文献类型：期刊文献

英文题名：Fabrication of a highly tough, strong, and stiff carbon nanotube/epoxy conductive composite with an ultralow percolation threshold via self-assembly

作者：Huang, Jinrui[1,2,3,4] Li, Nan[1,2,3,5,6] Xiao, Laihui[1,2,3,4] Liu, Haiqin[4] Wang, Yigang[1,2,3] Chen, Jie[1,2,3] Nie, Xiaoan[1,2,3] Zhu, Yutian[7]

第一作者：Huang, Jinrui;黄金瑞

通信作者：Huang, JR[1];Nie, XA[1];Huang, JR[2];Nie, XA[2];Huang, JR[3];Nie, XA[3];Huang, JR[4];Zhu, YT[5]|[a0005997aa787f4d4afa0]聂小安;

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

年份：2019

卷号：7

期号：26

起止页码：15731-15740

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000474271200022)】；

基金：This work was financially supported by the Key Laboratory of Biomass Energy and Materials of Jiangsu Province (JSBEM-S-201703), National Natural Science Foundation of China for Youth Science Funds (51803234), and Natural Science Foundation of Jiangsu Province for Youth Science Funds (BK20150073).

语种：英文

外文关键词：Cellular automata - Epoxy resins - Fabrication - Nanotubes - Percolation (computer storage) - Percolation (fluids) - Self assembly - Solvents - Structural properties - Tensile strength - Toughness

摘要：Conductive epoxy composites are of great interest in industrial applications. The electrical properties of these composites, however, often come at the expense of mechanical properties, particularly toughness. Herein, we report a simple, facile, and universal fabrication method for a strong, stiff, and extremely tough conductive epoxy composite with an ultralow percolation threshold. By tuning the interaction between multi-walled carbon nanotubes (MWCNTs) and epoxy components, they spontaneously assembled into a "cellular structure", with the MWCNTs selectively located in the continuous domain of the diglycidyl ether of bisphenol A (DGEBA) epoxy. These cellular structures dramatically improved the toughness of the epoxy resin and the electrical properties of the MWCNT/epoxy composites while maintaining an excellent tensile strength and modulus. A 26.83-fold increase in toughness (to 3.25 +/- 0.12 GJ m(-3)) was seen in the MWCNT/DGEBA/tung oil-based diglycidyl ester (TODGE) epoxy composite (0.75 wt% MWCNTs). The elongation at break of the composite increased 33.93 times (to 112.84 +/- 4.25%) over that of neat DGEBA epoxy (toughness: 116.76 +/- 7.84 MJ m(-3); elongation at break: 3.23 +/- 0.25%). The tensile strength and modulus remained at 37.09 +/- 1.28 MPa and 2.88 +/- 0.14 GPa, respectively. Moreover, composites with the cellular structure exhibited an ultralow electrical percolation threshold (similar to 0.032 wt%). The outstanding toughness and good electrical properties of the MWCNT/epoxy composites with cellular structures are attributed to the synergistic toughening effects of TODGE and MWCNTs as well as volume exclusion from the cellular structure. This work provides a new strategy for designing mechanically robust multifunctional thermoset composites, which have important applications in various fields.