广州化学2023，Vol.48Issue(6)：8-12,56,6.DOI:10.16560/j.cnki.gzhx.20230620
基于动态受阻脲键的可修复环氧树脂的制备及性能
Preparation and Properties of Self-healing Epoxy Resin Based on Dynamic Hindered Urea Bonds
秦静静 1梁利岩 2刘家铭 3王定松 4施敏5
作者信息
- 1. 中国科学院广州化学研究所,广东 广州 510650
- 2. 中国科学院大学,北京 100049
- 3. 中国科学院新型特种精细化学品工程实验室,广东 广州 510650
- 4. 国科广化韶关新材料研究院,广东 南雄 512400
- 5. 国科广化精细化工孵化器(南雄)有限公司,广东 南雄 512400
- 折叠
摘要
Abstract
An epoxy curing agent based on large hindered urea bond was synthesized using hindered diamine and isocyanate as raw materials,and a self-healing epoxy thermosetting resin with thermal reversible structure stability based on large hindered urea bond was successfully prepared by using 4,4'-diaminodiphenylmethane(DDM)as cross-linking agent.The tensile properties,dynamic mechanical analysis(DMA),thermal gravimetric analysis(TGA),self-healing properties and reprocessability of the synthesized epoxy resin with hindered urea bond were tested.The tensile strength reached 68.62 MPa,and the elongation at break reached 6.93%,effectively overcoming the brittleness issue of epoxy resins while maintaining relatively superior mechanical properties.Therefore,it has practical application value.At the same time,this new material can achieve rapid healing within 10 min at 120℃.The hindered urea bond endowed the epoxy thermosetting material with excellent reprocessability,self-healing ability,weldability,reshaping capability,recyclability,and shape memory effect.Therefore,introducing the hindered urea bond into thermosetting epoxy resin provides a feasible strategy for preparing epoxy thermosetting resin with high mechanical strength and self-healing efficiency in an economical and efficient way.关键词
受阻脲键/自修复/可再加工/高机械性能/环氧树脂Key words
hindered urea bond/self-healing/reprocessability/high mechanical properties/epoxy resin分类
化学化工引用本文复制引用
秦静静,梁利岩,刘家铭,王定松,施敏..基于动态受阻脲键的可修复环氧树脂的制备及性能[J].广州化学,2023,48(6):8-12,56,6.
