纳米碳包覆短碳纤/短玻纤增强聚醚砜复合材料的力学和热学性能

Polyethersulphone (PES) is an important type of special engineering plastics. In order to broaden its applications in the important industries of automobile and sports etc., its mechanical properties including tensile, flexural and tribological performance etc. and thermal properties including thermal expansion coefficient etc. have to be enhanced. In this proposal, the mechanical and thermal properties of PES composites reinforced by nano-carbon-coated short carbon fibers (SCFs) and short glass fibers (SGFs) will be systematically investigated. Here the nano-carbon mainly refers to carbon nanotubes (CNTs) and graphene oxide (GO) etc. First, the CNTs and GO will be employed as surface sizing agents to treat the SCFs and SGFs by a facile physical absorption method. Then, the nano-carbon-coated-short fiber reinforced PES composites will be prepared using the extrusion compounding and injection molding techniques. It is expected that the CNT and GO coatings on SCFs and SGFs will enhance the SCF/PES and SGF/PES interfacial adhesion and thus will lead to the enhancements in the mechanical and thermal properties of the PES composites. The effects of the CNT and GO coating content/quality and the SCF/SGF hybridization on the mechanical and thermal properties of the PES composites will be examined in detail and the relevant mechanisms will be explored about these effects via the morphological observation of the microstructure of the composites. The knowledge to be obtained in this proposal will form a solid base for achieving high overall performance short fiber reinforced polyethersulfone composites which have great potential applications in the important industries of automobile and sports etc.

聚醚砜(PES)是一种重要的特种工程塑料。为了拓展它在汽车和体育等重要工业领域的应用，需改善其拉伸、弯曲和摩擦磨损等力学性能和热膨胀系数等热学性能。该项目拟对纳米碳包覆短碳纤(SCF)和短玻纤(SGF)增强PES复合材料的力学和热学性能进行系统研究，这里纳米碳指碳纳米管(CNTs)和氧化石墨烯(GO)。首先利用简单的物理吸附法将CNTs和GO包覆在SCF和SGF表面上，然后利用挤出和注塑成型技术制备出包覆纳米碳的短纤增强PES复合材料。CNT和GO的包覆可望改善SCF/PES和SGF/PES的界面强度，从而改善PES复合材料的力学和热学性能。将详细考察CNT和GO包覆含量/质量及SCF/SGF超混杂对PES复合材料的力学和热学性能的影响，并结合微观结构观察结果，探索这些影响的相关机理。获得的有关知识将为制得在汽车和体育等工业领域有巨大应用潜力的高综合性能短纤增强聚醚砜复合材料奠定坚实基础。

本项目按照研究计划，对纳米碳包覆短碳纤(SCF)和短玻纤(SGF)增强PES复合材料的力学和热学性能进行系统研究，首先利用简单的物理吸附法将CNTs和GO包覆在SCF和SGF表面上，然后利用挤出和注塑成型技术制备出包覆纳米碳的短纤增强PES复合材料。CNT和GO的包覆极大改善了SCF/PES和SGF/PES的界面强度，从而改善PES复合材料的力学（如拉伸强度、弯曲强度、摩擦磨损性能等）和热学性能（如热导率、线膨胀系数等）。系统研究了CNT和GO包覆含量/质量及SCF/SGF超混杂对PES复合材料的力学和热学性能的影响，并结合微观结构观察结果，确立包覆后的短碳纤和短玻纤的增强增韧机理以及它们的协同作用。获得的有关知识将为制得在汽车和体育等工业领域有巨大应用潜力的高综合性能短纤增强聚醚砜复合材料奠定坚实基础。