中国塑料 ›› 2021, Vol. 35 ›› Issue (11): 15-23.DOI: 10.19491/j.issn.1001-9278.2021.11.003

• 材料与性能 • 上一篇    下一篇

中高温酸酐固化环氧树脂的自修复研究

杨智韬1,2, 方星磊1,2, 赖少川3(), 熊道英3, 王垚3, 张晨3, 何和智1,2(), 张鹤1,2()   

  1. 1.华南理工大学,聚合物新型成型装备国家工程研究中心,广州 510641
    2.华南理工大学,聚合物成型加工工程教育部重点实验室,广州 510641
    3.国家石油天然气管网集团华南公司,广州 510620
  • 收稿日期:2021-06-09 出版日期:2021-11-26 发布日期:2021-11-23
  • 基金资助:
    国家自然科学基金青年项目(51903090)

A Self⁃healing Epoxy Cured with Anhydride at Middle and High Temperatures

YANG Zhitao1,2, FANG Xinglei1,2, LAI Shaochuan3(), XIONG Daoying3, WANG Yao3, ZHANG Chen3, HE Hezhi1,2(), ZHANG He1,2()   

  1. 1.Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing,South China University of Technology,Guangzhou 510641,China
    2.National Engineering Research Center of Novel Equipment for Polymer Processing,Key Laboratory of Polymer Processing Engineering (SCUT),Ministry of Education,South China University of Technology,Guangzhou 510641,China
    3.National Petroleum Pipeline Group South China Corporation,Guangzhou 510620,China
  • Received:2021-06-09 Online:2021-11-26 Published:2021-11-23
  • Contact: LAI Shaochuan,HE Hezhi,ZHANG He E-mail:laisc@pipechina.com.cn;pmhzhe@scut.edu.cn;zhanghe@scut.edu.cn

摘要:

基于兼具修复效率高、兼容性好、热稳定性较好等优点的微胶囊化环氧?胺自修复体系,研究了其在一种中高温(100~170 ℃)酸酐固化的商用环氧树脂中的自修复性能。首先研究了所选用修复剂的热稳定性及其在微胶囊化后在树脂基体中的热稳定性,进而采用人工预混注入修复剂的方法研究了所选用修复剂与酸酐固化环氧树脂的兼容性,最后在树脂基体中加入双组分微胶囊研究了该微胶囊化环氧-胺自修复酸酐固化环氧树脂的自修复性能,并探究了微胶囊比例与浓度及树脂固化程序对自修复性能的影响。结果表明,所选用的修复剂体系热稳定性较好,微胶囊化后在树脂基体中热稳定性较高,适用于酸酐中高温固化的环氧树脂的自修复,优化后的自修复效率较高,超过80 %。

关键词: 酸酐, 环氧树脂, 微胶囊, 自修复

Abstract:

In light of the microencapsulated epoxy-amine self?healing system with high healing performance, good compati-bility, and relatively good thermal stability, this paper developed a self?healing commercial epoxy resin cured with anhydride at middle and high temperatures ranging from 100 to 170 ℃. The thermal stabilities of the epoxy and amine as healants were extensively evaluated before and after microencapsulating them in the resin matrix. The compatibility of the cured healants with the anhydride?cured epoxy was quantitatively characterized through in?situ injecting the pre-mixed healants into the cracked pure epoxy resin. The self?healing anhydride-cured epoxy using dual?component microcapsule system containing the selected healants was formulated, and the effects of the ratio and concentration of the dual?component microcapsules and the curing procedure of the host matrix on its healing performance was systematically. The results indicated that the selected healants exhibited good thermal stability, especially after microencapsulated and embedded into the host matrix. Owing to the good compatibility between the selected healants and resin matrix as confirmed by the manually injection healing, the self?healing showed good healing performance when epoxy cured with anhydride at middle and high temperatures through the microencapsulated epoxy?amine system. Healing efficiency of over 80 % could be achieved after the parametric optimization.

Key words: acid anhydride, epoxy resin, microcapsule, self?healing

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