Synchronously improved electromagnetic interference shielding and thermal conductivity for epoxy nanocomposites by constructing 3D copper nanowires/thermally annealed graphene aerogel framework

3D copper nanowires-thermally annealed graphene aerogel (CuNWs-TAGA) framework is firstly prepared by freeze-drying followed by thermal annealing from CuNWs, graphene oxide (GO) and L-ascorbic acid. Epoxy resin is then poured back into the above 3D CuNWs-TAGA framework to fabricate the CuNWs-TAGA/ep...

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Published inComposites. Part A, Applied science and manufacturing Vol. 128; p. 105670
Main Authors Yang, Xutong, Fan, Shuguang, Li, Ying, Guo, Yongqiang, Li, Yunge, Ruan, Kunpeng, Zhang, Shengmao, Zhang, Junliang, Kong, Jie, Gu, Junwei
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2020
Subjects
A. Polymer-matrix composites (PMCs)
aerogels
annealing
ascorbic acid
B. Thermal properties
C. Electron microscopy
copper nanoparticles
D. Casting
electrical conductivity
electromagnetic interference
epoxides
freeze drying
glass transition temperature
graphene
graphene oxide
hardness
heat tolerance
nanocomposites
nanowires
thermal conductivity
A. Polymer-matrix composites (PMCs)
C. Electron microscopy
D. Casting
B. Thermal properties
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Summary:3D copper nanowires-thermally annealed graphene aerogel (CuNWs-TAGA) framework is firstly prepared by freeze-drying followed by thermal annealing from CuNWs, graphene oxide (GO) and L-ascorbic acid. Epoxy resin is then poured back into the above 3D CuNWs-TAGA framework to fabricate the CuNWs-TAGA/epoxy nanocomposites. CuNWs with average diameter of about 120 nm and length of approximate 10 μm are successfully prepared. When the mass fraction of CuNWs-TAGA is 7.2 wt% (6.0–1.2 wt% CuNWs-TAGA), the thermal conductivity coefficient (λ) value of the CuNWs-TAGA/epoxy nanocomposites reaches the maximum of 0.51 W/mK. Meantime, the CuNWs-TAGA/epoxy nanocomposites exhibit the maximum electromagnetic interference shielding effectiveness (EMI SE) value of 47 dB and electrical conductivity (σ) of 120.8 S/m, ascribed to perfect 3D CuNWs-TAGA conductive network structures. Meanwhile, the corresponding elasticitymodulus, hardness, glass transition temperature (Tg) and heat-resistance index (THRI) of the CuNWs-TAGA/epoxy nanocomposites increase to 4.69 GPa, 0.33 GPa, 126.3 °C and 181.7 °C, respectively.
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ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2019.105670