磷/氮阻燃剂对涤纶/棉混纺织物的阻燃整理

Phosphorus/nitrogen-containing flame retardant for flame retardant finishing of polyester/cotton blended fabric

为赋予涤纶/棉混纺织物良好的阻燃性能,采用生物质植酸和尿素合成植酸铵盐,通过轧—烘—焙工艺对涤纶/棉混纺织物进行整理。借助傅里叶红外光谱仪对合成阻燃剂植酸铵盐进行表征,并研究了整理后涤纶/棉混纺织物的表面形貌、热稳定性、热释放性能、阻燃性能及其阻燃机制。结果表明:整理后涤纶/棉混纺织物的阻燃性能较好,极限氧指数升高至25.6%,在垂直燃烧测试中能够自熄,炭长降低为12 cm,满足GB/T 17591—2006《阻燃织物》中B_(1)级阻燃性能的要求;整理后涤纶/棉混纺织物的热稳定性提高,热释放能力降低;植酸铵盐主要通过膨胀型阻燃机制提高涤纶/棉混纺织物的阻燃性能。

The development of flame retardant polyester/cotton blended fabrics is of great interest.In this study,ammonium phytate salt was synthesized using biomass phytic acid and urea,and applied to improve the flame retardancy of polyester/cotton blended fabric through pad-dry-cure process.The ammonium phytate salt was characterized with the Attenuated total reflection Flourier transformed infrared spectra.The surface morphology,thermal stability,heat release capacity,flame retardancy and mechanism of the treated polyester/cotton blended fabric were explored.The results showed that the treated polyester/cotton blended fabrics had good flame retardancy.The LOI value of treated fabrics was increased to 25.6%.During the vertical burning test,the treated fabrics could self-extinguish and had the reduced char length of 12 cm,meeting the B_(1) classification according to GB/T 17591—2006"Flame retardant textiles".Besides,the treated fabrics showed higher thermal stability and lower heat release ability.Ammonium phytate salt improved the flame retardant properties of polyester/cotton blended fabrics through an intumescent flame retardant mechanism.