Micromechanical behavior of self-healing epoxy and hardener-loaded microcapsules by nanoindentation

被引：64

作者：

Lee, Jim ^{[1
,3
]}

Zhang, Mingqiu ^{[2
]}

Bhattacharyya, Debes ^{[1
]}

Yuan, Yan Chao ^{[2
]}

Jayaraman, Krishnan ^{[1
]}

Mai, Yiu Wing ^{[3
]}

机构：

[1] Univ Auckland, Ctr Adv Composite Mat, Dept Mech Engn, Auckland 1142, New Zealand

[2] Zhongshan Univ, Minist Educ, Key Lab Polymer Composite & Funct Mat, Inst Mat Sci, Guangzhou 510275, Guangdong, Peoples R China

[3] Univ Sydney, Ctr Adv Mat Technol, Sch Aerosp Mech & Mechatron Engn J07, Sydney, NSW 2006, Australia

来源：

MATERIALS LETTERS | 2012年 / 76卷

关键词：

Functional; Biomimetic; Polymers; Indentation; Elastic properties; DEPTH-SENSING INDENTATION; POLYMERIC MATERIALS;

D O I：

10.1016/j.matlet.2012.02.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoindentation is a widely used method for measuring the micromechanical properties of thin films and micro scale materials. Self-healing polymeric materials have the built-in capability to substantially recover their load transferring ability after damage. One of the main self-healing strategies incorporates microencapsulated healing agents within a polymer matrix to produce a polymer composite capable of self-healing. In this study, microcapsules containing, respectively, epoxy (resin) and mercaptan (hardener) were investigated with poly (melamine-formaldehyde) (PMF) as the shell material. The micromechanical behavior of microcapsules was tested using nanoindentation. The results show that the PMF shell material behaves as a viscoelastic plastic material. The modulus and hardness of the microcapsules were determined quantitatively. The size and loaded-component of microcapsules (i.e., hardener or resin) have a significant effect on the micromechanical properties of the microcapsules. (C) 2012 Elsevier BM. All rights reserved.

引用

页码：62 / 65

页数：4

共 17 条

[1] A method for interpreting the data from depth-sensing indentation instruments [J].