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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; Li, Nan; Xiao, Laihui; Liu, Haiqin; Wang, Yigang; Chen, Jie; Nie, Xiaoan; Zhu, Yutian
關鍵字:carbon nanotube,selfassembly
論文來源:期刊
發(fā)表時間:2019年



A 26.83-fold increase in toughness (to 3.25 0.12 GJ m3) 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 m3; 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 (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

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