ISSN：0095-8522
1950年第5卷第5期
1. Department of Mechanical and Aerospace Engineering, The University of Alabama in Huntsville, Huntsville, AL 35899, USA;2. Reax Engineering Inc., 1958 University Ave., Suite B, Berkeley, CA 94704, USA;3. Pacific Southwest Research Station, USDA Forest Service, Riverside, CA 92507, USA;1. Western Australia School of Mine, Curtin University, Australia;2. Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
- 1.1. The rate of surface tension lowering of solutions of sodium laurate, sodium dodecyl sulfate, and sodium oleate were determined by the oscillating jet technique.
- 2.2. The stabilities of foams containing these surface-active agents were measured by the single bubble technique.
- 3.3. The surface viscosity and surface plasticity were determined for sodium laurate solutions. No plasticity was observed and the viscosity was essentially that of pure water.
- 4.4. The rate of surface tension lowering of sodium laurate increases with increasing concentration. At a given concentration the rate of lowering for sodium dodecyl sulfate is appreciably greater than that for sodium laurate. In the higher concentration range the rate for sodium oleate does not increase appreciably.
- 5.5. Sodium chloride increases the rate of surface tension lowering of sodium laurate.
- 6.6. It is probable that the stability of a foam is due to the ability of its films to resist deformation. The conditions for high foam stability are: (1) Low surface tension relative to that of the pure solvent, (2) moderate rate of surface tension lowering, and (3) a high bulk or surface viscosity.
- 7.7. The foam stabilities determined in this research are in qualitative agreement with theory.
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ISSN：0095-8522
1950年第5卷第5期
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