置換ポリアセチレン膜中の気体および液体の透過

概要

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Studies on the permeation of substances through membranes of substituted polyacetylenes, especially poly [1- (trimethylsilyl) -1-propyne] [poly (TMSP)] are reviewed : Poly (TMSP) exhibits extremely high gas permeability among all the existing polymers, which is due to both of the solubility and diffusivity of gases being large. The solubility and diffusivity in other substituted polyacetylenes are also discussed. For the decrease of the permeability of poly (TMSP) with time, several mechanisms such as structural reluxation, adsorption, and oxidation have been suggested. Since the separation factor, PO2/PN2, of the polymer is rather small, some methods of increasing it have been attempted. Poly (TMSP) shows high apparent permeability also to oxygen dissolved in water. Although a large resistance of boundary layer exists in the permeation, the permeability at infinite membrane thickness agrees with that for gaseous oxygen. Like poly (dimethylsiloxane), poly (TMSP) permeates ethanol preferentially in the ethanol-water pervaporation. The permselectivity of substituted polyacetylenes greatly depends on the kind of substituents
日本膜学会の論文