凝固浴处理对聚氨基葡糖超滤膜分离性能的影响

采用凝固浴凝胶工艺处理聚氨基葡糖超滤膜，实验结果表明，经凝固浴处理后，聚氨基葡糖超滤膜对酸性红B溶液的截留率提高了83.7%；凝固浴的温度、凝固剂的浓度、凝固时间等参数对聚氨基葡糖超滤膜的截留率、渗透通量和孔结构均有一定的影响，选择适当的处理条件可提高膜的分离效率.

Effects of Coagulation Bath Treatment on Separation Properties of Chitosan Ultrafiltration Membrane

The separation property of membrane is related to the aperture structure of the membrane. In this paper, the chitosan ultrafiltration (UF) membrane was immersed into a coagulation bath with proper concentration and temperature and its aperture structure was modified. The results showed that the retention rate of chitosan membranes increased by 83.7% after being treated by precipitation. The retention rate, flux and aperture structure of chitosan membranes were affected by temperature of the coagulation bath, concentration of gelating agents and time of immersion precipitation. It is necessary to select appropriate parameters to enhance the separation property of chitosan UF membrane.