Preparation of antifouling cellulose acetate membranes with good hydrophilic and oleophobic surface properties

• Published in: Materials letters Vol. 252; pp. 1 - 4
• Main Authors: Shen, Shu-su, Chen, Hao, Wang, Rui-hua, Ji, Wei, Zhang, Yiyuan, Bai, Renbi
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2019; Elsevier BV
• Subjects: Antifouling; Cellulose acetate; Cellulose acetate membrane; Functional; Hydrophilicity; Materials science; Membranes; Polymeric composites; Surface properties; Surfaces; Functional; Polymeric composites; Surfaces; Cellulose acetate membrane; Antifouling
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2019.03.089

[Display omitted] •Novel polymer additive was synthesized from cellulose acetate via simple one-step reaction.•Improved surface hydrophilicity and oleophobicity were obtained for blend CA membranes.•Same molecular skeleton helped the polymer compatibility and the mechanical strength.•CA membranes showed good antifouling performance in 3 typical solutions with up to 91.2% RFR. Cellulose acetate (CA) membranes have shortages of low permeability and membrane fouling. A novel polymer additive (denoted as PA) has both hydrophilic and oleophobic groups was synthesized from CA via a one-step reaction. Blend membrane fabricated from mixing CA and PA in 4:1 showed improved membrane properties. By adding 1 wt% of PVPk30, the pure water flux of blend CA membrane was increased from 0 to 34.0 L/m2·h·bar. The filtration experiments indicated the membranes exhibited good antifouling property, excellent anti-oil performance that 92.5% of oil rejections and 90% relative flux recovery were obtained.