화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.40, No.5, 714-721, September, 2016
DOI10.7317/pk.2016.40.5.714  Export Citation
Poly(4-vinyl pyridine)(PVPy)과 Poly(1-vinyl imidazole)(PVIm) 4차염의 전기방사에 의한 음이온교환막의 제조 및 특성
Fabrication and Characterization of Anion Exchange Membranes from the Electrospun Quaternized Salts of Poly(4-vinyl pyridine)(PVPy) and Poly(1-vinyl imidazole)(PVIm)
이석현, 김정수1, †
  • 충남대학교 에너지과학기술대학원
  • 1충남대학교 고분자공학과
Seok Hyeon Lee, and Jeong Soo Kim1, †
  • Graduate School of Energy Sci. & Tech., Chungnam National Univ., 99 Daehack-Ro, Daejeon 34134, Korea
  • 1Dept. of Polymer Sci. & Eng., Chungnam National Univ., 99 Daehack-Ro, Daejeon 34134, Korea
E-mail:
초록
본 연구에서는 전기방사에 의한 나노섬유 음이온교환막을 제조하기 위해 poly(4-vinyl pyridine)(PVPy)과 poly(1-vinyl imidazole)(PVIm)에 각각 allyl bromide와 butyl bromide를 이용한 반응을 진행하여 네 종류의 이온교환 고분자 4차염을 제조하였다. 이 염들을 각각 서로 다른 비율로 poly(vinylidene fluoride-co-hexafluoropropylene)(PVdFHFP)와 함께 DMF에 용해시켰다. 이 고분자 혼합물을 전기방사법에 의해서 전압, 실린지 팁과 콜렉터 사이의 거리, 용액의 유량 등 방사조건을 달리하여 나노섬유 매트(mat)를 만들었고, 이어서 hot pressor를 사용하여 융착된 조밀한 전기방사 나노섬유 음이온교환막을 제조하였다. ATR-IR, 1H NMR, SEM을 이용하여 구조확인을 하였으며, TGA를 통해 열 분석을 실시하였다. 음이온교환막의 함수율, 이온교환용량, 이온전도도, 산염기 용액에 대한 내구성을 측정하였으며, 고분자 4차염의 함량이 이온교환수지의 특성에 미치는 영향을 분석하였다.
The nanofibrous anion exchange membranes based on the quaternary salt of poly(4-vinyl pyridine) (PVPy) or poly(1-vinyl imidazole) (PVIm) were prepared by electrospinning method. The electrospinning solutions were mixture of each quaternary polymer salt with poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) in DMF. The quaternary salts of the polymers were obtained through the reaction with allyl bromide and butyl bromide. The weight fraction of polymer salts in the PVdF-HFP matrix was controlled to adjust the electrospinnability. The chemical structure and surface morphology of membranes were confirmed by ATR-IR, 1H NMR, and SEM. The properties of membranes, such as thermal stability, ion exchange capacity (IEC), and ionic conductivity, were investigated by using TGA, Mohr titration, and an impedance analyzer, respectively. Also, the chemical stability in acidic and basic conditions was investigated. The performance of prepared membranes as anion exchange membrane dependent on quantity of quaternary polymer salt, was diversely analyzed.
Keywords:anion exchange membrane;electrospinning;quaternary salt;poly(4-vinyl pyridine);poly(1-vinyl imidazole)
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