耐久型水性杂化无氟防水剂的制备及其性能  

Preparation and application of durable aqueous organic-inorganic hybrid fluorine-free water-repellant finishing agents

作　　者：马逸平 樊武厚[1,2,3] 胡晓 王斌 李林华 梁娟 吴晋川[1,4] 廖正科 MA Yiping;FAN Wuhou;HU Xiao;WANG Bin;LI Linhua;LIANG Juan;WU Jinchuan;LIAO Zhengke(Sichuan Textile Scientific Research Institute Co.,Ltd.,Chengdu,Sichuan 610083,China;High-tech Organic Fibers Key Laboratory of Sichuan Province,Chengdu,Sichuan 610083,China;Sichuan&Zhejiang Industrial Technology Research Institute of Printing and Dyeing,Chengdu,Sichuan 610083,China;Sichuan Yixin Technology Co.,Ltd.,Chengdu,Sichuan 610083,China)

机构地区：[1]四川省纺织科学研究院有限公司,四川成都610083 [2]高性能有机纤维四川省重点实验室,四川成都610083 [3]川浙印染产业技术研究院,四川成都610083 [4]四川益欣科技有限责任公司,四川成都610083

出　　处：《纺织学报》2024年第6期113-119,共7页Journal of Textile Research

基　　金：四川省自然科学基金项目(2022NSFSC0304);四川省省级科研院所科技成果转化项目(2023JDZH0008);高技术有机纤维四川省重点实验室开放基金资助项目(PLN2023-18)。

摘　　要：针对当前无氟防水剂整理织物耐久性不佳的问题,引入低表面能聚硅氧烷链段和长碳链十六烷基,并通过对硅溶胶乳液进行氨基改性以提高有机硅改性聚氨酯有机组分和十六烷基改性硅溶胶无机组分的界面作用,制备了一种耐久型水性杂化无氟防水剂,并将其应用于涤纶/棉织物的防水整理。研究了防水剂的硅溶胶组分中氨基硅烷偶联剂质量分数、焙烘温度等因素对织物防水性能及防水耐久性能的影响,考察了防水整理织物的表面形貌及对不同液体的防水效果。结果表明:当γ-氨丙基三乙氧基硅烷(KH-550)质量分数为1.5%,焙烘温度为160℃时,防水剂可在涤纶/棉织物表面形成微纳米尺寸的粗糙结构的拒水膜,水接触角可达131.8°;经20次标准洗涤后,织物的水接触角仍可维持在129°,表现出良好的耐水洗性能。Objective Fabrics with water-repellent finishing have been extensively favored by consumers as one of the most widely used functional fabrics,and hydrophobic coatings and their applications prospects attract interests from both the academic and industrial comunities.However,their application is hindered by some major bottlenecks,especially the poor durability.Therefore,a method for preparing hydrophobic coatings with excellent mechanical stability is urgently necessary.Method To tackle the poor durability of water-repellent finishing fabrics,this study innovatively introduced low surface energy polysiloxane segments and long carbon chain hexadecyl at the same time.A novel durable water-based hybrid fluorine-free water-repellant finishing agents(NSW)were prepared by amino modification of silica sol emulsion to enhance the interfacial interaction between the organic and inorganic components.This modification corresponded to the long-chain alkyl silane modified sol emulsion and polysiloxane modified waterborne polyurethane emulsion respectively.The specific methods used were described below.A polysiloxane modified polyurethane prepolymer(SiWPU)was synthesized through the polyaddition reaction of polydimethylsiloxane(PDMS),polyethylene glycol(PEG),dimethylol propionic acid(DMPA)and isophorone diisocyanate(IPDI).A method of the long-chain alkyl silane and amino modified sol emulsion(Si-NPs)was provided through the hydrolysis polycondensation reaction of hexadecyl trimethoxysilane(HDTMS),silane coupling agent(KH-550)and tetraethyl silicate(TEOS).Si-NPs were added drop by drop in the emulsification process of Si-WPU,silica nanoparticles were adhered to the polyurethane chain segment taking advantage of the difference in the rate of isocyanate group react with amino and hydroxyl group,and isocyanate group exhibits a higher rate of reaction with amino compared with hydroxyl group.Results The chemical composition of Si-NPs and NSW were investigated using Fourier transform infrared spectroscopy.The most stable emulsion was

关 键 词：无氟防水剂 防水整理 有机-无机杂化 功能性纺织品 

分 类 号：TS190.8[轻工技术与工程—纺织化学与染整工程]