Dual Physically Cross-Linked Nanocomposite Hydrogels Reinforced by Tunicate Cellulose Nanocrystals with High Toughness and Good Self-Recoverability

被引:126
作者
Zhang, Tiantian [1 ]
Zuo, Tao [2 ]
Hu, Danning [1 ]
Chang, Chunyu [1 ]
机构
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Hubei, Peoples R China
[2] Yangtze Valley Water Environm Monitoring Ctr, Wuhan 430072, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
high toughness; dual physically cross-linked hydrogel; electrostatic interaction; ionic coordination interaction; tunicate cellulose nanocrystals; POLY(VINYL ALCOHOL); MECHANICAL STRENGTH; WHISKERS; NETWORK; BEHAVIOR; FILMS; WATER; DYE;
D O I
10.1021/acsami.7b06219
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The weak mechanical properties of hydrogels usually limited their application in biomedical and industrial fields. Herein, we reported a nanocomposite network of poly(acrylic acid-co-acrylamide) (PAAAM) sequentially cross-linked by quaternized tunicate cellulose nanocrystals (Q-TCNCs) and Fe3+. Q-TCNCs acted as both interfacial compatible reinforcements and cross-linkers in the nanocomposite hydrogels to form loose cross-linking, whereas compact cross-linking was built by ionic coordination between Fe3+ and -COO- of PAAAM. The toughness of dual cross-linked hydrogel (D-Gel) was 340 times that of mono-cross-linked hydrogel (m-Gel), which was 10 times that of PAAAM hydrogel. Moreover, the nanocomposite hydrogels exhibited excellent self-recoverability after treating the stretched samples in FeCl3 aqueous solution. This work provided a universal strategy for construction of tough nanocomposite hydrogel reinforced with cellulose nanocrystals.
引用
收藏
页码:24230 / 24237
页数:8
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