Diallyl dimethyl ammonium chloride-grafted cellulose filter membrane via ATRP for selective removal of anionic dye
In this paper, poly(diallyl dimethyl ammonium chloride) (PDADMAC)-grated cellulose filter membranes (cellulose-g-PDADMAC) were fabricated via atom transfer radical polymerization (ATRP) for selective removal of anionic dye from wastewater. Gel permeation chromatography (GPC), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) showed that PDADMAC was grafted onto the filter membrane surface via a controllable living polymerization. The resultant cellulose-g-PDADMAC membranes exhibit selective removal for anionic methyl orange (MO) through rapid and facile filtration using model MO/rhodamine B (RB) mixture, due to the electrostatic interaction between quaternary ammonium groups of membrane and the sulfonic groups of MO. The decolorization ratio of MO remains higher than 95% when the graft ratio is 13.3% even after 6 cycles. Cellulose-g-PDADMAC also shows effective antimicrobial activities against S. aureus and E. coli. The modified filter membranes are promising for the potential application in wastewater purification.
KeywordsATRP Filter membrane DADMAC Dye Selective removal
This work was supported by the National Natural Science Foundation of China (31470598, 21774021), the Award Program for Minjiang Scholar Professorship, and International Science and Technology Cooperation and Exchange Project of Fujian Agriculture and Forestry University (KXb16002A).
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