Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Properties of Chlorine-Resistance Loose Reverse Osmosis Hollow-fiber Membrane

내염소성 중공사형 역삼투막(Loose RO)의 제조 및 특성

  • Kim, Se-Jong (School of Nano and Advanced Materials Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University) ;
  • Woo, Seung-Moon (School of Nano and Advanced Materials Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University) ;
  • Hwang, Hae-Yong (School of Nano and Advanced Materials Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University) ;
  • Koh, Hyung-Chul (Airrane Co. Ltd) ;
  • Ha, Seong-Yong (Airrane Co. Ltd) ;
  • Choi, Ho-Sang (Dept. of Chemical Engineering, Kyungil University) ;
  • Nam, Sang-Yong (School of Nano and Advanced Materials Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University)
  • 김세종 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 우승문 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 황해영 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 고형철 ((주)에어레인) ;
  • 하성용 ((주)에어레인) ;
  • 최호상 (경일대학교 화학공학과) ;
  • 남상용 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단)
  • Received : 2010.12.09
  • Accepted : 2010.12.20
  • Published : 2010.12.30
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Abstract

In this study, loose RO hollow fiber membranes using CTA polymer were prepared by phase inversion method and their water purification properties were tested. 1,4-dioxane and LiCl was used as a skin layer formation agent and pore formation agent, respectively. Water flux, salt rejection, chlorine resistance, MWCO and membrane morphology were evaluated as a function of the dope composition. When the membrane prepared using the dope solution of CTA/NMP/1,4-dioxane = 18/72/10 (wt%) with air gap of 30 cm, it shows improved RO performance such as $20.5L/m^2hr$ of water flux, 60% of NaCl rejection, 10,000 ppm/hr of chlorine-resistance and around 5,000 Da of MWCO.

본 연구에서는 셀룰로오스 트리아세테이트(CTA)를 사용한 loose RO 중공사 막이 상전환 법으로 제조되었고 이들의 수처리 특성이 평가되었다. 1,4-dioxane과 리튬클로라이드(LiCl)는 각각 스킨층 형성제와 기공 형성제로 사용되었다. 제조된 CTA 중공사막의 특성을 알아보기 위하여 전자주사현미경을 통하여 모폴로지를 관찰하였고, 수투과도 및 염 제거율, 내염소성 테스트, 그리고 분획분자량을 측정하였다. CTA/NMP/1,4-dioxane = 18/72/10 (wt%) 에어갭 30 cm의 중공사 분리막의 경우 $20.5L/m^2hr$의 수투과도와 60%의 염 제거율, NaOCl 10,000 ppm/hr의 내염소성 및 약 5,000 Da값의 MWCO를 나타내는 우수한 특성의 loose RO 막이 제조되었다.

Keywords

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