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首页> 外文期刊>RSC Advances >Morphology and wettability control of honeycomb porous films of amphiphilic fluorinated pentablock copolymers via breath figure method
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Morphology and wettability control of honeycomb porous films of amphiphilic fluorinated pentablock copolymers via breath figure method

机译：两亲氟化五嵌段共聚物蜂窝多孔膜的形态和润湿性的呼吸指数法控制。

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Amphiphilic pentablock copolymers of poly (trifluoroethyl methacrylate)-b-poly (methyl methacrylate)-b-poly (ethylene glycol)-b-poly (methyl methacrylate)-b-poly (trifluoroethyl methacrylate) (PTFEMA-b-PMMA-b-PEG-b-PMMA-b-PTFEMA) with three different block ratios as well as molecular weights were used to fabricate honeycomb structured porous films through the breath figure technique. Several critical influencing factors such as macromolecular structures, solvent properties, copolymer concentrations and the substrates were investigated to control the morphology of the pores. The results showed that chloroform utilized as a solvent with an appropriate concentration of 45 mg mL(-1) on the substrate of silicon wafer offered the optimum condition. It could be evidenced that the pore sizes of the honeycomb films were increased by enhancing the molecular weight of the copolymer. In addition, an increase in the copolymer concentration leads to a decrease in the pore size, and even causes a few porous structures to disappear. The viscosity of the liquid substrates also affects the pore size, and it was found that a larger pore size was formed with an increase in the viscosity. The porous films possessed better hydrophobic and oleophobic properties than the flat films. In addition, the pincushion structure films exhibited the best hydrophobic and oleophobic properties and an excellent water-adhesion ability in the reverse state. This work may facilitate our understanding of the breath figure process and assist us in preparing films under different conditions, which show different perspectives as micro-suckers, hydrophobic and oleophobic membranes.
机译：聚（甲基丙烯酸三氟乙酯）-b-聚（甲基丙烯酸甲酯）-b-聚（乙二醇）-b-聚（甲基丙烯酸甲酯）-b-聚（甲基丙烯酸三氟乙酯）的两亲五嵌段共聚物（PTFEMA-b-PMMA-b-具有三种不同嵌段比和分子量的PEG-b-PMMA-b-PTFEMA）通过呼吸图技术用于制备蜂窝结构的多孔膜。研究了一些关键的影响因素，例如大分子结构，溶剂性能，共聚物浓度和底物，以控制孔的形态。结果表明，氯仿作为溶剂在硅片基板上的合适浓度为45 mg mL（-1）提供了最佳条件。可以证明，通过提高共聚物的分子量可以增加蜂窝膜的孔径。另外，共聚物浓度的增加导致孔径的减小，甚至导致一些多孔结构消失。液体基质的粘度也影响孔径，并且发现随着粘度的增加形成更大的孔径。多孔膜具有比平膜更好的疏水性和疏油性。另外，枕形结构膜在相反的状态下表现出最好的疏水和疏油性能以及优异的水粘附能力。这项工作可能有助于我们了解呼吸图过程，并帮助我们在不同条件下制备膜，这些膜表现出不同的观点，如微型吸盘，疏水膜和疏油膜。

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