The effects of pH, or surface chemistry and of porosity on the heterogeneity of immersed Saran carbons was investigated by film flotation. Even in the presence of methanol, higher pH values were found to enhance the surface hydrophilicity of carbons owing to the dissociation of oxygen functional groups. For carbons with similar oxygen contents, higher CO/CO2 evolution ratios (i.e., lower acidities) led to diminished pH effects, and to a more hydrophilic response at low pH values. Porosity only appears to affect the rate at which equilibrium flotation is attained.
|Original language||English (US)|
|Number of pages||2|
|Journal||Extended Abstracts and Program - Biennial Conference on Carbon|
|State||Published - Jan 1 1991|
|Event||20th Biennial Conference on Carbon - Santa Barbara, CA, USA|
Duration: Jun 23 1991 → Jun 28 1991
All Science Journal Classification (ASJC) codes