Silver/chitosan/cellulose fibers foam composites: From synthesis to antibacterial properties

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:393

Article

Guibal, Eric¹  Cambe, Simon¹  Bayle, Sandrine²  Taulemesse, Jean-Marie³  Vincent, Thierry¹ 

[1] Ecole Mines, Lab Genie Environm Ind, Equipe Interfaces Fonctionnalisees Environm Secur, F-30319 Ales, France

[2] Ecole Mines, Lab Genie Environm Ind, Equipe Metrol Biodiagnost, F-30319 Ales, France

[3] Ecole Mines, Ctr Mat Grande Diffus, F-30319 Ales, France

关键词: Silver;    Chitosan;    Cellulose fibers;    Antibacterial;    Sorption;    Foams;    Membranes;    Antibiogram-test;    Dynamic antibacterial test;   

DOI  :  10.1016/j.jcis.2012.10.057

来源: Elsevier

【 摘 要 】

Chitosan, associated with cellulose fibers, can be used for elaborating sponge-like structures (membranes, foams) for the binding of silver ions. The composite material has very promising antibacterial properties versus Pseudomonas aeruginosa (Gram(-)) >> Escherichia coli (Gram(-)) > Staphylococcus hominis (Gram(+)) >> Staphylococcus aureus (Gram(+)). The amount of silver required for bactericidal effect is quite low (below 0.1 mg per disk, this means less than 6 mg Ag g(-1)) in antibiogram-type test but also for the treatment of water suspensions (in dynamic mode with water recycling). The presence of cellulose fibers improves the efficiency of metal binding, due to chitosan dispersion and enhancement of the availability and accessibility of amine groups. Silver nanoparticles (about 100 nm) were observed by scanning electron microscopy. The photo-reduction (exposure to sun light or UV lamp) leaded to the partial aggregation of silver nanoparticles: metal ions that were released tended to aggregate at the surface of the material. (C) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

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