Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Characterization of α-alumina Hollow Fiber Membrane

알루미나 중공사막 제조 및 특성 분석

  • 채진웅 (동국대학교 공과대학 화공생물공학과) ;
  • 이홍주 (동국대학교 공과대학 화공생물공학과) ;
  • 박정훈 (동국대학교 공과대학 화공생물공학과)
  • Received : 2016.05.17
  • Accepted : 2016.06.24
  • Published : 2016.06.30
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Abstract

The alumina hollow fiber membranes were prepared by spinning and sintering a polymer solution containing suspended alumina powders. For determine pore structure of hollow fiber membranes formed by different solvent-nonsolvent interaction rate, dimethylsulfoxide (DMSO), dimethylacetamide (DMAc), triethylphosphite (TEP) were prepared in dope solution by solvent, polyethersulfone (PESf) and polyvinylpyrrolidone (PVP) were used as a polymer binder and additive. The pore structure of hollow fiber membranes was characterized using scanning electron microscope (SEM). The alumina hollow fiber membranes prepared by DMSO, DMAc were had the asymmetric structure mixed sponge-like and finger-like morphology, while TEP solvent were had single sponge-like structure. The prepared hollow fiber membranes were analyzed gas permeation and mechanical strength experiment also. The hollow fiber membrane having single sponge-like structure was had high gas permeation performance. On the contrary to this, more finger-like morphology was less gas permeation performance.

알루미나 분말이 분산된 고분자용액을 비용매 유도 상전이법으로 방사 및 소결하여 알루미나 중공사막을 제조하였다. 용매-비용매의 상호작용 속도에 따른 중공사막 기공 구조 형성을 확인하고, 특성을 분석하기 위해 dimethylsulfoxide (DMSO), dimethylacetamide (DMAc), triethylphosphite (TEP) 용매를 사용하여 방사액을 제조하였으며, 고분자 바인더로는 polyethersulfone (PESf), 첨가제로는 polyvinylpyrrolidone (PVP)를 사용하였다. 알루미나 중공사막의 기공 구조 변화를 확인하기 위해 SEM으로 중공사막 단면을 분석하였다. DMSO, DMAc 용매를 사용할 경우 지상 구조(finger-like structure)와 망상 구조(sponge-like structure)가 복합된 기공 구조가 나타났으며, TEP 용매를 사용할 경우 전체적으로 망상 구조를 가졌다. 기공 구조에 따른 중공사막의 특성을 확인하기 위해 기체투과도, 기공도 및 기계적 강도를 측정하였다. 망상 구조를 갖는 중공사막은 높은 기체 투과특성을 보였으며 지상 구조가 증가할수록 기체투과도가 감소하였다. 반대로 기계적 강도는 지상 구조가 발달할수록 증가하였다.

Keywords

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