Efficient preparation of mesocarbon microbeads by pyrolysis of coal-tar pitch in the presence of rosin

Yang, Youjie; Lin, Qilang; Huang, Yunqing; Guo, Danyu

doi:10.1016/j.jaap.2011.03.005

Cited by 27 publications

(6 citation statements)

References 27 publications

(31 reference statements)

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“…The thermal decomposition of CMS, TETP, and CMS@TETP was analyzed by TG test (Figure 4), and the relative data including T 5% (the temperature at 5.0 wt% mass loss), T max (the temperature at the maximum mass‐loss rate), and the residue at 800°C are listed in Table 2. As for CMS, the degradation before 150°C is due to the physically absorbed water, and the weight‐loss stage after 200°C is ascribed to the dehydration, transformation, or crosslinking of the functional groups on graphitic carbons 44 . The degradation stages of TETP include the removal of crystal water (<250°C), the degradations of CP and CN backbones (250‐450°C), and the degradation of phosphorus derivatives (>450°C) 34 .…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of carbon microspheres/tin ethylenediamine tetramethylene phosphonate hybrid for improving the mechanical, flame‐retardant, and thermal properties of epoxy resin

Wang

2021

Polymers for Advanced Techs

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A botryoidal carbon microspheres/tin ethylenediamine tetramethylene phosphonate hybrid (CMS@TETP) was fabricated via a self‐assembly method and was applied to modify epoxy resin (EP) in order to simultaneously improve its mechanical, flame‐retardant, and thermal properties. The mechanical tests' results show that the addition of 1.0 wt% CMS@TETP endows EP with an increase in tensile and impact strengths of 24.4% and 23.1%, respectively, relative to the values of pure EP. The cone calorimeter test results reveal that CMS@TETP has better flame retardancy in EP than either CMS or TETP at the same loading level. In comparison with those of pure EP, the mean heat release rate, peak heat release rate, total heat release, and effective heat of combustion of the EP composite containing 3.0 wt% CMS@TETP (EP/CMS@TETP‐3) are respectively reduced by 49.5%, 59.1%, 47.0%, and 46.1%. The glass transition temperatures of EP/CMS@TETP composites are slightly increased than that of pure EP, indicating an increase in the thermal resistance. Thermogravimetric analysis results provide evidence that CMS@TETP has good char‐forming capacity in EP.

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Section: Resultsmentioning

confidence: 99%

Facile synthesis of carbon microspheres/tin ethylenediamine tetramethylene phosphonate hybrid for improving the mechanical, flame‐retardant, and thermal properties of epoxy resin

Wang

2021

Polymers for Advanced Techs

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“…The explanation of sizes changes of MCMBs may be as follows. On one hand, DCLR-P is used as a nucleating agent to promote the formation of MCMBs (Yang et al 2011). On the other hand, DCLR-P also may reduce the system viscosity because DCLR-P has more aliphatic structure than CTP (Song et al 1992).…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Mechanisms and characteristics of mesocarbon microbeads prepared by co-carbonization of coal tar pitch and direct coal liquefaction residue

Yan

Wang

2019

Int J Coal Sci Technol

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DCLR-P was prepared by direct coal liquefaction residue (DCLR) with ash removal. In the present experiments, mesocarbon microbeads (MCMBs) were prepared by co-carbonization of coal tar pitch (CTP) and DCLR-P. With the increase of DCLR-P content, the yield of MCMBs increased from 47.8% to 56.8%. At the same time, the particle sizes distribution of MCMBs was narrowed, resulting in the decrease of D 90 /D 10 ratio from 154.88 to 6.53. The results showed that DCLR-P had a positive effect on the preparation of MCMBs. 1 H-NMR, FTIR, SEM and XRD were used to analyze the mechanisms and characteristics of MCMBs prepared by co-carbonization of CTP and DCLR-P. The results showed that the Proton Donor Quality Index (PDQI) of DCLR-P was 13.32, significantly higher than that of CTP (0.83). This indicated that DCLR-P had more naphthenic structure than CTP, which leads to hydrogen transferring in polycondensation reaction. The aliphatic structure of DCLR-P can improve the solubility and fusibility of mesophase, thereby making the structure of MCMBs more structured. The microstructure of the graphitized MCMBs had a substantially parallel carbon layer useful for its electrical performance. The performance of graphitized MCMBs as a negative electrode material for Li-ion batteries was tested. The particle sizes, tap density, specific surface area and initial charge-discharge efficiency of graphitized MCMBs met the requirements of CMB-I in GB/T-24533-2009. However, the initial discharge capacity of graphitized MCMB was only 296.3 mA h g-1 due to the low degree of graphitization of MCMBs.

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“…For example, CP can be used to produce needle coke, carbon bers, mesocarbon microbeads and carbon foam. [13][14][15][16] In recent years, there has been growing interest in the application of porous carbons in the elds of gas storage and EDLC. 17,18 However, preparation of pitch-based HPCs oen requires templates or supports, such as mesoporous silica, metal oxides or silicon wafer that caps a metallic layer.…”

Section: Introductionmentioning

confidence: 99%

Dicarbonyl-tuned microstructures of hierarchical porous carbons derived from coal-tar pitch for supercapacitor electrodes

et al. 2019

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Efficient preparation of mesocarbon microbeads by pyrolysis of coal-tar pitch in the presence of rosin

Cited by 27 publications

References 27 publications

Facile synthesis of carbon microspheres/tin ethylenediamine tetramethylene phosphonate hybrid for improving the mechanical, flame‐retardant, and thermal properties of epoxy resin

Facile synthesis of carbon microspheres/tin ethylenediamine tetramethylene phosphonate hybrid for improving the mechanical, flame‐retardant, and thermal properties of epoxy resin

Mechanisms and characteristics of mesocarbon microbeads prepared by co-carbonization of coal tar pitch and direct coal liquefaction residue

Dicarbonyl-tuned microstructures of hierarchical porous carbons derived from coal-tar pitch for supercapacitor electrodes

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