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Nano Research

Article Title

Facile preparation of pristine graphene using urea/glycerol as efficient stripping agents

Authors

Jianping Chen, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China
Weili Shi, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Zhaodongfang Gao, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Tao Wang, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Shan Wang, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Lijie Dong, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Quanling Yang, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Chuanxi Xiong, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Keywords

urea/glycerol, pristine graphene, thermal conductivity, graphene-based composite

Abstract

ABSTRACT Large-scale exfoliation of defect-free and few-layer graphene by an inexpensive and environmentally-friendly route has been a significant challenge for a long time. Here we show that high-quality, few-layer graphene with high stability and low defect content can be obtained from natural graphite via a simple stirring process in urea/glycerol, with yields of up to 12 wt.%. We also demonstrate that this facile method can be applied to the exfoliation of other two-dimensional materials, such as molybdenum disulfide and boron nitride. The as-prepared graphene was further composited with polyvinylidene fluoride (PVDF) and the composite exhibited a low percolation threshold of 0.05 vol.%. The incorporation of low (4.5 vol.%) graphene amounts led to a significant increase in the thermal conductivity of the graphene–PVDF composites.

Graphical Abstract

Publisher

Tsinghua University Press

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