Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 461, Issue -, Pages 369-375Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.09.038
Keywords
Silk; Silver nanoparticles; Layer-by-layer assembly; Antibacteria; Surface functionalization
Categories
Funding
- State Key Laboratory of Silkworm Genome Biology
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies [cstc2011pt-sy90001]
- Southwest University [SWU111071]
- Specialized Research Fund for the Doctoral Program of Higher Education (RFDP) [20130182120025]
- Young Core Teacher Program of the Municipal Higher Educational Institution of Chongqing
- Fundamental Research Funds for the Central Universities [XDJK2015B016]
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Layer-by-layer (LbL) assembly is a versatile technique for the preparation of multilayered polymeric films. However, fabrication of LbL polymeric 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. (C) 2015 Elsevier Inc. All rights reserved.
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