Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Characterization of Ceramic Membranes by Gas-Liquid Displacement Porometer and Liquid-Liquid Displacement Porometer

Gas-Liquid Displacement Porometer와 Liquid-Liquid Displacement Porometer를 이용한 세라믹 분리막 특성 분석

  • Kim, Yeo-Jin (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kim, Seong-Joong (University of Science & Technology (UST)) ;
  • Kim, Jeong (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Jo, Yeong-Hoon (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Park, Hosik (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Lee, Pyung-Soo (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Park, You-In (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Park, Ho-Bum (Department of Energy Engineering, Hanyang University) ;
  • Nam, Seung-Eun (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
  • 김여진 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 김성중 (과학기술연합대학원대학교) ;
  • 김정 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 조영훈 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 박호식 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 이평수 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 박유인 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 박호범 (한양대학교 에너지공학과) ;
  • 남승은 (한국화학연구원 그린화학소재연구본부 분리막연구센터)
  • Received : 2017.06.23
  • Accepted : 2017.06.28
  • Published : 2017.06.30
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Abstract

There are several different methods to characterize membrane pore size distribution, however, it is yet difficult to accurately measure pore size range of 10-50 nm. In this work, we employed gas-liquid displacement porometer (GLDP) and liquid-liquid displacement porometer (LLDP) to characterize in-house alumina hollow fiber membrane (K-100) and commercial membranes (A-100, A-20) that exhibit pore sizes between 10-100 nm. GLDP method was more suitable for measuring the maximum pore size, and the measured mean pore size of the membranes by LLDP were better correlated with water permeability and solute rejection. It was determined that LLDP is effective for measuring pore sizes between 10-50 nm; however, the method holds intrinsic disadvantages such as low precision and high sensitivity compared to that of GLDP. Nevertheless, it is expected that the recently commercialized LLDP technique can provide useful data that other methods cannot.

분리막의 기공 크기 및 분포도를 분석하기 위한 다양한 측정법이 있지만 10-50 nm 범위의 한외여과막 기공크기를 정확하게 측정하기가 까다롭다. 따라서 gas-liquid displacement porometer (GLDP)와 liquid-liquid displacement porometer(LLDP) 기공 특성 측정법 두 가지를 이용하여, 10-100 nm의 기공크기를 갖는 세 종류의 세라믹 분리막(K-100, A-100, A-20)의 기공 크기 및 분포도를 비교 분석하였다. GLDP는 한외여과막의 최대 기공크기를 측정하는데 적합한 분석법으로 확인되었고, LLDP로 측정된 평균 기공크기가 분리막의 분리 성능 결과와 더 연계되어 있었다. 또한 LLDP는 10-50 nm 범위의 기공크기를 측정하는데 적합한 기공 분석법으로 확인되었으나, GLDP 보다 낮은 정밀도와 높은 민감도를 나타내었다. 다양한 기공 특성 분석법 가운데, 최근 상용화된 LLDP 기술은 종래의 측정법으로 알지 못했던 유용한 결과들을 제공할 수 있을 것으로 기대된다.

Keywords

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