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

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 of graphite in N-methylpyrrolidone

Valeria Alzari; Daniele Nuvoli; Sergio Scognamillo; Massimo Piccinini; Emilia Gioffredi; Giulio Malucelli; Salvatore Marceddu; Mario Sechi; Vanna Sanna; Alberto Mariani

2011

Scholarcy highlights

  • 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 of graphite in N-methylpyrrolidone
  • The nanocomposite hydrogels were analyzed by SEM and Raman spectroscopy, and their swelling and rheological properties were investigated
  • It was found that graphene strongly influences the swelling ratio, dramatically increasing it, even if present in small amounts
  • The rheological properties of the hydrogels were correlated with the graphene content: G′ modulus and complex viscosity were found to increase with increasing nanofiller concentration, indicating the occurrence of good interactions between the two phases
  • At a high concentration, graphene showed a lubrication effect, lowering the rheological parameters and approaching the same pseudoplastic behaviour of the unfilled material

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