光响应液晶嵌段共聚物研究进展

Progress in photoresponsive liquid-crystalline block copolymer

光响应液晶嵌段共聚物综合了光响应性液晶和嵌段聚合物两类材料的优异特性,是一种多功能性的新型材料。其中以偶氮苯为代表的光响应基团作为液晶基元的嵌段共聚物是其目前研究的主体。本文对光响应液晶材料和嵌段聚合物分别做了简要介绍,阐述了它们各自的优势和特点。对于光响应液晶嵌段共聚物的光响应机理、相分离过程和有序化调控手段进行了重点探讨。在此基础上,介绍了其在光子学、有机纳米模板和聚合物胶束等方面的研究进展。

Photoresponsive liquid-crystalline block copolymers are a kind of block copolymer containing photoresponsive liquid crystalline moities.As a novel kind of functional material,they combine the characteristics of photoresponsive liquid crystals and block copolymers.The research in this field mainly focus on azobenzene-containing liquid-crystalline block copolymers.In this paper,the photoresponsiveness of liquid crystalline materials and the microphase separation of block copolymers are briefly introduced.Then the mechanism of photoresponsive feature,the process of microphase separation and their regulation are explained in detail.Finally,potential applications in photonics,nanotemplates,nanoparticle arrangement and micelles are also discussed.