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NTIS 바로가기멤브레인 = Membrane Journal, v.22 no.2, 2012년, pp.77 - 94
이혜련 (한국화학연구원 자원분리회수연구그룹) , 서봉국 (한국화학연구원 자원분리회수연구그룹) , 최용진 (동의대학교 화학공학과)
Amorphous ceramic membranes have been developed for gas phase separation and liquid phase separation (water treatment, wastewater treatment and separation of organic solvent or compounds) because of their thermal stability and solvent resistance. In this paper, ceramic membranes were categorized by ...
핵심어 | 질문 | 논문에서 추출한 답변 |
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세라믹 멤브레인의 실용화를 위해서 중요한 것은 무엇인가? | 지금까지는 각종 고분자 소재의 멤브레인이 주로 개발되고 상용화되어 왔지만, 최근에는 기체 및 수처리 등의 분야에서 세라믹 소재 멤브레인 적용에 대한 관심이 증가하고 있다. 세라믹 멤브레인의 실용화를 위해서는 나노 기공 구조를 정밀하게 제어하는 것이 중요하며, 나노 또는 그 이하(sub-nanometer)의 세공 크기를 가지는 세라믹 박막은 원하는 분자를 크기에 따라 선택적으로 투과하는 기체 분리용 멤브레인으로 이용할 수 있다. 이러한 목적으로 개발된 마이크로 기공(microporous) 실리카, 알루미나, 티타니아, 지르코니아, 제올라이트와 같은 세라믹 멤브레인의 기공 제어 관련 연구가 오랫동안 시도되어 왔다. | |
선택 투과성 멤브레인은 어떻게 분류할 수 있는가? | 혼합물 분리정제를 위한 선택 투과성 멤브레인은 소재에 따라서 고분자 멤브레인, 무기 멤브레인, 유무기 복합 멤브레인, 구조에 따라서는 대칭성과 비대칭성 멤브레인 등으로 분류할 수 있다. 대칭성 멤브레인은 또다공성과 비다공성으로 나뉠 수 있다[1]. | |
멤브레인이 우수한 분리 성능을 가지기 위해서 필요한 조건은? | 이러한 멤브레인이 우수한 분리 성능을 가지기 위해서는 다음과 같은 조건이 만족되어야 한다. 즉, i) 박막화에 의한 투과 속도 증대, ii) 결함(defect or pinhole)이 없는 양질의 분리 층, iii) 균일한 세공 분포, iv) 투과 저항이 거의 없는 지지체, v) 내구성 및 화학적 안정성이 요구된다. 이러한 조건을 고려하면서 동시에 분리 층의 기계적 물성을 보완하기 위해, 다공성 지지체(porous support)에 분리용 멤브레인을 코팅하여 복합화 하는 것이 일반적이다. |
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