A New Approach To Design Imprinted Polymer Gels without Using a Template

摘要: With the aim of developing polymeric gels sensitive to external stimuli and able reversibly adsorb release divalent ions, we prepared copolymer N-isopropylacrylamide (NIPA) N,N′-cystaminebis(acrylamide) (BAC) weakly cross-linked with N,N′-methylenebis(acrylamide) (BIS). After polymerization, -S-S-bonds BAC mers were broken oxidized form pairs sulfonic groups. The juxtaposition two anionic groups favors interaction a cation. Calcium adsorption experiments showed that in this way memorized position after swelling reshrinking. This "imprinting" effect was tested for several concentrations adsorbing permanent cross-linkers. control 2-acrylamido-2-methyl-propanesulfonic acid (AMPS), where randomly distributed, difficulty forming pairs. Their affinity calcium ions decayed exponentially as function cross-linker concentration. In contrast, imprinted much greater than random did not decrease BIS, showing memorization has been achieved.