Surface functionalization of PTFE membranes with hyperbranched poly(amidoamine) for the removal of Cu2+ ions from aqueous solution

A new functionalized membrane was fabricated by surface amination of PTFE membrane with hydrazine, followed by chemical coupling with the hydrophilic chelating agent hyperbranched poly(amidoamine) (HPAMAM). Coupling of HPAMAM to PTFE membranes greatly enhanced water flux without negatively affecting their rejection property as well as increasing its ability to remove Cu2+ ions in aqueous solution.250