Article
  • Studies on the Polymeric Membrane for Separation: 2. The Characteristics of Cellulose Acetate Membranes Prepared from Quarternary Casting System
  • Tak TM, Hwang JR, Kim JH
  • 고분자 분리막에 관한 연구: 2. 사성분계로 제조된 셀룰로오스 아세테이트 막의 특성
  • 탁태문, 황정림, 김종호
Abstract
Flat-sheet cellulose acetate(CA) membranes were prepared from CA-acetone-DMF-pore forming agents quarternary system by the combined evaporation-diffusion technique. Studies about the effects of the membrane preparation parameters such as the addition of pore forming agent(formamide or LiNO3), the composition ratio of acetone-DMF solvent system, and the solvent evaporation period were carried out on the membrane performance and structure. A membrane prepared with a pore forming agent exhibited a higher pure water flux than that without it. Acetone content in solvent system affected significantly the top surface skin formation and subsequently the membrane establishment with optimum performance. Membrane structure appeared diversely depending on the acetone-DMF composition ratio. Over the range of solvent evaporation periods investigated, pure water flux was initially decreased and then increased afterwards with the increasing period. On the other hand, solute rejection results showed opposite trends.

CA-acetone-DMF-pore 형성제의 사성분계 제막용액으로부터 평판형 막을 제조하였다. 막 제조과정에서 pore 형성제의 도입, acetone-DMF 용매계의 조성비 변화, 용매증발시간 등 몇가지 막제조변수들의 영향이 검토되었다. pore 형성제를 도입하여 제조된 막은 대체로 물질투과성능(pure water flux)이 증진되었다. 용매계에서 acetone 함량은 막의 상부 표면층의 형성과 그에 따른 적정 성능을 갖는 막 제조 설계에 중요하게 작용하였다. 막의구조는 용매계에서 acetone : DMF 조성비에 따라 크게 변하였다. 주어진 용매증발시간의 범위 내에서 pure water flux는 초기에는 감소하다가 증발시간이 길어짐에 따라 증가한 반면, 용질배제성능은 이와 반대의 결과로 나타났다.

References
  • 1. Breton EJ, Reid CE, J. Appl. Polym. Sci., 1, 133 (1959)
  •  
  • 2. Loeb S, Sourirajan SDepartment of Engineering, UCLA, Report No. 60-60 (1961)
  •  
  • 3. Reiley RL, Merten S, Gardner JO, Desalination, 1, 30 (1966)
  •  
  • 4. Kesting RESynthetic Polymeric Membranes, McGraw-Hill, New York (1971)
  •  
  • 5. Strathmann H, Kock K, Amar P, Baker RW, Desalination, 16, 179 (1975)
  •  
  • 6. Frommer MA, Lancet DReverse Osmosis Membrane Research, Plenum Press, New York (1972)
  •  
  • 7. Tak TM, Hwang JR, Min BR, Polym.(Korea), 13(4), 316 (1989)
  •  
  • 8. Kesting RE, J. Appl. Polym. Sci., 9, 663 (1965)
  •  
  • 9. Kunst B, Sourirajan S, J. Appl. Polym. Sci., 14, 723 (1970)
  •  
  • 10. Kesting RESynthetic Polymeric Membranes (2nd ed.), McGraw-Hill, New York (1985)
  •  
  • 11. Manefee A, Kesting RE, Kolloid Z. Z. Polym., 230, 341 (1969)
  •  
  • 12. Frommer MA, Messalem RM, Ind. Eng. Chem. Prod. Res. Dev., 12, 328 (1973)
  •  
  • 13. Merten UDesalination by Reverse Osmosis, M.I.T. Press (1966)
  •  
  • 14. Pusch W, Walch A, Angew. Chem.-Int. Edit., 21, 660 (1982)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1991; 15(1): 40-48

    Published online Feb 25, 1991