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摘要本研究采用原位聚合法分别制备了不同刚性氧化石墨烯纳米片（r-GONPs）含量（0.5、1、2、3wt%）的r-GONPs/环氧树脂复合材料，并研究了r-GONPs含量对环氧树脂（DGEBA/EMI-2,4体系）基体热性能的影响。利用广角X射线衍仪、场发射扫描电子显微镜和透射电子显微镜对r-GONPs在基体中的剥离和分散状态进行了表征，结果表明r-GONPs在环氧树脂基体中被进一步剥离并且分散均匀。对不同含量的r-GONPs/环氧树脂复合材料进行导热率、热膨胀系数的测量以及通过差示扫描量热法对玻璃化转变温度进行进一步探究，结果表明，随着r-GONPs填充量的增加，3wt% r-GONPs/环氧树脂复合材料具有最佳热性能，导热率增大到最大值0.73W/m·K（纯环氧树脂的~3.5倍），并且在固化阶段，玻璃化转变温度最大，热膨胀系数最小，约为5.8×10-5/K（比纯环氧树脂减小~35%）。41885
毕业论文关键词 氧化石墨烯 环氧树脂 复合材料 热性能
毕业设计说明书外文摘要
Title：The effect of graphene oxide nanoplates on the thermal properties of polymer composite materials
Abstract
In this study the r-GONPs/epoxy composites with different r-GONPs loading (0.5, 1,2,3wt%)were prepared via insitu polymerization ,and the effects of r-GONPs loading on the thermal properties of the epoxy matrix (DGEBA/EMI-2,4 system)were analyzed. The exfoliation level and dispersion state of r-GONPs in the epoxy matrix were characterized by WXRD、FESEM and TEM.The results suggest that the r-GONPs are further exfoliated and uniformly dispersed in the epoxy matrix.The thermal conductivity and the coefficient of thermal expansion of r-GONPs/ epoxy composites with different contents were measured and the glass transition temperature of it was further explored by means of differential scanning calorimetry.The results show that with the increasing r-GONPs content, 3wt% r-GONPs/ epoxy composites have the best thermal performance and the thermal conductivity increases to a maximum value of 0.73W/m·K (3.5 times that of pure epoxy resin).During the curing stage, 3wt% r-GONPs/ epoxy composites also have the maximum glass transition temperature and the minimum coefficient of thermal expansion(5.8×10-5/K ,35% reduction compared to the epoxy).
Keywords graphene oxide epoxy composite thermal performance
目次
1 绪论 1
1.1 纳米石墨微片 1
1.2 复合材料的制备方法 3
1.3 填充型复合材料导热率的影响因素 6
1.4 石墨烯基复合材料热性能的研究进展 10
1.5 本实验研究内容 13
2 实验 15
2.1 实验原料和器材 15
2.2 实验方法 15
2.3 测试方法 16
3 结果与分析 18
3.1 环氧树脂基体中r-GONPs的剥离程度和分散状态 18
3.2 r-GONPs强化环氧树脂导热性能的优势 20
3.3 DSC 20
3.4 热膨胀系数 22
结论 23
致谢 24
参考文献 25
1 绪论
1.1 纳米石墨微片