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Antibacterial thermoplastic polyurethane electrospun fiber mats prepared by 3-aminopropyltriethoxysilane-assisted adsorption of Ag nanoparticles

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Abstract

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%.

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Authors and Affiliations

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

    Yu-man Liu, Qiang Li  (李强), Huan-huan Liu, Hui-hui Cheng, Jian Yu & Zhao-xia Guo  (郭朝霞)

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  1. Yu-man Liu
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  2. Qiang Li  (李强)
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  3. Huan-huan Liu
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  4. Hui-hui Cheng
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  5. Jian Yu
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  6. Zhao-xia Guo  (郭朝霞)
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Corresponding authors

Correspondence to Qiang Li  (李强) or Zhao-xia Guo  (郭朝霞).

Additional information

This work was financially supported by the National Natural Science Foundation of China (No. 51173093).

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Liu, Ym., Li, Q., Liu, Hh. et al. Antibacterial thermoplastic polyurethane electrospun fiber mats prepared by 3-aminopropyltriethoxysilane-assisted adsorption of Ag nanoparticles. Chin J Polym Sci 35, 713–720 (2017). https://doi.org/10.1007/s10118-017-1928-3

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  • DOI: https://doi.org/10.1007/s10118-017-1928-3

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