聚乙烯基膦酸/多乙烯多胺层层自组装阻燃棉织物的制备及其性能  

Preparation and properties of flame retardant cotton fabrics by layer-by-layer assembly of polyvinylphosphonic acid and polyethylene polyamine

作　　者：钱耀威 殷连博 李家炜[1,2,3] 杨晓明 李耀邦 戚栋明 QIAN Yaowei;YIN Lianbo;LI Jiawei;YANG Xiaoming;LI Yaobang;QI Dongming(Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing&Finishing,Zhejiang Sci-Tech University,Hangzhou,Zhejiang310018,China;Zhejiang Provincial Innovation Center of Advanced Textile Technology,Shaoxing,Zhejiang312000,China;Key Laboratory of Green Cleaning Technology&Detergent of Zhejiang Province,Lishui,Zhejiang323000,China;Zhejiang Ouren New Materials Co.,Ltd.,Jiaxing,Zhejiang314100,China)

机构地区：[1]浙江理工大学绿色低碳染整技术浙江省工程研究中心,浙江杭州310018 [2]浙江省现代纺织技术创新中心,浙江绍兴312000 [3]浙江省绿色清洁技术及洗涤用品重点实验室,浙江丽水323000 [4]浙江欧仁新材料有限公司,浙江嘉兴314100

出　　处：《纺织学报》2023年第9期144-152,共9页Journal of Textile Research

基　　金：中国纺织工业联合会应用基础研究项目(J202207);浙江省“尖兵”“领雁”研发攻关计划项目(2022C03052);中国博士后科学基金资助项目(2022M722816);浙江省大学生科技创新活动计划项目(2022R06B062)。

摘　　要：为了实现棉织物的环保阻燃,以乙烯膦酸(VPA)作为单体,合成聚乙烯基膦酸(PVPA),并与多乙烯多胺(PEPA)构建阻燃体系,采用层层自组装(LBL)法在棉织物表面制备阻燃涂层,借助扫描电子显微镜、氧指数测定仪、锥型量热仪、热重分析仪和红外光谱仪联用技术等分析了涂层阻燃棉织物的表面形貌和阻燃性能,探究了气相和凝聚相阻燃机制,并测定了阻燃处理后棉织物的物理性能。结果表明:采用LBL法制备PVPA/PEPA涂层阻燃整理棉织物,当整理层数达到12时,阻燃棉织物的极限氧指数(LOI)达到29.8%,垂直燃烧试样离开火焰后自熄,并经10次标准洗涤后,LOI值为27.1%,相较于纯棉织物,阻燃棉织物的热释放量和总热释放量分别降低了16.8%和19.7%。通过形成磷酸化结构改善了炭保护层的稳定性,阻隔了气体及热量的传递,增强了棉织物的阻燃性能,同时赋予棉织物良好的力学性能。Objective Cotton fibers are ideal materials for clothing,furniture and bedding because of good hygroscopicity,wear comfort and biodegradabity.However,cotton fabrics are flammable and have been identified as one of the main sources of household fire.This research aims to enhance the flame retardance of cotton fabrics using a flame retardant system composed of polyvinylphosphonic acid(PVPA)and polyethylene polyamine(PEPA)to achieve environmental-friendly flame retardant cotton fabrics.Method Vinylphosphonic acid(VPA)was used as a monomer to synthesize PVPA,and a flame retardant coating system on cotton fabrics with PVPA and PEPA was constructed via layer-by-layer assembly(LBL).The surface morphology,flame retardancy and physical properties of coated cotton fabrics were measured,and the flame-retardant mechanism of gas phase and condensed phase were explored.Results In this study,the VPA was successfully prepared using 2,2′-azobis[2-methylpropionamidine]dihydrochloride(AIBA)as initiator,and its conversion rate reached 93.6%by means of 31 P nuclear magnetic resonance(31 P NMR)(Fig.2).When the PVPA/PEPA flame-retardant system was prepared by the layer-by-layer assembly method,the flame retardant coating formed evenly on cotton fabric surfaces through the measurement of Fourier transform infrared(FT-IR)and scanning electron microscopy(SEM)(Fig.3 and 5).When the number of finishing layers reached 12,the weight gain of the coated cotton fabric was 38.0%,and the limiting oxygen index(LOI)of flame retardant cotton fabric reached 29.8%.The research showed that the flame of the coated cotton fabric self-extinguished and the damaged length was 31 mm during the vertical burning test.After 10 standard washing cycles,the LOI value of the coated cotton fabric was 27.1%(Tab.1).The cone calorimetric test showed that the peak heat release(PHRR)and total heat release(THR)of coated cotton fabrics decreased by 16.8%and 19.7%,respectively,lower than that of uncoated cotton fabrics(Fig.7).The above results indicated that the coated cot

关 键 词：棉织物 阻燃 层层自组装 聚乙烯基膦酸 多乙烯多胺 

分 类 号：TS193.5[轻工技术与工程—纺织化学与染整工程]