生物质植酸改性聚氨酯涂层锦纶6织物的制备及其阻燃性能  

Preparation and flame-retardant performance of coated polyamide 6 fabrics with biomass phytic acid modified polyurethane

作　　者：程献伟 刘亚文 关晋平[1,2] 陈瑞 CHENG Xianwei;LIU Yawen;GUAN Jinping;CHEN Rui(College of Textile and Clothing Engineering,Soochow University,Suzhou,Jiangsu 215021,China;Key Laboratory of Flame Retardancy Finishing of Textile Materials(CNTAC),Soochow University,Suzhou,Jiangsu 215021,China;Jiangsu Hengli Chemical Fiber Co.,Ltd.,Suzhou,Jiangsu 215226,China)

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021 [2]苏州大学纺织行业纺织材料阻燃整理重点实验室,江苏苏州215021 [3]江苏恒力化纤股份集团有限公司,江苏苏州215226

出　　处：《纺织学报》2024年第6期120-126,共7页Journal of Textile Research

基　　金：苏州市产业前瞻与关键核心技术项目(SYC2022017)。

摘　　要：针对聚氨酯涂层锦纶6织物阻燃性能差、熔滴严重的问题,通过采用生物质植酸对水性聚氨酯进行改性,开发环保高效的阻燃体系对锦纶6织物进行涂层改性。测试分析了涂层锦纶6织物的阻燃性能、耐水洗性能、耐静水压、热稳定性和阻燃机制等。研究结果表明:聚氨酯涂层锦纶6织物在垂直燃烧测试中完全燃烧,损毁长度为30 cm,熔滴引燃脱脂棉,植酸/植酸钠改性聚氨酯涂层锦纶6织物在垂直燃烧中能够自熄,无熔滴产生,损毁长度降低至12.4 cm,极限氧指数升高至29.0%;经过10次水洗后涂层锦纶6织物仍能自熄,具有较好的阻燃性能和耐水洗性能;涂层锦纶6织物的热分解提前,经热分解后磷元素保留在残炭中,参与成炭,植酸盐主要通过固相阻燃机制提高涂层锦纶6织物的阻燃性能。Objective Polyurethane(PU)-coated polyamide 6(PA6)fabrics are widely used in various applications such as parachutes,luggage fabrics,tent covers,and other canopy materials.However,the PU-coated PA6 fabrics are highly flammable and cannot meet the fire-proof regulations.Besides,the generation of droplets during combustion can further increase the risk of fire.Therefore,it is essential to develop an environmentally friendly and efficient flame-retardant system to enhance the flame retardancy of PU-coated PA6 fabrics.Phytic acid(PA)is primarily sourced from plant seeds,roots,and stems,making it a valuable resource,the advantages of which include natural degradability,eco-friendliness,and high phosphorus content(28%).This study aims to investigate the effectiveness of biomass phytate salt in modifying water-based PU coatings to improve the flame retardancy and reduce the dripping behavior of coated PA6 fabrics.Method Waterproof PA6 fabrics with grade 4 waterproof performance were developed to prevent permeation during the PU coating process.The phytate salt flame-retardant was prepared by combining PA and sodium phytate to a pH of 7.5 with a mass ratio of 5∶17.The phytate salt was then incorporated into the PU resin along with the capping polyisocyanate crosslinker 903.The resulting flame-retardant PU was applied to the PA6 fabrics using a laboratory small-scale scraper,and the coated PA6 fabrics were pre-dried at 110℃for 3 min and baked at 150℃2 for 3 min.The coating add-on to the fabrics was controlled to 50,100,and 150 g/m to achieve specific performance characteristics.Results The flame retardancy,washing resistance,static water pressure resistance,thermal stability,and flame-retardant mechanism of coated PA6 fabrics were analyzed.The results suggested that the phytate salt was highly compatible with PU and did not significantly affect its film-forming performance.PA6 fabrics coated with phytate salt-modified PU exhibited the self-extinguishing properties during the vertical burning test without producing m

关 键 词：锦纶6织物 聚氨酯 植酸 阻燃涂层 阻燃织物 功能纺织品 

分 类 号：TS156[轻工技术与工程—纺织材料与纺织品设计]