한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제38권3호
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  • Pages.143-149
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  • 2022
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
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막증류 담수화를 위한 친수성/소수성 이중 표면 코팅

Hydrophilic/Hydrophobic Dual Surface Coatings for Membrane Distillation Desalination

  • 김혜원 (한국과학기술연구원 물자원순환연구단) ;
  • 이승헌 (한국과학기술연구원 물자원순환연구단) ;
  • 정성필 (과학기술연합대학원대학교 에너지-환경.융합) ;
  • 변지혜 (과학기술연합대학원대학교 에너지-환경.융합)
  • Kim, Hye-Won (Water Cycle Research Center, Korea Institute of Science and Technology) ;
  • Lee, Seungheon (Water Cycle Research Center, Korea Institute of Science and Technology) ;
  • Jeong, Seongpil (Division of Energy and Environment Technology, University of Science and Technology) ;
  • Byun, Jeehye (Division of Energy and Environment Technology, University of Science and Technology)
  • 투고 : 2022.05.09
  • 심사 : 2022.05.30
  • 발행 : 2022.05.30
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초록

Membrane distillation (MD) has emerged as a sustainable desalination technology to solve the water and energy problems faced by the modern society. In particular, the surface wetting properties of the membrane have been recognized as a key parameter to determine the performance of the MD system. In this study, a novel surface modification technique was developed to induce a Janus-type hydrophilic/hydrophobic layer on the membrane surface. The hydrophilic layer was created on a porous PVDF membrane by vapor phase polymerization of the pyrrole monomer, forming a thin coating of polypyrrole on the membrane walls. A rigid polymeric coating layer was created without compromising the membrane porosity. The hydrophilic coating was then followed by the in-situ growth of siloxane nanoparticles, where the condensation of organosilane provided quick loading of hydrophobic layers on the membrane surface. The composite layers of dual coatings allowed systematic control of the surface wettability of porous membranes. By the virtue of the photothermal property of the hydrophilic polypyrrole layer, the desalination performance of the coated membrane was tested in a solar MD system. The wetting properties of the dual-layer were further evaluated in a direct-contact MD module, exploring the potential of the Janus membrane structure for effective and low-energy desalination.

키워드

과제정보

본 연구는 한국연구재단의 지원을 받아 수행되었습니다(No. 2021R1C1C1005774).

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