Preparation of high‐performance reverse osmosis membrane by zwitterionic polymer coating in a facile one‐step way

Abstract

Aiming at preparing high‐performance polyamide (PA) reverse osmosis (RO) membrane in a facile and high effective way, the codeposition strategy of dopamine and zwitterionic polymer was first applied to modify PA RO membrane. The noncovalent bonds between dopamine and Poly [2‐(Methacryloyloxy)ethyl]dimethyl‐(3‐sulfopropyl)ammonium hydroxide (PSPE) act to fix PSPE onto the membrane surface and simultaneously destroy the interaction force between dopamine aggregations so that the modified layer could equably form on the PA layer. PSPE significantly improved the hydrophilicity [the water contact angle (WCA) of S‐D‐3 is 25.3°] of the modified membrane. And, the smoother surface was noticed on the modified membrane. All of these endow the PSPE/dopamine modified membrane superb water flux (the maximum water flux is 51.86 L m−1 h−1 at 1.6 MPa and 25 °C) and impressive antifouling and anti‐adhesion properties to bovine serum albumin (BSA) (protein), sodium dodecyl sulfate (anionic surfactant), and dodecyl trimethyl ammonium bromide (cationic surfactant) with salt retention was well maintained. Notably, in the BSA fouling test, nearly 100% of the flux recovery ratio was achieved. This method is promising to be employed in industrial scale‐up production. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48355.

Impact of MWCO and Dopamine/Polyethyleneimine Concentrations on Surface Properties and Filtration Performance of Modified Membranes

“…Among the MSM techniques, the mussel-inspired method (MI) has gained interest [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Based on the adhesive capacity of mussels, Lee, Dellatore, Miller, and Messersmith (2007) [ 36 ] proposed the immersion of material in a solution of dopamine (DA), with slightly alkaline pH and in the presence of oxygen (conditions for DA polymerization), to form a thin adhesive polymeric layer on the surface, known as polydopamine (PDA).…”

Recent Desalination Technologies by Hybridization and Integration with Reverse Osmosis: A Review

“…Research is focused on mixed RO membranes. Doping and functionalization with organic and inorganic nanoparticles will allow to obtain membranes resistant to extreme conditions such as elevated levels of acidity [127], surface coatings [128], in-situ surface modification [129], incorporation of two-dimensional materials [130], and preparation of grafts [128] and others. Design with hydrophobic or highly branched molecules, together with advances in nanomaterials such as carbon and graphene nanotubes [130], silver nanoparticles, nano clays, and molecular sieves promise a wide range of possibilities for membrane use in RO applications [16].…”

Eco-Friendly Fluorine Functionalized Superhydrophobic/Superoleophilic Zeolitic Imidazolate Frameworks–Based Composite for Continuous Oil–Water Separation

“…From a magnified view ( Figure 1 g), a thin PDA layer was produced on the smooth strut surface. In addition, many particles were attached to the surface, most likely as a result of the self-assembly of superfluous polydopamine aggregations [ 45 , 52 ]. In contrast to the surface of raw MF or PDA-MF, ZIF-90@PDA-MF exhibited a highly rough surface ( Figure 1 d,h).…”