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摘要聚丙烯腈(PAN)基碳纤维是以PAN纤维为原料，经过预氧化、炭化等工艺制得的碳纤维材料，具有优异的力学性能和耐腐蚀、耐烧蚀、导电导热性好等特点。
预氧化和炭化是制备PAN基炭纤维的重要工序，对炭纤维的性能有很大影响。微波加热是一种快速制备高质量新型材料和使传统材料具有新的性能的技术手段。与传统加热相比，它具有低温快烧，加热均匀，无加热惯性、选择性加热等显著特点。微波加热能明显缓解皮芯结构，从而起到减少缺陷数目和缺陷大小的效果。微波加热使碳化丝的碳化程度更高，并且具有更强的强度和弹性模量。61734
本课题以聚丙烯腈(PAN)基碳纤维为对象，采用微波加热方式，重点考察炭化过程对纤维结构的影响。并与传统加热方式进行比较研究，由此探索加热方式抑制纤维结构缺陷的机制。
毕业论文关键词：微波加热、PAN纤维、碳化
Abstract The polyacrylonitrile (PAN)-based carbon fiber were fabricated by preoxidation and carbonization, based on PAN fiber,own excellent mechanical properties and corrosion resistance, erosion resistance, good conductive thermal conductivity.
For PAN-based carbon fibers, preoxidation and carbonization are important process,they have a great influence on the performance for the carbon fiber. Microwave heating method is a new type of rapid material to make use of microwave heating to sintering method.Compared with traditional heating method, microwave heating are mainly the overall rapid heating, low temperature burning, no heat inertia, and other significant characteristics of selective heating. Microwave heating can obviously relieve skin core structure, thereby reducing the effect of the number of defects and defect size. Microwave carbide wire has a higher degree of carbide and stronger the intensity of the modulus of elasticity .
This topic focuses on the influence for carbonization on the structure of the PAN-fiber by microwave heating,and comparing with the traditional heating mode,explored the suppression mechanism of fiber structure defects through different heating mode.
Keywords: polyacrylonitrile fiber; microwave heating; carbonization
目录
1绪论 6
1.1 聚丙烯腈碳纤维 6
1.2 聚丙烯腈碳纤维的制备 6
1.2.1 原丝制备 6
1.2.2 聚合 7
1.2.3 纺丝 7
1.2.4 预氧化 7
1.2.5 碳化处理 8
1.3 微波加热 8
1.3.1 微波加热技术 8
1.3.2 微波加热的优点 9
1.5 聚丙烯腈碳纤维的研究方向 10
1.6 研究目标 10
1.7 研究内容 10
1.8 测试与表征 10
1.8.1电镜(SEM)和能谱(EDS)分析 10
1.8.2元素分析 11
1.8.3红外分析 11
1.8.4 XRD分析 11
1.8.5 强度、模量分析 11
1.9 研究意义 12
2 实验 12
2.1 微波碳化