航天贮箱用树脂基复合材料与液氧交互作用机理及性能演变规律

It is urgent to break through the two key problems of liquid oxygen compatibility and cryogenical temperature toughness of resin matrix composites in the development of composite liquid oxygen tanks for space vehicles. Through systematic research, we try to find out the evolution rule of resin matrix under liquid oxygen; try to clarify the combined effect of molecular structure on the liquid oxygen compatibility and cryogenical temperature toughness, then reveal the interaction mechanism between resin matrix and liquid oxygen; try to find out the evolution rule of resin matrix composites under liquid oxygen; try to analyze the relationship between liquid oxygen compatibility of resin matrix and liquid oxygen compatibility of composites; tyr to analyze the relationship between cryogenical temperature toughness of resin matrix and cryogenical temperature toughness of composites; then try to reveal the interaction mechanism between resin matrix composites and liquid oxygen; try to establish a dual "structure-process-property" relationship between liquid oxygen compatibility and cryogenical temperature toughness of composites; try to master the design method of liquid oxygen compatible composites; try to promote the leaping development of China's aerospace composite liquid oxygen tank technology.

针对航天运载器复合材料液氧贮箱研制对突破树脂基复合材料液氧相容性和低温韧性两大核心难题的迫切需求，通过系统研究工作，探明树脂基体在液氧下的性能演变规律，明确分子结构对树脂液氧相容性和低温韧性的综合影响，揭示树脂基体与液氧交互作用机理；探明树脂基复合材料在液氧下的性能演变规律，梳理树脂基体液氧相容性与其复合材料液氧相容性、树脂基体低温韧性与其复合材料低温韧性之间的关系，揭示树脂基复合材料与液氧交互作用机理，建立复合材料液氧相容性和低温韧性的双重“结构-工艺-性能”关系，掌握液氧相容性低温复合材料成分结构与制造工艺设计方法，推动我国航天复合材料液氧贮箱技术的跨越式发展。

针对航天复合材料液氧贮箱的研制需求，经过系统的研究和探索，对航天贮箱用树脂基复合材料与液氧交互作用机理及性能演变规律有了深入的认识，揭示了树脂基复合材料与液氧交互作用机理，建立复合材料液氧相容性和低温韧性的双重“结构-工艺-性能”关系；研制出满足液氧相容性要求的改性环氧树脂基复合材料和杂萘联苯聚芳醚类树脂基复合材料，相关研究成果已经应用于航天复合材料液氧贮箱原理样机的研制并成功通过地面考核试验。