Ultraporous films with uniform nanochannels by block copolymer micelles assembly

S.P. Nunes, R. Sougrat, B. Hooghan, A. Dalaver, A.R. Behzad, L. Zhao, N. Pradeep, I. Pinnau, U. Vainio, K.-V. Peinemann
Macromolecules, 43, pp. 8079-8085, (2010)

Ultraporous films with uniform nanochannels by block copolymer micelles assembly

Keywords

Copolymers

Abstract

​Films with high pore density and regularity that are easy to manufacture by conventional large-scale technology are key components aimed for fabrication of new generations of magnetic arrays for storage media, medical scaffolds, and artificial membranes. However, potential manufacture strategies like the self-assembly of block copolymers, which lead to amazing regular patterns, could be hardly reproduced up to now using commercially feasible methods. Here we report a unique production method of nanoporous films based on the self-assembly of copper(II) ion−polystyrene-b-poly(4-vinylpyridine) complexes and nonsolvent induced phase separation. Extremely high pore densities and uniformity were achieved. Water fluxes of 890 L m−2 h−1 bar−1 were obtained, which are at least 1 order of magnitude higher than those of commercially available membranes with comparable pore size. The pores are also stimuli (pH)-responsive.

Code

DOI: 10.1021/ma101531k

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