Preparation of Mesocarbon Microbeads (MCMB) from Suspensions of a Synthetic Naphthalene Isotropic Pitch

A synthetic naphthalene isotropic pitch, which was manufactured with HF/BF3 acting as catalyst, was used as material to prepare mesocarbon microbeads (MCMB) through suspension method. The material pitch was dissolved in tetrahydrofuran (THF) and the pitch-THF solution is dispersed in a 2% polyvinyl...

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Bibliographic Details
Published in:Key engineering materials 2017-08, Vol.753, p.231-236
Main Authors: Zhao, Jian Hong, Bi, Qing Ling, Zhang, Miao, Wang, Lu Hai, Song, Cheng Ying, Cheng, Xiang Lin, Wang, Liu Cheng, Wang, Jian She, Ji, Sheng Juan
Format: Article
Language:English
Subjects:
Aqueous solutions
Carbonization
Electron microscopes
Nanoparticles
Naphthalene
Normal distribution
Oxidation
Particle size
Particle size distribution
Polyvinyl alcohol
Tetrahydrofuran
X-ray diffraction
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Summary:A synthetic naphthalene isotropic pitch, which was manufactured with HF/BF3 acting as catalyst, was used as material to prepare mesocarbon microbeads (MCMB) through suspension method. The material pitch was dissolved in tetrahydrofuran (THF) and the pitch-THF solution is dispersed in a 2% polyvinyl alcohol aqueous solution. After THF was volatilized, the solution was cooled and then filtered to attain little pitch sphere. The pitch spheres were oxidized in 65% HNO3 solution, and the oxidized pitch spheres were carbonized up to 1000°C to get MCMB. MCMB was analyzed by scanning electron microscope (SEM), laser particle size analyzer and X ray diffractometer. The result showed that the particle size of MCMB was 2-30 μm and the average particle diameter size of D50 was 15.83 μm. The particle size distribution accords to the normal distribution, and the particle size dispersion degree was 0.7574. The effect of 65% HNO3 oxidation of the pitch sphere showed a satisfactory result. After carbonization at 1000°C, the oxidized pitch sphere exhibited a better orientation arrangement, the distance between the aromatic plane (d002) was decreased, and the thickness of the piled plane is increased.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.753.231