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Imaging gas and plasma interactions in the surface-chemical modification of polymers using micro-plasma jets
This paper reports on the correlation between gas flow and plasma behaviour in the outflow of a micro-atmospheric pressure plasma jet operating in helium using both 2D optical imaging and Schlieren photography. Schlieren photography shows that the helium outflow changes from laminar to turbulent con...
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| Published in: | Journal of physics. D, Applied physics Applied physics, 2011-04, Vol.44 (15), p.155206 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c513t-e7a5fff9648a5440cf71db1b5b6bb760c4c1c1dacb5c4cb083ee6197c8cc126e3 |
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| cites | cdi_FETCH-LOGICAL-c513t-e7a5fff9648a5440cf71db1b5b6bb760c4c1c1dacb5c4cb083ee6197c8cc126e3 |
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| container_issue | 15 |
| container_start_page | 155206 |
| container_title | Journal of physics. D, Applied physics |
| container_volume | 44 |
| creator | Oh, Jun-Seok Olabanji, Olumuyiwa T Hale, Craig Mariani, Raffaello Kontis, Konstantinos Bradley, James W |
| description | This paper reports on the correlation between gas flow and plasma behaviour in the outflow of a micro-atmospheric pressure plasma jet operating in helium using both 2D optical imaging and Schlieren photography. Schlieren photography shows that the helium outflow changes from laminar to turbulent conditions after distances between 20 and 50 mm from the nozzle. Above a flow rate of 1.4 slm, the length of the laminar region decreases with increasing flow rate. However, by contrast the visible plasma plume increases in length with increasing flow rate until its extension just exceeds that of the laminar region. At this point, the plasma becomes turbulent and its length decreases. Exposing polystyrene (PS) samples to the plasma jet significantly alters the water contact angle in a defined area, with the hydrophobic PS surface becoming more hydrophilic. This modification occurs both with and without direct contact of the visible glow on the surface. The radius of the treated area is much larger than the width of the visible jet but much smaller than the area of the turbulence on the surface. The treated area reduces with increasing nozzle–substrate distance. |
| doi_str_mv | 10.1088/0022-3727/44/15/155206 |
| format | article |
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D, Applied physics</title><description>This paper reports on the correlation between gas flow and plasma behaviour in the outflow of a micro-atmospheric pressure plasma jet operating in helium using both 2D optical imaging and Schlieren photography. Schlieren photography shows that the helium outflow changes from laminar to turbulent conditions after distances between 20 and 50 mm from the nozzle. Above a flow rate of 1.4 slm, the length of the laminar region decreases with increasing flow rate. However, by contrast the visible plasma plume increases in length with increasing flow rate until its extension just exceeds that of the laminar region. At this point, the plasma becomes turbulent and its length decreases. Exposing polystyrene (PS) samples to the plasma jet significantly alters the water contact angle in a defined area, with the hydrophobic PS surface becoming more hydrophilic. This modification occurs both with and without direct contact of the visible glow on the surface. The radius of the treated area is much larger than the width of the visible jet but much smaller than the area of the turbulence on the surface. 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D, Applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Oh, Jun-Seok</au><au>Olabanji, Olumuyiwa T</au><au>Hale, Craig</au><au>Mariani, Raffaello</au><au>Kontis, Konstantinos</au><au>Bradley, James W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Imaging gas and plasma interactions in the surface-chemical modification of polymers using micro-plasma jets</atitle><jtitle>Journal of physics. D, Applied physics</jtitle><date>2011-04-20</date><risdate>2011</risdate><volume>44</volume><issue>15</issue><spage>155206</spage><pages>155206-</pages><issn>0022-3727</issn><eissn>1361-6463</eissn><coden>JPAPBE</coden><abstract>This paper reports on the correlation between gas flow and plasma behaviour in the outflow of a micro-atmospheric pressure plasma jet operating in helium using both 2D optical imaging and Schlieren photography. 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| ispartof | Journal of physics. D, Applied physics, 2011-04, Vol.44 (15), p.155206 |
| issn | 0022-3727 1361-6463 |
| language | eng |
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| source | Institute of Physics:Jisc Collections:IOP Publishing Read and Publish 2024-2025 (Reading List) |
| subjects | Exact sciences and technology Fundamental areas of phenomenology (including applications) Instruments, apparatus, components and techniques common to several branches of physics and astronomy Optical elements, devices, and systems Optics Photography, photographic instruments and techniques xerography Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma turbulence Schlieren devices Waves, oscillations, and instabilities in plasmas and intense beams |
| title | Imaging gas and plasma interactions in the surface-chemical modification of polymers using micro-plasma jets |
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