멤브레인 (Membrane Journal)

  • 제25권4호
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  • Pages.310-319
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  • 2015
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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Vinyl Benzyl Chloride로 제조된 음이온 교환막의 구조적 고찰 및 전기화학적 특성

Structural Studies in Anion Exchange Membrane Prepared by Vinyl Benzyl Chloride and its Electrochemical Properties

  • 송지혜 (동의대학교 화학공학과) ;
  • 서봉국 (한국화학연구원 그린정밀화학연구센터) ;
  • 최용진 (동의대학교 화학공학과)
  • Song, JeeHye (Department of Chemical Engineering, Dong-Eui University) ;
  • Seo, BongKuk (R&D Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Choi, YongJin (Department of Chemical Engineering, Dong-Eui University)
  • 투고 : 2015.07.24
  • 심사 : 2015.08.11
  • 발행 : 2015.08.31
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초록

음이온 교환막의 치환체 특성을 파악하기 위하여 탄화수소의 분자구조가 다른 세 종류의 음이온 교환기를 vinyl benzyl chloride (VBC) base 막에 도입하였다. 지방족계로 trimethylamine (TMA), 고리형계로 N-methylpiperidine (MP), 방향족계로 pyridine (Py)은 아민화 반응을 통하여 도입되었다. 각각의 반응속도는 막저항(MER)과 이온교환능력(IEC) 변화의 관측으로부터 Py < MP < TMA의 순서로 반응하고 있음을 보여주었다. 한편 SEM image에서는 Py 치환체 막이 가장 균일하고 치밀한 구조를 보여주었으며, 전기화학적 특성에서도 Py이 상용막(AMX)과 비슷한 막저항($5.0{\Omega}{\cdot}cm^2$ >, in 0.5 mol/L NaCl)을 나타내었다. 이 모든 결과로부터 치환체의 공명구조는 균질한 이온교환막의 제조에 기여하고 있음을 알 수 있었다.

Three kinds of anion-exchangeable functional groups with different hydrocarbon molecular structures were introduced to vinyl benzyl chloride-based membrane to understand the effect of attached function in anion-exchange membrane. Trimethylamine (TMA) as an aliphatic fuction, N-methylpiperidine (MP) as an alicyclic fuction and pyridine (Py) as an aromatic function were introduced by amination. The respective reactivity was observed by the trace of membrane resistance( MER)/ion exchange capacity (IEC) and the increasing order of reactivity was Py < MP < TMA. Meanwhile, SEM photograph showed the attached Py ion-exchange membrane was the most homogenous and compact structure in the study. In electrochemical properties, the attached Py ion-exchange membrane showed the MER ($5.0{\Omega}{\cdot}cm^2$ >, in 0.5 mol/L NaCl), comparable to those of commercial membrane (AMX). All results showed that the resonance structure of attached functional group might contribute to the preparation of homogenous anion-exchange membrane.

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