Solubility of the Nematic Liquid Crystal E7 in Supercritical Carbon Dioxide

Solubility of the Nematic Liquid Crystal E7 in Supercritical Carbon Dioxide
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向列液晶 E7 在超临界二氧化碳中的溶解度

DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Aguiar
A. Aguiar
中科院分区：
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文献类型：
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作者：
A. Brás;T. Casimiro;J. Caldeira;A. Aguiar

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被引文献

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采用静态分析法测定了E7（一种双相液晶混合物）在（313.15、323.15和333.15）K和19 MPa压力下在超临界二氧化碳（scCO2）中的溶解度。使用简单但选择性的反相高效液相色谱法分析来自富CO2相的样品。结果明确表明，scCO2可以在相对较低的压力下将混合物向E7组分压裂。由于缺乏热力学数据，溶解度数据使用Chrastil方程关联。所得结果对超临界流体聚合物分散液晶的设计和开发具有重要意义。
The solubility of E7, a nematic liquid crystal mixture, in supercritical carbon dioxide (scCO2) was measured using a static analytical method at (313.15, 323.15, and 333.15) K and at pressures up to 19 MPa. Samples from the CO2-rich phase were analyzed using a simple but selective reversed-phase high performance liquid chromatographic method. The results indicate unambiguously that scCO2 can fractionate the mixture toward the E7 components at relative low pressures. Due to the lack of thermodynamic data, the solubility data were correlated using the equation of Chrastil. The results obtained are important for the design and development of polymer-dispersed liquid crystals using supercritical fluid technology.