Development of optimized autonomous self-healing systems for epoxy materials based on maleimide chemistry
作者:Stijn Billiet、Wim Van Camp、Xander K.D. Hillewaere、Hubert Rahier、Filip E. Du Prez
DOI:10.1016/j.polymer.2012.03.061
日期:2012.5
Maleimide chemistry involving amines and thiols is presented and evaluated for the design of autonomous self-healing epoxy materials. Model reactions show that amines react rapidly with maleimide compounds at room temperature via the Michael addition reaction. Moreover, thiols and maleimides react readily in the presence of tertiary amines that are present in the epoxy material. The maleimide conjugation
介绍并评估了涉及胺和硫醇的马来酰亚胺化学方法,用于自主自修复环氧材料的设计。模型反应表明,胺在室温下用马来酰亚胺化合物快速反应通过迈克尔加成反应。而且,硫醇和马来酰亚胺在环氧材料中存在的叔胺的存在下容易反应。马来酰亚胺与环氧材料中残留胺的共轭反应可确保在裂缝愈合期间新形成的网络与原始材料发生化学键合,而在裂缝平面中,多官能硫醇与双官能马来酰亚胺反应以填充裂缝区域。使用锥形双悬臂梁(TDCB)测试方法和手动注入愈合剂来评估愈合效率,发现对于EPON 828环氧材料,最大愈合效率高达121%。此外,还评估了顺丁烯二酰亚胺化学试剂对自固化用途的应用,以应对目前用于风轮机叶片灌注的冷固化树脂(RIM树脂)。