界面聚合法制备MABR中空纤维膜

利用界面聚合法制备了用于无泡曝气膜生物反应器(MABR)废水处理的聚苯胺 聚偏氟乙烯中空纤维复合膜，考察了普通聚合、掺杂和脱掺杂3种制备条件下得到的中空纤维膜的表面性能。测定了中空纤维膜的气体通量、膜丝表面亲水性，并观察了膜丝表面粗糙度的变化。结果表明，与初始聚偏氟乙烯中空纤维膜相比，复合中空纤维膜的表面亲水性得到显著改善，特别是掺杂后膜的接触角由原先的89°下降到73°；脱掺杂后复合中空纤维膜的气体通量大于掺杂改性膜，但是小于原膜丝；脱掺杂后复合中空纤维膜的表面粗糙度较初始膜有较大提高。挂膜试验中，脱掺杂后的复合中空纤维膜表现出了优异的生物挂膜性能，是一种具有潜在应用价值的MABR中空纤维膜。

Preparation of MABR Hollow Fiber Membrane by Interfacial Polymerization

The PVDF hollow fiber membrane was successfully modified by PANI through interfacial polymerization.The properties of membrane under different processing conditions,such as the membrane gas flux,hydrophilicity and surface roughness have been analyzed.The results showed that,compared with the original membrane,the water contact angle decreased from 89° to 73°,showing the improvement of hydrophilicity.The membrane gas flux of dedoping sample was higher than that of doping membrane,but lower than the original one.Also the membrane surface roughness was enhanced after coating PANI.The modified membrane played a better performance in the biofilm growth experiment,indicating that the modified membrane has a large potential ability in the application of MABR.