화학공학소재연구정보센터
Journal of Materials Science, Vol.56, No.17, 10218-10230, 2021
Preparation of polyvinylidene fluoride modified membrane by tannin and halloysite nanotubes for dyes and antibiotics removal
Separation of dyes and antibiotics is particularly important in wastewater treatment. In this work, the hydrophilic modified polyvinylidene fluoride (PVDF) membranes were prepared by deposition of halloysite nanotubes (HNTs), tannic acid (TA) and ferric chloride (FeCl3). The surface morphology of the modified membranes was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). In addition, the Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) were used to evaluate the chemical compositions of the membrane. The measurements of water contact angle (CA) and pure water flux (J(w)) show that the PVDF membrane has excellent permeability and hydrophilicity. The PVDF modified membrane has good separation performance for dyes, and the rejection ratios of methyl orange, methylene blue and rhodamine B were 98.2%, 94.6% and 96.9%, respectively. In addition, the rejection ratios of modified membrane for tetracyclines and bisphenol A were significantly improved. Most important of all, the TA-Fe(III)/HNTs/PVDF membrane has excellent antifouling performance after cycles tests. These results indicate that the TA-Fe(III)/HNTs/PVDF modified membranes have a great application prospect in dye and antibiotic wastewater treatment.