摘要
纤维增强环氧树脂基复合材料(FREPC)在实际应用中常因裂纹失效和燃烧破坏而受到限制。文中将自制的DA加合物(DOPO-FU-BMI)与糠胺(FA)配合,引入到环氧树脂DGEBA中,通过热压成型工艺制备了兼具自修复和阻燃双重功能的玄武岩纤维增强环氧树脂基复合材料。结果表明,DA加合物在复合材料中实现了均匀分布,提升了材料的热稳定性和玻璃化转变温度;复合材料通过动态可逆化学键的可逆Diels-Alder(DA)反应实现了裂纹的修复,当DA加合物质量分数为20%时,经2次“冲击-修复”循环后复合材料的强度保留率仍高达92.5%;同时,复合材料发挥了玄武岩纤维的阻燃特性优势,引入DA加合物后使其阻燃性能进一步增强,极限氧指数最高可达44.5%,较未改性复合材料提升25.4%。
Fiber-reinforced epoxy resin matrix composites(FREPC)are often limited in practical applications due to crack failure and combustion damage.In this study,a self-made DA adduct DOPO-FU-BMI in coordination with furfuryl amine(FA)was introduced into the epoxy resin matrix DGEBA,and basalt fiber-reinforced epoxy resin matrix composites with both self-healing and flame-retardant dual functionality were prepared through hot compression molding.The results show that the DA adducts are uniformly distributed in the composites and improve the thermal stability and glass transition temperature of the composites.The crack healing of composites was realized through reversible Diels-Alder(DA)reaction,and the strength retention rate of the composites is as high as 92.5%after two impact-healing cycles with the addition of DA adducts at a level of 20%.Simultaneously,the composites take advantage of the flame retardant properties of basalt fibers(BF),and by introducing the DA adducts,the flame retardant properties are further enhanced,with the limiting oxygen index(LOI)up to 44.5%,which is 25.4%higher than that of the unmodified composites.
作者
陈练辉
董丽楠
廉婷婷
张圣昌
许启彬
姜猛进
刘鹏清
Lianhui Chen;Linan Dong;Tingting Lian;Shengchang Zhang;Qibin Xu;Mengjin Jiang;Pengqing Liu(College of Polymer Science&Engineering,Sichuan University,Chengdu 610065,China;Chongqing Institute of Metrology and Quality Inspection,Chongqing 401121,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2024年第6期115-124,共10页
Polymer Materials Science & Engineering
基金
重庆市市场监督管理局科研计划(CQSJKJ2020005)
达州市科技计划项目(22ZDYF0046)
四川大学-达州校市合作专项资金(2022CDDZ-05)。
作者简介
通讯联系人:刘鹏清,主要从事高性能纤维及复合材料的研究,E-mail:liupq@scu.edu.cn。
