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Preparation of polyacrylonitrile-based fibres with chelated Ag ions for antibacterial applications.
Royal Society Open Science ( IF 3.5 ) Pub Date : 2020-07-08 , DOI: 10.1098/rsos.200324
Li Chang 1 , Wenjie Duan 2, 3 , Anguo Chen 1 , Jianjun Li 1 , Siqi Huang 1 , Huijuan Tang 1 , Gen Pan 1 , Yong Deng 1 , Lining Zhao 1 , Defang Li 1 , Liang Zhao 2
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The need for an excellent antibacterial material that is sufficiently powerful to never develop bacterial resistance is urgent. In this study, a series of novel polyacrylonitrile-based fibres with chelated Ag ions (referred to as Ag-SH-PANF) were prepared by a two-step chemical modification process: grafting and chelating. The properties of the as-prepared Ag-SH-PANF were characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The antibacterial activities of Ag-SH-PANF were examined against pathogenic bacteria, and an antibacterial mechanism was explicated based on the release of Ag ions from the fibres' surfaces. The results showed that, although chelation occurred between the Ag ions and the grafted amino, sulfhydryl and disulfide groups, Ag-SH-PANF retained its fine microstructure and thermal stability. Moreover, Ag-SH-PANF displayed excellent antibacterial ability against pathogenic bacteria as well as good washing durability. In terms of the antibacterial mechanism, Ag ions are the main bactericidal agents in the role of catalysts and are not consumed in the antibacterial process. Nonetheless, a relatively higher concentration of Ag ions can accelerate the bactericidal process.



中文翻译:

制备具有螯合Ag离子的聚丙烯腈基纤维,用于抗菌应用。

迫切需要一种出色的抗菌材料,该材料必须具有强大的功能,以至于永远不会产生细菌耐药性。在这项研究中,通过两步化学修饰工艺:接枝和螯合,制备了一系列具有螯合的银离子的新型聚丙烯腈基纤维(称为Ag-SH-PANF)。通过傅立叶变换红外(FT-IR)光谱,热重分析(TGA),X射线衍射(XRD),扫描电子显微镜(SEM)和X射线光电子来表征制备的Ag-SH-PANF的性质光谱(XPS)。研究了Ag-SH-PANF对病原菌的抗菌活性,并基于从纤维表面释放出的Ag离子阐明了抗菌机理。结果表明,尽管Ag离子与接枝的氨基,巯基和二硫键之间发生螯合,但Ag-SH-PANF保留了其优良的微观结构和热稳定性。而且,Ag-SH-PANF显示出对病原菌的优异的抗菌能力以及良好的洗涤耐久性。就抗菌机理而言,Ag离子是催化剂的主要杀菌剂,在抗菌过程中不会被消耗。尽管如此,相对较高浓度的银离子可以加速杀菌过程。Ag离子是催化剂作用下的主要杀菌剂,在抗菌过程中不会被消耗。尽管如此,相对较高浓度的银离子可以加速杀菌过程。Ag离子是催化剂作用下的主要杀菌剂,在抗菌过程中不会被消耗。尽管如此,相对较高浓度的银离子可以加速杀菌过程。

更新日期:2020-07-20
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