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KMID : 1059519900340040377
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Journal of the Korean Chemical Society
1990 Volume.34 No. 4 p.377 ~ p.383
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Transport Characteristics of Alcohol Solutes through Copolymer Hydrogel Membranes Containing Poly(2-Hydroxyethylmethacrylate)
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Park You-Mi
Kim Un-Sik
Sung Yong-Kiel
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Abstract
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Three kinds of hydrogel membranes were prepared by the copolymerization of 2-hydroxyethylmethacrylate (HEMA) with acrylamide, N, N-dimethylamide and methylmethacrylate in the presence of solvent and crosslinker respectively. The equilibrium water content, relative permeability and partition coefficient of the membranes for alcohol solutes were measured. It has been found that the permeation of organic solute occurs through the water-filled regions in the hydrogel membrane, and that the gpermeability coefficient of organic solute depends on the molecular size. But the permeability of organic solute was controlled by the interaction of solute-membrane at the low water content. By the partition data, it has been shown that the partition of solute is only controlled by hydrophobic interaction between solute and membrane. The diffusion coefficient data were interpreted on the basis of water-solute interaction. It has been found that the diffusion of organic solute is determined by the free volume of water in the membrane, and that hardly depends on polarity-polarizability and hydrogen bonding ability between water and solute.
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