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氟硅改性聚氨酯自组装膜的合成及性能

祖艳华1,姜鹏波1,宋爽1,于世钧1,蹇锡高2,靳奇峰1*   

  1. (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)
  • 收稿日期:2012-01-10 修回日期:2012-02-29 出版日期:2012-10-10 发布日期:2012-10-10
  • 通讯作者: 靳奇峰，讲师; Tel:0411-82159139; Fax:0411-82158171; E-mail:jinqifeng@dl.cn; 研究方向：高性能聚合物的开发及应用
  • 基金资助:
    辽宁省博士启动基金资助项目（20111066）

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

ZU Yanhua1, JIANG Pengbo1, SONG Shuang1, YU Shijun1, JIAN Xigao2, JIN Qifeng1*   

  1. (1.School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116021,China;
    2.Department of Polymer Science & Materials,Dalian University of Technology,Dalian 116012,China)
  • Received:2012-01-10 Revised:2012-02-29 Published:2012-10-10 Online:2012-10-10

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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。

关键词: 摩擦学性能, 氟硅改性聚氨酯, 自组装膜

Abstract: 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.

Key words: friction, fluorine and silicon modified polyurethane, self-assembly films

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