Issue 29, 2010
From the journal:

Journal of Materials Chemistry

A dual mechanism single-component self-healing strategy for polymers†

Ling Ming Meng,a   Yan Chao Yuan,a   Min Zhi Rong*b  and  Ming Qiu Zhang*b  

* Corresponding authors

a Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, DSAPM Lab, School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, P. R. China

b Materials Science Institute, Zhongshan University, Guangzhou, P. R. China
E-mail: cesrmz@mail.sysu.edu.cn, ceszmq@mail.sysu.edu.cn
Fax: +86-02084114008
Tel: +86-20-84114008

Abstract

A bifunctional single-component healant, glycidyl methacrylate (GMA), is encapsulated and employed for fabricating self-healing epoxy materials. The released GMA is able to rebond cracked portions at room temperature through hydrogen and covalent bonds, and hence recover fracture toughness with high efficiency. The main advances of the healing system lie in the following. (i) It simplifies the conventional approach using two-part healing agent and broadens applicability of the therapy since two healing mechanisms, solvent effect and chemical reactions, are involved. (ii) As GMA contains both epoxide groups and C[double bond, length as m-dash]C bonds, ring-opening and nucleophilic addition reactions between GMA and the residual amine in the matrix occur during crack healing and help to reconnect the separated faces. The application of nucleophilic addition, which has not yet been reported as a healing measure, might lead to expansion of the spectrum of self-healing agent because the species of organic molecules enabling nucleophilic addition reaction are far more than those with specific functional groups like epoxide.

Graphical abstract: A dual mechanism single-component self-healing strategy for polymers

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Article information

DOI
https://doi.org/10.1039/C0JM00268B
Article type
Paper
Submitted
03 Feb 2010
Accepted
27 Apr 2010
First published
16 Jun 2010

J. Mater. Chem., 2010,20, 6030-6038

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A dual mechanism single-component self-healing strategy for polymers

L. M. Meng, Y. C. Yuan, M. Z. Rong and M. Q. Zhang, J. Mater. Chem., 2010, 20, 6030 DOI: 10.1039/C0JM00268B

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