期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 154, 期 -, 页码 173-181出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.03.117
关键词
Quat/di-N-halamines; Enhanced synergism; Cellulose
资金
- Natural Science Foundation of Shandong Province [ZR2014EMM005]
A silane unit with enhanced synergism that is realized using one cationic quaternary ammonium salt (QAS) to draw anionic bacteria to two N-halamine functionalities was designed and polymerized on cellulose for superior biocidability. Amonomer containing one tertiary amine, one amide N-H, and one imide N-H, was synthesized via alcoholysis of 3-triethoxysilylpropyl succinic anhydride with 2-(dimethylamino)ethan-1-ol and following esterification with 5-(4-hydroxyphenyl)hydantoin. The triethoxysilyl groups of the monomer were hydrolyzed to silanol groups to condense with counterparts in different hydrolyzates and with hydroxyl groups on cellulose to form a polymeric modifier. Each silane unit of the modifier has one QAS and two N-halamine functionalities (quat/di-N-halamines) after quaternization of the tertiary amine and chlorination of the amide and imide hydrogens. The resultant cellulose suppressed (7 logs) both Staphylococcus aureus and Escherichia coli within 3 min, demonstrating an enhanced synergism since the inactivation rate is faster than counterparts decorated with only N-halamine and with synergistic units of one cationic center and one N-halamine. The modifier exhibited promising stability and rechargeability toward washings, UV irradiation, and long-term storage. The proved enhanced synergismfromthe integration of one cationic center with multiple N-halamines directs the synthesis of more powerful biocides for developing antibacterial polymers. (C) 2020 Elsevier B.V. All rights reserved.
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