海藻酸钙/环氧微胶囊在水泥基材料中的自修复作用

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

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Abstract 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.

Key words： cementitious materials microcapsules self-healing water absorbability

Published: 21 December 2018

CLC number:

TU528

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	Articles by authors
	MAO Qianjin
	WU Wenwen
	LIANG Peng
	WANG Ziming
	CUI Suping

Cite this article:

MAO Qianjin,WU Wenwen,LIANG Peng, et al. Self-healing Effect of Calcium Alginate/Epoxy Microcapsules in Cementitious Materials[J]. Materials Reports, 2018, 32(22): 4016-4021.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.22.031 OR http://www.mater-rep.com/EN/Y2018/V32/I22/4016

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