Fabrication and Mechanical Properties of Graphene/PVA Nano-Composites
Abstract: In this study, mechanical properties of nanocomposite materials, graphene and Polyvinyl Alcohol (PVA) are investigated. In the first part, the fabrication procedure of synthesizing graphene is discussed. Basically, we use Modified Hummer Method to oxidize graphite powder into graphene oxide (GO), and reduce graphene oxide back to graphene, also known as reduced graphene oxide (RGO), using hexamethylenetetramine (HTMA). From the result of XPS, Raman and AFM analysis, we’ve successfully demonstrated that graphene oxide is reduced back to graphene. In the second part, the mechanical properties of composite materials were discussed. We can extract stress and strain curve and Young’s modulus from tensile test. From these results, we’ve concluded that the ductility of Polyvinyl Alcohol has been decreased and has turned into brittle material while in-corporating additional graphene. In comparison with Young’s Modulus of 714.3 MPa and the av-erage tensile strength of 15 MPa for pure Polyvinyl Alcohol, the Young’s modulus has increased to 11290.3 MPa (almost 16 times of pure Polyvinyl Alcohol) and the average tensile strength can achieve 37 MPa while incorporating additional 3% grapheme oxide in Polyvinyl Alcohol. However, the tensile strength merely achieves 27 MPa while incorporating excess reduced graphene oxide in Polyvinyl Alcohol as a result of non-dispersive clusters of graphene.
文章引用: 郑信民 , 王怡轸 , 朱仁佑 , 蔡玲娜 , 刘显光 (2015) 石墨烯–聚乙烯醇奈米复合材料之制程与机械性质。 材料科学， 5， 103-110. doi: 10.12677/MS.2015.53015
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