Monolayers of desasphalted oil, asphalts C5 and asphaltene C7 were studied using pressure-area (π - A) isotherms. The asphalt(ene)s studied form stable monolayers at the air/water interface, indicating that the hydrophilic head group and hydrophobic tail are in the correct balance. Molecular weights determined by extrapolating the curves of πA versus π to π → 0were compared with molecular weights obtained from vapour pressure osmometry.
- surface properties
ASJC Scopus subject areas
- Organic Chemistry
- Energy Engineering and Power Technology
- Fuel Technology