Authors: Eri Yoshida
Publish Date: 2015/07/08
Volume: 293, Issue: 8, Pages: 2437-2443
Abstract
The permeability of Rhodamine B Rh into bilayers comprised of amphiphilic block copolymers was explored using ionic segments incorporated in the hydrophobic chains The amphiphilic block copolymer consisting of a hydrophilic polymethacrylic acid block and a hydrophobic polymethyl methacrylaterandommethacrylic acid block containing 02 mol units of the 3sulfopropyl methacrylate potassium salt SpMA produced giant vesicles by photopolymerizationinduced selfassembly in an aqueous methanol solution The spherical vesicles were transformed into films as the SpMA ratio increased The SpMA units incorporated in the hydrophobic chains enhanced the Rh permeability into the bilayer whereas the vesicles without SpMA units captured no Rh molecules However the Rh was released from the hydrophobic phases in the isolation process of the bilayers by repeated sedimentationredispersion The permeability enhancement was attributed to the pore formation in the bilayers by the capture and release of the Rh by the SpMA units in the hydrophobic phases
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