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Muro del Alcoy, Spain

Beddow J.,Coventry University | Singh G.,Coventry University | Blanes M.,Textile Research Institute | Molla K.,Textile Research Institute | And 4 more authors.
AIP Conference Proceedings | Year: 2012

The high incidence of hospital-acquired infections places a huge financial burden on our healthcare systems. These infections are also responsible for many millions of deaths each year. Antibacterial fabrics for use in medical textiles, such as hospital uniforms, bedding and wound dressings, can provide a useful weapon in the on-going fight against these infections. The aim of this EU funded Framework 7 project is to develop a pilot line sonochemical coating machine for the production of antibacterial fabrics. The sonochemical coating technology under development is based on a lab scale process that was developed at Bar-Ilan University (BIU). It involves two processes that are driven by acoustic cavitation; the in situ generation of the metal oxide (MO) nanoparticles and the simultaneous high velocity propulsion of these nanoparticles onto a fabric leading to impregnation. Here we report on a comparison of 2 different MO nanoparticle coatings, ZnO and CuO, that were sonochemically applied on to a plain cotton fabric. Both of these coatings were prepared by BIU. In this work, the antibacterial efficacy of the coated fabrics was quantitatively assessed using the absorption method from BS EN ISO 20743:2007. Both types of metal oxide nanoparticle displayed antibacterial activity against all of the test bacteria with particularly high levels of bacterial reduction observed with the CuO coating. The results presented here are from an EU Framework 7 funded project (SONO, EU Project Number: 228730). The project is a collaboration between 17 partner organizations from 10 different European countries. Further details can be found on the project website at: www.fp7-sono.eu. © 2012 American Institute of Physics.

Perelshtein I.,Bar - Ilan University | Ruderman E.,Bar - Ilan University | Perkas N.,Bar - Ilan University | Tzanov T.,Polytechnic University of Catalonia | And 8 more authors.
Journal of Materials Chemistry B | Year: 2013

Nanostructured chitosan (CS) and a chitosan-Zn based (Zn-CS) complex have been synthesized and simultaneously deposited on cotton fabrics using ultrasound. SEM measurements revealed that the coating consists of nanoparticles (NPs) of ca. 40 nm in diameter, homogeneously dispersed along the yarns. XANES studies pointed out that the complex consisted of a less than 2.1 nm ZnO core to which the chitosan was bonded. Additionally, FTIR measurements indicated the in situ formation of a Zn-CS complex which is the only deposited material on the cotton surface. The antibacterial properties of the CS and Zn-CS coated textiles were tested against Gram positive and Gram negative bacteria species. More than two-fold increase of the antibacterial activity of Zn-CS NP coated textiles was detected as compared to the fabrics treated with the sonochemically synthesized CS NPs alone. The sonochemical technique appears to be a suitable method for producing organic NPs of soluble compounds, without loss of their intrinsic properties, i.e. the antimicrobial activity of chitosan. Moreover, hybrid nanoorganometallic particles were simultaneously synthesized and deposited on cotton sonochemically. This journal is © The Royal Society of Chemistry 2013.

Perelshtein I.,Bar - Ilan University | Ruderman Y.,Bar - Ilan University | Perkas N.,Bar - Ilan University | Beddow J.,Coventry University | And 7 more authors.
Cellulose | Year: 2013

Hospital-acquired nosocomial infections are a major health, and consequently financial issue, in the world healthcare system. The problem of bacterial infections in general, and in hospitals in particular, has led to extensive scientific and industrial efforts to fabricate antibacterial textiles. A sonochemical coating machine was developed and built and its ability to coat antibacterial nanoparticles (NPs) onto 40-50 meter length of materials on a roll to roll basis at a speed of 22 cm/min. Cotton coated sonochemically with copper oxide nanoparticles (CuO NPs) was found to maintain its antibacterial properties even after 65 cycles of washings according to hospital protocols of hygienic washing (75 °C). This demonstrates the good quality and high stability of this sonochemically produced NPs coating on textiles. Durable antibacterial textiles such as these may be suitable for wide spread use in future hospital environments where hygiene control is of paramount importance. © 2013 Springer Science+Business Media Dordrecht.

Perelshtein I.,Bar - Ilan University | Ruderman Y.,Bar - Ilan University | Perkas N.,Bar - Ilan University | Traeger K.,Polytechnic University of Catalonia | And 7 more authors.
Journal of Materials Chemistry | Year: 2012

Zinc oxide nanoparticles (ZnO NP's) are known for their excellent antibacterial properties. This paper describes a method for enhancing the stability and the antibacterial activity of ZnO NPs synthesized and embedded sonochemically on cotton fabrics, by pre-treating the fabric surface with cellulase enzyme. The enzymatic pre-treatment resulted in the deposition of smaller sized NPs with improved adhesion. The reduction in particle size brought about better antibacterial performance against several types of bacteria. The sonochemically produced ZnO coating withstood 10 laundry cycles at 92 °C retaining its antibacterial activity. © The Royal Society of Chemistry 2012.

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