中国造纸2024，Vol.43Issue(4)：112-119,8.DOI:10.11980/j.issn.0254-508X.2024.04.013
PBO纤维纸基复合材料的热老化及高温力学性能研究
Heat Aging and High Temperature Mechanical Properties of PBO Fiber Paper-based Composites
摘要
Abstract
Poly-p-phenylene benzobisoxazole(PBO)paper was prepared by wet forming technology,and then impregnated with polyimide(PI)resin to obtain PBO fiber paper-based composite(PBO/PI).Then the PBO/PI was aged at 300 ℃,and the tensile properties were test-ed at 300 ℃.The effects of aging and high temperature on the mechanical properties of PBO/PI and meta-aramid impregnated paper(PMIA/PI)simulated honeycomb lattice wall were analyzed and compared.The results showed that the tensile strength of both PBO/PI and PMIA/PI decreased due to the formation and expansion of microcracks after aging at 300 ℃,whereas the strength of PBO/PI before and after aging was stronger than that of PMIA/PI.The dynamic mechanical properties showed that the storage modulus of PBO/PI before and after aging was greater than that of PMIA/PI,indicating that the rigidity of PBO/PI was greater than that of PMIA/PI,PBO/PI was not easy to deformation at high temperature.The tensile strength and retention ratio of PBO/PI were higher than those of PMIA/PI when they were tested at 300 ℃.The mechanical properties of PBO/PI were better than those of PMIA/PI at room temperature and 300 ℃.The composites prepared by PBO fiber could be used in load-bearing structures and honeycomb parts requiring high deformation resistance and thermal stability.关键词
PBO纤维纸基复合材料/老化/高温测试/力学性能Key words
PBO fiber paper-based composites/aging/high temperature testing/mechanical properties分类
轻工纺织引用本文复制引用
宋梓至,廖思煌,龙金,王宜,熊志远,胡健..PBO纤维纸基复合材料的热老化及高温力学性能研究[J].中国造纸,2024,43(4):112-119,8.基金项目
国家重点研发计划(2021YFB3700104). （2021YFB3700104）
