Construction of chitosan/ZnO nanocomposite film by in situ precipitation

In the present work, flexible chitosan/ZnO nanocomposite films were prepared by a green and facile method through in situ precipitation of nano-ZnO (nZnO) in the chitosan film. Zn(Ac)2 was added in chitosan solution to provide Zn2+, thus Zn2+ was fixed in the chitosan matrix and converted into nZnO...

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Bibliographic Details
Published in:International journal of biological macromolecules 2019-02, Vol.122, p.82-87
Main Authors: Qiu, Bo, Xu, Xiong-feng, Deng, Rong-hui, Xia, Gan-qing, Shang, Xi-fu, Zhou, Pang-hu
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Biomineralization
Chemical Precipitation
Chitosan
Chitosan - chemistry
Escherichia coli - drug effects
Mechanical Phenomena
Nanocomposites
Nanocomposites - chemistry
Staphylococcus aureus - drug effects
Temperature
Zinc Oxide - chemistry
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Summary:In the present work, flexible chitosan/ZnO nanocomposite films were prepared by a green and facile method through in situ precipitation of nano-ZnO (nZnO) in the chitosan film. Zn(Ac)2 was added in chitosan solution to provide Zn2+, thus Zn2+ was fixed in the chitosan matrix and converted into nZnO through interaction with NaOH with heating. The structure and properties of the hybrid films were characterized by Field emission scanning electron microscope (FESEM), atomic force microscope (AFM), Fourier transform infra-red (FT-IR), X-ray diffraction (XRD) and tensile testing. The results indicated that there was strong coordination interaction existed between Zn2+ and chitosan matrix for the good dispersion of nZnO in the chitosan film. Furthermore, nZnO distributed evenly in the chitosan and aggregated to form micro-nano-binary hierarchical structure, mimicking lotus leaf structure. Therefore, this work provides an effective way to prepare biocompatible and antibacterial chitosan/ZnO nanocomposite films, showing potential applications in the fields of antibacterial packaging and dressings.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2018.10.084