文献类型：期刊文献

英文题名：Simultaneously strengthening, toughening, and conductivity improving for epoxy at ultralow carbonaceous filler content by constructing 3D nanostructures and sacrificial bonds

作者：Li, Nan[1] Huang, Jinrui[2,3,4,5,6] Wang, Yong[1] Xiao, Laihui[2,3,4,5,6] Fu, Pan[2,3,4,5,6] Yu, Haizhou[1] Nie, Xiaoan[2,3,4,5,6] Jiang, Jianchun[2,3,4,5,6] Zhu, Yutian[7] Guo, Zhanhu[8]

第一作者：Li, Nan

通信作者：Yu, HZ[1];Huang, JR[2];Huang, JR[3];Huang, JR[4];Huang, JR[5];Huang, JR[6]

机构：[1]Nanjing Tech Univ, Sch Chem & Mol Engn, Inst Adv Synth, Nanjing 211816, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Jiangsu, Peoples R China;[4]Chinese Acad Forestry, Key Lab Chem Engn Forest Prod, Natl Forestry & Grassland Adm, Nanjing 210042, Jiangsu, Peoples R China;[5]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Jiangsu, Peoples R China;[6]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[7]Hangzhou Normal Univ, Coll Mat Chem & Chem Engn, Hangzhou 311121, Zhejiang, Peoples R China;[8]Univ Tennessee, Dept Chem & Biomol Engn, Integrated Composites Lab ICL, Knoxville, TN 37966 USA

年份：2020

卷号：137

外文期刊名：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录：;EI(收录号：20202508844040);Scopus(收录号：2-s2.0-85086451253);WOS:【SCI-EXPANDED(收录号:WOS:000564567900007)】；

基金：This work was financially supported by National Natural Science Foundation of China for Youth Science Funds (51803234, 21704044) and Natural Science Foundation of Jiangsu Province for Youth Science Funds (BK20170971).

语种：英文

外文关键词：Polymer-matrix composites (PMCs); Mechanical properties; Electrical properties; Sacrificial bond

摘要：The combination of high strength, great toughness, and excellent electrical properties for conductive polymer composites is essential for their practical applications. Herein, we demonstrate a strategy to improve simultaneously the strength, toughness, and the electrical conductivity of epoxy resin. This strategy involves constructing compact 3D tannin non-covalent modified graphene/multi-walled carbon nanotube (MWCNT) hybrid network and introducing sacrificial bonds. As a result, with only 0.01 wt% the hybrid filler, the tensile strength, Young's modulus, elongation at break, the mode-I fracture toughness (K-IC), and strain energy release rates (G(IC)) of the epoxy resin were increased by 23.3%, 44.6%, 41.2%, 114.6%, and 219.3%, respectively. This filler loading is 10 and 15 times lower to obtain comparable improvement in tensile strength and K-IC compared with the lowest content reported to date. The composites also display excellent electrical properties in terms of an ultralow percolation threshold (similar to 0.076 wt%).