摘要
以异佛尔酮二异氰酸酯(IPDI)、聚四氢呋喃二醇(PTMG1000)、1,4-丁二醇(BDO)、N-甲基二乙醇胺(MDEA)、三羟甲基丙烷(TMP)等为主要原料,通过全氟乙基辛醇(FEOH)封端改性,制备了含全氟烷基侧链的阳离子含氟水性聚氨酯乳液。通过红外光谱(FTIR)、热重分析(TG)对其结构与膜性能进行了表征,并且将其作为纸张防水防油剂用于表面施胶,对处理后纸张表面的水和液体石蜡接触角及纤维形态进行了研究。结果表明,聚氨酯分子链中的全氟烷基成膜时产生了较大取向作用,含氟基团向空气/聚合物界面伸展,有明显的"趋表"现象,这有利于形成低能表面,对聚合物内部分子形成了很好的保护作用,使涂膜具有较高的耐热降解性能。当表面施胶质量分数为0.3%时,纸张即可达到优异的防水防油效果,水接触角达到134.7°,液体石蜡接触角达到119.2°。
Cationic fluorinated waterborne polyurethane （WCFPU） emulsion containing perfluoroalkyl side chain was prepared by the reaction of isophorone isocyanate （IPDI）, polyether polyol （ PTMG1000 ）, N-methyldiethanolamine （ MDEA）, 1,4-butanediol （ BDO ）, trimethylol propane （TMP） and modified by 2-（ perfluorooctyl ） ethyl alcohol （FEOH）. The structure of the polymer and the performance of the film were characterized by means of fourier transform infared spectrometer （IR） , thermogravimetric analysis （TGA）. The cationic fluorinated waterborne polyurethane was applied as water- and oil-resistant agent in the film casting of paper processing;the contact angle of water and liquid paraffin and the fiber morphology of sized paper surface were also investigated. The results show that during the process of casting films, the fluorinated group stretched on the exterior interface of the air and the polymer, which was conducive to the formation of low energy surface and the effective protection of the inner molecules of the polymer, so that the films were endowed with excellent heat resistance property. The most excellent water- and oil-resistant property was attained when the film- casting mass fraction was 0.3%, and the contact angle of water was 134.7°, while that of liquid paraffin was 119.2°.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2011年第12期1224-1227,共4页
Fine Chemicals
基金
国家自然科学基金项目(50973057
20876093)
陕西科技大学科研启动基金项目(BJ11-10)~~
关键词
水性聚氨酯
全氟烷基侧链
阳离子型
纸张防水防油剂
造纸化学品
waterborne polyurethane
perfluoroalkyl side chain
cationic
paper water- and oil-resistant agent
paper-making chemicals
