Journal
CARBOHYDRATE POLYMERS
Volume 226, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115311
Keywords
Gallnut tannins; Chitosan; Solution spinning; Composite fiber; Functionalization; Ionic cross-linking
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Funding
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX19_0784]
- Fundamental Research Funds for the Central Universities [JUSRP51723B, JUSRP51907A]
- Natural Science Foundation of Jiangsu Province [BK20180624]
- 111 projects [B17021]
- USDA-National Institute of Food and Agriculture (Hatch Act, Multistate Research Project) [S-1054, NEB 37-037]
- Agricultural Research Division at the University of Nebraska-Lincoln, USA
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Natural extracts gallnut tannins (GTs) were used as functional components to prepare chitosan/gallnut tannins (CS/GTs) composite fiber by blended solution spinning. Chitosan fiber has great potential to be used as absorbent suture and dressing due to its good biocompatibility. However, the weak mechanical properties limited its application. Chitosan and GTs were blended in aqueous solution of acetic acid to spin the composite fiber. The results indicated that CS/GTs fiber can be easily prepared due to the appropriate rheology characteristics for blended solution. Compared with pure chitosan fiber, CS/GTs fiber with 10% GTs showed lower hydrophilicity and higher dry, wet breaking strength by more than 40% due to ionic cross-linking between chitosan and GTs. The bacterial reduction to Staphylococcus aureus increased from 49.0 to 99.7% and about double green and red fluorescent intensity were observed for CS/GTs fiber. GTs have great potentiality in improving the properties of chitosan fiber.
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