载银阴离子纤维素纳米纤维复合材料具有高效的抗菌活性。
Silver coated anionic cellulose nanofiber composites for an efficient antimicrobial activity.
机构信息
Department of Applied Bioscience, College of Life & Environment Science, Konkuk University, Seoul, South Korea.
Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture, 386-8567, Japan.
出版信息
Carbohydr Polym. 2016 Sep 20;149:51-9. doi: 10.1016/j.carbpol.2016.04.084. Epub 2016 Apr 21.
Herein, we report a comparative study of silver coated anionic cellulose nanocomposite before (CMC-Ag) and after (AgNPs/CMC) chemical reduction for antibacterial activity. Cellulose nanofibers were prepared by deacetylation of electrospun cellulose acetate nanofibers, which were then treated with sodium chloroacetate to prepare anionic cellulose nanofibers (CMC). Aqueous AgNO3 solution with different concentrations was employed to produce nanofiber composites. To obtain AgNPs/CMC, the resultant Ag/CMC nanofibers were chemically reduced with NaBH4. The nanocomposites were characterized by FE-SEM, FTIR, XPS and SEM-EDS. Antimicrobiality tests were conducted using S. aureus and Escherichia coli bacteria following standard test method JIS L1902, 2008. The EDS results confirmed higher silver content in CMC-Ag nanofibers than AgNPs/CMC nanofibers. The antimicrobial test and EDS results demonstrated higher silver release (larger halo width) by the former in comparison to later which confers better antimicrobiality by CMC-Ag nanofibers.
在此，我们报告了银涂阴离子纤维素纳米复合材料（CMC-Ag）和化学还原后（AgNPs/CMC）的抗菌活性的比较研究。通过对电纺醋酸纤维素纳米纤维进行脱乙酰化制备纤维素纳米纤维，然后用氯乙酸钠处理制备阴离子纤维素纳米纤维（CMC）。使用不同浓度的AgNO3 水溶液制备纳米纤维复合材料。为了获得 AgNPs/CMC，用 NaBH4 将得到的 Ag/CMC 纳米纤维进行化学还原。通过 FE-SEM、FTIR、XPS 和 SEM-EDS 对纳米复合材料进行了表征。根据标准测试方法 JIS L1902，2008，使用金黄色葡萄球菌和大肠杆菌进行了抗菌性测试。EDS 结果证实 CMC-Ag 纳米纤维中的银含量高于 AgNPs/CMC 纳米纤维。抗菌试验和 EDS 结果表明，前者比后者释放更多的银（更大的晕宽），这使得 CMC-Ag 纳米纤维具有更好的抗菌性。
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