Self-assembly in casting solutions of block copolymer membranes
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Marques, D. and Vainio, U. and Chaparro, N. and Calo, V. and Bezahd, A. and Pitera, J. and Peinemann, K. et al. 2013. Self-assembly in casting solutions of block copolymer membranes. Soft Matter. 9 (23): pp. 5557-5564.
Department of Applied Geology
Membranes with exceptional pore regularity and high porosity were obtained from block copolymer solutions. We demonstrate by small-angle X-ray scattering that the order which gives rise to the pore morphology is already incipient in the casting solution. Hexagonal order was confirmed in PS-b-P4VP 175k-b-65k solutions in DMF/THF/dioxane with concentrations as high as 24 wt%, while lamellar structures were obtained in more concentrated solutions in DMF or DMF/dioxane. The change in order has been understood with the support of dissipative particle dynamic modeling. © 2013 The Royal Society of Chemistry.
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