Robust Self-Healing Magnetically Induced Colloidal Photonic Crystal Hydrogels
Robust Self-Healing Magnetically Induced Colloidal Photonic Crystal Hydrogels
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强大的自愈磁感应胶体光子晶体水凝胶
DOI：
10.1021/acsapm.9b00905
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发表时间：
2020-02
影响因子：
5
通讯作者：
Xia Weiwei
中科院分区：
文献类型：
--
作者：
Yin Su-Na;Liu Juan;Wu Defeng;Chen Su;Xia Weiwei
作为许多生物的重要生物学功能，结构颜色和自我修复功能对生物体的生存起着至关重要的作用。受这些特性的启发，通过将磁性组装的Fe3O4@SiO2胶体纳米颗粒固定在自修复水凝胶基质中，构建了结构颜色稳定的智能自愈合胶体光子晶体(CPCS)材料。用邻甲基壳聚糖(O-CMC)改性的生物可降解材料聚1-乙烯-2-吡咯烷酮-共丙烯酰胺(O-CMC)制备的自修复水凝胶具有良好的力学性能和良好的韧性和弹性。有趣的是，嵌入在骨架中的一维Fe3O4@SiO2链结构可以保持光子带隙结构的稳定性和由此产生的明亮的结构颜色。此外，基质中的O-CMC可以提供丰富的羧基、氨基和羟基官能团，形成丰富的分子间氢键，从而赋予CPC彩色水凝胶强大的自愈能力。在此基础上，设计了一种三维花卉图案，实现了任意三维构型的造型。这项工作为制备具有更长功能寿命的结构彩色CPC材料提供了一条简便易行的途径，从而扩大了其实际应用。
As important biological functions of many creatures, structural colors and self-healing features play crucial roles in the survival of organisms. Inspired by these features, the intelligent self-healing colloidal photonic crystals (CPCs) materials with stable structural colors are constructed here by immobilizing magnetically assembling Fe3O4@SiO2colloidal nanoparticles into a self-repairing hydrogel matrix. The self-repairing hydrogels, prepared by using biodegradable material poly(1-vinyl-2-pyrrolidinone-co-acrylamide) modified withO-carboxymethyl chitosan (O-CMC), exhibit an outstanding mechanical property with favorable toughness and elasticity. Interestingly, one-dimensional Fe3O4@SiO2chain structures embedded in the framework can maintain the stability of the photonic band-gap structure and its resultant bright structural colors. Furthermore, O-CMC contained in the matrix can supply plentiful carboxyl, amino, and hydroxyl functional groups which can form abundant intermolecular hydrogen bonds, and thus give the robust self-healing capability to the CPC colored hydrogels. On the basis of such CPCs hydrogels with bright structural colors and robust self-healing properties, a 3D flower pattern has been designed to realize arbitrary 3D configurable modeling. This work might constitute a promising simple way to fabricate structural colored CPC materials with a longer functional life, and thus extend their practical applications.
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