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Nanostructured Double Hydrophobic Poly(Styrene-b-Methyl Methacrylate) Block Copolymer Membrane Manufactured Via Phase Inversion Technique

机译：通过相转化技术制备的纳米结构双疏水性聚苯乙烯-b-甲基丙烯酸甲酯嵌段共聚物膜

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摘要

In this paper, we demonstrate the formation of nanostructured double hydrophobic poly(styrene-b-methyl methacrylate) (PS-b-PMMA) block copolymer membranes via state-of-the-art phase inversion technique. The nanostructured membrane morphologies are tuned by different solvent and block copolymer compositions. The membrane morphology has been investigated using FESEM, AFM and TEM. Morphological investigation shows the formation of both cylindrical and lamellar structures on the top surface of the block copolymer membranes. The PS-b-PMMA having an equal block length (PS160K-b-PMMA160K) exhibits both cylindrical and lamellar structures on the top layer of the asymmetric membrane. All membranes fabricated from PS160K-b-PMMA160K shows an incomplete pore formation in both cylindrical and lamellar morphologies during the phase inversion process. However, PS-b-PMMA (PS135K-b-PMMA19.5K) block copolymer having a short PMMA block allowed us to produce open pore structures with ordered hexagonal cylindrical pores during the phase inversion process. The resulting PS-b-PMMA nanostructured block copolymer membranes have pure water flux from 105-820 l/m2.h.bar and 95% retention of PEG50K
机译：在本文中，我们通过最先进的相转化技术证明了纳米结构的双疏水性聚苯乙烯-甲基丙烯酸甲酯-b-PMMA嵌段共聚物膜的形成。纳米结构的膜形态可通过不同的溶剂和嵌段共聚物组成进行调节。使用FESEM，AFM和TEM研究了膜的形态。形态学研究表明在嵌段共聚物膜的顶表面上既形成圆柱形结构又形成层状结构。具有相同嵌段长度的PS-b-PMMA（PS160K-b-PMMA160K）在不对称膜的顶层上既具有圆柱形结构又具有层状结构。在相转化过程中，由PS160K-b-PMMA160K制成的所有膜在圆柱形和层状形态中均显示不完整的孔形成。但是，具有短PMMA嵌段的PS-b-PMMA（PS135K-b-PMMA19.5K）嵌段共聚物使我们能够在相转化过程中产生具有规则六角形圆柱孔的开孔结构。所得PS-b-PMMA纳米结构嵌段共聚物膜的纯水通量为105-820 l / m2.h.bar，PEG50K的保留率为95％

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