Diazo Resin and Acidified Carbon Nanotube Modified Polyacrylonitrile Hollow Fiber Membrane.

In this paper, multilayer diazo resin acidified nanotubes/polyacrylonitrile composite films were prepared by grafting diazo resin (DR) and acidified carbon nanotubes (CNT) onto the surface of commercial PAN hollow fiber films by layer by layer self-assembly method. Scanning electron microscopy (SEM), infrared spectroscopy, contact angle, thermogravimetry (TG), water flux and adsorption of heavy metals were used to study. The results showed that the diazo resin (DR) and acidified carbon nanotubes (CNT) were successfully grafted onto PAN Membrane by layer by layer self-assembly method, and carbonyl and carboxyl groups appeared on the surface of modified PAN Membrane; the layer by layer self-assembly did not damage the original morphology of PAN membrane; the hydrophilicity of modified PAN-(DR-CNT)₃ membrane was improved, and the water flux was increased. The PAN membrane before and after modification has similar heat and weight loss, and the PAN membrane before and after modification has good thermal stability; the PAN membrane after modification can reach adsorption equilibrium in a relatively short time, and has good adsorption performance for heavy metal copper ions. [ABSTRACT FROM AUTHOR]