Enhanced Mechanical Properties of Graphene-Based Poly(vinyl alcohol) Composites
Enhanced Mechanical Properties of Graphene-Based Poly(vinyl alcohol) Composites
复制标题
石墨烯基聚乙烯醇复合材料的增强机械性能
DOI：
10.1021/ma902862u
复制
发表时间：
2010-03-09
期刊：
影响因子：
5.5
通讯作者：
Lu, Ping
中科院分区：
文献类型：
--
作者：
Zhao, Xin;Zhang, Qinghua;Lu, Ping
石墨烯是一种扁平的碳纳米片，由于其前所未有的物理化学性质，在许多科学和工程领域产生了巨大的活动。随着合成简便性和高产率等广泛适用性的发展，这种令人兴奋的材料已经为其在制备聚合物纳米复合材料中的实际应用奠定了基础。在这里，我们报道了完全剥离的石墨烯纳米片与聚乙烯醇(PVA)的纳米复合材料是通过表面水溶液制备的。在较低的石墨烯含量下，石墨烯/PVA复合材料的力学性能得到了显著的提高，即当石墨烯含量为1.8vol%时，拉伸强度提高了150%，杨氏模量提高了近10倍。杨氏模数的实验结果与理论模拟结果的对比表明，石墨烯纳米片在聚合物基质中主要是无规分散在纳米复合膜中。
Graphene, flat carbon nanosheets, has generated huge activity in many areas of science and engineering due to its unprecedented physical and chemical properties. With the development of wide-scale applicability including facile synthesis and high yield, this exciting material is ready for its practical application in the preparation of polymer nanocomposites. Here we report that nanocomposites based on fully exfoliated graphene nanosheets and poly(vinyl alcohol) (PVA) are prepared via a facial aqueous solution. A significant enhancement of mechanical properties of the graphene/PVA composites is obtained at low graphene loading; that is, a 150% improvement of tensile strength and a nearly 10 times increase of Young’s modulus are achieved at a graphene loading of 1.8 vol %. The comparison between the experimental results and theoretical simulation for Young’s modulus indicates that the graphene nanosheets in polymer matrix are mostly dispersed randomly in the nanocomposite films.