Fabrication of graphite/MgO-reinforced poly(vinyl chloride) composites by mechanical activation with enhanced thermal properties

Li, Qinghua; Shen, Fang; Ji, Jingqi; Zhang, Yanjuan; Muhammad, Yaseen; Huang, Zuqiang; Hu, Huayu; Zhu, Yunpeng; Qin, Yuben

doi:10.1039/c8ra09384a

Cited by 9 publications

(6 citation statements)

References 41 publications

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“…Deconvolution of high-resolution O 1s spectra showed three oxygen-containing functional groups, namely, carbonyl oxygen atoms (CO, 532.7, 531.4, and 532.7 eV for graphite, N-doped graphite, and O-doped G, respectively), noncarbonyl oxygen atoms (C–OH, 534.8, 534.3, and 534.6 eV for graphite, N-doped graphite, and O-doped G, respectively) and oxygen atoms in carboxylic groups (COOH, 533.3 eV for O-doped G) (Figure S3d). − Oxygenation and nitrogenation of the carbon scaffold in O-doped G and N-doped G caused an increase in the full width at half-maximum (FWHM) of their C 1s spectrum, indicating the presence of a greater amount of disorder in the carbon sp 2 network. It should be mentioned that the presence of O 1s distinct peak in the XPS spectra of graphite and N-doped G in Figure S3a is attributed to the adsorption of ambient water and oxygen by the samples and also slight oxidation of samples by oxygen when handled under the ambient conditions.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Application of Heteroatom-Doped Graphite as the Electrode Material: Influences of Defect Density and Heteroatom on Heterogeneous Electron Transfer Rate

Ashrafi

Akhond

Haghighi

2022

ACS Appl. Electron. Mater.

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Thermal method was applied for the synthesis of Odoped and N-doped graphite materials using melamine and glucose as the sources of O and N, respectively. Graphite paste electrodes were prepared with the synthesized O-doped and N-doped graphite materials. The route of synthesis was explored by cyclic voltammetry using the fabricated paste electrodes and [Fe-(CN) 6 ] 3−/4− as a simple outer-sphere redox probe. The results of structural and electrochemical investigations clearly showed that doping of O and N as heteroatom in the synthesized materials not only increased the defect density, the ratio of edge to basal plane sites, of graphite materials but also enhanced the rate of heterogeneous electron transfer at their corresponding paste electrodes. The heterogeneous electron transfer rate constant (k 0 ) for [Fe(CN) 6 ] 3−/4− at the fabricated O-doped and N-doped graphite paste electrodes were about 51 and 46 times that observed for graphite paste electrode, respectively. The values of electroactive surface area calculated for both O-doped and N-doped graphite materials were about 5 times that obtained for graphite paste electrode. Thereafter, electrochemical behaviors of isoniazid, ascorbic acid, dopamine, and uric acid as the models of biologically relevant molecules were investigated at the prepared heteroatom-doped graphite paste electrodes, and the obtained results were compared with those obtained using paste electrodes prepared by pristine graphite, pristine multiwalled carbon nanotubes, and oxidized multiwalled carbon nanotubes and also by glassy carbon electrode.

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Section: Resultsmentioning

confidence: 99%

“…However, the values of R ct for O-doped GPE and N-doped GPE were about 654 and 897 Ω, respectively. The superior charge transfer rate at O-doped GPE and N-doped GPE compared to GPE and CGPE can be attributed to the increase of edge plane sites density or the increase of defect density and the surface chemistry of electrode materials. ,,− …”

Section: Resultsmentioning

confidence: 99%

Synthesis and Application of Heteroatom-Doped Graphite as the Electrode Material: Influences of Defect Density and Heteroatom on Heterogeneous Electron Transfer Rate

Ashrafi

Akhond

Haghighi

2022

ACS Appl. Electron. Mater.

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“…Previous studies support these results. For instance, Qi et al [ 4 ] found that the melting temperature range of HDPE is 121.2–151.3 °C, and Li et al [ 29 ] confirmed that PVC exhibited an exothermic peak at 82.8 °C. The VPC could not support a high load when the thermoplastics were completely melted.…”

Section: Resultsmentioning

confidence: 99%

Effects of Coupling Agent and Thermoplastic on the Interfacial Bond Strength and the Mechanical Properties of Oriented Wood Strand–Thermoplastic Composites

