基于无壁型微脉管的光能损伤自修复复合材料  

Light-energy Self-healing Composites Based on Wall-less Microvasculature

作　　者：李鹏 杜艺博 黄培炜 丁瀛 刘根柱 LI Peng;DU Yibo;HUANG Peiwei;DING Ying;LIU Genzhu(School of Mechatronics&Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学机电与车辆工程学院,南昌330013

出　　处：《材料导报》2022年第2期200-204,共5页Materials Reports

基　　金：国家自然科学基金(51365012,52165016)。

摘　　要：针对损伤自修复研究领域中有壁型载体与双组分修复体系存在的力学兼容性不佳、自修复实时性差的不足,提出了基于无壁型微脉管的光能损伤自修复复合材料研究,旨在保证微脉管载体与材料力学兼容性的条件下,以实现对复合材料光能损伤的实时自修复。研究首先以管密度、沿程水头损失和微脉管体积分数为目标函数,采用非劣分层遗传算法对微脉管的直径和数量进行优化;其次,采用真空辅助树脂传递模塑成型工艺和失模法,研制无壁型微脉管,并以单组分的短波光固化粘结剂作为光修复剂,设计了自修复复合材料;最后,以疲劳寿命作为评价自修复复合材料的力学兼容性和光修复性能指标。结果表明:通过载体的拓扑结构优化和无壁型设计,可降低微脉管埋入对材料原始性能的影响(平均疲劳寿命下降6.19%,平均最大静拉力下降4.48%),有助于改善材料的力学兼容性;光能损伤自修复不仅可保证理想的损伤自修复性能(平均疲劳寿命提高37.86%),而且具有良好的实时性,可快速完成损伤自修复(修复时间短于11.62 min)。In the field of damage self-healing research,the wall-type carrier and the two-component repair system have the lack of poor mechanical compatibility and poor real-time self-healing.Based on the wall-less microvasculature,the research on the light-energy self-healing composite material is proposed in order to realize the real-time light-energy self-healing of composite material under the condition of ensuring the compatibility between the microvascular carrier and the mechanics of materials.Firstly,the diameter and number of microvasculature are optimized by using non-dominated sorting genetic algorithmⅡ(NSGA-Ⅱ)with the objective functions of tube density,water head loss and percentage of microvascular volume.Secondly,vacuum-assisted resin transfer molding process and mold loss method are used to develop wall-less microvasculature,and single-component short-wave photocuring binder is used as light-repairing agent to design self-healing composite material.Finally,the fatigue life is used to evaluate the mechanical compatibility and light repair properties of self-healing composites.The result shows that through the topological structure optimization and the design of wall-less carrier,the effect of microvascular embedding on the original properties of the material can be reduced(the average fatigue life decreased by 6.19%,and the average maximum static tension decreased by 4.48%),and it is helpful to improve the mechanical compatibility;light energy self-healing can not only ensure the ideal self-healing performance(average fatigue life increased by 37.86%),but also have good real-time performance,and it can quickly complete damage self-healing(repair time is less than 11.62 min).

关 键 词：自修复 非劣分层遗传算法 无壁型微脉管 光修复剂 疲劳寿命 

分 类 号：TB381[一般工业技术—材料科学与工程] TB34