In order to get inorganic ceramic membrane with good properties,and better sewaging disposal condition single tube Al2O3 ceramic suppor CuO and SiO2 membrane are used as raw materials,and combined by dip-coating method toughly to prepare porous ceramic composite membrane.In the process of experiment,the influence factors such as coating time,dipping time,pull rate,dry conditions were discussed.The sample was characterized by mercury poro-simeter and scanning electron microscopy (SEM).The results show that the composite mem-brane was prepared by support and the membrane suspensions after pretreatment with the ex-periment steps of impregnation,drying,impregnation,drying and sintering.The process pa-rameters are as follows:three times coating,20 s dipping,1 mm/s pull rate,under the condi-tion of 50% RH,40 ℃ to be dried,and sintered.Eventually composite membrane which is not easy to fall off is prepared without crack and with good bonding performance and good pore structure.%为获得性能良好且符合污水处理条件的无机陶瓷膜,单管式氧化铝陶瓷支撑体和SiO2涂膜液为原料,采用浸渍提拉法对其进行高强度结合,制备多孔陶瓷复合膜.探讨涂膜次数、浸渍时间、提拉速率、干燥条件等对涂膜的影响,并利用压汞仪、扫描电镜等对所制备的多孔陶瓷膜的性能进行表征.结果表明,利用预处理后无表面缺陷的支撑体和涂膜液,按照浸渍-干燥-浸渍-干燥-烧结步骤,涂膜3次,每次浸渍时间20 s,提拉速率1 mm/s,在50%RH,40℃条件下干燥并烧结;最终获得表面完整无开裂,结合性能稳定,不易脱落,孔隙结构良好的复合膜.
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