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NTIS 바로가기한국미생물·생명공학회지 = Korean journal of microbiology and biotechnology, v.41 no.1, 2013년, pp.1 - 7
Ionic liquids (ILs) have been widely recognized as environmentally benign solvents. Their unique properties, including negligible vapor pressure, non-flammability, a wide liquid range and their tunable physicochemical properties by proper selection of cations and anions, make them attractive green s...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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이온성액체가 청정 용매로 칭해지는 이유는? | 이온성액체는 증기압이 영에 가까운 낮은 휘발성, 비폭발성, 고온에서도 안정적인 액체로 존재하는 높은 열적 안정성으로 인해 “청정용매(green solvents)”라 불리면서 친환경용매로 많은 관심을 받고 있다[42]. 특히, 이온성액체는 다양한 무기물, 유기물, 고분자 물질을 용해시킬 수 있고, 소수성, 용해도, 점도, 밀도 등의 물리화학적 특성을 쉽게 변화시킬 수 있어서 “디자이너용매(designer solvent)”로도 불린다[8]. | |
이온성액체를 이용한 생물반응공정은 일반적으로 어떻게 분류됩니까? | 일반적으로, 이온성액체를 이용한 생물반응공정은 세 종류로 분류할 수 있다. 이는 이온성액체 자체로서, 그리고 수용액상에서 보조 또는 공유 용매로서, 마지막으로 수용액과 이상계 또는 다상계 시스템을 이용하는 방법이다[21]. 이온성액체를 반응매질로 하여 생체촉매인 효소를 이용한 공정은 생물화학공정에 이온성액체가 가장 먼저 적용이 시도되어진 분야로, 그 연구가 다른 생물화학공정 분야에 비해 아직도 활발히 진행되고 있다. | |
이온성액체란? | 이온성액체(Ionic Liquids, ILs)는 소금과 같이 양이온과 음이온의 이온결합으로 이루어진 염화합물로써 100°C 이하의 비교적 낮은 온도에서 액체 상태로 존재하는 이온성 염이다[33, 37]. 이온성액체를 구성하는 대표적인 양이온으로는 디알킬이미다졸륨 (dialkylimidazolium), 디알킬피리디늄 (dialkylpyridinium), 디알킬피롤리디늄 (dialkylpyrrolidinium), 4급 암모늄 (quaternary ammonium), 4급 포스포늄 (quaternary phosphonium) 등이 있으며, 음이온으로는 NO3− , BF4− , PF6− , AlCl4− , Al2Cl7− , CH3CO2− , CF3SO3− (trifluoromethanesulfonate, TfO), (CF3SO2)2N− (trifluoromethanesulfonylamide, Tf2N), CH3CH(OH)CO2− (L-lactate) 등이 있다(Fig. |
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