石墨烯/PAN纳米复合膜的制备及其力学性能

Preparation and Mechanical Property of Graphene/PAN Composite Membrane

以改进的Hummer法制备了氧化石墨烯(GO),并以抗坏血酸(L-AA)为还原剂制备了还原性氧化石墨烯(rGO).以石墨烯为添加物,采用静电纺丝的方法制备了石墨烯/聚丙烯腈(GO/PAN)纳米纤维复合膜.使用场发射扫描电镜、X射线衍射、红外光谱以及热重分析对石墨烯进行了研究,测试了石墨烯对纳米复合纤维材料力学性能的影响.结果表明:当添加的GO质量分数为0.3%时,纺制的纤维平均直径为103nm,复合膜的力学性能有所提高,比纯PAN膜的拉伸强度提高了42.4%,断裂伸长率增加了32.5%;当GO质量分数超过0.3%时,复合膜的力学性能变差;当GO和rGO质量分数均为0.3%时,GO/PAN复合膜的力学性能优于rGO/PAN复合膜.

Graphene oxide （GO） was synthesized by an improved Hummer method and reduced graphene oxide （rGO） was prepared using ascorbic acid （L-AA） as a reducing agent. The electrospun graphene/ polyacrylonitrile （GO/PAN） composite membranes were prepared. Field emission scanning electron microscopy, X-ray diffraction, infrared spectroscopy and thermal gravimetric analysis were used to characterize graphene. The mechanical properties of composite membranes were tested to study the effect of graphene. Results show that when the amount of GO added up to 0.3 %, the average diameter of the nanofibers is 103 nm, the mechanical properties of the Composites are improved and the tensile strength increasing by 42.4% and the elongation at break increasing by 32.5% compared with the pure PAN membrane. When the amount of GO is over 0.3 %, the composite membrane performance becomes deteriorate. When the amounts of GO and rGO are 0.3 %, the mechanical properties of GO/PANcomposite are better than rGO/PAN composite.