Fabrication and Characterization of Meta-Aramid-Based Nanocomposite Films Reinforced with Graphene
Vol. 56, No. 5, pp. 265-271,
Oct. 2019
10.12772/TSE.2019.56.265
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Abstract
Herein, we report the microstructures and thermal and electrical properties of meta-aramid-based nanocomposite films containing different graphene contents of 0−10.0 wt%, which are fabricated by solution-casting of meta-aramid and graphene mixtures in N,N-dimethylacetamide and lithium chloride. The microstructure, thermal stability, and dynamic mechanical thermal and electrical properties of the nanocomposite films were investigated by considering the dispersion and loading content of the graphene sheets. The electron microscopic images and X-ray diffraction patterns revealed that the graphene sheets were well dispersed in the nanocomposite films with relatively low graphene loadings of 0.1−1.0 wt%. However, partially ordered graphene aggregates were formed in
the nanocomposite films with high graphene contents of 3.0−10.0 wt%. The thermal stability and dynamic mechanical thermal properties were observed to increase with the graphene content in the nanocomposite films. The electrical percolation threshold of the nanocomposite films was attained at a critical graphene content between 1.0 wt% and 3.0wt%. Consequently, the electrical resistivity decreased substantially from ~1016 Ω cm of the neat meta-aramid film to ~102 Ω cm of the nanocomposite film with 10.0 wt% graphene loading.
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