Blend membranes of poly(vinyl alcohol) and k-carrageenan were prepared by solution blending. Their pervaporation characteristics for 90wt% aqueous ethanol solution were investigated in terms of blend ration and operating temperature. The blend behavior of these membranes exhibits homogeneous morphology unrelated to blend ratio, and the results were analyzed by using SEM and X-ray diffractometer. The swelling phenomenon of the prepared membranes decreased with increasing of k-carrageenan content because of its rigid properties. For the pervaporation characteristics, the permeation fluxes of the overall blend membranes were smaller than pure membranes but the separation factor was higher. Especially, in the case of 50/50 blend ratio the permeation flux showed a value, and the maximum separation factor appeared at the 25/75 blend ratio. As a result of this, it can be considered that these membranes have a more compact network structure. In the pervaporation process, with an increase in operating temperature, theoverall permeation fluxes increased significantly but the separation factors decreased, respectively. The results were explained in term of the plasticizing effect of water on the membrane. However, in the case of 25/75 blend ratio the pervaporation performance at 60℃ was better than that of pure membranes at 30℃. This result indicates that it is possible to prepared high performance blend membranes by controlling blend ratio and operating condition.

흡착 평형식은 크로마토그래피공정에 관계되는 가장 기본자료이다. Phenol과 o-cresol의 흡착 평형식을 구하기 위해서 RP-HPLC(reversed-phase high performance liquid chromatography) 환경에서 정적 방법을 이용하였다. Phenol과 o-cresol을 초기에 각각 1, 5, 10, 20, 50, 100, 150, 200mg/ml 의 다른 농도를 실험하여 평형에 도달한 후 이동상과 고정상에서의 시료의 농도를 측정하였다. 측정된 데이터를 Freundlich, Langmuir, Sips 그리고 Ranke-Prausnitz식에 적용시켜 보았다. 실험된 데이터는 회귀분석을 통해 fitting 시켰다. Freundlich 식을 제외한 나머지 식은 실험값과 매우 흡사한 결과를 나타내었다.