期刊
CARBOHYDRATE POLYMERS
卷 98, 期 2, 页码 1573-1577出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.07.065
关键词
Cellulose nanocrystals; Silver nanoparticles; Polyvinyl alcohol; Nanocomposite
资金
- National Science and Technology Support Program [2012BAD32B05]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Novel polyvinyl alcohol (PVA) blend membranes containing cellulose nanocrystals (CNs) and silver nanoparticles (AgNPs) were prepared via a simple method. CNs were prepared by sulfuric acid treatment of microcrystalline cellulose. AgNO3 aqueous solution mixed with the CNs aqueous suspension and was reduced by NaBH4 at room temperature. Purified CNs/AgNPs nanocomposites as functional fillers mixed with polyvinyl alcohol to prepare blend membrane. The morphology, mechanical properties, and antibacterial activities of PVA/CNs/AgNPs composite films were investigated. The PVA/CNs/AgNPs composite films were stable and homogeneous. The tensile strength of PVA was increased from 57.02 MPa to 81.21 MPa when filled with CNs/AgNPs. Antibacterial ratio of PVA/CNs/AgNPs composite against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus was 96.9% and 88.2%, respectively. The CNs/AgNPs nanocomposites could be applied as bi-functional nanofillers within PVA to improve the mechanical properties and antibacterial activities. (C) 2013 Elsevier Ltd. All rights reserved.
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