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Poly(vinyl alcohol) (PVA)/sulfosuccinic acid (SSA)-H+ 막은 1가 이온 Li+, Na+,K + 2가 이온 Mg2+, Ca2+,Ba2+, 3가 이온 Al3+로 치환하였다. 또한 Li+의 경우 치환도를 화하였다. 금속이온치환의 효과를 알아보기 위하여 Diffusion cell을 이용한 메탄올투과도를 측정하였다. 메탄올투과도를 1가 이온의 경우는 'Salting-out'효과뿐 아니라 electrostatic 가교와 금속 이온의 반응성에 의존한다고 사료되었다. 또한 Li+이온이 경우 치환도에 비례하여 메탄올 투과도가 감소하였는데 이는 'Salting-out'효과에 기인한다고 사료되어진다.
The hydrogen ions in poly (vinyl alcohol) (PVA)/sulfosuccinic acid (SSA) membranes substiuted with Li+, Na+, and K+/ of monvoalent metal ions, Mg2+, Ca2+ and Ba2+ of divalent metal ions, and Al3+ of trivalent metal ion. In addition, Li+ ions were exchanged with varing reaction time. The effects of metal ions exchanged were investigated in terms of methanol permeability -uling diffusion cell. The methanol permeabilies decreased in the sequence of Na+, Li+ and K+ and this might be due to the 'Salting-out' effect while the methanol permeabilities for divalent and trivalent ion-substituted membranes were affected by the combined effects of salting-out, eletrostatic crosslinking and extent of metal ion substiution. As for Li+ ions, methanol permeabilities of PVA/SSA membranes decreased in proportion to the degrees of subsituted Li+ ions.
