Graphene-containing thermoresponsive nanocomposite hydrogels of poly(N-isopropylacrylamide) prepared by frontal polymerization

摘要: Frontal polymerization has been successfully used to synthesize poly(N-isopropylacrylamide) nanocomposite hydrogels containing graphene. The latter was directly achieved by ultrasound treatment of a dispersion graphite in N-methylpyrrolidone. dispersion, having the concentration 2.21 g L−1, characterized TEM analysis and mixed with suitable amounts N-isopropylacrylamide for synthesis graphene-containing polymer hydrogels. were analyzed SEM Raman spectroscopy, their swelling rheological properties investigated. It found that graphene strongly influences ratio, dramatically increasing it, even if present small amounts. Finally, correlated content: G′ modulus complex viscosity increase nanofiller concentration, thus indicating occurrence good interactions between two phases. Nevertheless, at high (i.e., 0.13 wt.%), showed lubrication effect, lowering parameters approaching same pseudoplastic behaviour unfilled material.