基于一维脉管的GFRP自修复复合材料  

Self-Healing Vascularized Glass Fiber Reinforced Polymer Composites

作　　者：赵大方 李斌太 石甲琪 白金鹏 ZHAO Dafang;LI Bintai;SHI Jiaqi;BAI Jinpeng(AVIC Manufacturing Technology Institute,Composites Centre,Beijing 100095,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]中国航空制造技术研究院,复合材料技术中心,北京100095 [2]南京航空航天大学,南京210016

出　　处：《功能高分子学报》2022年第2期188-195,共8页Journal of Functional Polymers

基　　金：国家重点研发计划(2017YFB0703300);航空科学基金(2016ZFV8007)。

摘　　要：以缎纹玻璃纤维织物增强中温固化环氧树脂(SW280A/3218)为原料,用自制的室温固化双组分环氧树脂(XFJ-IV)作为修复剂,采用预埋线去除法制备了基于中空脉管的自修复玻璃纤维增强复合材料(GFRP)。采用超声C扫描、μ-CT等分析了脉管分布和引入方式对复合材料冲击损伤的影响,采用冲击后压缩强度恢复情况表征其修复效果。结果表明,在受到冲击损伤后,脉管中的修复剂能够流到损伤位置对冲击损伤进行一定程度的修复;搭建的冲击损伤自感应修复系统能够实现对冲击损伤后的自修复,修复后复合材料的压缩强度可以从冲击后的202 MPa恢复到211 MPa。Inspired by natural healing processes,a variety of synthetic self-healing materials have been developed,including fiber reinforced polymer(FRP)composites.Therefore,self-healing FRP composites have recently become a focus in the fields.This paper considers the development of autonomic self-healing on glass fiber reinforced polymer(GFRP).Vascularised GFRP was prepared from glass fiber SW280A reinforced epoxy 3218 by removing Nylon fibers after curing.A homemade ambient-curable healing resin formation(diglycidyl ether of bisphenol-A/aliphatic amine)epoxy system has been used as a self-healing agent.It was demonstrated that the post-impact compression strength recovery of the self-healing GFRP by ultrasonic C scan,micro-X-ray computer tomography(μ-CT).In this study,a autonomous,stimulus triggered,self-healing system in GFRP composites was established.Vascules were used as sensing pathway,which detected the introduction of ply delaminations and matrix microcracks following from 6.7 J/mm to 10.0 J/mm low-velocity impact events.Once connectivity between the sensing vascules and microcracks open to the ambient environment is established,the delivery of a healing agent to the damage zone is triggered.Two kinds of samples were prepared with vascules orientation which is parallel and transverse to the 0°orientation,respectively.In both samples,the damages were connected with the vascules following low-velocity impact events.The healing agents flowed into damage position and then the samples would be healed.Using this autonomous healing approach,near full recovery of post-impact compression strength(211 MPa)was achieved compared with compression after impact(202 MPa).The successful implementation of this bioinspired technology could substantially enhance the integrity and reliability of aerospace structures,whilst it would offer benefits through improving performance/weight ratio and extending lifetime.

关 键 词：自修复 脉管 玻璃纤维增强复合材料 复合材料 

分 类 号：TQ342.31[化学工程—化纤工业]