Preparation of Thin-Film Composite Membranes using Diblock TerpolymerNanospheres

Thin-film composite (TFC) membranes were prepared by coating porous polyacrylonitrile (PAN)membranes with a thin layer of diblock terpolymer nanospheres. The nanospheres were formed byself-assembly of poly(styrene-co-acrylonitrile)-block-poly(acrylic acid) SAN-b-PAA in a selectivesolvent. FE-SEM analysis confirmed the successful deposition of the SAN-b-PAA layer, whichresulted in a denser and more uniform pore structure on the top surface of the modified membrane.While the total porosity remained almost unchanged (۸۲±۱%), the water permeability decreased withthe modification of the pristine PAN membrane due to the reduction in the pore size of the top surface.Nonetheless, the water permeability of the TFC membranes was still high (۱۰۰ L/m۲.h.bar).

کلیدواژه ها:

TFC membranes ، Tailoring surface properties ، Diblock terpolymers ، Nanospheres