✦ LIBER ✦

Signal-responsive gating of porous membranes by polymer brushes

✍ Scribed by Yoshihiro Ito; Yong Soon Park

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 276 KB
Volume: 11
Category: Article
ISSN: 1042-7147
DOI: 10.1002/1099-1581(200003)11:3<136::aid-pat961>3.0.co;2-f

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✦ Synopsis

Various types of signal-responsive polymers were grafted on surfaces of porous membranes as polymer brushes. The grafted polymers shrank and extended in response to environmental signals, such as pH, ionic strength, temperature, redox reaction and photo-irradiation. The pore size was regulated by the extent of the polymer brush. The phenomenon was observed in situ by atomic force microscopy. As a result, the substance permeation through the porous membrane was controlled in response to the signals. The permeation control was rapid in comparison with hygrogel-type membranes, and was reversibly performed.

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