Application of Cyclized Polyacrylonitrile for Ultrafiltration Membrane Fouling Mitigation

Membranes

Nadezhda Tian¹  Galina Polotskaya¹  Alexandra Pulyalina¹  Anna Senchukova¹  Alexander Novikov¹  Maria Ryabikova¹  Ilya Faykov¹  Natalia Saprykina² 

[1] Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia;Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia;

关键词: ultrafiltration;    polymer composites;    cyclized polyacrylonitrile;    poly(amide-imide);   

DOI  :  10.3390/membranes12050489

来源: DOAJ

【 摘 要 】

In this study, novel composites were produced by blending partially cyclized polyacrylonitrile (cPAN) and poly(amide-imide) (PAI) in N-methylpyrrolidone in order to fabricate asymmetric membranes via phase inversion method. The compatibility of PAI and cPAN through possible intermolecular interaction was examined by quantum chemical calculations. The composite membranes were characterized by FTIR, SEM, contact angle measurements, etc. A considerable reduction in the contact angles of water and ethylene glycol (EG) was observed after adding cPAN to the PAI membrane, which is evidence of improved membrane hydrophilicity. Membrane transport properties were investigated in ultrafiltration tests by measuring the pure water flux, rejection of proteins, and flux recovery ratio (FRR). The best properties were found for the membrane containing 5 wt% cPAN; an increase in BSA rejection and a remarkable increase in FRR were observed, which can be explained by the hydrophilization of the membrane surface provided by the presence of cPAN.

【 授权许可】

Unknown