文献类型：期刊文献

英文题名：Mechanically robust nacre-mimetic framework constructed polypyrrole-doped graphene/nanofiber nanocomposites with improved thermal electrical properties

作者：Wang, Zhong[1,2] Mo, Liuting[1,2] Zhao, Shujun[1,2] Li, Jianzhang[1,2] Zhang, Shifeng[1,2] Huang, Anmin[3]

第一作者：Wang, Zhong

通信作者：Zhang, SF[1];Huang, AM[2]

机构：[1]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;[2]Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2018

卷号：155

起止页码：278-287

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20182405309436);Scopus(收录号：2-s2.0-85048274201);WOS:【SCI-EXPANDED(收录号:WOS:000440314300027)】；

基金：This work was financially supported by The Fundamental Research Funds for the Central Universities (NO. 2016ZCQ01; No. 2017PT04) and the National Natural Science Foundation of China (Project 51779005/E090301).

语种：英文

外文关键词：Graphene; Interconnected network; Nacre-mimetic nanocomposites; Polypyrrole nanohybrids; Thermal/electrical conductivity

摘要：Nacre mimetics show great potential as mechanically robust, lightweight, and promising functional materials. Herein, we report a nanostructured nacre-mimetic hybrid framework, prepared via in situ self-polymerization of tannic acid (TA) and pyrrole monomer on cellulose nanofiber (CNF)-anchored graphene nanosheets (GNs), as a two-dimensional interconnected network (designated as TA@PG-CNF) to fabricate mechanically robust and thermally and electrically conductive composites. A unique network structure with a combination of conductive polypyrrole (PPy) protrusions and multiscale nanofibers/nanoplates was obtained, where the nanohybrid protrusions acted as bridges that link the adjacent GNs and nanofibers. As a result, a composite with low filler loading (10.0 wt%) exhibited advantages for the combination of all properties, i.e., enhanced electrical and thermal conductivity (6.52 S cm(-1) and 7.81W m(-1) K-1), high tensile strength (217.9 MPa), and good toughness (19.6 MJ m(-3)). We attribute the enhancement of these properties to the construction of an interconnected TA@PG-CNF skeleton and the oriented "brick-and-mortar" structure based on GNs blocks and the polyvinyl alcohol matrix, in which a mechanically robust conductive network was constructed. We envision that the relevant functionalities can be integrated into stiff and strong bioinspired materials as flexible microelectronic candidates. (C) 2018 Elsevier Ltd. All rights reserved.