期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 139, 期 -, 页码 521-530出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.08.001
关键词
Chitosan; Thiolated modification; Rheological properties
资金
- National Natural Science Foundation of China [21571154]
- Natural Science Foundation of Jiangsu Province [BK20161315]
- Six Talent Peaks Project
- Jiangsu Fundament of Qilan Project
- 333 Project in Jiangsu Province
Chitosan-1-(mercaptomethyl)-cyclopropane acetic acid (CS-MCA) copolymer was synthesized by amino linkage. The obtained copolymer was characterized by FTIR, H-1 NMR, XRD, TGA and SEM. Porous and reticulate morphologies were found on the CS-MCA surface. The effects of pH on the rheological properties of CS-MCA were investigated. On the one hand, the apparent viscosity of CS-MCA indicated a shear-thinning behavior. The graft of MCA enhanced the moduli and the maximum elastic properties were observed at pH = 7.00. The addition of dithiothreitol reduced the viscosity and modulus of CS-MCA hydrogel, and the gelation time, temperature and frequency were obtained in dynamic oscillatory tests. The antibacterial effect of CS-MCA against E. coli was investigated for the inhibition zone and bacterial growth curve. These results showed that CS-MCA had better antibacterial ability than chitosan without modification. Therefore, the rheological behavior and functional activities can be applied for the hydrocolloid gels in food and pharmaceutical applications. (C) 2019 Elsevier B.V. All rights reserved.
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