Aminated Polyacrylonitrile Nanofiber Membranes for the Removal of Organic Dyes
Yinghui Zhao, Qin Yang, Bin Yan, Baicang Liu, Yingchun Gu, Yi Lin, Jiaojiao Shang, Wentao Liu, Sheng Chen, Jianwu Lan
Abstract
Adsorption is a promising technique for the effective removal of dyes from dyeing wastewater resulting from the paper, textile, and leather industries. Herein, we report a facile strategy for preparing adsorption membrane-based aminated ultrathin polyacrylonitrile (UPAN-N) nanofibers to effectively remove the synthetic dyes from wastewater. The UPAN-N nanofibers were synthesized using a mixed solution electrospinning procedure, followed by triethylenetetramine modification. After the amino modification, the surface of the obtained UPAN-N nanofiber membrane is rich in amino groups, which endows the resulting membrane with an ultrahigh adsorption capacity of more than 1800 mg/g for the organic dye DR23 and a rapid adsorption rate for DR23 solutions with the concentrations ranging from 20 to 100 mg/L. This work not only provides a feasible method for the preparation of high-capacity adsorbents but also offers the possibility of preparing nanofibers by a mixed solution electrospinning procedure.