Multifunctional cellulose nanocrystal structural colored film with good flexibility and water-resistance
Multifunctional cellulose nanocrystal structural colored film with good flexibility and water-resistance
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DOI：
10.1016/j.ijbiomac.2020.01.247
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发表时间：
2020-04-15
影响因子：
8.2
通讯作者：
Shen, Huifang
中科院分区：
文献类型：
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作者：
Huang, Yiyan;Chen, Gaowen;Shen, Huifang
手性向列型纤维素纳米晶（CNC）结构有色材料因其独特的螺旋结构和优异的光学性能而成为近年来广泛研究的焦点。然而，CNC普遍存在机械性能差、耐水性差等缺点，限制了其应用。本文通过将CNC和PEGDA前驱体共组装，然后通过紫外光固化构建三维交联网络，制备了高柔韧性、耐水性的手性CNC/PEGDA复合薄膜。由于CNC和PEGDA的水刺激响应特性，CNC/PEGDA（8/2）复合膜可用作含水量检测器，光子纸。另外，通过对PEGMA溶液进行涂覆或不涂覆，可产生不同的交联度，可应用于防伪标签。该复合薄膜具有良好的循环稳定性，有望在光学传感器、显示器和安全领域得到应用。(C)2020爱思唯尔B. V.保留所有权利。
Chiral nematic cellulose nanocrystal (CNC) structural colored materials are the focus of extensive research in recent years on account of their unique helical structure and excellent optical properties. However, the general weak mechanical properties and poor water-resistance of CNC limit its utility. Here, we fabricated highly flexible, water-resistant chiral nematic CNC/Poly(ethylene glycol) diacrylate(PEGDA) composite films, which was realized by co-assembling CNC and PEGDA precursor then via UV curing to construct a three-dimensional crosslinking network. Due to the water stimulus-responsive feature of the CNC and PEGDA, the CNC/PEGDA (8/2) composite film could be used as a water-content detector, photonic paper. In addition, it could produce different crosslinking degrees by coating the PEGMA solution or not, which could be applied to an anti-counterfeit label. The composite film with excellent stability of cycles is expected to be a promising candidate in optical sensors, display, and security fields. (C) 2020 Elsevier B.V. All rights reserved.