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Issue 35, 2016, Issue in Progress
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Nanostructured double hydrophobic poly(styrene-b-methyl methacrylate) block copolymer membrane manufactured via a phase inversion technique

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Abstract

In this paper, we demonstrate the formation of nanostructured double hydrophobic poly(styrene-b-methyl methacrylate) (PS-b-PMMA) block copolymer membranes via a 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, with an equal block length (PS160 K-b-PMMA160 K), exhibits both cylindrical and lamellar structures on the top layer of the asymmetric membrane. All membranes fabricated from PS160 K-b-PMMA160 K show incomplete pore formation in both cylindrical and lamellar morphologies during the phase inversion process. However, the PS-b-PMMA (PS135 K-b-PMMA19.5 K) block copolymer, with 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 m−2 h bar and 95% retention of PEG50 K.

Graphical abstract: Nanostructured double hydrophobic poly(styrene-b-methyl methacrylate) block copolymer membrane manufactured via a phase inversion technique

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Supplementary files

Article information


Submitted
26 Jan 2016
Accepted
09 Mar 2016
First published
11 Mar 2016

RSC Adv., 2016,6, 29064-29071
Article type
Paper

Nanostructured double hydrophobic poly(styrene-b-methyl methacrylate) block copolymer membrane manufactured via a phase inversion technique

M. Karunakaran, R. Shevate and K. Peinemann, RSC Adv., 2016, 6, 29064
DOI: 10.1039/C6RA02313D

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