Exfoliated graphite images

Macropores in exfoliated graphite, which can sorb up to 80 g of heavy oil per 1 g of exfoliated graphite [86], were analyzed with the aid of image analysis [150], An example of a histogram for the cross-sectional area of macropores formed in worm-like particles is shown in Figure 2.20d. 

Figure 27.1 Scanning electron microscope (SEM) images of exfoliated graphite.

Fig. 11.8 FESEM images of nanocomposite-based polyethylene terephthalate (FETl/polypropy-lene (PP)/exfoliated graphite nanoplatelets (GNP) [PET/PP/GNP] nanocomposites at 3 phr showing a GNPO, b GNP3, showing the uniform dispersion of GNP3, and c GNP3, showing the attachment of GNP particles on the compatibilizer surface [31]...

Figure 7.38 TEM images of exfoliated graphite oxide nanoplatelets in DMF. Reproduced from Ref [50] with permission.

The results of the very high sorption capacity of exfoliated graphites promoted detailed studies on the characterization of their pore structure using newly developed techniques such as image analysis [54-62], Previously in this series. 

FIGURE 4.2 SEM images of exfoliated graphite, (a) Wormlike particles and large spaces among them, (b) crevice-like pores on the surface of wormlike particles, and (c) pores inside of the particle (cleaved cross section). 

Large void spaces among wormlike particles were quantitatively evaluated by image analysis using thin slices prepared from an exfoliated graphite after impregnation with paraffin oil. To compare the volume of these large spaces with sorptivity, they were found to be responsible for about 70% of total heavy oil sorption capacity [58]. However, crevicelike pores on the surface of particles and the ellipsoidal pores inside the particles also have important roles in heavy oil... 

FIGURE 4.26 SEM images of the surface of wormlike particles of exfoliated graphite after sorption of heavy oil. (a) After sorption of A-grade heavy oil, (h) after recovering hy suction filtration, (c) after sorption of C-grade heavy oil, and (d) after suction filtration. 

Graphite (a) molecular structure and (b) SEM micrographs after exfoliation. (Figure 12.5b reproduced from website www.electronics-cooling.com/assets/images/, February 2007 Inagaki, M., and Suwa, T., Carbon, 39, 915-920,2001. With permission.)... 

Fig. 1 TEM images of graphene obtained by (a) reductive pyrolysis of camphor (CG), (b) thermal exfoliation of graphitic oxide (EG), (c) thermal conversion of nanodiamond to grapbene (DG) and (d) arc evaporation of SiC (SG),...

Strings are thin graphite stripes that are removed by exfoliation from steps and attached to another step [16], The three threads shown in Fig. 20.3(b) that covered the entire image are 66 nm large and about 2.8 nm wide. 

Figure 20.6 Ex situ atomic force microscopy (AFM) image that shows island-Uke pieces produced on highly oriented pyrolytic graphite (HOPG) hy step rupture from the exfoliation procedure.

Functionalized GNS by surface epoxy, hydroxyl, and carboxyl groups are synthesized through simple synthesis processes. These processes include the chemical oxidation of common graphite to graphite oxide and the subsequent thermal exfoliation of the GO to GNS [165, 179]. Figure 13.28 shows an illustration of the synthetic route used to obtain the GNSs and their SEM images [180]. 

Fig. 13.28 The SEM image of graphite shows a bulky and spherical shape. After the ehemical oxidation and thermal exfoliation (S.M. Choi, M.H. Seo, H.J. Kim, W.B. Kim, Carhon 49 (2011) 904-909, reproduced with permission from Elsevier) [167]...

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