期刊
CARBOHYDRATE POLYMERS
卷 115, 期 -, 页码 238-245出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.08.021
关键词
Chitosan; Carbon dots; Nanocomposite; Hydrogel; Mechanical properties; Thermal properties
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi [01(2488)/11/EMR-II]
- All India Council For Technical Education, New Delhi [8023/RID/RPS-3/(NER)2011-12]
- Science and Engineering Research Board (SERB), New Delhi [SR/S1/PC/0058/2010, SB/S1/PC-69/2012]
- IASST
- CSIR, New Delhi
In this work we report novel chitosan-carbon dots nanocomposite hydrogel films. A new green source tea was used as precursor for carbon dots (CDs). The electrostatic interaction of positive charge on chitosan and negative charge on CDs prepared from tea was used for the successful preparation of a stable and robust chitosan-carbon dots nanocomposite hydrogel film. The hydrogel films were characterized by UV-visible spectroscopy, X-ray diffraction (XRD), Fourier transformed infra-red spectroscopy (FTIR), scanning electron microscope (SEM), fluorescent microscopy, thermogravimetric analysis (TGA) and contact angle analysis. It was observed that chitosan-carbon dots hydrogel films are soft but tough with superior UV-visible blocking, swelling, thermal and mechanical properties in comparison to chitosan hydrogel film. Moreover chitosan-carbon dots films are more water repellent (hydrophobic) as indicated by their high contact angle values. Thus, fabrication of such green soft but tough biocompatible chitosan-carbon dots nanocomposite hydrogel films offers tremendous bio-medical and industrial applications. (C) 2014 Elsevier Ltd. All rights reserved.
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