• 文献标题:   Dispersion of reduced graphene oxide within thermoplastic starch/poly (lactic acid) blends investigated by small-angle X-ray scattering
  • 文献类型:   Article
  • 作  者:   FERREIRA WH, DAHMOUCHE K, ANDRADE CT
  • 作者关键词:   graphene, smallangle xray scattering, electrical conductivity, capillary rheometry, dynamic mechanical analysi, biodegradation
  • 出版物名称:   CARBOHYDRATE POLYMERS
  • ISSN:   0144-8617 EI 1879-1344
  • 通讯作者地址:   Univ Fed Rio de Janeiro
  • 被引频次:   2
  • DOI:   10.1016/j.carbpol.2018.12.055
  • 出版年:   2019

▎ 摘  要

Reduced graphene oxide (rGO) was incorporated into plasticized cornstarch (TPS), poly(lactic acid) (PLA) and their blends. Small-angle X-ray scattering (SAXS) was used to investigate rGO dispersion within the materials. For the TPS/PLA blend at 70: 30 composition, the incorporation of rGO led to a larger fraction of small-sized rGO sheets, which at 5.0 mass% content developed stable fractal structures and domains of correlated sheets. The formation of fractal structures resulted in substantial enhancements in macroscopic properties. For these hybrids, the electrical conductivity, melt viscosity, storage moduli and biodegradation rates presented enhancements in relation to the neat blend. For the TPS/PLA blend at 30: 70 composition, S AXS results indicated the formation of smaller fractions of well-dispersed rGO sheets and of segregated larger rGO sheets. With rGO at 5 mass% content, less expressive increases in electrical conductivity, melt viscosity, storage moduli and biodegradation rates were observed.