멤브레인 (Membrane Journal)

  • 제28권3호
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  • Pages.180-186
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  • 2018
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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DOI QR코드

DOI QR Code

중공사형 나노복합막 제조를 이용한 수용액으로부터 저분자량의 염료 분리 연구

Separation of Low Molecular Weight of Dye from Aqueous Solution Using the Prepared Nano-composite Hollow Fiber Membranes

  • 박철오 (한남대학교 화공신소재공학과) ;
  • 이성재 (한남대학교 화공신소재공학과) ;
  • 임지원 (한남대학교 화공신소재공학과)
  • Park, Cheol Oh (Department of Advanced Materials and Chemical Engineering, Hannam University) ;
  • Lee, Sung Jae (Department of Advanced Materials and Chemical Engineering, Hannam University) ;
  • Rhim, Ji Won (Department of Advanced Materials and Chemical Engineering, Hannam University)
  • 투고 : 2018.06.20
  • 심사 : 2018.06.29
  • 발행 : 2018.06.30
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초록

Polyvinylidene fluoride (PVDF)의 중공사막 표면에 2번 딥코팅하여 layer-by-layer 방식으로 나노복합막을 제조하였다. 1차 코팅에서 poly(vinylsulfonic acid)(PVSA)와 Poly(styrene sulfonic acid)(PSSA)의 농도, 이온세기(Ionic strength, IS) 등을 변화시키며 막을 제조하였으며, 2차 코팅 용액으로는 Poly(ethyleneimine) 10,000 ppm I.S = 0.3으로 고정하였다. 막의 특성평가를 위해 각각의 100 ppm NaCl, $CaSO_4$, $MgCl_2$, 그리고 25 ppm Methyl Orange (MO) 공급액에 대한 막의 투과도와 염배제율을 측정하였다. 코팅용액의 코팅 물질의 농도가 올라갈수록 염배제율이 상승하였으며, 본 실험 조건에서 PVSA보다는 PSSA를 이용하여 제조한 중공사막이 염배제율이 높은 것을 확인하였다. 대표적으로 PSSA 30,000 ppm I.S = 1.0에서 중 공사막을 제조하였을 때 25 ppm MO용액의 투과도 1.848 LMH, 염배제율 76.3%로 가장 높은 값을 나타내었다.

The nano-composite membranes were prepared onto the polyvinylidene fluoride (PVDF) hollow fiber membranes through twice dip-coating known layer-by-layer method. For the first coating, poly(vinylsulfonic acid, sodium salt)(PVSA) and Poly(styrene sulfonic acid)(PSSA) were used with varying the concentration and ionic strength (IS) and the poly(ethyleneimine)(PEI) as the second coating material was fixed at 10,000 ppm and IS = 0.3. To characterize the prepared nano-composite membranes, the permeabilities and rejection ratio were measured for each 100 ppm NaCl, $CaSO_4$, $MgCl_2$, and 25 ppm MO aqueous solution. The rejections were increased as the concentrations of coating materials increased. And it was confirmed that the salt rejections for PSSA as the coating material were higher than for PVSA. Typically, the permeability, 1.848 LMH and the rejection for MO 76.3% were obtained at the coating conditions of PSSA 30,000 ppm and I.S = 1.0.

키워드

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