期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 122, 期 -, 页码 294-300出版社
ELSEVIER
DOI: 10.1016/j.colsurfb.2014.07.003
关键词
Air-ozonolysis; Contact active surface; Quaternary ammonium salts; Antimicrobial surface; Polystyrene; Polyethylene
资金
- Director Strategic Program Fund [421-0281-14]
- United States-Israel Agricultural Research and Development Fund, BARD [US-4680-13C]
Air-ozonolysis was revealed as an accessible and effective approach for surface activation and further functionalization of hydrocarbon polymers. Antimicrobial contact active polyethylene (PE) and polystyrene (PS) were designed by generation on their surfaces OH-functional groups and covalent graft of dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride (C-18-TSA) quaternary ammonium salt. The shortened analog, trimethyl [3-(trimethoxysilyl) propyl] ammonium chloride (C-1-TSA), was also covalently attached to the activated PE and PS surfaces. X-ray photoelectron spectroscopy (XPS) and FTIR confirmed the surface modifications. Scanning electron (SEM) and confocal microscopy were utilized to monitor surface morphology and bacteria interactions. The antimicrobial effect of the C-18-TSA grafted polymer surfaces was demonstrated on Gram-negative and Gram-positive bacteria species including human pathogen, Salmonella enterica. The shorter C-1-TSA grafted polymers did not demonstrate bactericidal activity, suggesting the critical role of the alkyl chain length. The described strategy may establish a new general and safe platform for future development and application of contact active antimicrobial polymers. (C) 2014 Elsevier B.V. All rights reserved.
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