EFFECT OF ACID–BASE PROPERTY OF INORGANIC NANOPARTICLES ON ANTIFOULING PERFORMANCE OF PVDF COMPOSITE ULTRAFILTRATION MEMBRANES

Mingjia He and Baoli Shi ()
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Mingjia He: Department of Chemistry, College of Science, Northeast Forestry University, Harbin, Heilongjiang 150040, China
Baoli Shi: Department of Chemistry, College of Science, Northeast Forestry University, Harbin, Heilongjiang 150040, China

Surface Review and Letters (SRL), 2009, vol. 16, issue 03, 415-419

Abstract: Pure poly(vinylidene fluoride) (PVDF) membrane and PVDF composite membranes modified by three kinds of inorganic nanoparticles (SiO2,Al2O3, andTiO2) were made using a phase inversion method and characterized by pure water flux, retention efficiency of Bovine serum albumin (BSA), flux reduction coefficient, and scanning electron microscope (SEM). The results of flux reduction coefficient illustrated that PVDF membrane modified by nanoparticles had better antifouling property in the order ofTiO2,Al2O3,SiO2. The Lewis acid–base properties of the nanoparticle materials were measured by inverse gas chromatography (IGC). The Lewis acid number,Ka, and Lewis base number,Kb, had the following orderKaTiO2 KbAl2O3> KbSiO2. The experimental results indicated that PVDF membrane modified by nanoparticles with relatively strong base exhibited excellent antifouling performance.

Keywords: PVDF; ultrafiltration; nanoparticle; inverse gas chromatography (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012809

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