High performance PVDF-TiO sub(2) membranes for water treatment

In order to obtain low-fouling membranes, TiO sub(2) nanoparticles were entrapped in PVDF membranes prepared by the NIPS wet-process. Typical asymmetric membrane structure was obtained. Membrane structure, hydrophilic properties and permeability were improved in comparison with PVDF neat membrane wh...

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Bibliographic Details
Published in:Chemical engineering science 2015-02, Vol.123, p.283-291
Main Authors: Mericq, J-P, Mendret, J, Brosillon, S, Faur, C
Format: Article
Language:English
Subjects:
Cleaning
Flux
Irradiation
Membrane structures
Membranes
Permeability
Polyvinylidene fluorides
Titanium dioxide
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Summary:In order to obtain low-fouling membranes, TiO sub(2) nanoparticles were entrapped in PVDF membranes prepared by the NIPS wet-process. Typical asymmetric membrane structure was obtained. Membrane structure, hydrophilic properties and permeability were improved in comparison with PVDF neat membrane when increasing TiO sub(2) concentration up to an optimum concentration of 25%wt. Maximum permeate flux of 150 L/h/m super(2) was successfully obtained. For TiO sub(2) content beyond 25%wt, TiO sub(2) particles agglomeration prevents the improvement of hydrophilic properties and permeability. Under UV irradiation, phenomena of super-hydrophilicity due to presence of TiO sub(2) in the composite membrane permits to suppress pure water permeate flux decline and reach higher fluxes. Fouled composite membranes after BSA filtration were successfully cleaned using water and UV irradiation. Permeate flux was totally recovered after this cleaning.
ISSN:0009-2509
DOI:10.1016/j.ces.2014.10.047