Thermo-responsive smart gels for sensors and controlled coloring

In the present study, temperature-responsive polymers with upper critical solution temperature(UCST) behavior were synthesized based on poly(acrylamide-acrylonitrile). Using the inverseemulsion polymerization method and bis-acrylamide crosslinker, microgels with UCST behaviorwere prepared. The transmittance of these microgel dispersions in an aqueous medium was measuredusing ultraviolet-visible spectroscopy (UV-Vis) analysis with temperature sweep. After loading themethylene blue dye in the microgels, its released concentration was measured at two temperatures of۵ and ۴۰ ℃. The results showed that the rate of release increases with increasing temperature and therate of release decreases with increasing the amount of crosslink density. These gels can be used astemperature sensors or for controlled release of dyes.

کلیدواژه ها:

Smart polymer ، Responsive gels ، Methylene blue.