陶瓷平板膜的制备与表征

Preparation and Characterization of Ceramic Flat Membrane

以α—氧化铝为主要原料,采用挤出成型工艺制备支撑体,采用浸渍涂膜工艺制备水处理用陶瓷平板膜,探讨不同烧结温度对膜层性能的影响。研究表明:1)随着膜层烧结温度的增加,膜层表面的孔隙逐渐减少,膜层孔径逐渐变小,膜层与支撑体的结合强度逐渐增强;2)1250℃烧结所得陶瓷平板膜性能最好,孔隙率为41.91%,抗压强度为17.96 MPa,耐酸碱性能良好,膜层结合强度良好,孔径分布均一,平均孔径为0.1μm左右,孔径占比达80%以上。对氧化铝废水进行过滤实验,经陶瓷平板膜处理后,废水中杂质含量可降低至万分之0.3,浊度降低至0.11 NTU。

alumina is used as the main raw material.The ceramic support is prepared by extrusion molding process,and the ceramic flat membrane for water treatment is prepared by the dip coating process.The effect of different sintering temperatures on the physical properties of the film is studied.The research shows that:1)as the sintering temperature of the film increases,the pores on the surface of the film gradually decrease,the pore size of the film gradually becomes smaller,and the bonding strength between the film and the support gradually increases.2)the ceramic membrane sintered at 1250℃has a best performance,with a porosity of 41.91%,a compressive strength of 17.96 MPa,good acid and alkali resistance,good film bonding strength,uniform pore size distribution,an average pore size of about 0.1μm,and a pore size of more than 80%.Filtering experiment is performed on the alumina wastewater,by being treated by ceramic flat membrane,the impurity content in the wastewater can be reduced to 0.3 parts per 10000,and the turbidity can be reduced to 0.11 NTU.