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Bio-Inspired Cellulose Composites With Multicolor Separation via Electro-Thermal and Magneto-Thermal Techniques for Multifunctional Applications
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-18 , DOI: 10.1002/adfm.202408792
Xiaoxiang Wen 1 , Yifan Yue 1 , Changxing Wang 1 , Jinxia Zhang 1 , Yuechi Xie 1 , Yayun Ning 1 , Jianing Li 1 , Xuegang Lu 1 , Sen Yang 1
Affiliation  

Biomimetic optical devices based on cellulose nanocrystals with tunable structural colors have received significant attention recently. However, the limited ability to control multicolor separation beyond simple single-color modulation restricts its practical applications. Here, a diversified multicolor separation strategy for the cholesteric phase cellulose composite (CPCC) is presented. The CPCC is prepared by integrating a high-concentration self-assembled hydroxypropyl cellulose with a cross-linked poly(acrylic acid-acrylamide) (P(AA-AM)) network. By adjusting the cross-linking degree of P(AA-AM) in CPCC, Thermally induced multicolor separation is achieved from a homochromatic state at room temperature to multicolor patterned display at elevated temperatures. Furthermore, by utilizing the electric heating effect of conductive carbon oil, the multicolor separation under low voltage is achieved, and based on this, pixelated electro-thermochromic displays are developed. Additionally, magneto-thermal multicolor separation induced by introducing FeNi3 nanoparticles is investigated with efficient magnetic induction heating ability into CPCC. The multicolor separation effect is further improved by pixelated distribution of FeNi3 nanoparticles and adjusting the concentration of FeNi3 in each pixel. Finally, thermochromism, electro-thermochromic, and magneto-thermochromic functionalities are integrated into the CPCC, achieving advanced multilevel information encryption. This multilevel approach of controlling multicolor separation significantly enhances the functionality of nanocellulose in various potential photonic applications.

中文翻译:


通过电热和磁热技术进行多色分离的仿生纤维素复合材料,适用于多功能应用



基于纤维素纳米晶体的仿生光学器件具有可调结构颜色,近年来受到了极大的关注。然而,除了简单的单色调制之外,控制多色分离的能力有限,这限制了它的实际应用。本文提出了一种用于胆固醇相纤维素复合材料 (CPCC) 的多样化多色分离策略。CPCC 是通过将高浓度自组装羟丙基纤维素与交联聚(丙烯酸-丙烯酰胺)(P(AA-AM))网络整合而成的。通过调节 CPCC 中 P(AA-AM) 的交联度,实现了从室温下的同色状态到高温下的多色图案显示的热诱导多色分离。此外,利用导电碳油的电加热效应,实现了低电压下的多色分离,并在此基础上开发了像素化电热致变色显示器。此外,研究了引入 FeNi3 纳米颗粒诱导的磁热多色分离以及高效的磁感应加热能力。通过像素化分布 FeNi3 纳米颗粒并调整每个像素中 FeNi3 的浓度,进一步提高了多色分离效果。最后,将热致变色、电热致变色和磁热致变色功能集成到 CPCC 中,实现先进的多级信息加密。这种控制多色分离的多级方法显著增强了纳米纤维素在各种潜在光子应用中的功能。
更新日期:2024-09-18
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