Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation and characterization of poly (vinylidene fluoride)/TiO2 hybrid membranes
Abstract Poly(vinylidene fluoride) (PVDF)/titanium dioxide (TiO2) hybrid membranes were prepared using nano-TiO2 as the modifier, and characterized by Transmission Electron Microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The characterization results demonstrated that nano-sized TiO2 particles dispersed homogeneously within the PVDF matrix, contributing to more hydroxyls and smoother surfaces. Moreover, permeate flux, retention factor, porosity, contact angle and anti-fouling tests were carried out to evaluate the effect of TiO2 concentration on the performance of PVDF membranes. Among all the prepared membranes, PVDF/TiO2 membrane containing 10 vol.% TiO2 exhibited the best hydrophilicity with an average pure water flux up to 237 L·m−2·h−1, higher than that of unmodified PVDF membranes (155 L·m−2·h−1). Besides, the bovine serum albumin rejection of the hybrid membrane was improved evidently from 52.3% to 70.6%, and the contact angle was significantly lowered from 83° to 60°, while the average pore size and its distribution became smaller and narrower.
Preparation and characterization of poly (vinylidene fluoride)/TiO2 hybrid membranes
Abstract Poly(vinylidene fluoride) (PVDF)/titanium dioxide (TiO2) hybrid membranes were prepared using nano-TiO2 as the modifier, and characterized by Transmission Electron Microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The characterization results demonstrated that nano-sized TiO2 particles dispersed homogeneously within the PVDF matrix, contributing to more hydroxyls and smoother surfaces. Moreover, permeate flux, retention factor, porosity, contact angle and anti-fouling tests were carried out to evaluate the effect of TiO2 concentration on the performance of PVDF membranes. Among all the prepared membranes, PVDF/TiO2 membrane containing 10 vol.% TiO2 exhibited the best hydrophilicity with an average pure water flux up to 237 L·m−2·h−1, higher than that of unmodified PVDF membranes (155 L·m−2·h−1). Besides, the bovine serum albumin rejection of the hybrid membrane was improved evidently from 52.3% to 70.6%, and the contact angle was significantly lowered from 83° to 60°, while the average pore size and its distribution became smaller and narrower.
Preparation and characterization of poly (vinylidene fluoride)/TiO2 hybrid membranes
Li, Weiying (Autor:in) / Sun, Xiuli (Autor:in) / Wen, Chen (Autor:in) / Lu, Hui (Autor:in) / Wang, Zhiwei (Autor:in)
Frontiers of Environmental Science & Engineering ; 7 ; 492-502
12.05.2012
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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