期刊
CARBOHYDRATE POLYMERS
卷 171, 期 -, 页码 77-84出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.04.035
关键词
TEMPO-oxidized cellulose nanofibers (TOCNs); Gelatin; Hydrogels; Mechanical properties; Shape memory
资金
- Science and Technology Project of Guangzhou City in China [2016070220045]
- State Key Laboratory of Pulp and Paper Engineering [2016 c01, 2015TS01]
- Natural Science Foundation of China [201404042]
- Shandong Natural Science Foundation [ZR2015PC016]
- Science and Technology Planning Project of Higher Education of Shandong Province [J14LD51]
- Doctoral Starting up Foundation of Qufu Normal University [BSQD2012058]
- Science and Technology Planning Project of Qufu Normal University [xkj201413]
TEMPO-oxidized cellulose nanofibers/polyacrylamide/gelatin shape memory hydrogels were successfully fabricated through a facile in-situ free-radical polymerization method, and double network was formed by chemically cross-linked polyacrylamide (PAM) network and physically cross-linked gelatin network. TEMPO-oxidized cellulose nanofibers (TOCNs) were introduced to improve the mechanical properties of the hydrogel. The structure, shape memory behaviors and mechanical properties of the resulting composite gels with varied gel compositions were investigated. The results obtained from those different studies revealed that TOCNs, gelatin, and PAM could mix with each other homogeneously. Due to the thermoreversible nature of the gelatin network, the composite hydrogels exhibited attractive thermo-induced shape memory properties. In addition, good mechanical properties (strength >200kPa, strain >650%) were achieved. Such composite hydrogels with good shape memory behavior and enhanced mechanical strength would be an attractive candidate for a wide variety of applications. (C) 2017 Elsevier Ltd. All rights reserved.
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