| Due to the hydrophobicity of poly(vinyl chloride)(PVC), the application of PVC membrane was limited. In this paper, cellulose acetate (CA) was introduced as the second polymer component to hydrophilized PVC membrane material. The miscibility of PVC blends was investigated. The effect of the polymer blending on interfacial properties and hydrophilicity of poly(vinyl chloride) membrane material was studied by means of the high performance liquid chromatography (HPLC). The main contents of this dissertation consist of the following points:1. The general situation of membrane separation technology and the research progress of PVC membrane materials were introduced. After reviewing a lot of literature, CA was selected as the second polymer component to hydrophilized PVC by solution blend.2. The miscibility of PVC blends in tetrahydrofuran(THF) were characterized by solubility parameter, dilute solution viscometry, refractive index and glass transition temperature, etc. The result indicated that PVC/CA blend system was miscible.3. Poly (vinyl chloride) /cellulose acetate blend membrane material was prepared by means of solution blend and was packed in the High Performance Liquid Chromatography (HPLC) column after solvation treatment.4. Interfacial properties and hydrophilicity of PVC and PVC/CA blend were studied by HPLC. It was indicated that the hydrophilicity of PVC was increased by blending with CA, the separation efficiency of PVC for nondissociable organic solute was superior to that of PVC and PVC/CA as membrane material was better for desalination. |
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