Decrease of the surface pH of maple and the production of nitrate by three pulsed dielectric barrier discharges
| Autor: | Marco Fleckenstein, Gisela Ohms, Wolfgang Viöl, Holger Militz, F. Peters, M. Gelker |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
PH reduction Analytical chemistry 02 engineering and technology Plant Science Dielectric barrier discharge Dielectric engineering.material 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound Nitrate Nitric acid 0103 physical sciences Remote plasma General Materials Science 010302 applied physics Maple Atmospheric pressure Forestry surface pH maple nitrate 021001 nanoscience & nanotechnology chemistry engineering 0210 nano-technology |
| Popis: | In this study, the influence of dielectric barrier discharges at atmospheric pressure on maple sapwood was analyzed. Three common discharge types, a coplanar surface barrier discharge (CSBD), a direct dielectric barrier discharge and a jet discharge/ remote plasma, were realized by the same electrodes and power supply. In general, plasma treatments are known to modify various surface properties leading to improved adhesion. For resins such as urea formaldehyde, the curing behavior is dependent on the pH. Therefore, the change of the surface pH value of maple is measured. As the main product of plasma-generated nitrogen oxides, the nitrate concentrations and consequently the nitric acid concentrations of the surfaces were determined. A significant pH reduction from about pH 5.6 to pH 4.6 was reached after a 30 s plasma treatment. An increase in the nitrate concentration over the plasma treatment duration was measured for all three discharges with a maximum of 6.6 mg/L for the CSBD, which corresponds to a concentration of 8.25 mg per m2 wooden surface. peerReviewed |
| Databáze: | OpenAIRE |
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