Control of pore hydrophilicity in ordered nanoporous polystyrene using an AB/AC block copolymer blending strategy

Huiming Mao, Pedro L. Arrechea, Travis S. Bailey, Bret J S Johnson, Marc A. Hillmyer

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Ordered nanoporous plastics with hydrophilic pore surfaces were prepared by the degradative removal of polylactide from a self-organised, multi-component composite containing two block copolymers: polystyrene-polylactide and polystyrene-polyethylene oxide. The solid-state characterization of blends containing up to 12 wt.% polyethylene oxide was consistent with nanoscopic cylinders of mixed polyethylene oxide and polylactide hexagonally packed in a polystyrene matrix. Orientation of these materials through simple channel die processing resulted in good cylinder alignment. Subsequent methanolysis/ hydrolysis of the polylactide component gave nanoporous polystyrene with polyethylene oxide coated pores. The resulting nanoporous materials were able to imbibe water, in contrast to nanoporous polystyrene with no polyethylene oxide component.

Original languageEnglish (US)
Pages (from-to)149-162
Number of pages14
JournalFaraday Discussions
Volume128
DOIs
StatePublished - 2005

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