Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The State of Water in Modified Cellulose Membranes

변성 셀룰로오즈 막내의 물의 상태

  • Lee, Soon Hong (Dept. of Materials Sci, Penm State Univ.) ;
  • Lee, Young Moo (Department of Industrial Chemistry, College of Engineering, Hanyang Univ.) ;
  • Kim, Jin Il (Department of Industrial Chemistry, College of Engineering, Hanyang Univ.) ;
  • Kim, Jae Jin (Laboratory of Polymer Membranes, KIST)
  • Received : 1992.10.12
  • Accepted : 1992.11.09
  • Published : 1993.03.01
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Abstract

The state of water in various modified cellulose membranes such as [carboxymethyl cellulose(CMC)-gelatin] polyelectrolyte complex, methylcellulose(MC) grafted with acrylic acid(AA), [(MC-g-AA)-gelatin] polyelectrolyte complex, were determined by differential scanning calorimetric technique. The amounts of freezing(free) and nonfreezing(bound) water were estimated to determine the permeability coefficient of solutes through membranes. The state of water in membranes were influenced by the states of the composition, morphology, and their water content. The difference in diffusive permeability through the water-swollen membranes can be explained by the difference in the free and bound water content.

두 종류의 변성 셀룰로오즈 막내의 물의 상태를 시차열분석계를 이용하여 분석하였다. 셀룰로오즈막들은 카르복시메틸 셀룰로오즈(CMC)-젤라틴 고분자전해질 복합체막과 아크릴산 가교 메틸셀룰로오즈(MC)전해질막이다. 동결수(자유수)와 비동결수(결합수) 양을 측정하여서 막을 통한 용질들의 투과도와의 관계를 조사하였다. 막내의 물의 상태는 막의 조성, 모폴로지, 그리고 수화도의 영향을 받는 것을 알았다. 수화된 막들을 통한 확산 투과도의 차이를 자유수와 결합수의 차이로 설명하였다.

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