Engineering of super bactericidal cotton using pyridinium/di-N-chloramine siloxane with intensified synergism

Tuning the ratio of complementary biocidal groups in a composite unit is proved to be tactic better minimize their weaknesses realize higher synergism. A silane with precursors one pyridinium and two N-chloramine sites, 6-(pyridin-4-yl)-3-(3-(trimethoxysilyl)propyl)-1,3,5-triazinane-2,4-dione, was synthesized, hydrolyzed dehydrocondensed into silicone modifier on cotton cellulose. Specially, isonicotinaldehyde ammonolyzed biuret produce 6-(pyridin-4-yl)-1,3,5-triazinane-2,4-dione that subsequently reacted (?-chloropropyl)trimethoxysilane synthesize through nucleophilic substitution. The quaternized chlorinated transform pyridine amide N–H structures each counterparts. cationic increases hydrophilicity draws anionic bacteria its adjacent highly fatal achieving faster contact-killing rate than not only monofunctionality but also basic synergistic integration center N-chloramine. This phenomenon therefore referred as “intensified synergism” provides crucial information for design more powerful biocides. pyridinium/di-N-chloramine coating exhibited extraordinary durability towards UV irradiation, washing cycles long-term storage due good resistance chemical inertness backbone.