共聚反应;采用TEM及AFM对乳胶粒的形态结构进行表征,发现乳胶粒分布较为均一,平均粗糙度和致密程度较高;DLS分析表明乳液平均粒径为49.49nm;接触角测试表明氟单体、硅溶胶及KH570的加入显著提高了涂膜的防水性。