Preparation of Anion-exchange Membrane for Selective Separation of Urea and Ion

요소(Urea) 및 이온의 선택적 분리를 위한 음이온교환막의 제조

  • Kim, Byoung-Sik (Department of Chemical & Biochemical Engineering, Dongguk University) ;
  • Kim, Min (Department of Safety & Environmental System Engineering, Dongguk University) ;
  • Heo, Kwang-Beom (Department of Chemical & Biochemical Engineering, Dongguk University) ;
  • Hong, Joo-Hee (Department of Chemical & Biochemical Engineering, Dongguk University) ;
  • Na, Won-Jae (Department of Safety & Environmental System Engineering, Dongguk University) ;
  • Kim, Jae-Hun (Department of Safety & Environmental System Engineering, Dongguk University)
  • 김병식 (동국대학교 생명.화학공학과) ;
  • 김민 (동국대학교 안전환경시스템공학과) ;
  • 허광범 (동국대학교 생명.화학공학과) ;
  • 홍주희 (동국대학교 생명.화학공학과) ;
  • 나원재 (동국대학교 안전환경시스템공학과) ;
  • 김재훈 (동국대학교 안전환경시스템공학과)
  • Received : 2006.04.04
  • Accepted : 2006.05.17
  • Published : 2006.06.10

Abstract

In this study, functional anion-exchange membranes have been prepared and characterized to improve the permeation fluxes of the anion and urea for peritoneum dialysis. They were prepared by UV and radiation graft polymerization methods. The separation-membrane prepared by UV graft polymerization showed the highest grafting degree when HEMA and VBTAC were mixed by 1:2 ratio. However, the grafting degree decreased slightly at compositions above the 1:2 ratio because of the disruption of UV penetration caused by build-up of homopolymer. In the case of photo-initiator, the grafting degree increased up to 0.2 wt%, above which it decreased to a small extent. For the two membranes prepared by radiation graft polymerization, the VBTAC/HEMA membrane showed 96% grafting degree for 6 h reaction time and the GMA membrane showed over 100% grafting degree for 2 h reaction time. Anion-exchange membranes were prepared with 113% grafting degree and with DEA and TEA exchange groups. The DEA membrane showed the conversion degree of 70% in 4 h reaction time while the TEA membrane showed 30% in 2 h reaction time. The prepared anion-exchange membranes were permeable to only anions and urea, but not cations.

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