Effect of polydopamine deposition conditions on fouling resistance, physical properties, and permeation properties of reverse osmosis membranes in oil/water separation

Recent progress in developing advanced membranes for emulsified oil/water separation

“…This special surface wettability endowed the membrane with superior hydrophilic and antifouling performance. In addition to chemical reactions, directly depositing hydrophilic materials such as polydopamine, 70 poly(ethylene glycol), 71 polyvinyl alcohol 72 and chitosan 73 onto membrane surfaces via physical absorption is another approach by which to modify membranes. Freeman and co-workers successfully deposited dopamine onto a polyamide reverse osmosis membrane.…”

“…Freeman and co-workers successfully deposited dopamine onto a polyamide reverse osmosis membrane. 70 It is well known that dopamine has a strong adaptability to cover any type of surface through the formation of an adhesive polydopamine layer via selfpolymerization, which can tremendously alter surface properties such as wettability and biocompatibility. [74][75][76][77] In this work, the reverse osmosis membrane coated by the polydopamine layer exhibited a higher flux for oil/water emulsion separation than the one without modification, although there was no obvious change in the membrane hydrophilicity.…”

Thin film composite membranes comprising of polyamide and polydopamine for dehydration of ethylene glycol by pervaporation

“…Composite membranes produced by simply coating polydopamine onto a substrate have been used for the dehumidification of propylene gas [26], separation of thiophene from octane by pervaporation [27] and salt removal from water by nanofiltration [28]. The fouling resistance of commercial reverse osmosis membranes [29,30] and the permeation flux of commercial ultrafiltration membranes [24] were reported to have been improved by surface coating of polydopamine.…”

Synthesis of Core-Shell MgO Alloy Nanoparticles for Steelmaking

“…In addition, the thickness of the dopamine layer can be controlled by changing the initial concentration and polymerization time of the dopamine. This is important especially considering that thickness control is very important for material design and surface modification [12]. Due to the excellent and versatile coating capabilities of dopamine, it can be used as a precursor of carbon to form a uniform and continuous coating on the NP surface [13,14].…”