| Membrane materials of polycaprolactam, copolyamide and cellulose are prepared as the column packing of liquid chromatography. Hydrophilicity and interfacial separation properties of them and the alloy (EC/CA) were studied and characterized by mean of the high performance liquid chromatography (HPLC).Their compatibility and thermal stability of the blends were characterized by kinds of means.The main contents of this dissertation consist of the following points:1. The general situation of membrane separation technology and the development of HPLC were summarized. The theory was discussed that the membrane separation technology was characterized by HPLC. A new means was provided for studying the membrane separation technology. At the same time, the application field of HPLC was extended.2. These membrane materials of nylon-6 ( PA-6 ) , binary copolyamide-170 ( PA-170 ) and tertiary copolyamide-130 ( PA-130 ) were prepared by the solvation treatment. The interfacial separation properties of them were studied by means of HPLC. PA-130 was the best membrane material to desalt of three, and the separation efficiency of PA-130 for nondissociable organic solute was superior to that of PA-6 and PA-170. While the hydrophilicity of PA-6 was the best of them.3. The Ethyl Cellulose ( EC ) / Cellulose Acetate ( CA ) alloy were prepared by means of solution blending. Results obtained from DSC solution viscosity and refraction index, etc. showed that, there was good compatibility existing in between EC and CA. Thermal stability of the blends improved, comparing to that of pure EC. The interfacial separation properties of the alloys and EC were characterized by HPLC. The alloys were superior to EC at the hydrophilicity and the separation efficiency for nondissociable organic solute. EC/CA (4:1 ) alloy was the best membrane material to desalt. |
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