Synthesis and photo-responsive behaviors of hollow polyazobenzene micro-spheres

作     者：WANG XiaoTao YANG YingKui YANG ZhiFang LIAO YongGui ZHANG Wei XIE XiaoLin 

作者机构：State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China Faculty of Materials Science and Engineering Hubei University Wuhan 430062 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2010年第55卷第30期

页      面：3441-3447页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 082701[工学-核能科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：supported by the Outstanding Youth Fund of the National Natural Science Foundation of China (50825301) Open Fund of State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology of HUST 

主　　题：空心微球 光响应 甲基丙烯酸甲酯 行为 合成 二乙烯基苯 顺反异构化 偶氮苯 

摘      要：By means of distillation precipitation polymerization,the silica-hybrid particles with polyazobenzene shell (PAzo@SiO2) microspheres were prepared with 6-(4-methoxy-4 -oxy-azobenzene) hexyl methacrylate (Azo-M) as monomer,divinylbenzene (DVB) as cross-linker,and ～250 nm vinylated sol-gel silica particles as template. Hollow polyazobenzene microspheres were further developed after selective removal of the silica cores with HF solution. When the content of DVB related to Azo-M is 20 wt%,the acetonitrile is 200 mL,and the polymerization time is 4.5 h,the hollow PAzo microspheres with about 20 nm shell are successfully fabricated. These hollow PAzo microspheres have excellent reversible photoisomerization,and their first-order rate constant of trans-cis isomerization only decreases 11.8% compared with homopolymer of azobenzene (Homo-PAzo).