石墨烯对碳纤维增强聚醚醚酮复合材料性能的影响

发布时间：2018-01-02 06:00

本文关键词：石墨烯对碳纤维增强聚醚醚酮复合材料性能的影响　出处：《长春工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：作为特种工程热塑性塑料,聚醚醚酮具有优异的综合性能,如:高机械性能、耐磨性、耐疲劳性、耐药性、耐热性、耐辐照性、阻燃性、柔韧性和加工成型性等。碳纤维具有许多卓越的性能如:优异的力学性能,高比模量和比强度、耐高温、耐磨擦、耐腐蚀、抗疲劳、低密度、低热膨胀系数、易纺织加工性、高电磁屏蔽性、高导热和导电性等。因此,碳纤维被当作增强材料广泛用于聚合物基复合材料。碳纤维增强聚醚醚酮复合材料进一步提高了聚醚醚酮的耐摩擦磨损性能、热性能和机械性能。石墨烯被称为目前为止世界上最薄、强度最大、导电性最好的材料,同时还具有超高导热系数、润滑性好、比表面积大、阻燃性好等优点。为了更进一步扩大碳纤维增强聚醚醚酮复合材料在航空航天、电子电器、石油化工等领域的应用,本文在碳纤维增强聚醚醚酮复合材料中添加了不同含量的石墨烯,并研究了含量对复合材料形貌、热导率、摩擦性能、相变温度、热稳定性、机械性能的影响。本文首先采用化学氧化还原法成功制备了石墨烯,然后用球磨法和模压成型法制备得到不同石墨烯含量的石墨烯/聚醚醚酮/碳纤维复合材料。扫描电镜照片显示,石墨烯均匀地分散在聚醚醚酮中。热导率测试结果表明,当添加0.7 wt%的石墨烯时,复合材料的热导率有了迅速的升高,比未添加石墨烯的复合材料的热导率提高了35.5%。摩擦磨损试验结果显示,石墨烯填充对复合材料起到了很好的减摩耐磨作用。在本研究范围内,添加0.7 wt%的石墨烯对复合材料的减摩耐磨起到了最好的效果,摩擦系数和磨损率分别为0.37和6.4×10-6 mm3/N m,耐磨损性能比未添加石墨烯的复合材料提高了70.9%。同时,石墨烯/聚醚醚酮/碳纤维复合材料还具备了优异的热性能和机械性能。因此,石墨烯填充后的复合材料比传统的碳纤维增强聚醚醚酮复合材料体现出更好的综合性能。
[Abstract]:As a special engineering thermoplastics, peek has excellent comprehensive properties, such as high mechanical properties, wear resistance, fatigue resistance, resistance, heat resistance, radiation resistance, flame retardancy, flexibility and processability. Carbon fiber has many excellent properties such as excellent mechanical properties, high modulus and specific strength, high temperature resistance, abrasion resistance, corrosion resistance, anti fatigue, low density, low thermal expansion coefficient, easy textile processing, high electromagnetic shielding property, high thermal and electrical conductivity. Therefore, carbon fiber as reinforced material widely used in polymer matrix composites. Carbon Fiber Reinforced PEEK composite material to further improve the friction and wear properties of PEEK, thermal and mechanical properties. Graphene is called by far the world's most thin, maximum strength, conductivity best, but also has high thermal conductivity, good lubricity, high specific surface area And good flame retardance. In order to further expand the Carbon Fiber Reinforced PEEK composite materials in aerospace, electronics, petrochemical and other fields of application, in this paper, Carbon Fiber Reinforced PEEK Composite added with different content of graphene, and study content on composite morphology, thermal conductivity, friction properties, phase transformation the temperature, thermal stability, mechanical properties. Chemical oxidation of graphene were successfully prepared by the first reduction, followed by ball milling and molding were prepared with different content of graphene graphene / PEEK / carbon fiber composite materials. The SEM micrographs showed that the graphene uniformly dispersed in peek. Thermal conductivity the rate of test results show that when the graphene containing 0.7 wt%, the thermal conductivity of the composite has been increasing rapidly, the thermal conductivity of composite material than without the addition of graphene's rate. High 35.5%. friction wear test results show that the graphene was filled to the antifriction effect on composite materials. Within the scope of this study, graphene added 0.7 wt% has the best effect on composite antifriction play, friction coefficient and wear rate were 0.37 and 6.4 * 10-6 mm3/N m, 70.9%. and improve the abrasion resistance than the composite without adding graphene, graphene / PEEK / carbon fiber composite material has excellent thermal and mechanical properties. Therefore, the composite material graphene after filling than traditional Carbon Fiber Reinforced PEEK composite shows better comprehensive performance.

【学位授予单位】：长春工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB33

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