From micelle supramolecular assemblies in selective solvents to isoporous membranes
AuthorsNunes, Suzana Pereira
Behzad, Ali Reza
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Advanced Membranes and Porous Materials Research Center
Physical Sciences and Engineering (PSE) Division
Imaging and Characterization Core Lab
Chemical and Biological Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Advanced Nanofabrication, Imaging and Characterization Core Lab
Nanostructured Polymeric Membrane Lab
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AbstractThe supramolecular assembly of PS-b-P4VP copolymer micelles induced by selective solvent mixtures was used to manufacture isoporous membranes. Micelle order in solution was confirmed by cryo-scanning electron microscopy in casting solutions, leading to ordered pore morphology. When dioxane, a solvent that interacts poorly with the micelle corona, was added to the solution, polymer-polymer segment contact was preferential, increasing the intermicelle contact. Immersion in water gave rise to asymmetric porous membranes with exceptional pore uniformity and high porosity. The introduction of a small number of carbon nanotubes to the casting solution improved the membrane stability and the reversibility of the gate response in the presence of different pH values. © 2011 American Chemical Society.
PublisherAmerican Chemical Society (ACS)
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