反应详情

温度

60 °C

A mixed ethanolamine-potassium-sodium carboxylate viscoelastic surfactant system was formulated by reacting 10 grains of tallow acid (product T11 from Procter and Gamble) with 1.3 grams of ethanolamine in water in the presence of 40 grams of sodium stearate (Norac Inc.) and 40 grams of potassium carbonate. Sufficient water was used to generate one litre of surfactant suspension at ambient temperature. FIG. 12 shows the shear viscosity of the suspension for shear rates in the range from 0.1 s−1 to 100 s−1 at temperatures from 25 to 120° C. The viscosity increased with increasing temperature up to 60° C., whereupon the viscosity decreased with further increases in the temperature. The surfactant formed a clear, viscoelastic gel on heating. At a temperature of 80° C., the surfactant solution was able to generate a viscosity of 90 cP at a shear rate of 100 s−1.

1. customat ambient temperature
2. customfrom 25 to 120° C
3. temperatureThe viscosity increased
4. temperaturewith further increases in the temperature
5. customThe surfactant formed a clear, viscoelastic gel
6. temperatureon heating
7. customAt a temperature of 80° C.