摘要氧化石墨烯具有优异的性能和结构特性,是聚合物基复合材料的理想增强材料。本课题主要研究了纳米石墨微片(GONP)和多层氧化石墨烯(MGO)的含量(0.5、1、2、3wt%)对环氧树脂(DGEBA/EMI-2,4体系)基体热性能的影响。根据GONP 与MGO的傅里叶变换红外光谱分析可以得到 GONP 与 MGO 中含有羟基(-OH)和羧基(C=O),这些功能团可以促进 GONP 和 MGO 与基体之间的化学作用。利用场发射电子扫描显微镜对GONP 和MGO在环氧树脂基体中的分散状态进行了分析,结果表明 GONP 和 MGO在基体中均匀分散。通过制取氧化石墨烯/DGEBA/EMI-2,4共混物,然后采用铸造法制备氧化石墨烯/环氧树脂复合材料,得到不同含量(0.5、1、2、3wt%)的GONP/环氧树脂复合材料和MGO/环氧树脂复合材料,分别测量其导热率、热膨胀系数、热稳定性,进行对比分析。结果表明3wt%GONP/环氧树脂复合材料具有最高的热稳定性,并且导热率增大到基体的3.2倍,热膨胀系数相比于基体减小了23%。2wt%MGO/环氧树脂复合材料具有最高的热稳定性,并且导热率增大到基体的 2.03倍,热膨胀系数相比于基体减小了 21%。31005 毕业论文关键词 氧化石墨烯 环氧树脂 复合材料 热性能
Title Study on the thermal properties of graphene oxide composites
Abstract Graphene oxide has excellent performance and structural characteristics, which is an ideal polymer matrix composites reinforced materials. This paper studied the GONP and MGO content (0.5,1,2,3wt%) impact on the thermal performance of epoxy resin (DGEBA / EMI-2,4 system) matrix. According to the analysis of fourier transform infrared spectroscopy, we can get GONP and MGO contained hydroxyl (-OH) and carboxyl (C = O). The dispersed state of GONP and MGO in an epoxy resin matrix were analyzed by field emission scanning electron microscopy, the results showed that GONP and MGO are uniformly dispersed. By preparing graphene oxide/DGEBA /EMI-2,4 blends and then graphene oxide/epoxy composites were prepared by casting, getting different content (0.5,1,2,3wt%) of GONP / epoxy composites and MGO/epoxy composites which thermal conductivity, thermal expansion coefficient and thermal stability were measured. The results showed that 3wt% GONP/epoxy composites has the highest thermal stability and the thermal conductivity of the composite material is 3.2 times that of the substrate, the thermal expansion coefficient compared to the matrix is reduced 23%. 2wt% MGO/epoxy composites has the highest thermal stability and the thermal conductivity of the composite material is 2.03 times that of the substrate, the thermal expansion coefficient compared to the substrate is reduced 21%.
Keywords Graphene oxide Epoxy resin Composites Thermal properties
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