Fouling Resistant PVC UF Membranes Containing Chitosan Nanoparticles

The effects of chitosan nanoparticles (CH-NP) and phosphorylated chitosan nanoparticles (PCH-NP)addition on the morphology, water permeability, and fouling resistance of polyvinyl chloride (PVC)-based ultrafiltration (UF) membranes are studied. The incorporation of CH-NP and PCH-NP resultsin a more hydrophilicity and uniform distribution of surface pore size of the membranes. Comparedto neat PVC membrane, the membrane containing ۰.۲ wt% PCH-NP shows ۳۸۹% and ۱۰% increasein water permeability and sodium alginate (SA) rejection, respectively. Furthermore, maily due to theelectrostatic repulsive forces between SA molecules and the negatively charged surface of PCH-NPcontaining membranes, these membranes exhibit a significant enhancement in the flux recovery ratio(FRR) and a reduction in the irreversible fouling ratio (IFR).

کلیدواژه ها:

UF membrane ، PVC ، chitosan nanoparticle ، fouling