کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
599846 1454293 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antimicrobial wool, polyester and a wool/polyester blend created by silver particles embedded in a silica matrix
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Antimicrobial wool, polyester and a wool/polyester blend created by silver particles embedded in a silica matrix
چکیده انگلیسی


• Antimicrobial wool, polyester and their blend are created by the Ag–silica coating.
• Fibre capacity for adsorbing Ag particles is enhanced by the silica matrix.
• Antimicrobial activity is strongly influenced by the fabric properties.
• Antimicrobial activity is directly related to the mode of the Ag–fibre binding.

A two-step antimicrobial finishing procedure was applied to wool (WO) and polyester (PES) fabrics and a WO/PES fabric blend, in which the pad-dry-cure method was performed to create a functional silica matrix through the application of an inorganic–organic hybrid sol–gel precursor (RB) followed by the in situ synthesis of AgCl particles on the RB-treated fibres using 0.10 and 0.50 mM AgNO3 and NaCl. The bulk concentration of Ag on the cotton fibres was determined by inductively coupled plasma mass spectroscopy. The antimicrobial activity was determined for the bacteria Escherichia coli and Staphylococcus aureus, and the fungus Aspergillus niger. The results showed that the highest concentration of the adsorbed Ag compound particles was on the WO samples followed by the WO/PES and PES samples. The antimicrobial activity of the finished fabric samples strongly depended not only on the amount of adsorbed Ag but also on the properties of the fabric samples. Whereas Ag biocidal activity was generated for the finished PES samples at Ag particle concentrations of less than 10 mg/kg, the 34-times higher Ag particle concentration on the WO samples was insufficient to impart satisfactory antimicrobial activity because Ag chemically binds to the thiol groups on wool. The presence of wool fibres in WO/PES samples decreased the antimicrobial protection of the fabric blend compared with that of the PES fabric. A lethal concentration of adsorbed Ag compound particles for bacteria and fungi was produced only through the treatment of the WO and WO/PES samples with 0.5 mM AgNO3.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 111, 1 November 2013, Pages 517–522
نویسندگان
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