Study On The Structure And Properties Of Functionalized Graphene Oxide Polymer N Anocomposites

In the field of polymer composites, polymer/nanofillers composites have attracted substantial interest because nanofillers incorporated in the polymer matrices can enhance the interfacial interaction and then improve their mechanical properties, thermal stability and other properties such as flame retardant, electrical conductivity, barrier properties, etc. Unfortunately, it is difficult to obtain a good dispersion in polymer matrixes, resulting in serious phase separation and worse interfacial adhesion. In order to improve the compatibility between polymer matrices and nanofillers, the surface of nanofillers can be functionalized special groups. Therefore, we synthesized graphene oxide derivatives by surface functionalization to obtain the high performance polymer products.Firstly,The aim of this study was to improve the miscibility between fillers and polymer through modifying the face of graphene oxide (GO). In order to compare the effects of GO and modified graphene oxide(MGO) to sodium alginate(SA), sodium alginate/graphene oxide (SA/GO-n) and sodium alginate/modified graphene oxide (SA/MGO-n) biocomposite films were prepared, then the interaction between nanofillers and matrix was evaluated. The structure, morphologies and properties of biocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), Atomic force microscopy (AFM), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Ultraviolet-visible (UV-vis), scanning electron microscopy (SEM) and mechanical tests. The results revealed that strong interactions existed between GO(MGO) and SA. Compared with neat SA film, the maximum level of Young’s moduli (E), tensile strength (σb) and elongation at break (εb) of the SA/MGO biocomposites improved by 37.8%,68.4% and 44.9%, while that of the SA/GO biocomposites improved by 19.6%,44%, and 36.5%.Secondly, the aim of this study was to reduce flammability of polypropylene (PP) by adding organic nano-sized flame retardant into PP matrix. In order to compare the effects of N-containing organophosphate and graphene oxide decorated N-containing organophosphate to PP,polypropylene/Zirconium 2-(2-(2-aminoethylamino)ethylamino) ethylphosphonate (PP/-Zr(AE)3P) and polypropylene/GO-decorated Zirconium 2-(2-(2-aminoethylamino)ethylamino) ethylphosphonate (PP/GO-Zr(AE)3P) nanocomposite films were prepared, then the flame resistance of nanocomposites was evaluated. The structure, morphologies and properties of nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), vertical flame and mechanical tests. The results revealed that both of the addition Zr(AE)3P and GO-Zr(AE)3P can improve the flame resistance of PP and GO-decorated GO-Zr(AE)3P exhibited more prestige.Lastly, we synthesized a series of graphene oxide decorated N-containing organophosphate flame retardants and a series of polypropylene/GO-decorated Zirconium 2-(2-(2-aminoethylamino)ethylamino) ethylphosphonate nanocomposite (PP/GO-Zr(AE)3P), polypropylene/GO-decorated Zirconium a series of 1,3,5-triazine-2,4-diamine-6-secondary amine ethylphosphonic zirconium nanocomposite(PP/GO-ZrMelP), polypropylene/GO-decorated benzoic acid-N, N-dimethyl acid zirconium nanocomposite (PP/GO-ZrBMP), then the flame resistance of nanocomposites was evaluated. The structure, morphologies and properties of nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and vertical flame. The results revealed that the addition GO-Zr(AE)3P, GO-ZrMelP and GO-ZrBMP can improve the flame resistance of PP.