湿度响应型强韧纤维素纳米晶体结构色薄膜的制备与性能  

Preparation and Properties of Tough Cellulose Nanocrystalline Structural Color Films for Humidity Response

作　　者：黄新瑶 王京泽 王海松 吕艳娜 HUANG Xin-yao;WANG Jing-ze;WANG Hai-song;LV Yan-na(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学轻工与化学工程学院,大连116034

出　　处：《印刷与数字媒体技术研究》2024年第3期310-318,共9页Printing and Digital Media Technology Study

基　　金：辽宁省教育厅面上项目(No.JYTMS20230399);广西清洁化制浆造纸与污染控制重点实验室开放基金(No.2021KF21)。

摘　　要：纤维素纳米晶体(CNC)是纤维素的衍生物,具有纳米材料特性和手性光学特性。为了提高CNC薄膜的力学性能和湿度响应,本研究以多羟基结构的D-木糖和木糖醇为增塑剂和湿敏剂,与CNC悬浮液共混,通过蒸发诱导自组装,制备可湿度响应的强韧CNC复合膜。结果表明:D-木糖和木糖醇添加量为45%的复合膜,其断裂伸长率分别为12.6%和19.15%,是CNC膜的14.8倍和22.5倍;拉伸强度分别增大至86.58MPa和145.9MPa,是CNC膜的1.3倍和2.3倍;随着D-木糖和木糖醇含量的增加,复合膜的结构色逐渐红移,反射波长增大;添加木糖醇的CNC/X薄膜的湿度响应反射波长最大,响应灵敏性最佳。因此,CNC结构色薄膜在智能响应、传感检测等方面具有巨大的应用潜力。Cellulose nanocrystals(CNC)are derivatives of cellulose with nanomaterial properties and chiral optical properties.In order to improve the mechanical properties and humidity response of CNC films,D-xylose and xylitol were used as plasticizers and hygroscopic agent to prepare CNC composite films by evaporation induced selfassembly.The results showed that the elongation at break of the film with the addition of 45%D-xylose and xylitol increased by 12.6%and 19.15%,respectively,which were 14.8 and 22.5 times that of CNC film.The tensile strength increased to 86.58 MPa and 145.9 MPa,respectively,which were 1.3 and 2.3 times that of CNC film.With the increase of the content of D-xylose and xylitol,the structural color of the composite films were gradually redshifted and the reflection wavelength increased.The CNC film with xylitol has the highest humidity response reflection wavelength and the best response sensitivity.Therefore,CNC films with structural colors has great application potential in intelligent response,sensing and detection.

关 键 词：纤维素纳米晶体 胆甾相液晶 湿度响应 结构色薄膜 

分 类 号：TB383[一般工业技术—材料科学与工程]