Poly(vinyl alcohol)/graphene oxide nanocomposites prepared by a simple eco-process
Poly(vinyl alcohol)/graphene oxide nanocomposites prepared by a simple eco-process
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DOI：
10.1038/pj.2012.58
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发表时间：
2012-10-01
期刊：
影响因子：
2.8
通讯作者：
Goto, Takuya
中科院分区：
文献类型：
--
作者：
Morimune, Seira;Nishino, Takashi;Goto, Takuya
石墨烯是一种单层石墨，由于其极高的电子和热性能，最近吸引了大量的关注，因为许多纳米级材料都是基于单个石墨烯。氧化石墨烯（GO）是石墨烯化学加工过程中的中间体，由用含氧官能团官能化的石墨烯组成，所述含氧官能团赋予纯石墨烯所需的溶液可加工性。本文以亲水性高分子聚乙烯醇（PVA）为基体，以水为反应介质，采用简单、环保的工艺制备了PVA/GO纳米复合材料。在PVA基体中，GO被剥离并纳米分散。我们发现，通过掺入高达1重量%的GO构建的纳米复合材料具有显著的性能，例如显著高的机械和热性能。这些优异的增强效果不仅通过剥离的GO的刚性结构和高纵横比实现，而且通过PVA和GO之间的强相互作用实现。此外，由于片状结构的GO，纳米复合材料的阻隔性能被发现显着增加。Polymer Journal（2012）44，1056-1063; doi：10.1038/pj.2012.58; 2012年4月18日在线发表
Graphene, a single layer of graphite, has recently attracted a large amount of attention because of its extremely high electronic and thermal properties, as many nanoscale materials are based on individual graphene. Graphene oxide (GO), which is the intermediate during the chemical processing of graphene, consists of graphene functionalized with oxygen-containing functional groups that imparts the desirable solution-processability to the neat graphene. Herein, poly(vinyl alcohol) (PVA), a hydrophilic polymer, was selected as the matrix, and PVA/GO nanocomposites were prepared by a simple and environment friendly process using water as the proceeding medium. In the PVA matrix, GO was exfoliated and nanodispersed. We found that the nanocomposites constructed by the incorporation of GO up to 1% by weight possess remarkable properties, such as significantly high mechanical and thermal properties. These excellent reinforcement effects were achieved not only by the rigid structure and high aspect ratio of the exfoliated GO but also by the strong interaction between PVA and GO. Furthermore, owing to the sheet-like structure of GO, the barrier properties of the nanocomposites were found to be dramatically increased. Polymer Journal (2012) 44, 1056-1063; doi: 10.1038/pj.2012.58; published online 18 April 2012