摘要
传统聚氨酯增韧环氧树脂以有机溶剂为基础,由于其挥发性有机物含量高,在生产安全性和环境保护等方面存在较多问题,其应用正逐步受到限制。目前国内外对水性体系中环氧树脂增韧技术的研究及成果较少,水性环氧树脂仍存在脆性较大、耐水性及耐候性不足等问题,因此研究水性聚氨酯增韧环氧树脂具有重要的工程意义和广阔的应用前景。本文在分析溶剂型环氧树脂增韧方法的基础上,综述了国内外水性聚氨酯增韧环氧树脂的制备原理及应用进展,并讨论了聚氨酯增韧环氧树脂乳液制备技术的设计思路,分析了聚氨酯柔性纳米粒子与无机刚性纳米粒子协同增韧水性环氧树脂的机理,探讨了固化剂及固化工艺等对增韧水性环氧树脂性能的影响,最后介绍了增韧水性环氧树脂用于工程结构防护与修复领域的最新进展。
Traditional polyurethane toughened epoxy resin is based on organic solvents.Due to its high content of volatile organic compounds,there are many problems in production safety and environmental protection,and its application is gradually being restricted.At present,there are few researches and achievements on the toughening technology of epoxy resin in waterborne systems at home and abroad,and waterborne epoxy resins still have problems such as high brittleness,insufficient water resistance and weather resistance.Therefore,the study of waterborne polyurethane toughened epoxy resin has important engineering significance and broad application prospects.Based on the analysis of solvent-based epoxy resin toughening methods,this article reviews the preparation principles and application progress of waterborne polyurethane toug-hened epoxy resins at home and abroad,and discusses the design ideas of the preparation technology of polyurethane toughened epoxy emulsions.The mechanism of polyurethane flexible nanoparticles and inorganic rigid nanoparticles synergistically toughening waterborne epoxy resin is analyzed,and the effect of curing agent and curing process on the performance of toughened waterborne epoxy resin is discussed.Finally,the latest development of toughened waterborne epoxy resin used in the protection and repair of engineering structures is introduced.
作者
陈阳
刘志勇
管焓宇
钱百惠
CHEN Yang;LIU Zhiyong;GUAN Hanyu;QIAN Baihui(College of Civil Engineering,Yantai University,Yantai 264000,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第13期13205-13214,共10页
Materials Reports
基金
国家自然科学基金(51678512)
烟台大学研究生创新基金(YDYB2005)。
关键词
水性
环氧树脂
聚氨酯
增韧改性
waterborne
epoxy resin
polyurethane
toughening modification
