Clarification of red wine by hydrophilic modification of PES ultrafiltration membranes

TiO2hydrophilic modification of Poly ( ether sulfones) ( PES) ultrafiltration ( UF) membranes were prepared by phase inversion for clarification of red wine. The membranes were characterized by scanning electron microscope ( SEM) , Fourier transform-infrared ( FT- IR) and contact angle measurements, respectively.The results showed that the hydrophilic and surface roughness of PES/TiO2UF membranes was increased with increasing of content SiO2.The absorption of protein and polysaccharide on PES/TiO2UF membrane surfaces were decreased and membrane fouling was reduced due to the incorporation of SiO2into PES. In addition, the permeation flux attenuation of PES/TiO2UF membranes was lower than PES UF membrane.When 0.75% of molar content of SiO2was introduced into PES, PT75 UF membranes exhibited higher permeation flux of 18.09L / ( m2·h) than pure PES with a permeation flux of 16.88L / ( m2·h) for clarification of red wine. The UF clarified wine presents satisfied clarification.