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    Sesbania Gum-Supported Hydrophilic Electrospun Fibers Containing Nanosilver with Superior Antibacterial Activity

    Year: 2019

    Journal: Nanomaterials, Volume 9, APR

    Authors: Lan, Shi; Lu, Yaning; Li, Chun; Zhao, Shuang; Liu, Naren; Sheng, Xianliang

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21607085]; Natural Science Foundation of the Inner Mongolia Autonomous Region [2016BS0515]; Program for Higher-Level Talent of Inner Mongolia Agricultural University [YJ2015-3]

    Keywords: sesbania gum; polyacrylonitrile; silver nanoparticles; hydrophilic; electrospinning; antibacterial activity

    In this contribution, we report for the first time on a new strategy for developing sesbania gum-supported hydrophilic fibers containing nanosilver using electrospinning (SG-Ag/PAN electrospun fibers), which gives the fibers superior antibacterial activity. Employing a series of advanced technologiesscanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, UV-visible absorption spectroscopy, X-ray photoelectron spectroscopy, and contact angle testingwe characterized the as-synthesized SG-Ag/PAN electrospun fibers in terms of morphology, size, surface state, chemical composition, and hydrophilicity. By adjusting the synthesis conditions, in particular the feed ratio of sesbania gum (SG) and polyacrylonitrile (PAN) to Ag nanoparticles (NPs), we regulated the morphology and size of the as-electrospun fibers. The fibers' antibacterial properties were examined using the colony-counting method with two model bacteria: Escherichia coli (a Gram-negative bacterium) and Staphylococcus aureus (a Gram-positive bacterium). Interestingly, compared to Ag/PAN and SG-PAN electrospun fibers, the final SG-Ag/PAN showed enhanced antibacterial activity towards both of the model bacteria due to the combination of antibacterial Ag NPs and hydrophilic SG, which enabled the fibers to have sufficient contact with the bacteria. We believe this strategy has great potential for applications in antibacterial-related fields.
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