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

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.

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