Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 9, Pages 3885-3892Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b05369
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Funding
- Natural Science Foundation of Jiangsu Province [BK20160988]
- National Natural Science Foundation of China [21736006, 21474052]
- Fund of State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201704, ZK201716]
- National Key Research and Development Program of China [2016YFB0401700]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Hydrogels that are capable of autonomous healing upon damage have attracted wide attention in recent years. The design and fabrication of hydrogels possessing both excellent self-healing and high strength is highly desired. Herein, we report the facile synthesis of self-healing poly(MAH-beta-CD-co-AA) hydrogels (MAH-beta-CD = beta-cyclodextrin grafted vinyl carboxylic acid groups; AA = acroleic acid) via frontal polymerization (FP) for the first time. When ignited by a soldering iron, frontal polymerization occurred to fabricate poly(MAH-beta-CD-co-AA) hydrogels within 10 min. The as-fabricated hydrogels exhibited pH sensitivity and high mechanical strength and could repair themselves autonomously without any external stimuli. In addition, we reinforced poly(MAH-beta-CD-co-AA) hydrogel through further cross-linking with N-isopropylacrylamide to form a double network (DN) hydrogel. Benefiting from the excellent self-healing property, a Janus bilayer hydrogel toward temperature-triggered actuator was achieved by simply sticking poly(MAH-beta-CD-co-AA) and DN hydrogel together. This hydrogel actuator was very sensitive to thermal stimulus, which showed a rapid response in several seconds. This work might promote the development of diverse functional self-healing hydrogels via a facile and flexible pathway.
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