膜科学与技术

无缺陷氧化铝微滤膜的制备研究

作者：闻娟娟，范益群

单位：南京工业大学化学化工学院, 材料化学工程国家重点实验室, 南京210009

关键词：陶瓷膜; 无缺陷; 错流过滤; 修复

出版年,卷(期):页码： 2013,33(5):19-24

摘要：

采用错流过滤技术对平均孔径为0.2 μm氧化铝膜进行孔缺陷修复,着重研究修复时间对多孔陶瓷膜渗透通量和孔缺陷的影响. 研究结果表明: 控制膜面流速和跨膜压差分别为1 m•s-1和0.1 MPa时,随着修复时间的增加,膜厚增加,修复率提高; 当修复时间为12 min,大量实验结果统计表明其修复率达90 %. 此外,经12 min修复氧化铝膜上制备的氧化锆超滤膜的截留分子量为22 kDa,而在未修复氧化铝膜上制备的氧化锆超滤膜对混合分子量葡聚糖的截留率未达到90 %,由此可见修复有利于提高氧化锆超滤膜的完整性。

The technology of cross flow filtration technology was a novel method used in the field of pore defect repairing, and this study was focused on the alumina membrane with an average pore size of 0.2 μm. The repairing time was the major factor taken into consideration. The results indicated that the membrane thickness increased with the raise of repairing time under the conditions of a diluted suspension, 1 m•s-1 flow speed and 0.1 MPa transmembrane pressure. When the repairing time reached 12 min, 90 % of the tubular membranes owned a relatively low pore size of the defect around 1 μm. Additionally, the zirconia ultrafiltration membrane made on the repaired alumina membrane showed a good rejection property concerning MWCO, which could reach 22 kDa compared with great higher MWCO made on the unrepaired alumina membrane. It could figure out that the repairing favored the preparation of subsequent zirconia ultrafiltration membrane.

闻娟娟(1987-),女,江苏南通市人,硕士,研究方向为膜分离. *通讯联系人

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