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3 2006

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Langmuir monolayers of selected monoacylglycerols

Szyszko A., Szeląg H., Pawalec M. K., Sosnowski T. R.

Inżynieria i Aparatura Chemiczna

2006

Nr 5s

135-136

A study dealing with behaviour of pure C14-18 monoacyl-glycerols (MAG) Langmuir monolayers at the air-water interface is presented in the paper. It was observed the differences in monolayer properties depended on the hydrocarbon chain length of examined compounds, temperature and compression rate.

Determination of surface rheological parameters and their use in charcterization of dispersed systems

Pawalec M. K., Sosnowski T. R.

Inżynieria i Aparatura Chemiczna

2006

Nr 5s

108-111

The paper is focused on investigations of relationships between dynamic properties of the air-liquid interface of CTAB solutions and the stability of foams produced from these solutions. The measurements were performed with the Langmuir-Wilhelmy film balance and a thermostatic glass column where foams were generated pneumatically. The results show that at the CMC region, dynamic and rheological properties of interface can govern the stability of foam layer but at higher concentrations other mechanisms may prevail.

Badania trwałości pian wytworzonych metodą pneumatyczną

Sosnowski T. R., Pawalec M. K., Bargieł I.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

221-222

The stability of foams produced by fine bubbling in aqueous solutions of two surfactants (cationic - CTAB and non--ionic - Tween-20) was investigated for different concentrations and temperature. The data of foam persistence were discussed based on independent results of interfacial response to the surface tension disturbance. A positive correlation between the ability of generating Marangoni effects in the system and the observed stability of foam layer was found.