Controllable in situ synthesis of silver nanoparticles on multilayered film-coated silk fibers for antibacterial application

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• 作者：Mei Meng^a ; ^b ; ^c ; Huawei He^a ; Jing Xiao^b ; ^c ; Ping Zhao^a ; Jiale Xie^b ; ^c ; Zhisong Lu^a ; ^b ; ^c ; ^{zslu@swu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Silk ; Silver nanoparticles ; Layer-by-layer assembly ; Antibacteria ; Surface functionalization
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 January 2016
• 年：2016
• 卷：461
• 期：Complete
• 页码：369-375
• 全文大小：1601 K

文摘

Layer-by-layer (LbL) assembly is a versatile technique for the preparation of multilayered polymeric films. However, fabrication of LbL polymetic film on silk for the in situ growth of high-density silver nanoparticles (AgNPs) has not been realized. Herein poly(acrylic acid) (PAA)/poly(dimethyldiallylammonium chloride) (PDDA) multilayers are constructed on silk via the LbL approach, subsequently serving as a 3-dimensional matrix for in situ synthesis of AgNPs. After 8 rounds of LbL assembly, the silk is fully covered with a layer of polymeric film. AgNPs with good crystalline structures could be in-situ generated in the silk-coated multilayers and their amount could be tailored by adjusting the bilayer numbers. The as-prepared silk could effectively kill the existing bacteria and inhibit the bacterial growth, demonstrating the antimicrobial activity. Moreover, the release of Ag⁺ from the modified silk can last for 120 h, rendering the modified silk sustainable antimicrobial activity. This work may provide a novel method to prepare AgNPs-functionalized antimicrobial silk for potential applications in textile industry.