聚乙烯醇/碳纳米管复合超滤膜的制备及应用研究

PREPARATION AND APPLICATION OF PVA/CARBON NANOTUBE COMPOSED ULTRAFILTRATION MEMBRANES

以聚乙烯醇(PVA)为基膜材料,以羧基化碳纳米管(c-CNT)为添加剂,采用浸没沉淀相转化法制备了一种新颖的PVA/c-CNT复合超滤膜。考察了c-CNT的用量对膜力学性能、水通量、截留率及耐污染性能的影响。结果表明,当c-CNT用量为2份时,复合超滤膜的拉伸性能、水通量、截留率均达到最佳,膜的抗污染能力得到提高。分别以甲基橙和甲基紫作为代表偶氮类和三苯甲烷类印染废水的模型化合物,考察复合超滤膜对它们的吸附性能。结果表明,膜对这两类物质的吸附性能较强,再生能力达95%以上。该PVA/c-CNT复合超滤膜可应用于印染废水的处理中。

Using polyvinyl alcohol（PVA） as the basic material, the carboxyl carbon nanotubes（c -CNT） as additive, a no- vel PVA/c - CNT composed ultrafiltration membrane was fabricated by the immersion precipitating phase inversion process. The effects of c - CNT content on the performances of membranes were investigated, such as mechanical property, water flux, the removal efficiency and anti-fouling characteristics. The results showed that the tensile properties, water flux and removal efficiency achieved optimum when c - CNT content was 2 phr, the ability of membrane anti-fouling was improved. Methyl orange and methyl violet, which were representative of azo dyes and triphenylmethane dyes waste water, were as model compounds in order to investigate the adsorption performance of the composed uhrafiltration membrane to dye waste water. The results showed that the adsorption effect was great. The PVA/c - CNT composed ahrafihration membrane. It could be used to treat industrial dyes waste water.