Fabrication of PES nanofiltration membrane by simultaneous use of multi-walled carbon nanotube and surface graft polymerization method: Comparison of MWCNT and PAA modified MWCNT

Preparation of Chitosan-Multiwalled Carbon Nanotubes Blended Membranes: Characterization And Performance in The Separation of Sodium and Magnesium Ions

“…Due to some limitations, we could not find the active surface charge of the membrane. However, the prepared CS-MWCNT membranes with different concentrations of MWCNT showed the same trend as reported in the literature for negatively charged membranes [61][62][63][64]. The decreasing nature of the solute rejection ( Figure 8) with increasing feed concentration reflects the negative charge of the active surface on the membrane.…”

PES mixed matrix nanofiltration membrane embedded with polymer wrapped MWCNT: Fabrication and performance optimization in dye removal by RSM

“…For instance, for the highest concentrated feed (1000 mg/L), dye removal is the highest value at pH 3.0 and the lowest at neutral pH (around 6.0) while it rises again at basic media. According to surface pore size of NF membranes and also adsorption capability of CNTs (as an additive) [46], there is a combination of electrostatic interaction, sieving and adsorption mechanisms affecting on dye removal [2]. In fact, the different values of dye removal in various pH refer to the charge of additives and dye molecules in each feed solution with different concentration of proton.…”

“…They modified acid functionalized MWCNTs using three hydrophilic polymers (CA, AA, and AAm) [33]. Introducing low amounts of polymer modified MWCNT into membrane matrix led to further improvement of membrane characteristics because of higher compatibility with membrane bulk polymer [46]. Considering the variety of available polymers, it would be an efficient idea if a modifier polymer with approximately similar chemical structure with polymer matrix along with hydrophilic properties is employed for modification of CNTs.…”

Preparation and characterization of PEG-g-MWCNTs/PSf nano-hybrid membranes with hydrophilicity and antifouling properties

“…16 With unique properties such as excellent mechanical properties, high surface area and good hydrophilicity, CNTs has become the ideal component for reinforcing mechanical properties and increasing the porosities of composite membranes. 24 Results showed that PAA modied MWCNTs/ PES membrane had more efficient salt rejection and better antifouling properties. 19,20 Thus, chemical surface modication is a favorite application to improve the dispersion ability of CNTs to fabricate a homogeneous nanocomposite membrane.…”