Hydrophilicity and antifouling property of membrane materials from cellulose acetate/polyethersulfone in DMAc

• Published in: International journal of biological macromolecules Vol. 91; pp. 143 - 150
• Main Authors: Sun, Zhonghua, Chen, Fushan
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.10.2016
• Subjects: Acetamides - chemistry; Antifouling property; Biofouling - prevention & control; Cellulose - analogs & derivatives; Cellulose - chemistry; Cellulose acetate; Hydrophilicity; Hydrophobic and Hydrophilic Interactions; Mechanical Phenomena; Membranes, Artificial; Polyethersulfone; Polymers - chemistry; Sulfones - chemistry; Surface Properties; Ultrafiltration; Ultrafiltration membrane; Viscosity; Volatilization; Water - chemistry; Polyethersulfone; Hydrophilicity; Antifouling property; DMAc; PVP; FA; Cellulose acetate; Ultrafiltration membrane; CA; PWF; FD; PES
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2016.05.072

•CA-PES ultrafiltration membranes were prepared successfully with DMAc as solvent.•The optimal composition of the blend solution was determined.•The incorporation of CA improved hydrophilicity and antifouling ability of membranes.•The addition of CA and PVP resulted in larger macrovoids and higher porosity.•CA-PES ultrafiltration membrane was determined to be a semi-compatible system. In this study, cellulose acetate (CA) was blended with polyethersulfone (PES) to endow the ultrafiltration membrane with the improved hydrophilicity and antifouling property by using N,N-dimethylacetamide (DMAc) as the solvent. The effects of blend composition and evaporation time on the mechanical strength and pure water flux were investigated. It was found that the optimal composition of the casting solution was: 18wt% (PES), 4wt% (Polyvinylpyrrolidone K30), 3wt% (CA) and 20s (Evaporation time). The characteristics of CA-PES blend membranes were investigated through the methods of contact angle goniometer, antifouling property, compatibility, thermo gravimetric analysis and SEM. The results showed that the hydrophilicity and antifouling property of CA-PES ultrafiltration membranes were enhanced in comparison with the pure PES membranes. The CA-PES membranes exhibited semi-compatibility and good thermal stability below 270°C. This study provided a potential industrial application prospect of CA-PES membranes prepared in DMAc.