氟硅改性聚氨酯自组装膜的合成及其性能  

Synthesis and Properties of Fluorine and Silicon Modified Polyurethane Self-assembly Films

作　　者：祖艳华[1] 姜鹏波[1] 宋爽[1] 于世钧[1] 蹇锡高[2] 靳奇峰[1] 

机构地区：[1]辽宁师范大学化学化工学院,大连116021 [2]大连理工大学高分子材料系,大连116012

出　　处：《应用化学》2012年第10期1138-1142,共5页Chinese Journal of Applied Chemistry

基　　金：辽宁省博士启动基金资助项目(20111066)

摘　　要：以甲苯二异氰酸酯、聚酯二元醇、2,2-二羟甲基丙酸和十三氟-1-辛醇等为原料合成了氟醇封端的聚氨酯预聚体(FPU)。通过FPU侧链含有的羧基官能团与异氰酸酯基硅烷偶联剂(Si-NCO)反应制备了含硅氧烷官能团功能性树脂(FPUSi)。采用红外光谱(FT-IR)对产物结构进行了表征,用TGA和水接触角等测试了自组装薄膜的表面性能。结果表明,在N2气氛围下,FPU和FPUSi的热失重温度(T5%)均为178℃;硅基表面经FPUSi自组装膜修饰后,其表面水接触角达到81°。微摩擦测试结果表明,当载荷为400 mN时,FPUSi自组装薄膜的稳定摩擦系数达到0.09。Fluorinated polyurethane prepolymer （FPU） was synthesized using 2, 4-toluene diisocyanate （TDI）, poly （ ethylene glycol ） adipate （ PEA ）, dimethylol propionic acid （ DMPA ）, fluoride monohydric alcohol（F-OH）. FPUSi was then synthesized by the in situ acylation reaction of isocyanatopropyltriethoxysilane （Si-NCO） with FPU forming a polymer bearing triethoxysilyl groups. The structures of polymers and self- assembled fluorocarbon films were characterized by FT-IR. The surface properties of self-assembled films were tested by atomic force microscopy et al. FPU and FPUSi showed thermal stability with 5% mass loss at 178 ℃ by thermal gravimetric analysis in nitrogen. The contact angle of the obtained FPUSi self-assembled film was improved to 81°. The tribological experiment showed that the self-assembled films had a very low friction coefficient（ about 0. 09） and good anti-wear properties under a load of 400 mN. The improved tribological properties of the modified substrate were attributed to the good adherence of FPUSi self-assembled films on the substrate and synergy of FPUSi matrix.

关 键 词：摩擦学性能 氟硅改性聚氨酯 自组装膜 

分 类 号：O631.5[理学—高分子化学]