光驱动液晶/超高分子量聚乙烯复合纤维的研究

项目名称： 光驱动液晶/超高分子量聚乙烯复合纤维的研究

项目编号： No.51303007

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 余黎

作者单位： 北京大学

项目金额： 25万元

中文摘要： 本项目拟以液晶聚合物为掺杂剂，超高分子量聚乙烯为聚合物基体，结合湿法纺丝和辐照交联的方法制备具有可逆形变的光驱动液晶/超高分子量聚乙烯复合纤维。通过研究复合纤维中液晶聚合物的含量、取向程度和辐照之后的交联密度与光驱动性能之间的关系，探讨其光驱动机理。在此基础上，以复合纤维为基材，通过纺织技术设计制备具有多畴取向的光驱动材料，赋予其多种多样的运动方式和功能。本项目可望为新型光驱动材料的设计、研究与应用提供新的思路，具有重要的科学意义。

中文关键词： 光驱动；液晶聚合物；复合纤维；湿法纺丝；辐照交联

英文摘要： In this project, liquid crystal polymer/ultrahigh molecular-weight polyethylene (UHMWPE) composite fibers, in which liquid crystal polymer acts as the dopant and UHMWPE as the matrix, are prepared by elegant combination of wet spinning and radiation-induced chemical crosslinking. Their reversible photo-driven deformation will be studied upon photo-irradiation. The mechanism will be explored by investigating the relationship between photo-driven performance and the content and orientation of liquid crystal polymer and crosslinked density in composite fibers. Then, photo-driven materials with multi-domain alignment of mesogens are designed and synthesized by textile technology, which should endow divers of exotic movements and novel functions to photo-driven materials composed of composite fibers. Thus, this project is beneficial to providing a new explication for the design fabrication and applications of novel photo-driven materials and of great scientific significance.

英文关键词： photo-driven；liquid crystal polymer；composite fiber；wet spinning；radiation-induced chemical crosslinking