Self-stabilized polyaniline@graphene aqueous colloids for the construction of assembled conductive network in rubber matrix and its chemical sensing application
Self-stabilized polyaniline@graphene aqueous colloids for the construction of assembled conductive network in rubber matrix and its chemical sensing application
复制标题
自稳定聚苯胺@石墨烯水胶体在橡胶基体中构建组装导电网络及其化学传感应用
DOI：
10.1016/j.compscitech.2016.01.016
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发表时间：
2016-03-23
影响因子：
9.1
通讯作者：
Lu, Canhui
中科院分区：
文献类型：
--
作者：
Zhou, Zehang;Zhang, Xinxing;Lu, Canhui
石墨烯基三维导电网络在聚合物基体中的快速分散和构建对于制备导电聚合物复合材料和柔性电子器件具有重要的应用价值。本研究报道了一种在天然橡胶（NR）基体上制备石墨烯基组装导电网络的简单有效的方法。具体来说，利用苯胺作为还原剂和稳定剂，通过原位还原氧化石墨烯制备了polyaniline@graphene纳米杂化物。所得的自稳定polyaniline@graphene纳米杂化体可以通过静电斥力在水悬浮液中分散。通过胶乳组装技术将其与NR均质化后，它们可以位于NR胶乳微球之间的间隙空间中，并组织成连续的三维分层网络。制备的具有这种3D导电网络的聚丙烯腈具有非常低的渗透阈值（比传统的NR/石墨烯共混物低3倍），增强的导电性（高达6个数量级），同时具有优异的化学传感性能。本研究为在不使用稳定剂或复杂的表面改性的情况下稳定水介质中的石墨烯纳米片提供了一种可行的方法，并扩展了其在作为化学传感材料的聚氯乙烯制备中的应用。(C) 2016 Elsevier Ltd.版权所有。
Facile dispersion and construction of graphene-based 3D conductive network in polymer matrix are highly attractive for the preparation of conductive polymer composites (CPCs) and flexible electronic devices. In this study, a simple and effective strategy for the fabrication of graphene-based assembled conductive network in natural rubber (NR) matrix is reported. Specifically, polyaniline@graphene nanohybrids were prepared by in situ reduction of graphene oxide using aniline as both reducing and stabilizing agents. The resulted self-stabilized polyaniline@graphene nanohybrids could well disperse in aqueous suspension by electrostatic repulsion. When homogenized with NR through latex assembly technique, they could be located in the interstitial space between the NR latex microspheres and organized into a continuous 3D hierarchical network. The as-prepared CPCs with this 3D conductive network exhibited a very low percolation threshold (3-fold lower than that of the conventional NR/graphene blends), enhanced electrical conductivity (up to 6 orders of magnitude improvement) and meanwhile excellent chemical sensing properties. This work provides a feasible approach to stabilize graphene nanosheets in aqueous media without the use of stabilizer or complicated surface modification and extend their applications in the preparation of CPCs as chemical sensing materials. (C) 2016 Elsevier Ltd. All rights reserved.