Preparation and electrical conductivity of graphene/ultrahigh molecular weight polyethylene composites with a segregated structure
Preparation and electrical conductivity of graphene/ultrahigh molecular weight polyethylene composites with a segregated structure
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DOI：
10.1016/j.carbon.2012.05.045
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发表时间：
2012-10-01
期刊：
影响因子：
10.9
通讯作者：
Zhao, Zhudi
中科院分区：
文献类型：
--
作者：
Hu, Hongliang;Zhang, Guo;Zhao, Zhudi
采用两步法制备了石墨烯包覆超高分子量聚乙烯（UHMWPE）粉体。第一步是用氧化石墨烯（GO）片涂覆UHMWPE聚合物。第二步是将粉末上的GO还原成石墨烯。两步法可以有效地防止石墨烯在还原过程中的聚集。将所得石墨烯/UHMWPE混合物在200 ℃下热压以获得具有偏析结构的复合材料。该复合材料表现出很高的电导率在一个非常低的逾渗阈值（0.028体积%）。该方法为制备低逾渗阈值的石墨烯/聚合物导电复合材料提供了一条新的途径。(C)2012爱思唯尔有限公司保留所有权利。
Graphene-coated ultrahigh molecular weight polyethylene (UHMWPE) powders were prepared by a two-step process. The first step is to coat UHMWPE polymers with graphene oxide (GO) sheets. The second step is to reduce GO on the powders to graphene. The two-step process can effectively prevent the aggregation of graphene during reduction. The resultant graphene/UHMWPE mixtures were hot pressed at 200 degrees C to obtain the composites with a segregated structure. The composites exhibit high electrical conductivity at a very low percolation threshold (0.028 vol.%). Our method provides a new route for preparing electrical conductive graphene/polymer composites with low percolation threshold. (C) 2012 Elsevier Ltd. All rights reserved.