THE PHYSICAL CHEMISTRY AND STABILITY OF BUBBLES WITH SPECIAL REFERENCE TO AQUEOUS SOLUTIONS. SURFACE VISCOSITY OF DETERGENT SOLUTIONS AS A FACTOR IN FOAM STABILITY.
Abstract
'Surface viscosity' data were obtained with a group of detergents and detergent mixtures, selected to illustrate the role of 'surface viscosity' in the stability of the foams obtained from these solutions. A rotational type viscometer suitable for this purpose has been developed and is described in detail. High surface viscosity was found to be associated with high foam stability and low surface viscosity with poor stability. High foam stability appears to depend on both high surface viscosity and on low permeability of the film to gas. A 'duplex' theory of foaming is proposed, based on the results obtained with special detergent mixtures. It is suggested that detergents of high foam stability are in reality two or more compounds, one of which has high solubility and provides a reservoir of surface-active material of poorly developed coherence, and the other of which, though less in amount and also less soluble, provides the necessary coherence in the mixed film.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 11, 1949
- Accession Number
- AD0625346
Entities
People
- A. G. Brown
- J. W. Mcbain
- W. C. Thuman
Organizations
- SRI International