Development of a process for improving cleaning and hygiene of textile floor coverings based on carbon dioxide clathrates
IGF 17402 N
Textile floorings are used on a large scale. This applies more and more also to the health and hygiene sector. The cleaning of textile floorings puts the cleaning service companies face with great challenges. The efficient and hygienic cleaning of textile floorings is only possible in the context of a basic cleaning. The most important method, the spray extraction, brings several disadvantages. These include the high water entry, the resulting long drying times and associated downtime for the operator, but also the potential damage to the textile floorings.
In this research project carbon dioxide clathrates were used for the first time for cleaning of textile floorings. These carbon dioxide clathrates were made both in pure form and with embedded ethanol in a 10-liter pressure reactor of carbon dioxide and water and adding the appropriate additive at pressures between 30 and 50 bar and temperatures between 0 ° C and 5 °C. For the characterization of carbon dioxide clathrates next TOC and density measurements were also carried out UV-VIS measurements. A storage of the clathrates was possible at temperatures of -20 °C over several days. The application of clathrates on the textile floorings was carried out with the aid of a pressure jet system.
The developed clathrate cleaning method has compared to the spray extraction method decisive advantages: With its single components of water and carbon dioxide clathrates are environmentally and toxicologically safe. Without harming the textile flooring, the clathrates can be applied as a solid and also removed again. This allows the accessibility of the floorings due to the low residual moisture after a short time. The time periods during which the textile floorings cannot be used will be reduced by the clathrate method developed to a minimum. The clathrate method shows in the removal of different stains from different textile floorings with the spray extraction method comparable results.
The disinfecting effect of the clathrate in the purification process of microbial stains is also comparable to the spray extraction method. Based on these results and the high area performance and the low cost, the new method for cleaning textile floorings with carbon dioxide clathrates represents an advantageous alternative to the conventional basic cleaning process.
The IGF-project 17402 N of the research association Europäische Forschungsgemeinschaft Reinigungs- und Hygienetechnologie e.V., Campus Fichtenhain 11, D-47807 Krefeld, was supported via the AiF within the funding programme „Industrielle Gemeinschaftsforschung und –entwicklung (IGF)“ by the Federal Ministry of Economic Affairs and Energy (BMWi) due to a decision of the German Parliament.
The research report is available on request from FRT.