A free-standing calcium alginate/polyacrylamide hydrogel nanofiltration membrane with high anti-fouling performance: Preparation and characterization

Preparation and characterization of carboxyl multi-walled carbon nanotubes/calcium alginate composite hydrogel nano-filtration membrane

“…Nano-filtration membrane separation technology has been used to remove heavy metal ions, nanoparticles and dye molecules from wastewater [1][2][3]. However, the interactions between the relatively hydrophobic membrane and organic compounds in water result in the generation of irreversible fouling, which reduces the reliability of membrane filtration equipment and seriously limits its further development [4].…”

Calcium alginate hydrogel filtration membrane with excellent anti-fouling property and controlled separation performance

“…4. The strong band at 3466 cm À 1 was assigned to the stretching vibration of -OH in NaAlg [22]. The strong bands at 1670 and 1415 cm À 1 were assigned to the antisymmetric and symmetric COO À stretching vibration of the salified carboxyl group in NaAlg, which was corresponding to the bands at 1697 and 1406 cm À 1 in CaAlg, respectively [29].…”

“…Dong et al [21] prepared polyvinyl alcoholNaAlg blend composite membrane coated on polysulfone hollow fiber ultrafiltration membrane for pervaporation dehydration. In our previous work, calcium alginate/polyacrylamide hydrogel filtration membrane was synthesized using acrylamide as monomer, sodium alginate as matrix, urea as pore-forming agent, N,N 0 -methylene-bisacrylamide as covalent crosslinker, and CaCl 2 as ionic crosslinker [22]. The hydrogel filtration membrane showed excellent anti-fouling performance.…”

Hydrophilic nanofibrous composite membrane prepared by melt-blending extrusion for effective separation of oil/water emulsion

“…The results was consistent with the previous literature that the membrane ltration ux increased linear with low pressure, low liquid concentration or high ow rate. [42][43][44] In addition, as the NCC content increased in a range, the inuence of the pressure on the pure water ux of the composite membrane was gradually decreased. It was because that the pure water ux of the composite membrane was determined by operation pressure and water wettability.…”