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The Membrane Society of Korea (한국막학회)
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The Preparation and Electrochemical Properties of Homogeneous Anion-exchange Composite Membranes Containing Acrylonitrile-butadiene Rubber

Acrylonitrile-butadiene rubber를 포함한 균질계 음이온교환 복합막의 제조 및 전기화학적 특성

  • Song, Pu Reum (Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Mun, Hye Jin (Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Hong, Sung Kwon (Department of Polymer Science & Engineering, Chungnam National University) ;
  • Kim, Jeoung Hoon (Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Chang, Bong Jun (Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 송푸름 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 문혜진 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 홍성권 (충남대학교 고분자공학과) ;
  • 김정훈 (한국화학연구원 그린화학소재연구본부 분리막연구센터) ;
  • 장봉준 (한국화학연구원 그린화학소재연구본부 분리막연구센터)
  • Received : 2014.09.22
  • Accepted : 2014.12.17
  • Published : 2014.12.31
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Abstract

While poly(styrene)-based anion exchange membranes have the advantage like easy and simple manufacturing process, they also possess the disadvantage of poor durability due to their brittleness. Acrylonitrile-butadiene rubber was used here as an additive to make the membranes have improved flexibility and durability. For the preparation of the anion exchange membranes, a PP mesh substrate was immersed into monomer solutions with vinylbenzyl chloride, styrene, divinylbenzene and benzoyl peroxide, then thermally polymerized & crosslinked. The prepared membranes were subsequently post-aminated using trimethylamine to result in $-N+(CH_3)_3$ group-containing composite membranes. Various contents of vinylbenzyl chloride and acrylonitrile-butadiene rubber were investigated to optimize the membrane properties and the prepared membranes were evaluated in terms of water content, ion exchange capacity and electric resistance. It was found that the optimized composite membranes showed higher IEC and lower electric resistance than a commercial anion exchange membrane(AMX) and have excellent flexibility and durability.

폴리스티렌계 음이온교환막은 제조가 쉽고 공정이 간단한 장점을 갖고 있으나 막의 취성이 높아 내구성이 떨어지는 단점을 가지고 있다. 이를 보완하여 유연하고 우수한 내구성을 갖는 막을 만들기 위해 acrylonitrile-butadiene rubber를 첨가제로 사용하여 음이온교환막을 제조하였다. 다양한 조성의 vinylbenzylchloride와 styrene, divinylbenzene, acrylonitrile-butadiene rubber 그리고 benzoyl peroxide로 이루어진 단량체 용액을 지지체인 직물 형태의 지지체인 poly(propylene)위에 캐스팅 후 열중합 가교시킨 다음 trimethylamine과 acetone을 이용하여 음이온 교환기($-N+(CH_3)_3$)를 함유하는 복합막을 제조하였다. 음이온 교환막 제조시 첨가제의 함량에 따른 막의 성능을 평가하여 최적화 비율을 찾고, 단량체의 함량을 변화하여 함수율, 이온교환용량(IEC) 및 전기저항 값을 측정하였다. 그 결과 최적화 비율로 제조된 막들은 아스톰사의 상용화 음이온 교환막(AMX)보다 높은 IEC와 낮은 전기저항 값을 나타내는 동시에 유연성과 내구성이 우수한 막이 만들어진 것을 확인할 수 있었다.

Keywords

References

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