K. Esumi et al., PREPARATION OF HOLLOW CARBON-MICROBEADS FROM WATER-IN-OIL EMULSION USING AMPHIPHILIC CARBONACEOUS MATERIAL, Colloids and surfaces. A, Physicochemical and engineering aspects, 108(1), 1996, pp. 113-116
Carbon microbeads were prepared from water-in-oil emulsion using amphi
philic carbonaceous material and urea. With urea as a forming agent wi
th a concentration 1-20 wt.%, hollow carbon-microbeads were obtained,
and their particle size ranged between 2 and 15 mu m. The true density
of the hollow carbon-microbeads was changed, by varying the concentra
tion of urea and the heat-treatment temperature. In particular, a pore
size of about 50 Angstrom was predominantly produced under a certain
condition.