Phosphorus-nitrogen-silicon-based assembly multilayer coating for the preparation of flame retardant and antimicrobial cotton fabric
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A novel silicon- and nitrogen-containing compound, poly[3-(5,5-cyanuricacidpropyl)-siloxane-co-trimethyl ammoniumpropyl siloxane chloride] (PCQS) was synthesized and coated onto cotton fabrics with phytic acid (PA) by layer-by-layer assembly. The treated cotton fabrics were characterized by SEM, FT-IR and EDX. The thermal property, mechanical property, flame retardancy and antibacterial property of the coated cotton fabrics were investigated. The breaking strength of the coated cotton fabrics had a small decline. With the flame retardant effect of PCQS and PA, the coated cotton fabrics obtained excellent flame retardancy with LOI value of 29.8% and char length of 8.1 cm. Furthermore, the LOI value and char length of Cotton-PEI/(PCQS/PA)30-Cl separately reached 28.5% and 7.9 cm and Cotton-PEI/(PCQS/PA)30-Cl also showed high thermal stability with char yield of 34% at 600 °C, whereas pure cotton fabrics only obtained 8% char yield. The Cotton-PEI/(PCQS/PA)30-Cl exhibited effective antimicrobial activity against E. coli O157:H7 and S. aureus with 100% bacterial reduction at 106 CFU per square inch inoculated level within 1 min of contact time, respectively.
KeywordsPhosphorus-nitrogen-silicon-based coating Layer-by-layer assembly Flame retardant Antimicrobial
This work was supported by the Fundamental Research Funds for the Central Universities (JUSRP51722B), the Project of Jiangsu Science and Technological Innovation Team, national first-class discipline program of Light Industry Technology and Engineering (LITE2018-2), and 111 Projects (B17021).
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