纳米二氧化硅改性“Click”型侧链含氟聚氨酯的制备及在织物整理剂上的应用  

Preparation of Nano-silica Modified“Click”Polyurethane with Fluorine-containing Side Chains and Its Application on Fabric Finishing Agent

作　　者：章强 刘洪利 陈迎豪 李兴建 张宜恒[2] ZHANG Qiang;LIU Hongli;CHEN Yinghao;LI Xingjian;ZHANG Yiheng(School of Materials Science and Engineering,Linyi University,Linyi 276000,China;School of Chemical and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]临沂大学材料科学与工程学院,临沂276000 [2]青岛科技大学化学与分子工程学院,青岛266042

出　　处：《材料导报》2020年第14期14218-14222,共5页Materials Reports

基　　金：国家自然科学基金(51172116,21176128)。

摘　　要：以4,4′-二羟甲基-1,4-庚二炔为扩链剂制备了含有端炔功能基团的聚氨酯(PU),然后基于铜催化的炔基和叠氮基的1,3-偶极环加成点击化学(Click chemistry)反应将2-叠氮全氟辛基乙基醇酯(R f-N 3)接枝到PU侧链,制备了“Click”型侧链含氟PU。进一步将疏水改性的纳米二氧化硅(SiO 2)添加到“Click”型侧链含氟PU基体中,制备了“Click”型侧链含氟PU/纳米SiO 2复合材料(SiFPU)。采用红外光谱(FT-IR)、核磁氢谱(1H NMR)和能谱分析(EDS)表征了SiFPU的结构,研究了纳米SiO 2含量对SiFPU膜热稳定性和疏水性的影响,并考察了SiFPU在织物整理剂上的应用。结果表明,当R f-N 3占PU树脂的44%(质量分数,下同)时,随着纳米SiO 2含量从0%增大到2%,SiFPU的水接触角从104°增大到120°,最大失重时温度(T max)从323℃增大到348℃。当纳米SiO 2含量为1%时,用20 g/L SiFPU溶液处理后的织物的拒水性能即可达到最高级5级,此时被处理织物的吸水率从72.7%降低到6.6%。Polyurethane(PU)containing terminal-alkyne functional groups was prepared by using 4,4′-dimethylol-1,4-heptadiyne as a chain extender,and then“Click”PU with fluorine-containing side chains was prepared by grafting 2-azide perfluorooctyl ethyl alcohol ester(R f-N 3)onto the PU via copper-catalyzed 1,3-dipolar cycloaddition click chemistry reactions between alkynyl groups and azides.Furthermore,“Click”PU with fluorine-containing side chains/nano-silica composite(SiFPU)was prepared by adding hydrophobically modified nano-silica into the“Click”PU matrix.The structure of SiFPU was characterized by FT-IR,1H NMR and EDS.The effects of nano-silica content on the thermal stability and hydrophobicity of SiFPU films were investigated,and the application of SiFPU on fabric finishing agents was researched.The results show that when R f-N 3 accounts for 44wt%of PU resin,the water contact angle of SiFPU increases from 104°to 120°and maximum weight loss temperature(T max)of SiFPU increased from 323℃to 348℃as the nano-SiO 2 content increases from 0wt%to 2wt%in SiFPU.When the content of nano-SiO 2 is 1wt%,the water-repellent property of the fabric treated with 20 g/L SiFPU solution can reach the highest level 6,and the water absorption of the treated fabric is reduced from 72.7%to 6.6%.

关 键 词：含氟聚氨酯 点击化学 纳米二氧化硅 纳米复合材料 织物整理剂 

分 类 号：TQ32[化学工程—合成树脂塑料工业]