Surface Modification of TFC-PA RO Membrane by Grafting Hydrophilic pH Switchable Poly(Acrylic Acid) Brushes

Scheme 1

Growth of polymer brushes on the membrane surface (a). Representation of the surface modification of the membrane (b), with reactions showing (A) functionalization of TFC-PA by APTMS, (B) initiator attachment over APTMS-functionalized TFC-PA, (C) growth of P(t-BA), and (D) hydrolysis of PA-g-P(t-BA) to PA-g-PAA.

(a)

(b)