멤브레인 (Membrane Journal)

  • 제31권6호
  • /
  • Pages.434-442
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  • 2021
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  • 1226-0088(pISSN)
  • /
  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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𝛽-사이클로덱스트린을 함침시킨 PVDF 혼합기질 비대칭막의 제조와 내오염성 평가

Preparation and Anti-fouling Properties of PVDF Mixed Matrix Asymmetric Membranes Impregnated with 𝛽-cyclodextrin

  • 신성주 (충북대학교 공과대학 공업화학과) ;
  • 이종성 (본제이워터스(주) 기술연구소) ;
  • 이정길 (본제이워터스(주) 기술연구소) ;
  • 염경호 (충북대학교 공과대학 공업화학과)
  • Shin, Sung Ju (Department of Engineering Chemistry, Chungbuk National University) ;
  • Lee, Jong Sung (Institute of Technology, Bonjwaters Co.) ;
  • Lee, Jeong Gil (Institute of Technology, Bonjwaters Co.) ;
  • Youm, Kyung Ho (Department of Engineering Chemistry, Chungbuk National University)
  • 투고 : 2021.12.19
  • 심사 : 2021.12.26
  • 발행 : 2021.12.31
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초록

Poly(vinylidene fluoride) (PVDF) 막은 내구성 및 열적·화학적 안정성 등의 물성은 우수하나 소수성이 커서 수투과도가 낮고 단백질 및 유기물에 의한 막오염이 쉽게 발생한다. 본 연구에서는 PVDF 막의 내오염성을 개선시키고자 바이오 기능성 물질인 𝛽-cyclodextrin (𝛽-CD)을 PVDF 막 구조 내에 분산 함침시킨 PVDF/𝛽-CD 혼합기질 비대칭막을 상변환법을 통해 제조하고, 𝛽-CD 함침량에 따른 순수 투과 유속(PWF) 측정과 BSA 용액을 대상으로 한 막여과 실험을 수행하여 내오염성 특성을 평가하였다. 이 결과 PVDF 고분자 매질 내에 𝛽-CD를 함침시키면 막의 친수성을 증가시켜 접촉각을 감소시키고 이로 인해 내오염성을 향상시킬 수 있었다. 𝛽-CD 함침량이 2 wt%인 도프용액을 사용하여 제조된 PVDF/𝛽-CD 혼합기질 비대칭막의 PWF는 64 L/m2·h, BSA 배제도는 95%를 나타내었으며, 𝛽-CD를 첨가하지 않고 제조된 pristine PVDF 막에 비해 투과 유속 향상성이 최대 80%에 달해 𝛽-CD를 첨가시킴으로서 PVDF 막의 내오염성을 증가시킬 수 있었다.

Poly(vinylidene fluoride) (PVDF) membrane has a good membrane durability because of its high mechanical resistance, thermal and chemical stability. However, the strong hydrophobic property of PVDF membrane can induce a low water permeability and easy fouling by proteins and organic matters. In order to improve the anti-fouling properties of PVDF membrane, the PVDF mixed matrix asymmetric membranes impregnated with biofunctional material 𝛽-cyclodextrin (𝛽-CD) in the membrane structure were prepared by phase inversion method. The membrane filtration experiments of pure water and BSA solution were performed using the PVDF/𝛽-CD mixed matrix asymmetric membranes prepared according to the 𝛽-CD contents. The experiments showed that the introduction of 𝛽-CD into the PVDF polymer matrix contributed to increase in the hydrophilic property of the PVDF membranes, and this led to the reduction of contact angles and improvement of anti-fouling properties. The PVDF/𝛽-CD membrane which was prepared using the dope solution with a 2 wt% 𝛽-CD content represented 64 L/m2·h of pure water flux, 95% of BSA rejection and maximum 80% of flux enhancements compared to flux results of the pristine PVDF membrane.

키워드

과제정보

본 논문은 2020년도 교육부와 한국연구재단의 재원으로 지원을 받아 수행된 사회맞춤형 산학협력 선도대학(LINC+) 육성사업의 연구결과입니다.

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