Antibacterial photocatalytic self‐cleaning poly(vinylidene fluoride) membrane for dye wastewater treatment. (19th July 2017)

• Record Type: Journal Article
• Authors: Peng, Yixin; Yu, Zongxue; Pan, Yang; Zeng, Guangyong
• Is Part Of: Polymers for advanced technologies. Volume 29:Number 1(2018)
• Page Start: 254
• Page End: 262
• Publication Date: 2017-07-19
• Subjects: Ag‐TiO2‐APTES -- antibacterial -- photocatalytic self‐cleaning -- PVDF; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pat.4110
• Languages: English
• ISSNs: 1042-7147

Abstract

Abstract : Membrane technology has been successfully applied for the removal of dyes from wastewater in the textile industry. A novel poly(vinylidene fluoride) (PVDF) membrane was prepared via blending with different dosages of Ag‐TiO2 ‐APTES composite for dyeing waste water treatment in our study. And the effect of Ag‐TiO2 ‐APTES blended into the PVDF membrane was discussed, including the rejection rate of methylene blue (MB) dye, membrane morphology, surface hydrophilicity, antibacterial activity, and a certain photocatalytic self‐cleaning performance. X‐ray diffraction and Fourier transform infrared characterization confirmed that Ag‐TiO2 was functionalized by amount of hydroxyl group (−OH) and amino group (NH−), which provided by APTES. Contact angle measurement certified that the hydrophilicity of the membrane surface increased, with the contact angle decrease to 61.4° compared with 81.8° of original PVDF membrane. MB rejection rate was also increased to 90.1% after addition of Ag‐TiO2 ‐APTES, and the rejection of original membrane was only 74.3%. The morphologies of membranes were observed by scanning electron microscope, which indicated that Ag‐TiO2 ‐APTES had a good dispersion in membrane matrix and also improved the microstructure of membranes. Besides, UV irradiation experiments were performed on the composite films contaminated by MB, and the result showed that Ag‐TiO2 ‐APTES nanoparticle provided PVDF membrane with a certain photodegradation capacity under UV irradiation. Moreover, antibacterial activity of the composite membrane was also demonstrated through antibacterial experiment, Escherichia coli as the representative bacteria. Perhaps, this research may provide a new way for PVDF blending modification.