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制备聚合物-石墨烯纳米复合材料的简易方法

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Reading report

Simple approach to prepare Polymer/Reduced Graphite Oxide composite

Routes to prepare Polymer/RGO composite

The reduction of GO

1. Chemical reduced with hydrazine hydrate, etc. 2. Heat treatment upon 1000 ℃ under protection of inert gases.

Before the blending with polymer

Figure 1. Image of the graphene oxide and nanocomposite: (a) the in situ reduced process for the single layer reduced-graphene oxide nanocomposite, (b) digital image of graphene oxide and in situ reduced-graphene oxide nanocomposite, (c) SEM image of graphene oxide, (d) AFM scan of the graphene oxide, (e) SEM images obtained from a fracture surface of PVDF, and (f) SEM images obtained from a fracture surface of composite samples of in situ reduced-graphene oxide nanocomposites.

Experimental method

GO
DMF GO/DMF PVDF PVDF/GO solution
Dried at 60 ℃

PVDF/RGO composite
Heat compressed at 200℃ for 2h

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PVDF/GO composite

Theoretical bases

Figure 2. Thermal analysis of GO powder: (a) TGA and DSC plot of graphene oxide and (b) the heating process in the TGA atmosphere

Reduction of GO

1. Remove many of the oxygen moieties from graphene oxide 2. Partially restore the sp2 hybridized structure and properties

Figure 3. (a) X-ray photoelectron spectroscopy analysis (b) IR analysis spectra indicating a substantial reduction in oxygen containing groups.

Excellent dispersion of RGO

Figure 4. TEM of nanocomposite: (a) TEM image of two overlapping reduced-graphene oxide sheet in nanocomposite

Electrical properties of PVDF/RGO composite

Figure 5. Dependence of (a) the conductivity, (b) relative dielectric permittivity, and (c) loss tangent of the graphene oxide/PVDF and reduced graphene oxide/PVDF nanocomposites on the reduced graphene volume fraction, fGO, measured at room temperature and 103 Hz. The inset in (a) and (b) show the best fits of the conductivity and the dielectric permittivity, respectively.

Similar route to prepare Polymer/RGO composites

temperature of the focused solar radiation can be as high as 200 ℃

Fig. 1 (a) Optical images of the PVDF and graphite oxide mixture with different concentrations, (b) homogeneous mixture of PVDF and GO after grinding, (c) a Magnascope with a 130 mm lens with schematic of natural SUN (source of power), the inset shows the black mixture containing PVDF along with graphene and (d) schematic representation of graphene and PVDF structures.

Fig. 5 (a–f) Field emission scanning electron micrographs of the 2.2 wt% reduced graphite oxide in the PVDF matrix

Fig. 7 (a) Electrical conductivity of the reduced graphite oxide (rGO) in PVDF with different weight fractions of rGO and (b) gauge factors of the corresponding composites with different weight fractions of rGO

What we can learn from them?

? Scientific insight ? the ability to analyze and solve problem ? The ability to construct an excellent paper




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