优化固化工艺提高石墨烯复合材料热性能的研究
时间:2018-05-28 10:55 来源:毕业论文 作者:毕业论文 点击:次
| 摘要石墨烯的分子结构呈准二文片层状，它具有独特的导电性，导热性，力学性能，光学性能和电学性能，故其在聚合物改性中得到了广泛应用。近年来，人们开始逐渐重视以石墨烯及其氧化衍生物作为纳米填料的复合材料，因此，对石墨烯复合材料的性能也相应提出了更高的要求：发展高导热，高热稳定性及良好综合性能的石墨烯复合材料是未来的发展趋势。23421 本文通过用两种固化动力学方法（方法C和方法V）来分析氧化石墨烯对环氧树脂基体固化反应的影响，并研究了解特定含量的氧化石墨烯对基体固化过程中每个阶段的不同影响，分析其内在机理，据此对固化工艺做相应的改进，并对改进后得到的复合材料热性能（如热导率）进行测试和相互对比，结果表明，当后加热温度增加30摄氏度时，最终复合材料的热导率是纯环氧树脂热导率的2.03到2.96倍。 关键词 石墨烯 多层氧化石墨烯 两种固化动力学方法 热性能 毕业设计说明书（毕业论文）外文摘要 Title Optimize the curing process to improve graphene composite thermal properties Abstract Graphene, has two-dimensional lamellar molecular structure, and with its outstanding conductivity, thermal conductivity, mechanical properties, optical properties, and electrical properties, nowadays has been widely used in polymer modification. Polymer nanocomposites with Graphene and graphene oxide derivatives as its nano-fillers, has been track people’s attention in recent years. Therefore, the demands of developing higher thermal conductivity, higher thermal stability and better overall performanced graphene composites has been increased. In this work, two curing kinetics’ methods (method-C and method-V) were used to analyzing the impact of graphene oxide (GO) to the curing reaction of epoxy matrix, research to understand the impact of the specific content of GO matrix curing process for each stage, and improve the curing process accordingly, compare the thermal properties (thermal conductivity, for example) of the improved composites with the traditional ones, obtain the optimal curing process to achieve the best thermal performance, with only a small amount (30˚C) increase of post-heating temperature, thermal conductivity increases from 2.03 to 2.96 times that of epoxy。 Keywords Graphene MGO Two curing kinetics methods Thermal performance 目 次 1 绪论 1 1.1 简介 1 1.2 石墨烯的制备与性能 2 1.2.1 石墨烯材料的制备 2 1.2.2 石墨烯的性能 4 1.3氧化石墨烯的制备与性能 5 1.3.1氧化石墨烯的制备 5 1.3.2 氧化石墨烯的性能 5 1.4石墨烯复合材料的制备 6 1.4.1溶液共混法 6 1.4.2原位聚合法 6 1.4.3熔融共混法 7 1.5 石墨烯基对树脂复合材料固化反应和热性能的研究及动力学研究 7 1.5.1石墨烯基对树脂复合材料固化反应和热性能的研究 7 1.5.2 石墨烯基填充聚合材料的动力学研究 8 2 MGO聚合物复合材料的制备与性能以及动力学研究 11 2.1实验材料 11 2.2 MGO/DGEBA/EMI-2,4混合物的制备 12 (责任编辑：qin) |