首页|Flame-retardant and antibacterial flexible polyurethane foams with high resilience based on a P/N/Si-containing system
Flame-retardant and antibacterial flexible polyurethane foams with high resilience based on a P/N/Si-containing system
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In this work,the coatings used phosphorylated chitosan(PCS)and GP-108 via the dip-coating method presented exceptional flame retardancy and antibacterial properties for flexible polyurethane foams(FPUF).PCS/GP@FPUF with 35％weight gain of PCS/GP can receive the UL-94 V-0 rating and obtain a 32％reduction of peak heat release rate value compared with that of FPUF,and it remains relatively dense char residues.The effective heat of combustion of PCS/GP@FPUF is 21.6 kJ/g,presenting a 22％decrease compared with that of FPUF.Meanwhile,the PCS/GP coatings mainly have the condensed-phase flame-retardant mechanism associated with the analysis of char residues and the volatile products released through the thermal degradation process.X-ray photoelectron spectroscopy results confirm that the char residues of PCS/GP@FPUF consist of highly-graphitized carbon and it formed P-N-Si synergistic char lay-ers.In addition,the antibacterial rates of PCS/GP@FPUF against Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)are 99.99％,and the incorporation of GP-108 does not influence the antibacterial proper-ties of PCS.Importantly,the resiliency of FPUFs has been slightly influenced.Briefly,the flame-retardant and antibacterial FPUFs with wonderful resiliency are hopeful to be applied as filler materials for vehicle seats and obtain longer service lives.
College of Textiles & Clothing,Institute of Functional Textiles and Advanced Materials,National Engineering Research Center for Advanced Fire-Safety Materials D & A(Shandong),Qingdao Key Laboratory of Flame Retardant Textile Materials,State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University,Qingdao 266071,China
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