电泳沉积法制备氧化铝陶瓷膜的研究

以工业级陶瓷片为支撑体，氧化铝溶胶为电泳液，采用电泳沉积的方法制备了氧化铝陶瓷膜。当在30 V的电压条件下电泳3 min，经沉积-干燥-烧结工艺，反复进行3次后，即可得到氧化铝纳滤膜。采用SEM和液-液排除法等手段对纳滤膜进行表征，结果表明，膜厚在50 μm左右，孔隙率为31.51%，平均孔径为3.1 nm，孔径分布为2.88～5.76 nm。性能测试表明，氧化铝纳滤膜对无机污染物和有机污染物均有强的截留作用，且性能较稳定。

Preparation of alumina ceramic membranes by electrophoresis

Alumina ceramic membranes have been prepared by electrophoresis using an industrial ceramic as the electrophoretic matrix and alumina sol as the electrophoretic liquid.A nanofiltration membrane was prepared using the electrophoretic process and a coating-drying-sintering process repeated three times.The optimum electrophoresis time was found to be 3 min with a voltage of 30V.The Al2O3 ceramic membrane obtained under these experimental conditions was characterized by SEM and liquid-liquid displacement methods.A ceramic membrane with a thickness of 50 μm had a porosity ratio of 31.51%,a pore size of 3.1 nm and a pore size distribution of 2.88 nm to 5.76 nm.Performance tests showed that the membrane had strong interception effects on both inorganic pollutants and organic pollutants.