Hydrophilic poly( HEMA) and hydrophilic poly(AA) interpenetrating polymer network(IPN) membranes were prepared by sequential polymerization method. The poly(AA) networks were prepared by polymerizing and crosslinking AA in the presence of precrosslinked poly(HEMA) networks of varying T_g and hydrophilicity. Tg was varied by copolymerizing with butyl acrylate(BA), methyl methacrylate( MMA) mixture and the hydrophilicity was contro]]ed by varying the HEMA and BA/MMA ratio. The T_g of the membrane was measured by DSC. The pervaporation of water/ethanol mixture was carried out and the permselectivity was investigated to evaluate the effect of the hydrophilicity and the T_g of the membrane. The swelling ratio and pervaporation rate increased with increasing hydrophilicity but showed no effect of T_g. The separation factor of water (in all ranges of feed concentration, water permeated preferentially through these membranes) increased with T_g. The hydrophilic/hydrophilic IPN membrane was found to enhance the pervaporation rate and mechanical properties.

친수성분인 2-hydroxyethyl methacrylate(HEMA)와 acrylic acid(AA)를 사용하여 T_g와 친수도를 변화시키며 단계중합법으로 IPN막을 제조하였다. T_g와 친수도는 HEMA와 소수성분인 butyl acrylate(BA), methyl methacrylate(MMA)의 비를 조절하며 공중합시켜 변화시켰다. 제조한 막의 T_g는 DSC로 측정하였다. 물/에탄을 혼합액에 대한 투과증발실험을 하여 T_g와 친수도가 선택도와 투과도에 미치는 영향을 조사하였다. 팽윤비와 투과율은 친수도가 증가함에 따라 증가했으나 T_g는 크게 영향을 미치지 않았다. 제조한 막은 모두 물을 선택투과하였고 T_g가 증가하면 선택도도 커졌다. 친수/친수 IPN막을 제조하여 투과율을 높일 수 있었다.

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