| title: | Research.of gas permeability of liquid-gas surfaces |
|---|---|
| reg no: | ETF5520 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.6-1.9. Chemistry and Molecular Biology |
| status: | accepted |
| institution: | TU Faculty of Physics and Chemistry |
| head of project: | Toomas Tenno |
| duration: | 01.01.2003 - 31.12.2006 |
| description: | Applicants and other researchers are reported that substances adsorbed onto liquid-gas interface have influence to the mass transfer through the interface. Characterisation and extent of the influence depends both of quantity and chemical nature of the surfactant.Main objective of the current work is to investigate influence of the surfactants on the oxygen mass transfer through the interface, therefore improving the equipment based on oxygen sensor, which allows to measure rate of oxygen mass transfer through the liquid-gas interface. At the bases of equipment, which consist Langmuir balances and oxygen sensor, measuring system will developed. The system permits to measure both surface pressure and impedance of surface layer on the mass transfer of the oxygen. The measuring system will be developed in co-opetation with laboratories of physical chemistry and electrochemistry of Technical University of Helsinki.Investigation includes following activities: measuring the influence of surfactants to the mass transfer of the oxygen, determining correlations between surface tension, surface pressure, structure of surfactants and permeability of the liquid-gas interface. Permeability of the liquid-gas interface at different concentartions of suractants (including lipids) will be measured. Based on the data obtained the layer of the adsorbed substances will be modelled, using both data obtained for surface pressure and oxygen permeability. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Karin Hellat | UT | lector | |
| 2. | Erik Mölder | UT | chemist | |
| 3. | Aare Selberg | UT | magistrant | |
| 4. | Toomas Tenno | TU Faculty of Physics and Chemistry | prof. | |
| 5. | Siiri Velling | UT | phD student | |