Efficient intrinsic self-healing epoxy acrylate formed from host-guest chemistry

被引：68

作者：

Hu, Zhen ^{[1
]}

Liu, Yingying ^{[1
]}

Xu, Xirong ^{[1
]}

Yuan, Weihao ^{[1
]}

Yang, Lei ^{[1
]}

Shao, Qian ^{[2
]}

Guo, Zhanhu ^{[4
]}

Ding, Tao ^{[3
]}

Huang, Yudong ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China

[2] Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Shandong, Peoples R China

[3] Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

[4] Univ Tennessee, Dept Chem & Biomol Engn, ICL, Knoxville, TN 37996 USA

来源：

POLYMER | 2019年 / 164卷

基金：

中国国家自然科学基金;

关键词：

mart materials; Matrix cracking; Host-guest chemistry; POLYMER NETWORKS; HYDROGELS; FUNCTIONALIZATION; CYCLOADDITION; COMPLEXATION; CYCLODEXTRIN; THERMOSET; COMPOSITE; GRAPHENE;

D O I：

10.1016/j.polymer.2019.01.010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

As epoxy resins have been widely applied in advanced composites, the self-healing performances are urgently needed to improve the service reliability and extend service time. In the present study, host-guest chemistry is directly introduced into the crosslinking structure of epoxy acrylate for the first time to endow the composite with self-healing behaviors. In order to implement the above strategy, a beta-CD/azobenzene inclusion complex (6-GMA-beta-CD/AAAB) containing double C=C bonds is designed and synthesized. By facile ultraviolet (UV) curing process, the epoxy acrylate is crosslinked by 6-GMA-beta-CD/AAAB complex via free radical copolymerization. Benefited from the advantage of the reversible dynamic host-guest interactions, the obtained epoxy films exhibit excellent self-healing and mechanical properties. In the present work, the tensile strength of a damaged sample (SHE-5) is restored to 63.3% (9.37 MPa) of the original values (14.80 MPa) under moderate heating stimulus. The present host-guest strategy offers a paradigm toward the practical applications of smart thermosetting composites in engineering.

引用

页码：79 / 85

页数：7

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