聚乳酸非织造布植酸/壳聚糖/硼酸一浴法阻燃整理  

One bath flame retardant finishing of polylactic acid nonwoven by phytic acid/chitosan/boric acid

作　　者：张广知 杨甫生 方进 杨顺 ZHANG Guangzhi;YANG Fusheng;FANG Jin;YANG Shun(School of Textile and Garment,Anhui Polytechnic University,Wuhu,Anhui241000,China)

机构地区：[1]安徽工程大学纺织服装学院,安徽芜湖241000

出　　处：《纺织学报》2023年第10期120-126,共7页Journal of Textile Research

基　　金：安徽省教育厅高校自然科学研究重点项目(KJ2020A0353)。

摘　　要：为实现聚乳酸非织造布的阻燃抗熔滴功能,以壳聚糖(CS)、植酸(PA)、无机硼酸(BA)为主要原料,采用一浴法对聚乳酸非织造布进行阻燃整理。借助傅里叶红外光谱仪、扫描电镜、X射线能谱仪和热重分析仪、垂直法织物燃烧性能测试仪等表征和评价了聚乳酸非织造布的化学结构、表面形貌及表面元素分布、热稳定性能和阻燃性能。结果表明:聚乳酸非织造布经一浴法处理后,续燃、阴燃时间均为0 s,无熔滴,损毁长度仅为11.3 cm,极限氧指数为34.6%;壳聚糖、植酸、硼酸以及复合物共沉积覆盖在聚乳酸纤维上,且磷、硼、氮等元素质量分数分别达到5.26%、12.91%、4.26%;氮气气氛下,阻燃处理样起始分解温度降低了139.3℃,800℃时的残炭量达到14.57%;PA/CS/BA一浴法生物质阻燃体系提高了聚乳酸非织造布的阻燃抗熔滴效果和热稳定性,符合凝聚相阻燃机制。该生物质阻燃体系为聚乳酸纺织品提供了一种新的环保阻燃和抗熔滴的策略,具有较好的市场应用潜力。Objective Polylactic acid(PLA)fiber is an eco⁃friendly thermoplastic degradable synthetic fiber,which has biocompatibility and easy biodegradability but poor flame retardancy and easy to produce droplets.Biomass flame retardant has the advantages of innocuity,harmless and easy biodegradation.In order to solve the problem of flame retardancy and droplet resistance of PLA fiber products,it is urgent to develop flame retardancy technology for PLA fiber biomass to improve its flame retardancy and droplet resistance.Method The subject design uses biomass chitosan(CS),biomass phytic acid(PA),and inorganic boric acid(BA)as the main raw materials,and uses the one bath method to finish the polylactic acid nonwovens with flame retardancy and anti⁃dripping,so as to improve their flame retardancy and anti⁃dripping performance.FT⁃IR,SEM,EDS and TG were used to characterize the chemical structure,surface morphology,surface element distribution,and thermal stability of flame retardant polylactic acid nonwovens.The flammability of flame retardant polylactic acid nonwovens was evaluated by vertical flammability tester and limiting oxygen index tester.Results After the one bath method treatment of polylactic acid nonwovens,many granular or flaky substances co⁃deposited on the surface of the polylactic acid fiber,and the fiber surface became rough(Fig.3),indicating that chitosan,phytic acid,boric acid and composites co⁃deposited on the fiber.After the one bath method treatment of polylactic acid nonwovens,the continuous burning and smoldering time of the flame retardant treated samples are zero,only a small amount of melting shrinkage without dripping,the carbon length is only 11.3 cm,and the limiting oxygen index of the original sample is 21.0%increased to 34.6%of the treated samples(Fig.2 and Tab.1),which improves the flame retardant and anti⁃dripping effect of polylactic acid nonwovens.After the one bath method treatment of polylactic acid nonwovens,the flame retardant treated samples contain not only carbon and ox

关 键 词：聚乳酸纤维 非织造布 植酸 壳聚糖 阻燃整理 一浴法 

分 类 号：TS195.6[轻工技术与工程—纺织化学与染整工程]