期刊
CARBOHYDRATE POLYMERS
卷 80, 期 2, 页码 426-435出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2009.11.049
关键词
Cellulose; Silver; Antimicrobial; Finishing; Modification; Biodegradation; Soil burial test
资金
- Slovenian Research Agency [P2-0213]
- Slovenian Research Agency
The efficiency of different chemical forms of silver in protecting cellulose fibres against biodegradation was studied using a soil burial test. Cotton samples were finished using nanopowder of elemental silver with a particle size of 30 nm (Ag-1), dispersion of AgCl (Ag-2), and colloidal silver (Ag-3) of different concentrations. The degree of biodegradation was determined by SEM, colour measurements, tensile strength, degree of polymerization and FT-IR spectroscopy. The results showed that a strong agglomeration of Ag-1 led to its insufficient antimicrobial activity, since it was restricted only to Ag+ released from the surface of elemental silver by reduction. Despite the agglomeration, a concentration of Ag+ released by the dissociation of AgCl of the finish Ag-2 in the presence of moisture was high enough to provide excellent protection against fibre biodegradation. The high protective properties of Ag-3 were probably caused by the synergistic action of Ag nanoparticles and Ag+ cations. (c) 2009 Elsevier Ltd. All rights reserved.
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