Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4987952 | Desalination | 2017 | 12 Pages |
Abstract
Thermoresponsive polyvinylidene fluoride/silica-poly (N-isopropylacrylamide) (PVDF/SiO2-PNIPAM) mixed matrix membranes were synthesized using diffusion induced phase separation techniques via direct blending method. The effects of SiO2-PNIPAM particle concentrations and surface cavity size on membrane physicochemical properties were investigated through oil emulsion separation using cross-flow ultrafiltration. Compared with pristine PVDF membrane, the PVDF/SiO2-PNIPAM membrane showed higher alternated thermal cleaning ratios (N = 2.04) especially at higher SiO2-PNIPAM particle concentrations. Proper control of cavity size allows better particles actuation and minimized the surface roughness that would induce fouling phenomenon. The flux recovery ratio of 69.91% can be achieved by preparing the membrane using dope solution at 25 °C, coagulation bath temperature at 40 °C at particle dosage of 1.0 wt.% (M25-40/1.0). It was found that the actuation force as a result of temperature swing is responsible for loosening the irreversible fouling layer (gel layer) on the membrane surface.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
H.P. Ngang, A.L. Ahmad, S.C. Low, B.S. Ooi,