Article
  • The Permeation Characteristics of Polyester Membrane
  • Kim KY, Lee KH
  • Polyester 막의 투과특성
  • 김계용, 이규현
Abstract
Permeation characteristics of the membranes of poly(ethylene) terephthaltae(PET) and of the bleeds of PET with poly (diethylene g1ycol) terephthalate P(DEG)T were investigated under different permeation conditions. The membranes were prepared by different methods and their effects were also investigated. The changes in membrane structure due to different heat treatment procedures were studied by infrared spectroscopy. The concentration of casting solution was adjusted to 15%. A mixture of 40wt% tetrach loroethane(TEC) and 60wt% phenol was used as a solvent. The experimental results can be summerized as follows: 1) As the content of P(DEG) T in the blends and tile evaporation temperature of solvent increased, the permeation rate increased, but rejection efficiency reased. 2) As the heat treatment temlierature increased, the crystallization degree increased, consequently, the permeation rate decreased. 3) The membranes showed the best characteristics when prepared with PET-P(DEG) T(70:30) blending ratio, solvent evaporation temperature 100℃ and operating pressure 700psi.

Polyethylene terephthalate 막과 Polyethylene terephthalate-poly(diethylene glycol) terephthalate 혼성막의 투과성을 제막조건과 투과조건을 변화시켜 검토하였다. 열처리에 의한 막의 구조변화는 적외선 분광광도계를 사용하여 검토하였다. Cast 액중의 중합체 농도는 15%로 일정하게 하고 polyethylene terephthalate와 Poly(dishylene glycol) terephthalate의 혼성비를 변화시켜 제막하였다. Cast용매는 TCE-phenol(40:60 wt%) 혼합용매를 사용하였다. 실험결과, P(DEG)T의 함량 및 용매증발온도가 증가할수록 용매의 투과속도는 증가하지만 용매의 배제율은 감소하였다. 또 조작압력이 높을수록 용매의 투과속도는 증가하지만 일전시간 경화 후에는 압밀화에 의해 감소하였다. 열처리에 의해 결정화도가 증가할수록 용매의 투과속도는 감소하며 용질의 배제율은 증가하였다. 이같은 사실에서 PET와 P(DEG)T로 제막한 혼성막에서 P(DEG)T의 함량은 30% 용매증발온도는 100℃, 조작압력은 700psi인 때가 가장 좋은 용질분리효과 를 가져왔다.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1980; 4(2): 152-161

    Published online Mar 25, 1980

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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