作　　者： (袁新华）; (陈燕秋）; (张倩）; (刘永强）;

机构地区： 江苏大学材料科学与工程学院,江苏镇江212013

出　　处： 《江苏大学学报（自然科学版）》 2017年第4期461-465,471,共6页

摘　　要： 以脲醛树脂为壁材,E-51环氧树脂为芯材,利用原位聚合法制备了自修复环氧树脂微胶囊.采用扫描电镜观察了微胶囊形貌,金相显微镜测量了微胶囊的粒径大小及分布,傅里叶变换红外光谱仪表征了微胶囊化学结构,综合热分析仪分析了微胶囊热稳定性.将E-51微胶囊与潜伏性固化剂邻苯二甲酸酐植入到E-44环氧树脂基体中,制备了自修复微胶囊型环氧树脂复合材料,利用简支梁冲击试验机测试了试样冲击强度和自修复效率.结果表明:制备的微胶囊呈规则球体,囊芯质量分数高,热稳定性好;微胶囊的植入使得环氧树脂复合材料的冲击断面形貌从平整形态向针状斑纹形态转变.当自修复环氧树脂复合材料中微胶囊和潜伏性固化剂的质量分数分别为8.0%和3.0%时,自修复效率达到81.5%. The self-healing urea-formaldehyde resin as epoxy resin microcapsules were synthesized by in-situ shell material and E-51 epoxy resin as core material. polymerization with The morphology of microcapsules was observed by scanning electron microscope （SEM） , and the size and distribution were measured by metallurgical microscopy. The chemical structure of microcapsules was characterized by Fourier transform infrared spectroscope （FFIR）, and the thermal degradation characteristics were determined by thermogravimeter （TGA）. Microencapsulated E-51 epoxy resin healing agent and phthalic anhydride latent curing agent were embedded into E-44 epoxy matrix to prepare self-healing epoxy composites, The impact strength and the self-healing efficiency of composites were measured by Charpy impact tester. The results show that the microcapsules are uniform sphere with high core content and good thermal stability. The fracture of pure epoxy shows brittle performance with mirror fracture surface, while the fracture of composites with microcapsules exhibits hackle marking. In the case of 8.0% microcapsules and 3.0% latent hardener, the optimum self-healing efficiency reaches 81.5%.

关 键 词： 环氧树脂 微胶囊 复合材料 自修复 自修复效率