Shen

Liu

et al. 2021

Polymers

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Wood–plastic composites (WPC) with good mechanical and physical properties are desirable products for manufacturers and customers, and interfacial bond strength is one of the most critical factors affecting WPC performance. To verify that a higher interfacial bond strength between wood and thermoplastics improves WPC performance, wood veneer–thermoplastic composites (VPC) and oriented strand–thermoplastic composites (OSPC) were fabricated using hot pressing. The effects of the coupling agent (KH550 or MDI) and the thermoplastic (LDPE, HDPE, PP, or PVC) on the interfacial bond strength of VPC, and the mechanical and physical properties of OSPC, were investigated. The results showed that coupling agents KH550 and MDI improved the interfacial bond strength between wood and thermoplastics under dry conditions. MDI was better than KH550 at improving the interfacial bond strength and the mechanical properties of OSPC. Better interfacial bonding between plastic and wood improved the OSPC performance. The OSPC fabricated using PVC film as the thermoplastic and MDI as the coupling agent displayed the highest mechanical properties, with a modulus of rupture of 91.9 MPa, a modulus of elasticity of 10.9 GPa, and a thickness swelling of 2.4%. PVC and MDI are recommended to fabricate WPCs with desirable performance for general applications.

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“…Figure shows the PXRD patterns of various catalysts, which suggest the corresponding peaks for Al 2 O 3 and participating metals in their respective oxidic phase, that is, NiO (37°, 44°, and 63°), MnO 2 (18°, 22°, 31°, 40°, 54°, and 60°), Co 3 O 4 (32°, 34°, and 47°), and Mo (36°, 47°, and 58°). − It is important to mention here that the vague and unclear nature of PRXD peaks in Figure could be concomitantly attributed to the highly powdered and ground nature of the catalysts and limitations of the XRD instrument (<5 wt % loadings of Mn, Co, and Ni). ,, However, a uniform morphological trend for all the catalysts was shown, which was due to a similar synthesis procedure, while the only difference arose in the variation of metallic species in different samples.…”

Section: Resultsmentioning

confidence: 99%

Studies on the Selection of a Catalyst–Oxidant System for the Energy-Efficient Desulfurization and Denitrogenation of Fuel Oil at Mild Operating Conditions

et al. 2019

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This study reports the selection of an ideal catalyst–oxidant system for the energy-efficient catalytic oxidative desulfurization (CODS) of dibenzothiophene (DBT) and denitrogenation (CODN) of pyridine over Mn–Co–Mo/Al2O3 and acid-functionalized 1-butyl-3-methyl imidazolium chloride ([Bmim]Cl/ZnCl2) ionic liquid (IL) catalysts using H2O2 and NaClO as oxidants. The NaClO–catalyst system realized 100% CODS/CODN activity within 15 min at 25 °C at comparatively low activation energies of 4.9 and 5.4 kJ/mol for DBT and pyridine, respectively, under optimal conditions of oxidant-to-sulfur ratio of 4, oxidant-to-nitrogen ratio of 8, ionic liquid-to-oil ratio of 1.5/5, and 0.1 g of Mn–Co–Mo/Al2O3 catalyst for 15 mL of model fuel. Both catalytic activity and kinetics results revealed a NaClO–catalyst system with greater efficiency and lesser energy requirements than a H2O2–catalyst system, and hence the former realized enhanced CODS and CODN than the latter. Furthermore, the Mn–Co–Mo/Al2O3 catalyst favored CODS, while [Bmim]Cl/ZnCl2 possessed greater affinity for the CODN process, owing to the stronger nucleophilic interaction of the cationic species in IL toward hindered nitrogen compounds. Further justification for the CODS and CODN activities and textural characterization of the fresh and spent catalysts were provided by PXRD, XPS, SEM, EDX elemental mapping, and BET surface area characterizations. Based on the results, this study is potentially viable owing to its environmental greenness, enhancement in the calorific value of the final fuel, and genially benignant application in energy consumption via mild operating conditions and hence can be envisaged as a practicable alternative approach in industrial processing of fuel oils.

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Fabrication of graphite/MgO-reinforced poly(vinyl chloride) composites by mechanical activation with enhanced thermal properties

Abstract: Fabrication of graphite/MgO reinforced poly(vinyl chloride) composites with enhanced thermal properties by mechanical activation.

Cited by 9 publications

References 41 publications

Synthesis and Application of Heteroatom-Doped Graphite as the Electrode Material: Influences of Defect Density and Heteroatom on Heterogeneous Electron Transfer Rate

Synthesis and Application of Heteroatom-Doped Graphite as the Electrode Material: Influences of Defect Density and Heteroatom on Heterogeneous Electron Transfer Rate

Effects of Coupling Agent and Thermoplastic on the Interfacial Bond Strength and the Mechanical Properties of Oriented Wood Strand–Thermoplastic Composites

Studies on the Selection of a Catalyst–Oxidant System for the Energy-Efficient Desulfurization and Denitrogenation of Fuel Oil at Mild Operating Conditions

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