ACTIVATION AND FUNCTIONALIZATION OF POLYMERS BASED ON GEOMETRY- INDEPENDENT PLASMA SOURCE CONCEPTS October 25, 2017 - Parts2Clean Fachforum und Innovationsforum
AGENDA Fraunhofer IST Basics about plasma technology Competencies of the Application Center for Plasma and Photonics The new ʺDisc Jetʺ plasma source
Locations of the Fraunhofer IST Fraunhofer Institute for Surface Engineering and Thin Films IST Bienroder Weg 54 E 38108 Braunschweig Application Center for Plasma and Photonics of the Fraunhofer IST Von-Ossietzky-Str. 100 37085 Göttingen Dortmund Surface Technology Center (DOC) Eberhardstraße 12 44145 Dortmund
Fraunhofer IST Key data Head of Institute Prof. Dr. Günter Bräuer Head of Application Center Prof. apl. Prof. Dr. Wolfgang Viöl Staff Members Employees 125 Apprentices 3 Cooperation with IOT 27 Students 42 Budget 12,4 Mio
Application Center for Plasma and Photonics Competencies Atmospheric pressure plasma sources and systems Laser plasma hybrid processes Plasma medical processes Plasma particle technology Plasma analysis and diagnostics
Plasma technology Basics In the old days the philosophers were aware of the following elements: earth water air fire This three aggregate states are generally known: solid state liquid gas plasma (99 percent of the universe is in a plasma state)
Plasma technology Basics Non-equilibrium plasmas - E E 4m m a e 0,002
Plasma technology Basics Non-thermal low-temperature plasma T i T 25 C T i «T e 25000 C Hot cold conserves resources. T = Temperature of neutral particles T i = Temperature of ions T e = Temperature of electrons
Coating Surface modification Competencies Fraunhofer IST / Application Center Technology overview Core technology: Low-temperature atmospheric pressure plasmas Activation Laser plasma hybrid Fields of application Adhesion Ultra-fine cleaning etc. Fields of application Micro structuring Polish Ultra-fine cleaning PECVD Cold plasma spraying Surface features Scratch resistance Hydrophobing etc. Surface features Conductivity Antibacterial etc.
Application Center for Plasma and Photonics Overview competencies Head: Prof. Dr. Wolfgang Viöl Innovation manager: Dr. Bernd Schieche Specialist competencies plasma and photonics Laser and laser plasma hybrid technology Plasma particle technology Life sciences / plasma medicine Wood and woodbased materials Micro structuring Surface modification Cleaning Cold plasma spraying Particle coating Dermatology Hygiene Cell culturing Joining technology Treatment processes Cross-sectional tasks Analytics and diagnostics Surface analysis Plasma diagnostics Source conception (handheld devices) Discharge concepts High voltage generators Systems and equipment engineering Construction / production (CE) Activation / functionalization
Application Center for Plasma and Photonics Cross-sectional tasks Analytics and diagnostics Surface analysis Plasma diagnostics Source conception (handheld devices) Discharge concepts High voltage generators Systems and equipment engineering Construction / production (CE) Activation / functionalization
Source conception (handheld devices) Discharge concepts and high-voltage generators
Systems and equipment engineering Construction / production (CE) and activation / functionalization
Disc jet plasma source Homogeneous 3D treatment of complex geometries
Disc jet plasma source Contoured, homogeous plasma activation DBD principle (dielectric barrier discharge) 30 C Process temperatures in the range of 30 to 60 C permit the treatment of even temperature-sensitive substrates Fields of application: activation, functionalization, cleaning Precise-contour application of the discharge at cavities and undercuts (up to about 20 mm) Generation of reactive species directly on the substrate surface Current working diameter (treatment area) between 20 and 80 mm (upscalable) Slide discharges with a depth accessibility of 1 to 30 mm (Jet even up to 60 mm) Wide range of possibilities for the treatment of different materials such as thin glass, polymer and metal foils, wood-based materials, veneers, paper, etc. Currently realized processing speeds between 1 to 35 m/min.
Application example Degreasing of metal surfaces reference (about 100 x 200 µm) plasma treated REM-photographs of an aluminum foil (with rolling oil) before and after the cleaning process by Disc-Jet at a treatment speed of 1 m/min. The rolling marks of the aluminum surface are clearly visible again after the plasma treatment (using compressed air as process gas).
Application example Reduction of oxide layers reference (copper oxidized; 2 x 5 cm) plasma treated Reduction of the copper oxide layer by Disc-Jet (using process gas with H percentage).
surface soundness [Mpa] Activation of polymer extrusion semi-finished products by Disc Jet and the process gas Argon target value reference value variants assessed Comparison of the paint adhesion on plastic profiles after common respectively chemical precleaning and after cleaning by Disc-Jet and argon as process gas.
surface soundness [Mpa] Activation of polymer extrusion semi-finished products by Disc Jet and the process gas compressed air target value reference value variants assessed Comparison of the paint adhesion on plastic profiles after common respectively chemical precleaning and after cleaning by Disc-Jet and compressed air as process gas.
Thank you for your attention! Dr. rer. nat. Bernd Schieche Innovation manager Application Center for Plasma and Photonics Fraunhofer Institute for Surface Engineering and Thin Films IST Von-Ossietzky-Str. 100 37085 Göttingen Germany Phone +49 551 3705-219 Fax -206 bernd.schieche@ist.fraunhofer.de www.plasmaundphotonik.fraunhofer.de