High-performance loose nanofiltration membrane prepared with assembly of covalently cross-linked polyethyleneimine-based polyelectrolytes for textile wastewater treatment

Synergistic Effect of Chitosan and Metal Oxide Additives on Improving the Organic and Biofouling Resistance of Polyethersulfone Ultrafiltration Membranes

“…The presence of chitosan and Ag 2 O in the PES membrane increased the cleaning rate of proteins attached to the surface of the membrane faster than the fouling rate formation by proteins . Thus, the modified membranes reduced fouling formation on the surface of the membrane and increased flux.…”

“…Direct mixing of additive macromolecules with the host membrane matrix to introduce their properties into the membrane polymer is one blending strategy. Some additives used in the blending technique are polyvinylpyrrolidone, , polyethylene glycol, , polyvinyl alcohol, , polyacrylic acid, , poly­(sodium 4-styrenesulfonate), polyethyleneimine, , Pluronics, and chitosan. , Kumar et al found that chitosan can improve membrane performance. Chitosan solution can be used as a surface coating for non-woven fabric membranes to improve their antifouling qualities and inhibit protein degradation in UF membranes via immersion or flow-through methods.…”

“…Direct mixing of additive macromolecules with the host membrane matrix to introduce their properties into the membrane polymer is one blending strategy. Some additives used in the blending technique are polyvinylpyrrolidone, 26 , 27 polyethylene glycol, 21 , 28 polyvinyl alcohol, 23 , 29 polyacrylic acid, 25 , 30 poly(sodium 4-styrenesulfonate), 24 polyethyleneimine, 31 , 32 Pluronics, 27 and chitosan. 22 , 33 Kumar et al 33 found that chitosan can improve membrane performance.…”

Surface characterization and Remazol Red adsorption by asymmetric polyethersulfone membranes modified by polyelectrolyte complexes

“…The micrographs in Figure 5 indicate that polymer aggregation led to the formation of a solid membrane with a dense top layer known as the “skin.” This skin introduces additional resistance to solvent and nonsolvent diffusion, creating an asymmetric membrane 48 . Furthermore, it is evident that the surfaces of the PES and Blend membranes were homogeneous and free of incrustation (Figure 5a,b, respectively), while the PEC membranes exhibited surface imperfections caused by the presence of PECs either adsorbed onto the surface 28,49 or due to their migration to the membrane's surface 37,41 . (Figure 5c–e).…”

Fabrication of Sodium Alginate/Polyethyleneimine/ Polyvinyl Alcohol Multilayer Composite Electrospun Nanofiber Membrane for Cu2+ Removal

“…Polyethyleneimine (PEI), also known as polyazacyclopropane, is a water-soluble macromolecule with the highest known cationic charge density among organic polymers. PEI excels in water treatment applications due to its dense amine groups-primary, secondary, and tertiary [22][23][24][25][26]. These groups facilitate the binding of heavy metal ions in wastewater through mechanisms like ionexchange, electrostatic interactions, chelation, and coordination, leading to high adsorption capacity.…”