Grafting of Polyester onto Graphene for Electrically and Thermally Conductive Composites
Grafting of Polyester onto Graphene for Electrically and Thermally Conductive Composites
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将聚酯接枝到石墨烯上用于导电和导热复合材料
DOI：
10.1021/ma300450t
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发表时间：
2012-04-24
期刊：
影响因子：
5.5
通讯作者：
Jia, Demin
中科院分区：
文献类型：
--
作者：
Tang, Zhenghai;Kang, Hailan;Jia, Demin
许多报道的聚合物/石墨烯复合材料，甚至一些具有优异的石墨烯分散性的聚合物/石墨烯复合材料，不具有令人印象深刻的导电性，这可能是由于未能形成互连的导电路径。本文以植物源二元醇和二元酸为原料，通过缩聚反应合成了一种生物基聚酯。然后通过BE的羟基和GO的羧基之间的酯化反应将其接枝到氧化石墨烯（GO）上。随后，接枝的GO经受维生素C还原。由于BE链两端的端羟基和GO上的多个羧基的存在，接枝物在BE基体中形成了特定的空间互连结构。所得的BE/石墨烯复合材料具有令人印象深刻的低阈值渗流的电导率，结合高的热导率。
Many reported polymer/graphene composites, even some with excellent graphene dispersion, do not possess impressive conductivity, which may be due to the failure in forming interconnected conductive paths. In this work, a kind of bio-based polyester (BE) is synthesized by polycondensation between plant-derived diols and diacids. It is then grafted onto graphene oxide (GO) via the easterification between hydroxyls of BE and carboxyls of GO. Subsequently, the grafted GO is subjected to reduce by vitamin C. Because of the presence of terminal hydroxyl group in both ends of the BE chains and multiple carboxyl groups on GO, the grafts form specific spatial interconnection structure in BE matrix. The resulting BE/graphene composites possess impressive low threshold percolation of electrical conductivity, in combination of high thermal conductivity.