工艺与制造英文2022被引 6
纳米纤维织物在热塑性碳纤维复合材料韧性增强中的应用
Nanofiber veil applied in toughness enhancement of thermoplastic carbon fiber composites
Mingjun Shi, Shinya Takahashi, Akiyoshi Takeno, Asami Nakai · Mechanical and Civil Engineering Division, Graduate School of Engineering, Gifu University, Japan
摘要整理
本研究以PMMA树脂为基体、聚酰胺电纺纳米纤维织物为增韧层，制备了热塑性碳纤维复合材料（CFRTP），并系统研究了纳米纤维织物对层间韧性的增强效果。通过改变功能单体羟乙基丙烯酰胺（HEAA）的摩尔浓度（0~5 mol%）与甲基丙烯酸甲酯进行共聚，调控树脂与纳米纤维及碳纤维的界面粘结性能，进而影响复合材料的断裂行为和断裂机制。采用Mode-Ⅰ和Mode-Ⅱ层间断裂韧性测试方法评估纳米增韧效果。结果表明：Mode-Ⅰ断裂韧性随HEAA含量增加（0~5 mol%）呈先降后升的趋势，这与裂纹扩展路径改变及桥接机制转变相关；5 mol% HEAA共聚的CFRTP样品性能最优，起始韧性和扩展韧性分别提高17.6%和28%；Mode-Ⅱ加载下，断裂韧性表现为先升后降的特征，这是由于纳米增韧基体层形成多层微裂纹所致，3 mol% HEAA共聚的CFRTP样品表现出良好的改善效果，起始韧性和扩展韧性分别提高137%和147%。研究结果为热塑性复合材料的界面设计和韧性优化提供了参考。
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