Mixed matrix microporous hollow fibers with ion-exchange functionality

Dual-layer polyethersulfone (PES)/BTDA-TDI/MDI co-polyimide (P84) hollow fiber membranes with a submicron PES–zeolite beta mixed matrix dense-selective layer for gas separation

“…Therefore, it will be a great development if applying this type of promising polymer-based organic-inorganic composite materials with the configuration of hollow fibers for gas separation. Some pioneering progresses have been made [25][26][27][28][29][30]. The asymmetric hollow fiber membrane is composed of a dense selective layer and a porous supporting layer, and its gas separation performance is mainly determined by the dense selective layer.…”

Improving the fouling resistance of brackish water membranes via surface modification with graphene oxide functionalized chitosan

“…Several methods have been suggested recently to improve fouling resistance of RO membranes, comprising the utilization of new monomers, development of fabrication methodology and RO membrane surface modification through chemical and physical methods [13]. Nowadays, with the nanotechnology innovation, several porous nano-materials were applied in the modification of RO membranes, i.e., zeolite [14][15][16][17][18][19] and carbon nanotubes (CNTs) [20][21][22][23][24][25].…”

Improving ion-exchange membrane properties by the role of nanoparticles

“…Subsequently, to remove the solvent, the synthesized membrane can be either dried at room temperature, immersed in a coagulation bath containing non-solvent, or treated through combined method wherein the drying period is set [24]. This method has also been applied to fabricate hollow fiber IEM [30]. Since the polymer binder is inert and the cationic or anionic moieties are on the ion-exchange particles, thus these functional groups are distributed unevenly yet clustered.…”