Preparation of Cellulose/Ag+ Antibacterial Composites Films by NMMO-Technology
By using hardwood pulp as natural cellulose resource, nano-TiO2/Ag+ and meso-SiO2/Ag+ as inorganic antibacterial agents, the cellulose/Ag+ antibacterial composites films were prepared to improve the elongation and antibacterial ability through NMMO-technology. The elongation at break of the cellulose composites films and the antibacterial ability on the Bacteria of S.aureus as a function of the content of the inorganic antibacterial agents were studied. The investigations suggest that the elongation at break of the cellulose composites films increases at first and then decreases, when the inorganic antibacterial agents’ concentration in the film increases. The elongation at break of the cellulose composites films reaches their maximums, which are improved to 69.8% and 64.1% for nano-TiO2/Ag+ and meso-SiO2/Ag+, respectively. With increasing concentration of the inorganic antibacterial agents, the antibacterial ability on the bacteria of S.aureus increases. It was also found that when the concentration of the inorganic antibacterial agents in the composites films was adjusted from 0.5 wt.% to 2.0 wt.%, the antibacterial abilities vary from 90.7% to 98.5% by incorporating nano-TiO2/Ag+ from 89.2% to 96.9% by incorporating meso-SiO2/Ag+, respectively.
OUYANG Yun, XU Min and YANG Li
Z. W. Jin et al., "Preparation of Cellulose/Ag+ Antibacterial Composites Films by NMMO-Technology", Advanced Materials Research, Vol. 174, pp. 458-461, 2011