Pervaporation of Ternary Aqueous Alcohol Solutions through Poly(dimethyl siloxane) Membrane

Poly(dimethyl siloxane)막에 의한 삼성분 알코올수용액의 투과증발

  • 김상집 (전남대학교 공과대학 화학공학과) ;
  • 김진환 (전남대학교 공과대학 화학공학과)
  • Received : 1996.07.02
  • Accepted : 1996.11.14
  • Published : 1996.12.10


Pervaporation experiments of ternary ethanol/isopropanol/water mixtures were performed using poly(dimethyl siloxane)(PDMS) membrane at $45^{\circ}C$ and the mutual effects of ethanol and isopropanol on the permeation characteristics were studied. Compared to the case of the binary aqueous ethanol or isopropanol solutions, the existence of ethanol or isopropanol in the ternary mixtures resulted in the depression of each other's permeation rate. The depression effect of ethanol on the isopropanol permeation was more considerable than the depression effect of isopropanol on the ethanol permeation. These decreases in the permeation rate were thought to be due to the larger interactions between permeants than the plasticizing effects of ethanol or isopropanol on the polymer membrane. The strong interactions between permeants reduced the driving forces for both ethanol and isopropanol permeation in the ternary mixtures.



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