Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Hollow Fiber Nano-composite Membrane Preparation onto the Porous PVDF Membrane Surfaces using the Interfacial Polymerization

다공성 PVDF 막의 polyamide 계면중합법처리를 통한 나노 중공사 복합막 제조 연구

  • 강수연 (한남대학교 대덕밸리캠퍼스 화학공학과) ;
  • 조은혜 (한남대학교 대덕밸리캠퍼스 화학공학과) ;
  • 김일형 (한남대학교 대덕밸리캠퍼스 화학공학과) ;
  • 김정식 ((주) 테크윈) ;
  • 임지원 (한남대학교 대덕밸리캠퍼스 화학공학과)
  • Received : 2014.03.02
  • Accepted : 2014.04.24
  • Published : 2014.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

The composite membranes were prepared on the surface of hydrophobic porous poly (vinylidene fluoride) (PVDF) hollow fiber membranes through the interfacial polymerization. The preparation variables were the concentrations of piperazine (PIP), trimesoyl chloride (TMC) and the contents of polyethylene glyco l (PEG). The separation characterization of the resulting membranes were carried out for aqueous 100 ppm solution of NaCl, $CaSO_4$, and $MgCl_2$ and also mixed 300 ppm solution of NaCl and $CaSO_4$ in terms of the flux and rejection. Both the flux and rejection were the highest when the interfacial polymerization was conducted using TMC. When TMC concentration was 0.1 wt%, the flux and rejection were shown 48.3 LMH ($L/m^2{\cdot}hr$) and 59%, respectively. To improve the flux, the annealing post-treatment and the addition of PEG into piperazine were done. As expected, the overall flux was enhanced while the rejection was reduced.

Poly (vinylidene fluoride) (PVDF)의 소수성 중공사막 표면에 계면중합하여 복합막을 제조하였다. Piperazine (PIP)과 trimesoyl chloride (TMC)의 농도변화, polyethylene glycol (PEG)의 함량변화에 따라 막을 제조하였으며, 막의 특성 평가를 위해 100 ppm의 NaCl, $CaSO_4$, $MgCl_2$ 용액과 NaCl과 $CaSO_4$를 혼합하여 제조한 300 ppm의 공급액에 대한 막의 투과도와 배제율을 알아보고자 하였다. TMC를 사용하여 계면중합하였을 때 막의 투과도와 배제율이 가장 높게 나타났으며, 0.1~1 wt%로 TMC 농도를 변화시켜 가며 실험을 수행한 결과 0.1 wt%일 때 NaCl 100 ppm에 대해 투과도 48.3 LMH ($L/m^2{\cdot}hr$)와 배제율 59%로 가장 높은 값을 나타내었다. 또한, 투과도를 향상시키기 위해 annealing처리와 piperazine에 PEG를 첨가하여 실험을 수행하였다. 실험결과 처리하지 않은 막에 비해 투과도는 전체적으로 향상되는 모습을 나타냈지만 배제율이 감소하는 경향을 나타내었다.

Keywords

References

  1. T. MAtsuura, "Progress in membrane science and technology for seawater desalination-review", Desalination 134, 47 (2001). https://doi.org/10.1016/S0011-9164(01)00114-X
  2. M. M. Kim and J. W. Park, "A Study on Reverse Osmosis Composite Membrane with polysulfone supporting membrane", Membrane Journal, 4(1), 38 (1994).
  3. J. W. Park and H. J. Kim, "Manufacture of the Thin-Film Composite Membranes for the Reverse Osmosis Process using Interfacial Polymerization Technique", Membrane Journal, 8(1), 29 (1998).
  4. R. J. Peterson, "Composite Reverse Osmosis and Nanofiltration membrane", J. Membr. Sci., 83, 81 (1993). https://doi.org/10.1016/0376-7388(93)80014-O
  5. P. W. Morgan, "Condensation Polymer: By Interfacial and Solution Methods", p. 19, Interscience Publishers, New York, NY (1965).
  6. P. H. Carnell and H. G. Cassidy, "The Preparation of Membranes", J. Membr. Sci., 55, 233 (1961).
  7. Xiaochen Fana and Yanan Dong, "Improved Performance of Composite Nanofiltration Membranes by Adding Calcium Chloride in Aqueous Phase During Interfacial Polymerization Process", J. Membr. Sci., 452, 90 (2014). https://doi.org/10.1016/j.memsci.2013.10.026
  8. J. W. Park and B. B. Jin, "Reaction Mechanism and Thickness of Thin Film in Interfacial Polymerization", Hwahak Konghak, 36, 393 (1998).
  9. Xiao Wang and Tsung-Ming Yeh, "Nanofiltration Membranes Prepared by Interfacial Polymerization on Thin-Film Nanofiltration Composite Scaffold", Polym. Sci, Available online 12 (2013).
  10. M. Kurihara, T. Uemura, Y. Himeshima, K. Ueno, and R. Bairinji, "Development of Cross-linked Aromatic Polyamide Composite Reverse Osmosis Membrane", J. Chem. Sci. Jpn., 2, 97 (1994).
  11. S. N. Gaeta, E. Petrocchi, E. Negri, and E. Drioli, "Chlorine Resistant of Polypiperazine Amide Membranes and Modules", Desalination, 83, 1 (1991).
  12. R. Singo and Rajinder, "Polyamide Polymer Solution Behavior under Chlorination Conditions", J. Membr. Sci., 88, 285 (1994). https://doi.org/10.1016/0376-7388(94)87015-2
  13. Y. J. Choi and S. W. Lee, "Hydrophilic Modification of Porous Polyvinylidene Fluoride Membrane by Pre-irradiating Electron Beam", Membrane Journal, 21(2), 118 (2011).
  14. Haiyuan and Jianfen Zheng, "Role of Wettability in Interfacial Polymerization Based on PVDF Electrospun Nanofilbrous Scaffolds", J. Mem. Sci, 422, 124 (2013).
  15. Shubhangi G Gholap and Manohar V Badiger, "Molecular Origins of Wettability of Hydrophobic Poly (vinylidene fluoride) Microporous Membranes on Poly (vinyl alcohol) Adsorption : Surface and Interface Analysis by XPS", J. Phys. Chem. B, 19, 13942 (2005).