| 摘要 |
PROBLEM TO BE SOLVED: To provide the subject surface-modifying method capable of improving the wettability of a dispersing medium, a binder, etc., to a matrix by subjecting the surfaces of the carbonaceous particles to plural specific treatments. SOLUTION: This method for modifying the surfaces of the carbonaceous particles comprises subjecting the surfaces of the carbonaceous particles (e.g. carbon black) to a fluorine-containing gas treatment and subsequently to a steam-containing gas treatment. The fluorine gas-containing gas treatment preferably comprises bringing the fluorine-containing gas into contact with the surfaces of the carbonaceous particles at 0-50 deg.C for several see to 1hr. The steam-containing gas preferably comprises air and/or an inactive gas containing steam as saturated steam in a volume of 1-60vol.%. The fluorine- containing gas is preferably fluorine gas alone or its mixture with an inactive gas (e.g. nitrogen gas) and/or an O2 -containing gas. The treatment of the steam- containing gas is preferably performed at a flow rate of 50-1000ml/min and at a temperature of 150-350 deg.C for several min to several ten hr. |
