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石墨烯与壳聚糖的纳米复合材料性能及其表征


湖北汽车工业学院科技学院毕业设计论文 摘 要 本文采用液相法制备石墨烯/壳聚糖复合材料,将石墨烯按不同比例加入到百 分比为 2wt%的壳聚糖醋酸溶液中,用磁力搅拌 6 小时后再用超声处理 20 分钟,使 氧化石墨烯分散均匀,脱泡,将混合液倒在器皿内放在鼓风机中室温下烘干,即 可得到比例为石墨烯含量为 0.5wt%,1wt%,2wt%,3wt%,4wt%氧化石墨烯/壳聚糖纳 米复合材料膜。利用做好的复合材料膜样品进行 TG、红外、DSC、XRD、力学性能 测试。结果表明:石墨烯加入到壳聚糖中表现出复合材料的热稳定性明显提高。 其符合材料的熔点相对于纯 CS 也有明显提高。随着石墨烯的逐渐加入,CS/GO 复 合材料 Tg 也会增加。与纯壳聚糖和氧化石墨烯相比,在壳聚糖/氧化石墨烯纳米 复合材料的光谱中,在 1550cm-1 处的-NH2 吸收振动和在 1730cm-1 处的属于羧基 的 C=O 伸缩振动两个峰都消失。石墨烯通过超声波处理,彻底剥离,形成单片层 的石墨烯,在壳聚糖基体中分散良好。随着石墨烯含量的增加,CS/GO 复合材料的 杨氏模量和拉伸强度有明显的改善。但另一方面,在一定程度上使复合材料的断 裂伸长率和韧性降低。 关键词:石墨烯,壳聚糖,复合材料 I 湖北汽车工业学院科技学院毕业设计论文 Abstract This paper was prepared by liquid graphene / chitosan composite graphene different proportion to the percentage of added 2wt% acetic acid solution of chitosan, with a magnetic stirring for 6 hours and then sonicated for 20 minutes, the oxidation graphene dispersed, degassing, the mixture was poured in containers placed inside the blower drying at room temperature, you can get a ratio of graphene content is 0.5wt%, 1wt%, 2wt%, 3wt%, 4wt% graphite oxide ene / chitosan nanocomposite membranes. Make use of composite membrane samples TG, IR, DSC, XRD, mechanical testing. The results showed that: in graphene added to chitosan composites exhibit significantly improved thermal stability. Compliance with respect to the melting point of pure CS is also significantly improved. Was gradually added with graphene, CS / GO composite Tg will increase. Pure chitosan and graphene oxide compared to the chitosan / graphene oxide n

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