新型生物基亚胺固化剂及其固塑性复合材料的性能  

Properties of fiberglass composite using epoxy vitrimer matrix cured by a novel bio-based imine curing agen

作　　者：盛国梁 宁娜 周刚 于亮亮 魏毅 SHENG Guoliang;NING Na;ZHOU Gang;YU Liangliang;WEI Yi(College of Textiles,Center for Civil Aviation Composites,1.Donghua University,Shanghai,China;Zhejiang Baihe Advanced Composite,Co.,Ltd.,Hangzhou,Zhejiang,China)

机构地区：[1]东华大学纺织学院,民用航空复合材料协同中心,上海 [2]浙江百合航太复合材料有限公司,浙江杭州

出　　处：《东华大学学报（自然科学版）》2024年第4期91-97,共7页Journal of Donghua University(Natural Science)

摘　　要：鉴于汽车制造中热固性树脂基复合材料不溶不熔,回收再利用问题严峻,使用生物基香兰素和4,4-二氨基苯砜合成一种含有动态亚胺键的固化剂,将其用于固化环氧树脂,制备可重复成型可回收的新型固塑性复合材料。研究表明:该复合材料具有优异的力学性能,拉伸强度和拉伸模量分别为670MPa和29GPa,弯曲强度和弯曲模量分别为752MPa和27GPa,短梁剪切强度为55MPa;与复合材料BAC449相比,不仅具有更优异的力学性能,而且阻燃性能达UL-94V-0级;由于该固塑性复合材料中含有动态亚胺键,树脂可以被降解,进而实现回收利用,符合低碳环保的发展方向,在新能源汽车领域具有广泛的应用前景。In view of the serious problem of recycling and insolubility of thermosetting resin matrix composites in automobile manufacturing,a curing agent containing dynamic imine bond was synthesized by using biovanillin and 4,4-diaminophenylsulfone.It was further used to cure epoxy resins into a vitreous matrix for fiberglass composite that could be reprocessed and recycled.The composite shows excellent mechanical properties,with a tensile strength and modulus of 670 MPa and 29 GPa,flexural strength and modulus of 752 MPa and 27 GPa,and shear strength of 55 MPa,which are comparable to the commercial battery pack composite material such as BAC 449.This new vitrimer-based composite has better mechanical properties,and its flame retardant can reach UL-94 V-0 level.In addition,owing to the nature of dynamic imine bonds,this vitrimer-based composite can be chemically degraded so that the fiber and resin in the composite can be recycled and reused,helping with carbon reduction and environmental protection.It has potential application in the manufacturing of composite covers of battery packs for electric vehicles.

关 键 词：固塑性复合材料 生物基可回收 动态亚胺固化剂 环氧树脂 

分 类 号：U465.6[一般工业技术—材料科学与工程]