聚酰胺类、纤维素类均质与合金膜材料研制及其界面分离性能研究

【作者】 张秀真；

【导师】 高素莲；

【作者基本信息】 安徽大学 ， 高分子化学与物理， 2004， 硕士

【摘要】 本论文以聚己内酰胺及共聚酰胺类、纤维素类作为原料，研制出液相色谱柱填料，并采用高效液相色谱法对两类聚合物及其合金膜材料的亲水性和界面分离性能进行了研究、表征。应用多种方法表征其合金膜材料的相容性和热稳定性。主要工作内容如下： 1．本论文介绍了膜分离技术的概况以及高效液相色谱的发展。详细论述了高效液相色谱法表征膜分离技术的理论基础，为膜分离技术提供了一新的研究手段，也拓展了高效液相色谱的应用领域。 2．通过溶剂化处理制得尼龙-6(PA-6)、二元共聚尼龙-170(PA-170)、三元共聚尼龙-130(PA-130)均质膜材料，用液相色谱法研究了这三种膜材料的界面分离性能，PA-130最适合做脱盐膜材料，而且对不离解的极性有机物的分离效果最好。三者中PA-6的亲水性最好。 3．通过溶液共混的方法制备了乙基纤维素／醋酸纤维素合金膜材料，用DSC、粘度法、折光指数等研究了合金膜材料的溶液体系和固体状态的相容性，结果表明两者是相容的：通过TG测试EC及合金膜材料的热性能，合金膜材料的热稳定性较EC有所升高；利用液相色谱法研究合金的和均质膜材料的界面分离性能，合金膜材料的亲水性以及对不离解的极性有机物的分离效果都优于EC，而且EC／CA(4：1)合金最适合做脱盐膜材料。更多还原

【Abstract】 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.更多还原