苎麻织物紫外光接枝阻燃改性研究

纺织学报 ›› 2014, Vol. 35 ›› Issue (4): 79-0.

苎麻织物紫外光接枝阻燃改性研究

陈志军¹ 刘兴乔² 柳浩¹ 罗云英¹ 黄年华¹

1. 武汉纺织大学纺织科学与工程学院
2. 武汉纺织大学图书馆

收稿日期:2012-12-20 修回日期:2013-12-10 出版日期:2014-04-15 发布日期:2014-04-14
基金资助:
湖北省自然科学基金资助项目

Study on flame retardant modification of ramie fabrics by ultraviolet grafting

Received:2012-12-20 Revised:2013-12-10 Online:2014-04-15 Published:2014-04-14

摘要/Abstract

摘要： 以甲基丙烯酸缩水甘油酯(GMA)为接枝单体，用紫外光(UV)接枝的方法将GMA接枝到苎麻织物(Pure Ramie)上，接枝后的织物(Ramie-g-GMA)用乙二胺(ED)胺化(Ramie-g-GMA/ED)，再用磷酸(OP)磷酸化(Ramie-g-GMA/ED/OP)，制得阻燃改性的苎麻。通过热重分析(TGA)、傅立叶红外光谱(FTIR)、扫描电子显微镜(SEM) 和极限氧指数(LOI)等技术和手段研究了阻燃改性前后的苎麻的热降解行为、阻燃性能和结构形貌，并考察了光照时间、引发剂二苯甲酮(BP)浓度、GMA浓度等因素对GMA接枝率的影响。扫描电镜分析和红外光谱研究结果表明GMA接枝到苎麻织物上；GMA接枝率随着光照时间、引发剂浓度和单体浓度的增加而增大；接枝反应20 min、BP浓度为0.3 mol/L、GMA浓度为30 %(v/v)时，GMA接枝率达到35.61 %，织物仍保持很好的手感；磷酸化后的织物在燃烧过程中因磷的催化成炭作用，显著地提高了苎麻织物的阻燃性能；GMA接枝率为50.65%的苎麻织物胺化、磷酸化后LOI可达38.6%。

关键词: 苎麻, 紫外光接枝, 阻燃, 甲基丙烯酸缩水甘油酯, 胺化, 磷酸化

Abstract: Flame retardant ramie fabrics were prepared by grafting glycidyl methacrylate (GMA) via ultraviolet (UV). Epoxy group present in GMA grafted ramie fabric (GMA-g-Ramie) was reacted with ethidene diamine (ED) and subsequently modified with orthophosphoric acid (OP) solution. Thermal degradation behaviour, flame retardant property, structure and morphology of pristine and modified ramie fabrics were investigated by thermogravimetric analysis (TGA), limit oxygen index(LOI), fourier transform infrared spectra (FTIR) and scanning electron microscope (SEM). GMA grafted onto ramie fabrics was confirmed by The SEM and FTIR results. The grafting yield of GMA increased with an increase in the concentration of GMA and BP and ultraviolet photografting period. The grafting yield arrived 35.61 % when the GMA concentration and BP concentration were 30 %(v/v) and 0.3 mol/L for 20 min, respectively, and the fabrics remained good feel. Phosphorus in modified ramie fabrics promoted the formation of char in combustion process of ramie fabrics, and improved the flame retardant of ramie fabrics. The LOI of ramie fabric grafted GMA 50.65 % after amination and phosphorylation reached 38.6 %.

Key words: ramie fabrics ultraviolet grafting, flame retardant, glycidyl methacrylate, amination, phosphorylation

陈志军刘兴乔柳浩罗云英黄年华. 苎麻织物紫外光接枝阻燃改性研究[J]. 纺织学报, 2014, 35(4): 79-0.

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