以鳞片石墨为原料通过改良的Hummers方法制备氧化石墨烯(GO).以GO为助剂,采用熔融共混法制备了聚乳酸(PLA)/GO纳米复合材料.通过X射线衍射、扫描电子显微镜、透射电子显微镜对PLA/GO纳米复合材料的结构进行了表征,并对其力学性能和结晶度进行了测试.微观结构分析表明,GO呈现剥离状,并均匀分散在PLA基质中;力学性能研究表明,1％GO的加入有助于改善PLA复合材料的断裂伸长率;断面扫描电镜分析表明PLA复合材料断面发生明显改变,呈现出韧性断裂特征;差示扫描量热结果显示GO可以消除PLA基质冷结晶,有助于提高PLA复合材料结晶度,与X射线衍射分析相吻合.
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