Development of a Microfluidic Device for Measurement of Distribution Behavior between Supercritical Carbon Dioxide and Water
Development of a Microfluidic Device for Measurement of Distribution Behavior between Supercritical Carbon Dioxide and Water
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DOI：
10.2116/analsci.27.567
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发表时间：
2011-06
影响因子：
1.6
通讯作者：
A. Ohashi;M. Sugaya;Haeng-Boo Kim
中科院分区：
文献类型：
--
作者：
A. Ohashi;M. Sugaya;Haeng-Boo Kim
提出了一种用微芯片测量超临界二氧化碳与水之间分配行为的方法。用二甲基二氯硅烷对微通道进行表面改性，可使微通道中的超临界二氧化碳和水相发生自发的相分离。水相与超临界二氧化碳相的最大接触时间为0.58 s。该装置可承受高达12.8 MPa的压力。在微通道中，三乙酰丙酮合钴（III）（Co（acac）_3）从超临界二氧化碳相到水相的分配可以被测量。随着两相接触时间的延长，Co（acac）_3在水相中的浓度增加。这些演示表明，在这项研究中开发的方法可以用来测量超临界二氧化碳和水之间的分配行为。
A measuring method for the distribution behavior between supercritical carbon dioxide and water by a microchip was developed. A surface modification of the microchannel by dichlorodimethylsilane induced a spontaneous phase separation of the supercritical carbon dioxide and aqueous phases in the microchip. The maximum contact time of the aqueous phase to the supercritical carbon dioxide phase was obtained as 0.58 s. This device withstood pressure up to 12.8 MPa. The distribution of tris(acetylacetonato)cobalt(III) (Co(acac)_3) from the supercritical carbon dioxide phase to the aqueous phase in a microchannel could be measured. The concentration of Co(acac)_3 distributed into the aqueous phase was increased by lengthening the contact time of both phases. These demonstrations showed that the method developed in this study could be used to measure the distribution behavior between supercritical carbon dioxide and water.