Efficient preparation of meso-carbon microbeads from synthetic isotropic pitch derived from naphthalene

✍ Scribed by Y. Korai; S. Ishida; S.-H. Yoon; Y.-G. Wang; I. Mochida; Y. Nakagawa; Y. Matsumura; Y. Sakai; M. Komatu

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 726 KB
• Volume: 34
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/s0008-6223(96)00114-5

✦ Synopsis

An efficient preparation

of mesophase spheres was attempted from synthetic isotropic pitches of naphthalene oligomers. A large number of spheres of rather uniform diameter were obtained by the carbonization at 380°C for 20 h. Volumetric and yields of spheres in the pitch were volumetrically measured under the optical microscope and extracted, a pyridine soluble fraction as high as 42 ~01% and 15 wt%, respectively was reached. Such a difference in the yields suggests that the spheres prepared in the present study included a significant amount of the pyridine soluble fraction. The extracted sphere carried a number of pores, leaving rod-like units. Self-assembling units of pyridine insoluble fraction produced in the mesophase are suggested to be precipitated to form a spherical shape.