三嗪基含氟扩链剂改性水性聚氨酯的合成
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Synthesis of triazine-based fluorinated chain extender modified waterborne polyurethane
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    摘要:

    利用三聚氰氯(CC)、八氟戊醇(OFP)和乙醇胺(MEA)间的反应先合成了三嗪基含氟扩链剂CC-F,在此基础上制备出系列三嗪基含氟扩链剂改性水性聚氨酯CC-FPUF。利用FTIR和1HNMR对其结构进行表征,并用DLS、XRD、XPS、SEM、WCA和电子万能试验机探究了CC-FPUF制备中所用CC-F的含量(以CC-F、IPDI、CMA-1044、DMPA、S104、TMP和TEA的总质量为基准,下同)对CC-FPUF的乳液粒径、聚合物形态、胶膜形貌、表面元素组成、疏水性能和力学性能的影响。结果表明,随着CC-F含量的增加,CC-FPUF的乳液粒径、胶膜疏水性能和胶膜拉伸强度均有所增加。当CC-F的含量达到8%(CC-FPUF-8)时,胶膜的水接触角最高达到125.8°,相比不含氟的水性聚氨酯(PU)和CC-FPUF-0(CC-F的含量为0)分别增加了60.9°和34.1°;此时胶膜的拉伸强度最大,相比CC-FPUF-0增加了24.47 MPa。胶膜CC-FPUF-8表现出优异的疏水性能和良好的力学性能。

    Abstract:

    A series of fluorine-containing waterborne polyurethanes (CC-FPUF) were synthesized based on triazine-based fluorinated chain extender (CC-F) prepared from cyanuric chloride (CC), Octafluoropentanol(OFP) and ethanolamine(MEA). The structure of CC-FPUF was characterized by FTIR and 1H NMR. Effect of the content of the CC-F in CC-FPUF preparation (based on the total quality of CC-F, IPDI, CMA-1044, DMPA, S104, TMP and TEA, the same below) on particle size of CC-FPUF emulsions, polymer crystalline form, morphology, surface element composition, hydrophobic properties and mechanical properties of CC-FPUF latex films was investigated in detail by DLS, XRD, XPS, SEM, WCA and electronic universal testing machine. The results showed that the latexes size, hydrophobic properties and tensile strength of the CC-FPUF films increased gradually with the increase of CC-F content. It is worth noting that when the content of CC-F reached 8% (CC-FPUF-8), the water contact angle on the CC-FPUF film reached up to 125.8°, which was increased by 60.9° and 34.1° respectively compared with the fluorine-free PU film and the CC-FPUF-0 (the content of CC-F is 0) film. Meanwhile, the tensile strength of the film was the largest and 24.47 MPa higher than the CC-FPUF-0 film. So, the CC-FPUF-8 film exhibits excellent hydrophobic properties and good mechanical properties.

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王文,许伟.三嗪基含氟扩链剂改性水性聚氨酯的合成[J].精细化工,2020,37(10):

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  • 收稿日期:2020-03-30
  • 最后修改日期:2020-05-29
  • 录用日期:2020-06-02
  • 在线发布日期: 2020-08-31
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