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The Membrane Society of Korea (한국막학회)
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Preparation of Porous Polyacrylonitrile Nanofibers Membrane for the MF Application

MF 적용을 위한 다공성 PAN 나노섬유막의 제조

  • Ahn, Hyeonryun (Department of Biosystems & Science and Engineering, Seoul National University) ;
  • Jang, Wongi (Department of Chemical System Engineering, Keimyung University) ;
  • Tak, Taemoon (Department of Biosystems & Science and Engineering, Seoul National University) ;
  • Byun, Hongsik (Department of Chemical System Engineering, Keimyung University)
  • 안혜련 (서울대학교 바이오시스템.소재학과) ;
  • 장원기 (계명대학교 화학시스템공학과) ;
  • 탁태문 (서울대학교 바이오시스템.소재학과) ;
  • 변홍식 (계명대학교 화학시스템공학과)
  • Received : 2012.11.27
  • Accepted : 2013.01.24
  • Published : 2013.04.30
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Abstract

Polyancrylonitrile nanofiber membrane (PAM) was prepared by using the electrospinning method with a solution of polyacrylonitrile (PAN) in DMF. The pore-diameter of PAMs and the number of PAM's layer were controlled for the microfiltration (MF) application. In addition, in order to improve the water-flux, AN-PEGMA copolymers have been synthesized via free radical polymerization with poly (ethylene glycol) methyl ether methacrylate and azobisisobutylronitrile (AIBN), and then PAN/AN-PEGMA nanofiber membranes (PAM/APM) were prepared by electrospinning with a mixture of PAN (9 wt%) and AN-PEGMA (3 wt%) in DMF (88 wt%). The prepared membranes were investigated with FT-IR and E.D.S. It was confirmed through scanning electron microscope (SEM), porometer, and porosity analysis that the porous membrane with a uniform diameter (400~600 nm) and a uniform pore characteristics (0.5~0.4 ${\mu}m$) was prepared. For the MF application, water-flux measurements were investigated and then the result was shown that the water permeability value of PAM/APMs introduced AN-PEGMA copolymers was relatively higher than that of the PVdF commercial membrane. From these results, PAN nanofiber membranes prepared by electrospinning could be utilized as a MF membrane.

Polyacrylonitrile (PAN) 기질고분자를 용매인 dimethylformamide (DMF)에 녹인 후 전기방사법을 이용하여 polyacrylonitrile nanofibers membrane (PAM)을 제조하였으며, 정밀여과(microfiltration) 적용을 위해, 제조된 PAM 샘플들의 layer 수를 변화시켜, 기공크기를 조절하였다. 또한, 순수투과도(water-flux) 향상을 위해 poly (ethylene glycol) methyl ether methacrylate와 azobisisobutylronitrile (AIBN)을 이용하여 자유 라디칼 중합(free radical polymerization)을 통해 합성된 AN-PEGMA 공중합체를 PAN과 3:1의 비율로 혼합한 후 위와 같은 방법으로 다공성 막(PAM/APM)을 제조하였으며, FT-IR과 E.D.S 분석을 통해 PAM 샘플과 비교 분석하였다. Scanning Electron Microscope (SEM) 분석과 기공크기, 기공도 실험을 통해 균일한 직경(400~600 nm)과 균일한 기공특성(0.5~0.4 ${\mu}m$)을 가진 다공성 막이 제조되었음을 확인할 수 있었다. 순수투과도 측정을 통해 정밀여과용 막으로의 활용가능성을 조사하였으며, AN-PEGMA 공중합체가 도입된 PAM/APM의 경우 상용막인 polyvinylidenefluoride (PVdF)에 비해 순수투과도가 상대적으로 높은 값을 나타내었다. 위의 결과로부터 전기방사법으로 제조된 PAN 나노섬유막들은 정밀여과용 막으로서 충분한 활용가능성이 있다고 판단된다.

Keywords

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