Preparation of composite membranes with high tensile strength and antibacterial properties based on Ag-nanoparticles deposition on bacterial cellulose/apocynum venetum

IF 5.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Siqi Zhu , Fan Hong , Huanda Zheng , Jie Chen , Yue Huang , Laijiu Zheng
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引用次数: 0

Abstract

Bacterial cellulose (BC), a natural nanofiber synthesized by bacteria, possesses a distinctive three-dimensional structure. Moreover, it exhibits superior properties like high water-holding capacity, high biocompatibility, non-toxicity, and biodegradability, conferring it with tremendous application potential in wound healing. Nevertheless, the lack of antibacterial property of BC restricts the use of pure BC membrane in the biomedical field. In this study, using BC as the substrate, it was compounded with Apocynum venetum (Av) to fabricate Bacterial cellulose-Apocynum venetum membrane (BC-Av). Subsequently, a nanosilver solution was prepared by reducing the AgNO3 solution with ethylene glycol, and Ag was uniformly deposited on the surface of the BC-Av membrane via supercritical carbon dioxide (Sc-CO2) fluid. The outcomes revealed that the Ag-loaded BC-Av membrane (BC-Av-Ag) exhibited excellent antibacterial efficacy against S. aureus and E. coli, reaching 99.8% and 99.5% respectively, along with superior mechanical properties such as higher tensile strength (1.65 ± 0.03 MPa), Young's modulus (6.5 ± 0.25 MPa), and fracture strain (32.5 ± 1.5%). Additionally, it was verified that this green composite material not only possesses high thermal stability but also enhances the hydrophilicity of BC. The combination of the biodegradability and biocompatibility of BC-Av and BC-Av-Ag membrane lays a foundation for their future application in medical protective materials.

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来源期刊
Surfaces and Interfaces
Surfaces and Interfaces Chemistry-General Chemistry
CiteScore
8.50
自引率
6.50%
发文量
753
审稿时长
35 days
期刊介绍: The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)
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