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J Cohen

Publications and source records attributed to J Cohen.

At least 433 records · Page 24Linked to original sources
PubMed1997

Adsorption Isotherms of Bitumen/Aqueous Solutions of Intan-100

Adsorption isotherms for pure bitumen/aqueous solution of the non-ionic surfactant Intan-100 have been determined as a function of temperature using enhanced video pendant drop technique. The area/molecule occupied by the surfactant at the bitumen/water interface is about 3 times higher at 30°C than at 60°C at which maximum packing occurs. Isotherms for the model system heptane/aqueous solutions of Intan-100 indicate that maximum packing is not possible in the temperature range 20-60°C. This fact implies that bitumen/water interface is a unique system where the natural surfactant present in the bitumen is playing a competitive role at the interface.

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