Enabling Antibacterial Coating via Bioinspired Mineralization of Nanostructured ZnO on Fabrics under Mild Conditions

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• 作者：Joydeb Manna ; Gousia Begum ; K. Pranay Kumar ; Sunil Misra ; Rohit K. Rana
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：May 22, 2013
• 年：2013
• 卷：5
• 期：10
• 页码：4457-4463
• 全文大小：390K
• 年卷期：v.5,no.10(May 22, 2013)
• ISSN：1944-8252

文摘

Herein, we present an environmentally benign method capable of mineralization and deposition of nanomaterials to introduce antibacterial functionalities into cotton fabrics under mild conditions. Similar to the way in which many naturally occurring biominerals evolve around the living organism under ambient conditions, this technique enables flexible substrates like the cotton fabric to be coated with inorganic-based functional materials. Specifically, our strategy involves the use of long-chain polyamines known to be responsible in certain biomineralization processes, to nucleate, organize, and deposit nanostructured ZnO on cotton bandage in an aqueous solution under mild conditions of room temperature and neutral pH. The ZnO-coated cotton bandages as characterized by SEM, confocal micro-Raman spectroscopy, XRD, UV-DRS, and fluorescence microscopy demonstrate the importance of polyamine in generating a stable and uniform coating of spindle-shaped ZnO particles on individual threads of the fabric. As the coating process requires only mild conditions, it avoids any adverse effect on the thermal and mechanical properties of the substrate. Furthermore, the ZnO particles on cotton fabric show efficient antibacterial activity against both gram-positive and gram-negetive bacteria. Therefore, the developed polyamine mediated bioinspired coating method provides not only a facile and 鈥済reen鈥?synthesis for coating on flexible substrate but also the fabrication of antibacterial enabled materials for healthcare applications.

Keywords:

bioinspired mineralization; coating; cotton; antibacterial; zinc oxide; green synthesis