Self-organized honeycomb morphology of star-polymer polystyrene films View Full Text


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Article Info

DATE

1994-06

AUTHORS

Gilles Widawski, Michel Rawiso, Bernard François

ABSTRACT

AN important challenge in the preparation of porous polymer membranes for technological applications is to control both the size distribution and the relative positions of the pores. We have found a way to generate polymer films with an essentially monodisperse pore size, in which the pores are organized spontaneously into periodic hexagonal arrays. The films, which are 10–30 um thick, are produced by evaporating solutions of star-shaped polystyrene or polystyrene-polyparaphenylene block copolymers in carbon di-sulphide under a flow of moist gas. Empty spherical cells, about 0.2–10 µm in diameter, appear spontaneously in a hexagonal array, and the cells are open at the film surface. The use of star polymers, or of polymeric micelles, seems to be essential for obtaining this morphology. These membranes might find application in controlled release of drugs or other bioactive species, or as materials with useful optical properties, moulds or scaffolding for forming ordered microstructures, and model substrates for surface science. More... »

PAGES

387-389

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/369387a0

DOI

http://dx.doi.org/10.1038/369387a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1046973421


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