Preparation and Characterization of Graphene/Poly(vinyl alcohol) Nanocomposites
Preparation and Characterization of Graphene/Poly(vinyl alcohol) Nanocomposites
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DOI：
10.1002/app.32278
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发表时间：
2010-10-05
影响因子：
3
通讯作者：
Shen, Ke-Cheng
中科院分区：
文献类型：
--
作者：
Jiang, Lei;Shen, Xiao-Ping;Shen, Ke-Cheng
基于石墨烯（GE）的纳米复合材料是一种新兴的材料，具有广泛的应用前景。本文介绍了制备GE/聚乙烯醇（PVA）纳米复合材料的一般方法。其基本策略包括：从石墨制备氧化石墨，将氧化石墨完全剥落成氧化石墨烯片，然后还原成GE纳米片，最后通过简单的溶液混合法制备GE/PVA纳米复合材料。采用x射线衍射、场发射扫描电镜、傅里叶变换红外光谱、热重法和差示扫描量热法对合成产物进行了表征。GE纳米片在聚乙烯醇基体中分散良好，有效地防止了GE纳米片的再堆积。由于PVA与GE之间主要通过氢键相互作用产生较强的界面相互作用，加之PVA结晶度的提高，使得纳米复合材料的力学性能和热稳定性得到明显改善。当GE载荷为3.25 wt %时，PVA的抗拉强度从23 MPa提高到49.5 MPa。(C) 2010 Wiley期刊公司高分子学报（自然科学版）33 (2):379 - 379,2010
Graphene (GE)-based nanocomposites are emerging as a new class of materials that hold promise for many applications. In this article, we present a general approach for the preparation of GE/poly(vinyl alcohol) (PVA) nanocomposites. The basic strategy involved the preparation of graphite oxide from graphite, complete exfoliation of graphite oxide into graphene oxide sheets, followed by reduction to GE nanosheets, and finally, the preparation of the GE/PVA nanocomposites by a simple solution-mixing method. The synthesized products were characterized by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetry, and differential scanning calorimetry analysis. The GE nanosheets were well dispersed in the PVA matrix, and the restacking of the GE sheets was effectively prevented. Because of the strong interfacial interaction between PVA and GE, which mainly resulted from the hydrogen-bond interaction, together with the improvement in the PVA crystallinity, the mechanical properties and thermal stability of the nanocomposites were obviously improved. The tensile strength was increased from 23 MPa for PVA to 49.5 MPa for the nanocomposite with a 3.25 wt % GE loading. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 275-279, 2010