Journal
POLYMER
Volume 153, Issue -, Pages 86-94Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2018.08.006
Keywords
Honeycomb-patterned film; Carboxyl functionalization; Interfacial reaction; Breath figure method; Polyimide
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Funding
- National Research Foundation of Korea [2016-R1D1A1B03930614]
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Carboxyl group functionalization in honeycomb-patterned porous (HCP) films was obtained by breath figure process using polyimide (PI) which can react with KOH humidity at the polymer solution/aqueous alkali droplet interface to form carboxyl groups. PI containing CO-NR2 imide ring group reacts with KOH for imide ring-cleavage reaction by interfacial reaction. In order to obtain pore-selective carboxyl group functionalized PI HCP films, we have suggested a new strategy introducing KOH humidity with time interval after using initial water humidity during breath figuring process. The carboxyl group functionalized pores can be applied to obtain ordered microarray of biological and inorganic materials, which have potential applications in biosensors, separations, medical biology, etc.
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