멤브레인 (Membrane Journal)

  • 제24권3호
  • /
  • Pages.240-248
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  • 2014
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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소수성 다공질 PVDF 중공사 분리막 제조 및 막증류 적용

Preparation of Hydrophobic Porous PVDF Membrane and Application for Membrane Distillation

  • 투고 : 2014.05.19
  • 심사 : 2014.06.19
  • 발행 : 2014.06.30
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초록

열유도상분리법(TIPS) 및 연신의 복합공정을 적용하여 막증류(Membrane distillation, MD)용 다공성 PVDF 중공사 분리막을 제조하였다. 분리막의 투과도를 증가시키기 위하여 분리막 투과도를 향상시킬 수 있는 성능인자들 중 분리막의 벽두께를 감소시키고자 하였다. 분리막의 두께를 감소시키기 위하여 분리막 제조 시 토출량을 감소시키고 중공 형성 시 주입하는 bore fluid 주입량을 증대시켰다. 토출량의 감소 및 bore fluid의 증가에 따라 벽두께는 감소하였고, 공기투과도와 수투과도는 크게 증가하였으며, 결과적으로 막증류 공정에 적용 시 투과플럭스도 증가하는 경향을 보여 주었다.

Porous PVDF hollow fiber membranes were prepared by hybrid process of TIPS(thermally induced phase separation) and stretching for membrane distillation. The tests were conducted to investigate that permeability of the membrane could be enhanced by reducing membrane wall thickness. During fiber spinning, dope discharge rate from nozzle was reduced and flow rate of bore fluid increased to make the wall thickness thinner. As dope discharge rate from nozzle was reduced and flow rate of bore fluid increased, the membrane wall thickness was reduced. As a result, air permeability, water permeability and vapor permeability of the membranes increased.

키워드

참고문헌

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