New bioactive polymer filtering material composed of nonwoven polypropylene
containing alkylammonium microbiocides on a perlite carrier (in English)
Polimery 2010, No 7/8, 568
This article presents a new bioactive polymer filtering material obtained by the pneumothermal method from polypropylene with an active substance, alkylammonium microbiocide, as an active substance on a perlite carrier. Material with only 8% of this bioperlite (0.37% biocide) showed high antimicrobial activity against gram-positive and gram-negative bacteria: E.coli, P.aeruginosa, K.pneumoniae (99.9% reduction), S.aureus, M.flavus (95%) and fungi: A.niger (98%) and C.albicans (94%) after 6 hours of incubation. Bacteria B.subtilis were less evidently sensitive to the biocidal activity of the bioactive nonwoven fabric (86% reduction), but material with 10% bioperlite showed 100% reduction of microorganisms. The application of bioperlite caused an increase in the hydrophilic character of the polymer material. It was found that an increase in the humidity of the bioactive nonwoven caused an increase in the antimicrobial properties of the material. In a test of model filtering systems that included the new bioactive nonwoven fabric with bioperlite, its high antimicrobial activity and efficient aerosol filtration for both solid and liquid particles (NaCl and paraffin oil mist) and also microorganisms (E.coli, S.aureus) were established. The presented filtering system with a bioactive nonwoven fabric including alkylammonium microbiocides on a perlite carrier may be applied in the production of filtering half-masks and filters in workplaces where microbiological risk occurs.
Key words: bioactive polypropylene, filtering nonwovens, antimicrobial properties, alkylammonium microbiocides, perlite, half-masks
New bioactive polymer filtering material composed of nonwoven polypropylene containing alkylammonium microbiocides on a perlite carrier (in English)