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Materials 2018, 11(7), 1205; https://doi.org/10.3390/ma11071205

Preparation and Characterization of AgNPs In Situ Synthesis on Polyelectrolyte Membrane Coated Sericin/Agar Film for Antimicrobial Applications

1
State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
2
College of Biotechnology, Southwest University, Chongqing 400715, China
3
College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
4
Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China
5
College of Resources and Environment, Southwest University, Chongqing 400715, China
6
Department of Chemistry, College of Science and Arts and Promising Centre for Sensors and Electronics Devices (PCSED), Najran University, P.O. Box: 1988, Najran 11001, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Received: 5 June 2018 / Revised: 29 June 2018 / Accepted: 9 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue Advanced Functional Nanomaterials and Their Applications)
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Abstract

Antibacterial materials are of great importance in preventing bacterial adhesion and reproduction in daily life. Silver nanoparticle (AgNP) is a broad-spectrum antibacterial nanomaterial that has attracted significant attentions for its ability to endow natural materials with antibacterial ability. Silk sericin (SS) has a great advantage for biomaterial application, as it is a natural protein with excellent hydrophilicity and biodegradability. In this study, we prepared AgNPs and polyelectrolyte membrane (PEM) modified SS/Agar films through the layer-by-layer adsorption technique and ultraviolet-assisted AgNPs synthesis method. The film was well characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy. Other properties such as water contact angle, wettability and tensile strength, the release of silver were also studied. The antimicrobial activity of AgNPs-PEM-SS/Agar film was investigated against Escherichia coli and Staphylococcus aureus as the model microorganisms by the inhibition zone and bacterial growth curve assays. The results suggested that the AgNPs-PEM-SS/Agar film had excellent mechanical performance, high hydrophilicity, prominent water absorption ability, as well as outstanding and durable antibacterial activity. Therefore, the prepared novel AgNPs-PEM-SS/Agar composite film is proposed as a potentially favorable antibacterial biomaterial for biomedical applications. View Full-Text
Keywords: silver nanoparticle; sericin; agar; polyelectrolyte membrane; antimicrobial activity silver nanoparticle; sericin; agar; polyelectrolyte membrane; antimicrobial activity
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Liu, L.; Cai, R.; Wang, Y.; Tao, G.; Ai, L.; Wang, P.; Yang, M.; Zuo, H.; Zhao, P.; Shen, H.; Umar, A.; He, H. Preparation and Characterization of AgNPs In Situ Synthesis on Polyelectrolyte Membrane Coated Sericin/Agar Film for Antimicrobial Applications. Materials 2018, 11, 1205.

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