Antimicrobial cotton fibres prepared by in situ synthesis of AgCl into a silica matrix
- 819 Downloads
Functional antimicrobial cotton fibres were prepared in a novel two-step procedure utilising the pad-dry-cure method to apply an inorganic–organic hybrid sol–gel precursor (reactive binder, RB) followed by the in situ synthesis of AgCl particles on the RB-treated fibres. The morphology and surface composition of the modified cotton fibres were investigated by scanning electron microscopy imaging and X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy spectral analyses. The bulk concentration of Ag on the cotton fibres was determined by inductively coupled plasma mass spectroscopy, and the antimicrobial activity against the bacteria Escherichia coli and Staphylococcus aureus was estimated according to the ISO 20645:2004 (E) and AATCC 100-1999 methods. The results showed that this application process yields the following important benefits: (1) the presence of the RB silica matrix increased the fibres’ capacity for adsorbing AgCl particles compared with the same fibres without RB; (2) the in situ synthesis enabled a simple and environmentally friendly preparation of AgCl particles from AgNO3 and their embedment into the fibres; (3) the AgCl particles were bound to the RB silica matrix by physical forces, which allowed for their controlled release from the fibres; (4) the capacity of the RB-modified cotton samples to hold embedded AgCl particles was sufficient to provide a 100 % bacterial reduction even after 10 repeated washing cycles; and (5) the chemical modification of the cotton fibres did not significantly change their whiteness, wettability or softness.
KeywordsCellulose Antimicrobial Sol–gel matrix Silver chloride In situ synthesis Washing fastness
This work was supported by the Slovenian Research Agency (Programme P2-0213 and Basic Project J2-2223).
- Filipowska B, Rybicki E, Walawska A, Matyjas-Zgondek E (2011) New method for the antibacterial and antifungal modification of silver finished textiles. Fibr Text East Eur 19:124–128Google Scholar
- Gorjanc M, Mozetič M, Gorenšek M (2009) Low-pressure plasma for pretreatment of cotton fabric for better adhesion of nanosilver. Tekstilec 52:263–269Google Scholar
- Hunt RWG (1991) Measuring colour. Sec EDD. Ellis Horwood, New YorkGoogle Scholar
- Kissa E (1984) Repellent finishes. In: Lewin M, SB Sello (eds) Handbook of fiber science and technology: volume II, chemical processing of fibers and fabrics: functional finishes, part B. Marcel Dekker, New York, pp 142–210Google Scholar
- Tomšič B (2009) Influence of particle size of the silver on bactericidal activity of the cellulose fibres. Tekstilec 52:181–194Google Scholar
- Tomšič B, Simončič B, Cvijin D, Orel B, Zorko M, Simončič A (2008a) Elementary nano sized silver as antibacterial agent on cotton fabric. Tekstilec 51:199–215Google Scholar
- Tomšič B, Jerman I, Orel B, Simončič B (2011a) Efficiency of silver based antimicrobial finish on cellulose fibres: covalently versus physically bonded silver. In: 11th World textile conference AUTEX, 8–10 June 2011, Mulhouse, France. Book of proceedings: 150 years of research and innovation in textile science. Ecole Nationale Supérieure d’Ingénieurs Sud-Alsace, Mulhouse, pp 1062–1068Google Scholar
- Vilčnik A, Jerman I, Šurca Vuk A, Koželj M, Orel B, Tomšič B, Simončič B, Kovač J (2009) Structural properties and antibacterial effects of hydrophobic and olephobic sol–gel coatings for cotton fabric. Langmuir 25:5968–5980Google Scholar