偶氮苯液晶嵌段共聚物薄膜自组装和光响应性研究进展  

Progress in Self-assembly and Photo-responsiveness of Thin Films of Azobenzene-Based Liquid Crystalline Block Copolymers

作　　者：罗龙飞 李玉洁 沈志豪[1] 郑世军[2] 范星河[1] LUO Long-Fei;LI Yu-Jie;SHEN Zhi-Hao;ZHENG Shi-Jun;FAN Xing-He(Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,Center for Soft Matter Science and Engineering,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China;College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]北京分子科学国家研究中心高分子化学与物理教育部重点实验室,北京大学软物质科学与工程中心北京大学化学与分子工程学院,北京100871 [2]郑州大学材料科学与工程学院,郑州450000

出　　处：《应用化学》2021年第10期1238-1254,共17页Chinese Journal of Applied Chemistry

基　　金：国家重点研发计划(No.2018YFB0703702);国家自然科学基金(Nos.51725301,51921002)资助。

摘　　要：偶氮苯液晶嵌段共聚物(LCBCP)是指分子中含有偶氮苯液晶高分子的一类嵌段共聚物(BCP)。偶氮苯LCBCP因结合了BCP微相分离的特性、液晶高分子的液晶相结构以及偶氮苯基元的光响应性,在纳米技术、信息存储以及光子学等领域备受研究者的关注。本文概述了近年来偶氮苯LCBCP薄膜自组装及光响应性的研究进展,阐述了排除体积效应和聚合物的表面偏析原理及其对偶氮苯LCBCP薄膜组装结构的影响,介绍了不同光源类型,包括线偏振光、紫外光以及非偏振光,对偶氮苯LCBCP薄膜组装结构的光调控,并简要介绍了偶氮苯LCBCP薄膜的功能化应用。此外,本文还讨论了现阶段偶氮苯LCBCP薄膜自组装研究方面的挑战,并对未来的研究前景进行了展望。As a type of block copolymers(BCPs)containing an azobenzene-containing liquid crystalline(LC)block,azobenzene-based LC BCPs(LCBCPs),have attracted the attention of researchers in the fields of nanotechnology,information storage,and photonics,owing to the combination of the microphase separation of BCPs,the ordered LC structures of LC polymers,and the photo-responsiveness of azobenzene mesogens.In this review,the recent research progresses in self-assembly and photo-responsiveness of thin films of azobenzene-based LCBCPs are summarized.The principles of the excluded volume effect and the surface segregation are introduced.In addition,the influences of the excluded volume effect and the surface segregation on the self-assembled structures and the photo-induced orientation of azobenzene-based LCBCP films are also discussed.The light regulation with different light sources,including linearly polarized light,ultraviolet(UV)light and unpolarized light,on the self-assembled structures of azobenzene-based LCBCPs are described.In addition,the functional applications of azobenzene-based LCBCP films are also briefly introduced.Then,the challenges of current research on the self-assembly of thin films of azobenzene-based LCBCPs are discussed.Finally,the future research prospects of azobenzene-based LCBCPs are proposed.

关 键 词：偶氮苯液晶高分子 光响应性 嵌段共聚物 薄膜自组装 排除体积效应 表面偏析 功能化应用 

分 类 号：O631[理学—高分子化学]