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首页> 外文期刊>Journal of Applied Polymer Science >Improving hydrophobicity of polyurethane by PTFE incorporation
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Improving hydrophobicity of polyurethane by PTFE incorporation

机译：通过掺入PTFE改善聚氨酯的疏水性

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A simple and facile method was established of incorporating polytetrafluoroethylene (PTFE) on to polyurethane (PU) to improve hydrophobicity of PU by incorporating low levels of fluorine at a molecular level. Nanocomposites were made by preparing PU in the presence of PTFE using seeded miniemulsion polymerization method. The resulting PTFE/PU nanocomposites were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectrometry, differential scanning calorimetric, and thermo gravimetric analysis (TGA). FTIR and TEM indicated changes observed in their structure, size and morphology. The water contact angle of PTFE/PU nanocomposite films increased with increasing amount of PTFE and more on blending with silica nanoparticles but a slight decrease in thermal stabilities of SiO2/PTFE/PU nanocomposites were noticed. The hydrophobicity imparted by PTFE to PU surface was found to be at its best for 1 : 2 PTFE/PU latex film. (C) 2015 Wiley Periodicals, Inc.
机译：建立了一种简单易行的方法，将聚四氟乙烯（PTFE）掺入聚氨酯（PU），以通过在分子水平上掺入低含量的氟来提高PU的疏水性。纳米复合材料是通过使用种子细乳液聚合法在PTFE存在下制备PU制成的。所得的PTFE / PU纳米复合材料通过透射电子显微镜（TEM），傅立叶变换红外（FTIR）光谱，差示扫描量热法和热重分析（TGA）进行表征。 FTIR和TEM表明其结构，大小和形态发生了变化。 PTFE / PU纳米复合材料薄膜的水接触角随PTFE含量的增加而增加，并且在与二氧化硅纳米粒子共混时更大，但是注意到SiO2 / PTFE / PU纳米复合材料的热稳定性略有下降。发现由PTFE赋予PU表面的疏水性对于1：2 PTFE / PU乳胶膜而言是最佳的。 （C）2015威利期刊公司

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