Stability study of polymer inclusion membranes (PIMs) based on acidic (D2EHPA), basic (Aliquat 336) and neutral (TOPO) carriers: effect of membrane composition and aqueous solution

Complexation-driven ion-exchange polymer inclusion membranes for separation of cobalt and nickel ions from lithium-ion via proton pumping

“…Various extractants are utilized, including bis(2,4,4trimethylpentyl) phosphinic acid (Cyanex 272), 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (PC-88A), di(2ethylhexyl)phosphoric acid (D2EHPA), and N,N-dioctyl-1octanamine (Alamine 336). [27][28][29] The plasticizer contributes to the membrane's effectiveness by lessening the intermolecular forces of the polymer, which increases exibility and permeability for better metal ion transport. 18,19 Common plasticizers include 2-nitrophenyl octyl ether (2-NPOE), 30,31 o-nitrophenyl pentyl ether (ONPPE), 32,33 and tris(2-ethylhexyl) phosphate (TEHP).…”