Self-Organization and Sorption Properties in Relation to Lanthanum Ions of Polyacrylic Acid and Poly-2-Methyl-5-Vinylpyridine Hydrogels in Intergel System
Hydrogels mutual activation was studied in aqueous solutions, particularly dependencies of the swelling coefficient, specific electric conductivity, and pH of aqueous solutions from hydrogels molar ratios in time were studied. Maximum activation of hydrogels occurs at gPAA:gP2M5VP = 5:1 and 4:2 ratio. Lanthanum ions sorption by intergel system polyacrylic acid hydrogel (gPAA)—poly-2-methyl-5-vinylpyridine hydrogel (gP2M5VP) was studied. Maximum sorption degree of the intergel system is observed at gPAA: gP2M5VP = 4:2 ratio, it is 91.09%, this is higher comparatively with individual hydrogels of gPAA and gP2M5VP (67.71% and 63.65%, respectively). At this hydrogels ratio polymer chain total binding degree is 75.83%, it is much higher than polymer chain binding degree of the initial hydrogels: binding degree of gPAA is 56.50%, of gP2M5VP is 53.00%. Desorption degree lanthanum ions by ethyl alcohol is 80.17%, by nitric acid—92.55%. Obtained results indicate that at gPAA:gP2M5VP = 4:2 ratio in intergel system there is a significant change of electrochemical, conformational, and sorption properties of the initial macromolecules.