Preparation of carbonaceous spheres from suspensions of pitch materials

Seong-Ho Yoon, Yang Duk Park, Isao Mochida

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Carbonaceous spheres were prepared from mesophase pitch, isotropic pitch and fractioned portions of mesophase pitch. The sequential procedure is: suspension in lean suspension medium, removal of dissolving solvent, filteration and oxidative stabilization. The shapes of spheres obtained depended on the type of solvent, suspension agent and suspension medium. The carbonaceous spheres prepared from THF soluble fractions (THFS) exhibited relatively narrow distributions of sizes and perfect spheres in shape. The size of spheres could be controlled by the concentration of the soluble fraction of pitch in solution. The spheres prepared from the quinoline-soluble fractions (QS) were reduced in size compared with those from THFS and flake-like materials appeared due to the aggregation of spheres upon the removal of quinoline. A specific polymeric suspension agent, polyvinylalcohol (PVA), was stable up to 290°C and was employed as a surface active agent in the suspension medium of glycerine.

Original languageEnglish
Pages (from-to)781-786
Number of pages6
JournalCarbon
Volume30
Issue number5
DOIs
Publication statusPublished - Jan 1 1992

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Suspensions
Glycerol
Surface-Active Agents
Surface active agents
Agglomeration
Stabilization

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Preparation of carbonaceous spheres from suspensions of pitch materials. / Yoon, Seong-Ho; Park, Yang Duk; Mochida, Isao.

In: Carbon, Vol. 30, No. 5, 01.01.1992, p. 781-786.

Research output: Contribution to journalArticle

Yoon, Seong-Ho ; Park, Yang Duk ; Mochida, Isao. / Preparation of carbonaceous spheres from suspensions of pitch materials. In: Carbon. 1992 ; Vol. 30, No. 5. pp. 781-786.
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