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NTIS 바로가기멤브레인 = Membrane Journal, v.28 no.5, 2018년, pp.307 - 319
김도형 (상명대학교 그린화학공학과) , 강문성 (상명대학교 그린화학공학과)
Ion-exchange membrane (IEM) has fixed charge groups and is a separation membrane which is capable of selectively transporting ions of the opposite polarity. Recently, the interest in IEMs has been increasing as the importance of the desalination and energy conversion processes using them as the key ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
이온교환막(ion-exchange membrane)이란 무엇인가? | 이온교환막(ion-exchange membrane)은 고분자 매트릭스에 고정되어 있는 전하기(fixed charge groups)에 기인한 정전기적 인력 및 반발력을 이용해 용액 중 음이온 또는 양이온을 선택적으로 분리할 수 있는 멤브레인(membrane)이다. 고성능⋅저가 멤브레인의 개발과 더불어 이온교환막 공정은 경제적이며 친환경적인 분리공정으로 여겨지고 있다. | |
불균질 이온교환막 제조가 가지는 장점은 무엇인가? | 즉, 이온교환기를 포함한 영역과 포함되지 않은 영역이 혼합되어 있으므로 불균질하고 결과적으로 균질 이온교환막에 비해 전기적 저항이 높고 이온선택성도 저하되는 단점을 가지고 있다. 그러나 저가의 원료를 사용하고 공정이 간단하므로 멤브레인의 제조 단가를 값싼 장점을 가지고 있다. | |
이온교환막 분리공정은 어떤 분야에서 쓰이는가? | 고성능⋅저가 멤브레인의 개발과 더불어 이온교환막 공정은 경제적이며 친환경적인 분리공정으로 여겨지고 있다. 현재 이온교환막 분리공정은 수계 이온성 물질의 탈염 및 농축, 이온성 유가 원료의 분리⋅정제, 초순수 제조, 식품 제조 시 pH 조정, 산세 폐액으로 부터의 산 분리 및 유가 금속 회수 및 산⋅염기 제조와 같은 다양한 산업 분야에서 이용되고 있다. 최근 종래의 분리공정 외에도 역전기투석, 연료전지 및 레독스 흐름 전지 등 에너지 생산⋅저장을 위한 공정의 핵심부품으로 응용되고 있어 이온교환막에 대한 관심은 크게 증가하는 추세에 있다. |
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