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Tunable Nanocellular Polymeric Monoliths Using Fluorinated Block Copolymer Templates and Supercritical Carbon Dioxide
Author(s) -
Yokoyama By H.,
Li L.,
Nemoto T.,
Sugiyama K.
Publication year - 2004
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400072
Subject(s) - copolymer , materials science , supercritical carbon dioxide , template , supercritical fluid , nanoscopic scale , chemical engineering , carbon dioxide , carbon fibers , polymer chemistry , nanotechnology , polymer , composite material , organic chemistry , chemistry , engineering , composite number
A novel, innocuous method which utilizes carbon dioxide to fabricate optically transparent nanocellular polymeric materials using a fluorinated block copolymer as the template is reported. The CO 2 ‐soluble fluorinated blocks effectively localize CO 2 in the nanoscopic domains. At 0 °C, with slow depressurization, the block copolymer exhibits CO 2 ‐pressure‐tunable nanocells of diameters between 10–30 nm, number densities of ∼10 16 cells cm –3 , and porosities of up to 50% (see Figure).
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