title: Sodium alginate/graphene oxide composite films with enhanced thermal and mechanical properties.
abstract: Sodium alginate/graphene oxide (Al/GO) nanocomposite films with different loading levels of graphene oxide were prepared by casting from a suspension of the two components. The structure, morphologies and properties of Al/GO films were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning (SEM) and transmission electron microscopy (TEM), thermal gravimetric (TG) analysis, and tensile tests. The results revealed that hydrogen bonding and high interfacial adhesion between GO filler and Al matrix significantly changed thermal stability and mechanical properties of the nanocomposite films. The tensile strength (σ) and Young's modulus (E) of Al films containing 6 wt% GO increased from 71 MPa and 0.85 GPa to 113 MPa and 4.18 GPa, respectively. In addition, TG analysis showed that the thermal stability of Al/GO composite films was better than that of neat Al film.
authors.affiliation: University Politehnica of Bucharest, Advanced Polymer Materials Group, 132 Calea Grivitei, 010737, Bucharest, Romania.
authors.forename: Mariana
authors.initials: M
authors.lastname: Ionita
authors.forename: Madalina Andreea
authors.initials: MA
authors.lastname: Pandele
authors.forename: Horia
authors.initials: H
authors.lastname: Iovu
mesh_terms: D000464:Alginates / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D055119:Elastic Modulus; D006108:Graphite / Q000737:chemistry*; D006860:Hydrogen Bonding; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008969:Molecular Sequence Data; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D013010:Sonication; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013718:Tensile Strength; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000464:Alginates; D001672:Biocompatible Materials; D010087:Oxides; D006108:Graphite