各向同性石墨烯三维骨架聚合物基复合材料的构筑及其增强机制研究

项目名称： 各向同性石墨烯三维骨架聚合物基复合材料的构筑及其增强机制研究

项目编号： No.51503052

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 彭庆宇

作者单位： 哈尔滨工业大学

项目金额： 20万元

中文摘要： 石墨烯增强聚合物基复合材料因其轻质、高强及多功能性的优势而有望应用于军事、航空航天等领域。然而，石墨烯在聚合物中很难实现高密度均匀分散，同时界面结合较弱，载荷不能有效地由基体向增强体传递而影响其性能的发挥。针对分散与界面难题，本项目提出以各向同性石墨烯三维骨架为模板，采用真空辅助灌注技术制备石墨烯三维骨架增强复合材料，实现石墨烯在聚合物中高密度、高均匀分散，初步研究结果显示复合材料力学性能增强效果显著。同时，申请人基于在复合材料领域的研究经验，提出树枝状分子原位改性石墨烯三维骨架， 实现增强体与基体的良好润湿与化学连接，有望进一步提升复合材料性能。本项目将开展各向同性石墨烯三维骨架微观结构调控，界面改性及其复合材料制备研究，深入挖掘石墨烯三维骨架微观结构与复合材料力学性能的关系，建立石墨烯三维骨架聚合物基复合材料的力学模型，揭示这一复合材料的增强机制，为该高性能复合材料的应用提供理论支撑。

中文关键词： 石墨烯；聚合物复合材料；增强增韧；机械强度；增韧机理

英文摘要： Graphene reinforced polymer composites have the potential to be widely applied in the field of military and aerospace due to their light weight and high performance. However, it is difficult for graphene to achieve uniform dispersion in polymer. At the same time, the interfacial properties between graphene and polymer are weak so that the load could not effectively transfer from matrix to reinforcement. The graphene dose not exert its advantage of the excellent mechanical properties to the most. For the dispersion and interface problems, based on our previous research work, here we propose to prepare three-dimensional graphene framework reinforced polymer composites by Seemann Composites Resin Infusion Molding Process, using a isotropic three-dimensional graphene framework as a template. By this way, the graphene dispersion of high-density and high uniformity in polymer was realized. The mechanical properties of the three-dimensional graphene framework reinforced polymer composites increased obviously. At the same time, based on the research experience in the field of composites interface, we propose to in situ chemically graft PAMAM dendrimers onto three-dimensional graphene framework. This could remarkably improve the interfacial propertise between graphene and polymer. We will focus on the microstructure control of three-dimensional graphene framework, composites interface modification and preparation of isotropic three-dimensional graphene framework reinforced polymer composites. The relationship between the microstructure of three-dimensional graphene framework and the mechanical properties of composites will be digged up. The mechanical model of three-dimensional graphene framework reinforced composites will be established, and the enhancement mechanism of this new composites will be studied, which provide a theoretical bases for the application of this high-performance composites.

英文关键词： Graphene;Polymer composites;Enhancement and toughening;Mechanical properties;Enhancement mechanism