聚丙烯酸丁酯/二氧化钛杂化薄膜的制备、表征及紫外吸收性能  

Preparation,characterization and ultraviolet absorption property of poly(butyl acrylate)/titanium dioxide hybrid film

作　　者：陈钱宝[1] 史铁钧[1] 梅晓君[1] 

机构地区：[1]合肥工业大学化学工程学院,安徽合肥230009

出　　处：《合成橡胶工业》2011年第2期120-124,共5页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(20174007)

摘　　要：以钛酸正四丁酯、γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷(KH-570)为原料,经水解缩合得到KH-570-g-TiO2粒子;再以KH-570-g-TiO2为种子,丙烯酸丁酯为壳单体,采用乳液聚合法制备核壳型聚丙烯酸丁酯(PBA)/TiO2杂化乳液,并将其制备成薄膜,对产物结构和性能进行了表征。结果表明,KH-570水解生成的硅羟基与纳米TiO2表面的羟基发生了缩合反应,丙烯酸丁酯在KH-570-g-TiO2粒子表面实现了接枝聚合;PBA/TiO2杂化物的热分解温度为99.7℃,仅有1个玻璃化转变,其玻璃化转变温度为5℃,有机/无机相之间具有较好的相容性;PBA接枝层包覆纳米TiO2呈均匀的微球形,纳米TiO2核的平均粒径为60 nm,PBA壳的平均厚度为40 nm;与纯PBA薄膜相比,PBA/TiO2杂化薄膜在紫外区有明显吸收,且吸收谱带红移。KH-570-g-TiO2 particles were synthesized by hydrolysis condensation with [ 3-（ methacryloxy） propyl ] trimethoxysilane （ KH-570 ） and tetran-butyl titanate as materials. Core-shell structure poly（butyl acrylate） （PBA）/TiO2 hybrid latex was prepared by emulsion polymerization with KH-570-g- TiO2 as seeds and butyl acrylate（BA） as the monomer of shell. The hybrid film was prepared on a glass substrate, and the structure and properties of the film were characterized. The results showed that the condensation reaction occurred between the hydroxyl group formed from the hydrolysis of KH-570 and the one on the TiO2 surface, meanwhile BA were graft-polymerized onto the surface of KH-570-g-TiO2 particles. The thermal decomposition temperature and glass transition temperature of hybrid films was 99.7 ℃ , 5 ℃ respectively, and the compatibility between organic and inorganic phases was better. The TiO2 nanoparticles wrapped by PBA grafted layer appeared as even microspheres. The average particle size of TiO2 core was 60 nm, and the average thickness of PBA shell was 40 nm. Compared to PBA film, the PBA/TiO2 hybrid film had more intensive absorptions in ultraviolet region, and its absorption bands were red shifted.

关 键 词：聚丙烯酸丁酯 二氧化钛溶胶 乳液聚合 接枝 核壳结构 红移 紫外吸收性能 

分 类 号：TB383.2[一般工业技术—材料科学与工程]