Citation: Yu-man Liu, Qiang Li, Huan-huan Liu, Hui-hui Cheng, Jian Yu, Zhao-xia Guo. Antibacterial Thermoplastic Polyurethane Electrospun Fiber Mats Prepared by 3-Aminopropyltriethoxysilane-assisted Adsorption of Ag Nanoparticles[J]. Chinese Journal of Polymer Science, ;2017, 35(6): 713-720. doi: 10.1007/s10118-017-1928-3 shu

Antibacterial Thermoplastic Polyurethane Electrospun Fiber Mats Prepared by 3-Aminopropyltriethoxysilane-assisted Adsorption of Ag Nanoparticles

Key Laboratory of Advanced Materials (Ministry of Education), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: Qiang Li, liqiang@mail.tsinghua.edu.cn Zhao-xia Guo, guozx@mail.tsinghua.edu.cn
Received Date: 15 September 2016
Revised Date: 9 December 2016
Accepted Date: 15 December 2016

Fund Project: financially supported by the National Natural Science Foundation of China 51173093

Antibacterial thermoplastic polyurethane (TPU) electrospun fiber mats were prepared by adsorption of Ag nanoparticles (Ag NPs) onto TPU/3-aminopropyltriethoxysilane (APS) co-electrospun fiber mats from silver sol. The use of APS can functionalize TPU fibers with amino groups, facilitating the adsorption of Ag NPs. The effects of pH of silver sol and APS content on Ag NP adsorption and antibacterial activity were investigated. Ag NP adsorption was evidenced by TEM, XPS and TGA. Significant Ag NP adsorption occurred at pH = 3-5. The main driving force for Ag NP adsorption is electrostatic interaction between --NH₃⁺ of the fibers and --COO^- derived from the -COOH group capped on the surfaces of Ag NPs. The antibacterial activity of the Ag NP-decorated TPU/APS fiber mats was investigated using both gram-negative Escherichia coli and gram-positive Bacillus subtilis. The antibacterial rate increases with increasing APS content up to 5% where the antibacterial rates against both types of bacteria are over 99.9%.
- PU,
- Electrospinning,
- Coupling agent,
- Immobilization,
- Bacteria
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