Self-healing Effect of Calcium Alginate/Epoxy Microcapsules in Cementitious Materials

被引：0

作者：

Mao Q. ^{[1
]}

Wu W. ^{[1
]}

Liang P. ^{[1
]}

Wang Z. ^{[1
]}

Cui S. ^{[1
]}

机构：

[1] College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing

来源：

Cailiao Daobao/Materials Review | 2018年 / 32卷 / 11期

关键词：

Cementitious materials; Microcapsules; Self-healing; Water absorbability;

D O I：

10.11896/j.issn.1005-023X.2018.22.031

中图分类号：

学科分类号：

摘要：

Calcium alginate microcapsules loaded with epoxy were successfully prepared by a piercing-solidifying method, and applied to self-healing cementitious materials. The structure, mechanical strength and water swelling properties of the microcapsules were characterized, and the healing mechanism of microcapsules was monitored by X-ray computed tomography and SEM/EDS. The results showed that the microcapsules were three-dimensional network structures; the strength of the microcapsule with particle size of 0.7-2 mm was independent of the particle size; and the content of calcium alginate in microcapsule determined the strength, water absorption and swelling ratio of the microcapsule. The healing mechanism of calcium alginate/epoxy microcapsules in cement matrix was observed that when cracks formed, the microcapsules were broken to release the epoxy resin, bonding the cracks; when water penetrated into the cracks, the microcapsules absorbed and swelled, blocking the cracks and even promoted the cement particles continue to hydration, healing cracks. © 2018, Materials Review Magazine. All right reserved.

引用

页码：4016 / 4021

页数：5

共 20 条

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