吕玥蒽,陈正国,丁小马,刁春霞,杨青
LYU Yue-en,CHEN Zheng-guo,DING Xiao-ma,DIAO Chun-xia,YANG Qing

• 1:上海碳纤维复合材料创新研究院有限公司

摘要(Abstract)：

将长度为0.5 mm的短切碳纤维(CF)粉末，分散在质量分数为25%的聚醚砜(PES)/N, N-二甲基甲酰胺(DMF)溶液中，通过浸没沉淀相转化法制备PES面密度相同但短切CF粉末面密度不同的混合膜，研究混合膜对真空辅助灌注成型制备的CF增强环氧树脂复合材料的I型断裂韧性的影响。研究结果表明，短切CF粉末与PES质量比在1∶4和2∶4时，其在PES溶液中分散良好，所制备的混合膜在120℃环氧树脂中可在13 min溶解完全。当混合膜中短切CF粉末的面密度为8.3 g/m~2时，所制备的复合材料的I型断裂韧性值最高；相比于未增韧复合材料的I型断裂韧性的起始值和增长值分别提升29.3%和34.8%，相比于纯PES薄膜增韧样的起始值和增长值分别提升6.9%和5.2%。
The short carbon fiber(CF) powder with length of 0.5 mm were dispersed in a mass fraction of25% polyethersulfone(PES)/N,N-dimethylformamide(DMF) solution. The mixed films with the same PES surface density but different short CF powder surface density were prepared by immersion precipitation phase conversion method. The effects of mixed films on the type I fracture toughness of CF reinforced epoxy resin composites prepared by vacuum assisted perfusion molding were investigated. The results show that the short CF powder was well dispersed in PES solution when the mass ratio of CF powder to PES was 1∶4and 2∶4, and the film could be completely dissolved in 120 ℃ epoxy resin in 13 min. When the surface density of short CF powder in the mixed film is 8.3 g/m~2, the type I fracture toughness of the composite is the highest. Compared with untoughened composites, the initial value and growth value of type I fracture toughness increased by 29.3% and 34.8%, respectively, and compared with pure PES film toughened composites, the initial and growth value increased by 6.9% and 5.2%, respectively.

关键词(KeyWords)： CF增强环氧树脂复合材料;层间增韧;聚醚砜;短切CF粉末
CF reinforced epoxy resin composites;interlaminar toughening;polyethersulfone;short CF powder

Abstract:

Keywords:

基金项目(Foundation): 上海市科委项目(19DZ1100800)

作者(Author): 吕玥蒽,陈正国,丁小马,刁春霞,杨青
LYU Yue-en,CHEN Zheng-guo,DING Xiao-ma,DIAO Chun-xia,YANG Qing

DOI: 10.16090/j.cnki.hcxw.2023.05.003

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