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静电层层自组装法整理多巴胺改性涤/棉混纺织物的阻燃性能
引用本文:陈威,关晋平,陈国强,匡小慧.静电层层自组装法整理多巴胺改性涤/棉混纺织物的阻燃性能[J].纺织学报,2017,38(9).
作者姓名:陈威  关晋平  陈国强  匡小慧
作者单位:苏州大学 纺织与服装工程学院,江苏 苏州,215006
基金项目:苏州市科技支撑计划项目,江苏高校优势学科建设二期项目(苏学科办
摘    要:为了赋予涤/棉混纺织物良好的阻燃性能,以pH值为5、质量分数为1%壳聚糖溶液和pH值为2、质量分数为1.5%植酸钠溶液,通过静电层层自组装法,对经多巴胺改性后的涤/棉(65/35)混纺织物进行阻燃整理.其中正负离子交替沉积1次记为组装1层,第1层内每次组装15 min,第1层后各次组装时间为5 min,共组装15层.探讨了整理后织物极限氧指数(LOI)、炭长、热重、热释放速率、炭渣形貌等性能.结果表明:多巴胺改性可以提高涤/棉混纺织物的反应性,有利于阻燃整理;整理后织物阻燃性能显著提高,LOI值从未整理时的18.8%提高到28.7%;热分解温度比未整理织物大幅提前,炭渣含量较未整理提高了5.7%;整理后织物点燃时间延长,平均热释放速率(HRR)和峰值热释放速率(PHRR)分别为14.16 kW/m2和51.07 kW/m2,相较未整理涤/棉织物下降了84.62%和78.47%,织物燃烧危险性显著降低.

关 键 词:涤/棉混纺织物  阻燃性能  多巴胺  改性  静电层层自组装法  壳聚糖

Flame retardant properties of dopamine modified polyester/cotton blended fabric treated by electrostatic layer-by-layer self-assembly
CHEN Wei,GUAN Jinping,CHEN Guoqiang,KUANG Xiaohui.Flame retardant properties of dopamine modified polyester/cotton blended fabric treated by electrostatic layer-by-layer self-assembly[J].Journal of Textile Research,2017,38(9).
Authors:CHEN Wei  GUAN Jinping  CHEN Guoqiang  KUANG Xiaohui
Abstract:In order to impart excellent flame retardant property, 1% chitosan solution with pH value of 5 and 1 . 5% sodium phytate solution with pH value of 2 were alternatively deposited on dopamine modified polyester/cotton 65/35 fabric by electrostatic layer-by-layer self-assembly method. The deposited time for the first bilayer was 15 min, after that, it was 5 min. In this treatment, 15 bilayers were deposited. Limiting oxygen index ( LOI ) , char length, thermal gravimetric analysis, heat release rate and morphology of char residue were discussed. The results show that dopamine modification can increase the reactivicy of flame retardant components. The treated polyester/cotton fabric significantly improved its flame retardancy compared with control fabrics. LOI of the treated polyester/cotton fabric is 28. 7% while 18. 8% of control fabrics. The modified polyester/cotton 65/35 fabric decomposed earlier and char residue increased by 5. 7% compared with control fabrics. Average heat release rate ( HRR) and peak HRR(PHRR) are 14. 16 kW/m2and 51. 07 kW/m2, decrease by 84. 62% and 78. 47%,respectively, compared with control fabric. Flame retardant treatment can reduce the fire hazard during combustion.
Keywords:polyester/cotton blended fabric  flame retardant property  dopamine  modification  electrostatic layer-by-layer self-assembly  chitosan
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