Mesoporous Silica Adsorbed on Cellulosic Textiles with Strong Antibacterial Properties against Foodborne Pathogens

Elnawawy, A. S. ; Khalil, M. S. ; Molins, E. ; Benito, M. ; Rodríguez-Jerez, J.J. and Guerrero, A. International Journal of Advanced Research in Science and Engineering vol. 06, iss. 11International Journal of Advanced Research in Science and Engineering vol. 06, iss. 11

Low density - highly porous tetraethoxysilane (TEOS) - based silica aerogels and cryogels were prepared in acidic water via a one-step process. The approximate values of the average pore diameter are 13 and 9 nm, and BET surface areas are 881 and 723 m 2 /g for aerogel and cryogel films, respectively. The silica films shrinkage related to drying was largely reduced because the sol-gel was adsorbed on gauze and non woven textiles. Supercritically dried films are compared with cryogels, also through optical properties, Scanning Electron Microscopy (SEM) and Attenuated Total Reflection -Fourier Transform Infrared Spectroscopy (ATR-FTIR). Based on ISO 22196:2007, the antibacterial activity of the untreated and antibacterials-treated cryogel silica films adsorbed on gauze textile were evaluated. Both films showed strong antibacterial properties against the food pathogens Escherichia coli, Salmonella typhimurium, and Listeria monocytogenes.

Bioactive materials for therapy and diagnosis

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