纤维素纳米晶体基光子晶体薄膜材料的制备及性能研究进展

Research Progress on Preparation and Properties of Cellulose Nanocrystals Based Photonic Crystal Thin Film Materials

关键词:  纤维素纳米晶体  蒸发诱导自组装  光子晶体薄膜  功能材料

Key Words:cellulose nanocrystals  evaporation induced self-assembly  photonic crystal film  functional materials

摘要:纤维素纳米晶体（CNC）是从天然纤维中提取出的一种纳米级纤维素，可通过蒸发诱导自组装（EISA）法形成具有手性向列结构的薄膜，并提供直观的可视化信息，是新一代光子液晶材料的首选。然而，目前CNC基光子材料存在力学性能和动态光学响应性能差等问题，难以实现其功能化扩展，所以通常引入添加剂来提高其柔韧性和适应性。本文结合CNC特性，系统地阐述了当前光子晶体膜的制备工艺及其影响因素，并归纳出不同的可控制备方案，包括力学强度、色彩响应性等，同时分析了CNC基光子材料在不同领域的潜在应用和发展趋势。

Abstract:Cellulose nanocrystals （CNC） is a type of nanoscale cellulose extracted from natural fibers， and can form thin film materials with chiral nematic structures and bright colors through the method of evaporation induced self-assembly （EISA）， which can provide rich and intuitive visual information， making it the preferred for the new generation of photonic liquid crystal materials. However， CNC-based photonic materials currently suffer from issues such as poor mechanical properties and dynamic optical response， making it difficult to achieve their functional expansion. Therefore， the additives are usually added to improve the flexibility and adaptability of CNC. Hence， this review aimed to systematically elaborate on the current preparation processes and influencing factors of photonic crystal thin films by combining CNC’s characteristics and summarized different controllable preparation schemes， including mechanical strength， color responsiveness， etc. Meanwhile， it also emphasized the potential applications and development trends of CNC-based photonic materials in different fields.