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Published in last 50 years
Etude par spectroscopie RMN du H1, de la structure et de la stabilite des mousses de creme, de blanc d'oeuf et de biere. La technique est utilisable pour differents systemes colloidaux
It is experimentally shown that the stability of aqueous foams can be significantly enhanced by the addition of a small amount of water-soluble polymers. Such enhancement is attributed to the retardation both in the rate of drainage and in the rate of interbubble gas diffusion. Addition of water-soluble polymer increases the bulk viscosity and thereby decreases the rate of drainage. It also decreases the gas permeability of liquid lamella and as a result the rate of interbubble diffusion is retarded. A simple analysis incorporating both lamella drainage and interbubble diffusion has been developed. The qualitative predictions of this analysis are found to be consistent with our experimental observations.