Preparation of temperature stimuli-responsive poly (N- isopropyl acrylamide) / graphene oxide composite hydrogel nanofibers

Poly [N-isopropylacrylamide-co- (acrylic acid)], poly(NIPAM-co-AA), was synthesized by radical polymerization in an aqueous solution. Poly(NIPAM-co-AA)-graphene oxide composite hydrogel nanofibrous mat were fabricated by electrospinning using DMF/ethanol as solvent. The electrospun nanofibers were cross-linked using poly vinyl alcohol as cross-linker, followed by a heat-induced esterification reaction at different temperatures and times. The average diameter of electrospun fibers was determined through the scanning electron microscopy. The hydrogel membranes exhibited a temperature sensitive property. Their minimum and maximum water absorption ratios were measured at (30-45°C). Equilibrium swelling state of the electrospun membranes was also investigated

کلیدواژه ها:

hydrogel ، electrospinning ، nanofiber ، poly(N-isopropylacrylamide) ، graphene oxide