Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 153, Issue -, Pages 151-159Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2017.10.009
Keywords
In situ; Exfoliation; Graphene; Polyamide-6; Thermal conductivity
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Funding
- National Natural Science Foundation of China [51433006]
- Science and Technology Supporting Plan of Sichuan Province [2015GZ0067]
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In this study, we reported a new in situ method to prepare the polyamide-6 (PA6)/graphene nanoplates by solid state shear milling. The PA6/graphene nanoplates compounding powder was prepared with the addition of 10 wt% of graphite. During the milling process, graphite was in situ exfoliated into few-layer graphene sheets in the PA6 matrix in solid phase. Using this compounding powder, the PA6/graphene composites were fabricated with different contents of graphene by melting dilution process. The number of graphene layers was 4-6 which was confirmed by high -resolution Transmission electron microscopy and Atomic Force Microscope. The exfoliation process of graphite was also demonstrated by Scanning electron microscopy observation. Both Raman and X-ray diffraction proved that the thickness of graphite was reduced significantly. The thermal conductivity of the composites with 5.0 wt% of graphene loading was increased by 85% and the yield strength was also appreciably enhanced. The results showed that solid phase in situ exfoliation method paves a new way to prepare graphene-based polymer composites on a large-scale with high performance. (C) 2017 Elsevier Ltd. All rights reserved.
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