纤维素纳米晶手性模板的研究进展

Progress of study on cellulose nanocrystals as chiral templates

纤维素纳米晶(CNC)是由酸水解天然纤维素制得的具有高结晶度的一种纳米材料,CNC通过蒸发诱导自组装(EISA)能形成具有手性向列液晶相的虹彩薄膜。CNC制备工艺简单,具有生物可持续性和固有的手性向列结构,CNC的手性向列结构表现出特有的光学特性,以CNC为手性模板与聚合物或无机材料共组装可制得先进光学材料,在传感器、光电器件和智能显示等领域具有广阔的应用前景。本文介绍了CNC的制备、手性向列结构的形成及其作为模板的研究,简要综述了近年来CNC在制备有序介孔材料、功能纳米复合膜和新型光学材料领域的应用现状。最后,总结了基于目前CNC手性材料制备和应用存在的一些问题,以期为今后手性材料的应用研究提供参考。

Cellulose nanocrystals(CNC)is a kind of nanocellulose with high crystallinity,which is prepared by the acid hydrolysis of natural cellulose.CNC can form iridescent films with chiral nematic liquid crystal phase through evaporation-induced self-assembly(EISA).The preparation process of CNC is simple,and CNC has biological sustainability and inherent chiral nematic structure that shows unique optical properties.Advanced optical materials can be prepared by co-assembling CNC as chiral templates with polymers or inorganic materials,which has a broad application prospect in the fields of sensors,photoelectric devices,and intelligent display.The preparation of CNC,the formation of chiral structure and the study of CNC as template are introduced in this paper,and the application status of CNC in the preparation fields of ordered mesoporous materials,functional nanocomposite membranes and new optical materials are briefly reviewed.Finally,some problems in the preparation and application of CNC chiral materials are summarized,which is expected to provide reference for the application of CNC chiral materials in the future.