Citation: WANG Xinwei, SHI Yanqiao, CHEN Guanwen. ORGANIC PERMSELECTIVE PERVAPORATION CHARACTERISTICS OF POLY(SILYLPROPYNE) AND COPOLYMER DENSE MEMBRANES[J]. Chinese Journal of Polymer Science, ;1997, 15(2): 162-171. shu

ORGANIC PERMSELECTIVE PERVAPORATION CHARACTERISTICS OF POLY(SILYLPROPYNE) AND COPOLYMER DENSE MEMBRANES

Received Date: 1 March 1996

An investigation into the organic permselective separation through poly [1-trimethylsilyl-1-propyne] (PTMSP) and (1-trimethylsily1)-1-(1-penta-methyl-disilyl)-1-propyne copoly-mer (TMSP-PMDSP) dense membranes was made to gain an insight into the effect ofthe chemical structure of membrane materials on pervaporation (PV) characteristics. Theresults show that the copolymer has a higher separation factor αorg/water but with a rela-tively lower value of flux Jt (g/m2·h) than pure PTMSP. This phenomenon may be attributed to the introduction of side chain with large bulk volume in copolymer,which brought about a decrease of excess free volume and the improvement of diffusion selectivity to some extent.With the same molar concentration of organic liquids in feed,THF/water solutions have the highest value of αorg/water as well as Jt in comparison with ethanol/water,iso-propanol/water and THF/water mixtures.
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