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首页> 外文期刊>RSC Advances >POSS-tethered fluorinated diblock copolymers with linear- and star-shaped topologies: synthesis, self-assembled films and hydrophobic applications
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POSS-tethered fluorinated diblock copolymers with linear- and star-shaped topologies: synthesis, self-assembled films and hydrophobic applications

机译：具有线性和星形拓扑的可束缚氟化二嵌段共聚物：合成，自组装薄膜和疏水性应用

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摘要

Polyhedral oligomeric silsesquioxane (POSS) tethered fluorinated diblock copolymers including linear-shaped ap-POSS-PMMA-b-PDFHM and star-shaped s-POSS-(PMMA-b-PDFHM)(16) are synthesized by octakis(dibromoethyl)POSS (POSS-(Br)(16)) and aminopropylisobutyl POSS (ap-POSS) initiating methylmethacrylate (MMA) and dodecafluoroheptylmethacrylate (DFHM). In THF solution, both diblock copolymers could self-assemble into 200 nm core/shell micelles with a POSS/PDFHM core and 70-80 nm PMMA shell. These micelles are able to produce typical films with a fluorine-rich top-surface and POSS-gathered sub-surface. Although PDFHM segments and POSS cages are competitively migrating onto the film surface, the migration of the PDFHM segments is actually improved by the POSS cages. Comparatively, the surface of the ap-POSS-PMMA-b-PDFHM film is much more rough and fluorine-rich than the s-POSS-(PMMA-b-PDFHM)(16) film, therefore, the ap-POSS-PMMA-b-PDFHM film has higher viscoelasticity and higher oleophobicity, but a little lower hydrophobicity than the s-POSS-(PMMA-b-PDFHM)(16) film. The hydrophobic application of both linear- and star-shaped topologies to glass, cotton fabric and stone substrates reveals that the treated samples exhibit superhydrophobicity for the cotton fabric (>150 degrees) and obvious hydrophobicity for the stone and glass (>135 degrees) in terms of resistance to water and other liquids like coffee, milk, coke and green tea. It is believed that the properties of self-assembled films and the hydrophobic applications are related closely to the topologies of block copolymers.
机译：多面体低聚二甲基硅氧烷（POSS）包括线性形状的AP-POSP-PMMA-B-PDFHM和星状S-POSS-（PMMA-B-PDFHM）（16）的含有线性氟化二嵌段共聚物由OCTAKIS（二溴乙基）合成（ POSS-（BR）（16））和氨基丙基异丁基POSS（AP-POSS）引发甲基丙烯酸甲酯（MMA）和十二烷氟庚二甲基丙烯酸酯（DFHM）。在THF溶液中，两种二嵌段共聚物可以用POSS / PDFHM核和70-80nm PMMA壳体自组装成200nm芯/壳胶束。这些胶束能够产生具有富含氟的顶表面和足够聚集的子表面的典型膜。虽然PDFHM段和足以笼竞争地迁移到薄膜表面上，但PDFHM段的迁移实际上是通过笼子改善。相比之下，AP-POSP-PMMA-B-PDFHM膜的表面比S-POSS-（PMMA-B-PDFHM）（16）膜更粗糙，富含氟 - POMMMA（16）膜-B-PDFHM膜具有较高的粘弹性和更高的疏油性，但疏水性略低于S-POSS-（PMMA-B-PDFHM）（16）膜。线性和星形拓扑到玻璃，棉花织物和石材基材的疏水应用表明，经过处理的样品对棉织物（> 150度）的超水性表现出具有显着的疏水性（> 135度）耐水和其他液体等耐咖啡，牛奶，焦炭和绿茶。据信，自组装薄膜和疏水应用的性质与嵌段共聚物的拓扑相关。

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  • 来源
    《RSC Advances》 |2015年第68期|共11页
  • 作者

    Pan Aizhao; Yang Shao; He Ling;

  • 作者单位

    Xi An Jiao Tong Univ Sch Sci Dept Chem Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Sch Sci Dept Chem Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Sch Sci Dept Chem Xian 710049 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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