Influence of the aerosol flow and exposure time on the structural changes in the filtering half masks material
| Autor: | Željko Radovanović, Radovan Karkalić, Darko Janković, Dušan Janković, Dušan Rajić, Negovan Ivanković, Stevan Lj Stupar |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Materials science Scanning electron microscope 02 engineering and technology General Chemistry respiratory system scanning electronic microscopy Volumetric flow rate Aerosol structure porosity lcsh:Chemistry 020303 mechanical engineering & transports 020901 industrial engineering & automation lcsh:QD1-999 0203 mechanical engineering fiber properties Composite material filtration dynamics Porosity Leakage (electronics) |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 83, Iss 4, Pp 463-471 (2018) Journal of the Serbian Chemical Society |
| ISSN: | 1820-7421 0352-5139 |
| Popis: | The flow of air and aerosol particles through the filtering half masks material depends on the structure porosity. It is very difficult to determine the behaviour of the filtering material during the process of extraction and retention of aerosols. The samples of five filtering half mask models were used in this investigation. Dynamics of the aerosol filtration through the filtering materials was tested using a method for testing the leakage of aerosol particles through the filtering material and a method for testing the inhalation resistance of filtering material, both specified in the SRPS EN 149:2013. Recording of the structural changes in the samples of the tested materials was carried out by the technique of scanning electron microscopy. The experiments showed a deviation of the results in relation to the theory of filtration the finely dispersed submicron sized particles. It was concluded that the aerosol leakage through the filtering half masks and their resistance to aerosol flow change depend on the aerosol flow rates and the on filtration process duration, as a direct consequence of the newly-made changes in the structure of the filtering material and due to reversibility effect between the filtration process and the changes in the filtering material. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR34034 and Grant no. III45019] |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|