Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 4, Pages 2597-2606Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am507639b
Keywords
cellulose; ZnO nanoparticles; nanocomposite film; one-step coagulation; antibacterial
Funding
- National Natural Science Foundation of China [51273151]
- Program for New Century Excellent Talents in University [NCET-11-0415]
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [12ZXFK03]
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Cellulose based ZnO nanocomposite (RCZ) films were prepared from cellulose carbamate-NaOH/ZnO solutions through one-step coagulation in Na2SO4 aqueous solutions. The structure and properties of RCZ films were characterized using XRD, FTIR, XPS, SEM, TEM, TG, tensile testing, and antibacterial activity tests. The content of ZnO in RCZ films was obtained in the range of 2.7-15.1 wt %. ZnO nanoparticles with a hexagonal wurtzite structure agglomerated into large particles, which firmly embedded in the cellulose matrix. RCZ films displayed good mechanical properties and high thermal stability. Moreover, the films exhibited excellent UV-blocking properties and antibacterial activities against Staphylococcus aureus and Escherichia coli. A dramatic reduction in viable bacteria was observed within 3 h of exposure, while all of the bacteria were killed within 6 h. This work provided a novel and simple pathway for the preparation of regenerated cellulose films with ZnO nanoparticles for application as functional biomaterials.
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