Plasma chemistry researchat Faculty of Chemistry

Brno University of Technology

František KrčmaZdenka Stará

BUT location

                                

Central Europe

BUT location

                                

Central Europe

Czech Republic, Brno

BUT location

                                

Central Europe

Brno – north part of city

BUT location

                                

Central Europe

Brno – faculty campus

BUT structure

Faculty of Architecture

Faculty of Chemistry

Faculty of Civil

Engineering

Faculty of Information Technology

Faculty of Mechanical Engineering

Faculty of Fine Arts

Faculty of Business and Management

Faculty of Electrical

Engineering and Communication

FCH structure

IPACInstitute of Physical

and Applied Chemistry

IMCInstitute of Material Chemistry

IFCBTInstitute of Food Chemistry

and Biotechnology

ICTEPInstitute of Chemistry

and Technology of Environmental Protection

PLASMA CHEMISTRYLABORATORY

microbiology analytical methods

• Deposition of organosilicone layers

• Diaphragm discharge in liquids

• Destruction of pollutants in atmospheric discharges

• Surface treatment and sterillization

• Plasma chemical removal of corrosion

• Discharge and post-discharge kinetics

Plasma chemistry research fields

Deposition of organosilicone layers

• Tetravinylsilane and vinyltriethoxysilane monomers

• Influence of deposition conditions on plasma polymer mechanical and optical properties

• Study of the role of reactive bounds during the thin films preparation

Deposition of organosilicone layers

• System equipped with mass spectroscopy and in situ spectroscopic ellipsometry

• Multilayer preparation and characterization

• Application in glass based composites

Deposition of organosilicone layers

main publications• Čech V., Vaněk J., Drzal L.: Deposition of Single Plasma-Polymerized

Vinyltriethoxysilane Films and their Layered Structure, Jap. J. Appl. Phys. 45 (2006) 8440

• Čech V., Inagaki N., Vaněk J., Přikryl R., Burešová A., Zemek J.: Plasma-Polymerized Versus Polycondensed Thin Films of Vinyltriethoxysilane, Thin Solid Film 502 (2006)181

• Čech V.: Plasma Polymer Film as a Model Interlayer for Polymer Composites, IEEE Transactions on Plasma Science 34 (2006) 1148

• Čech V., Vaněk J., Jones F., Goruppa A.: RF-Power-Controlled Young's Modulus of Plasma-Polymerized Organosilicon Films, J. Material. Sci. 40 (2005) 5099

• Čech V., Vaněk J., Studýnka J., Přikryl R.: Plasma Polymer Films Prepared in RF Inductive Coupling System, Chem. Papers 99 (2005) S446

• Rašková Z., Brandejs K., Vaněk J., Krčma F.: Plasma Diagnostic During Deposition Processes of Silane Based Thin Films, Czech. J. Phys. 54 (2004) C1036

Diaphragm discharge in liquids

negative streamers(negative discharge)

positive streamers(positive discharge) discharge reactor

Experimental conditions:

High voltage: 1-3 kVDischarge current: 90-250 mAInput power: 90-300 WSolution: water + electrolyte (+ dye)

Optimal solution conductivity: 100-1000 μS∙cm-1

Diaphragm discharge in liquids

Investigated processes:

• generation of reactive species from water

- OH, H, O and some other radicals (det. by OES)

- hydrogen peroxide (det. by colorimetric method)

• excitation of metal elements from alkaline solutions (det. by OES)

• degradation of organic compounds dissolved in water

- organic dyes

- humic acids

• behaviour of solution properties (pH, conductivity)

Diaphragm discharge in liquids

main publications• Procházková J., Stará Z., Krčma F.: Optical Emission Spectroscopy of

Diaphragm Discharge in Water Solutions, Czech J. Phys. 56 (2006) B1314• Stará Z., Krčma F.: Treatment of Humic Acids Solutions by Diaphragm

Discharge, Czech. J. Phys. 56 (2006) B1351• Stará Z., Krčma F.: Degradation of Organic Dyes Versus H2O2 Generation

During the DC Diaphragm Discharge Treatment in Water Solutions, Acta Phys. Slovaca 55 (2005) 515

• Stará Z., Krčma F.: The Study of H2O2 Generation by DC Diaphragm Discharge in Liquids, Czech. J. Phys. 54 (2004) C1050

• Stará Z., Krčma F., Nejezchleb M., Skalný J.D.: Organic Dye Decomposition by DC Diaphragm Discharge in Water: Effect of Solution Properties on Dye Removal, J. Adv. Oxid. Technol. (2007), submitted

• Stará Z., Krčma F., Slavíček P.: Creation and Stability of DC Diaphragm Discharge Generated in Water Solutions of Electrolytes and Organic Dyes, J. Electrost. (2007), recieved

• Gliding arc discharge

• Surface barrier discharge

Destruction of pollutants in atmospheric discharges

Experimental devices

• High-speed video camera measurements

Cycle duration, plasma channel length

• Destruction products analysis

Solid Phase Microextraction

(SPME) + GC-MS

TESTO 350 – simply gas analyser

• Optical measurements - OES

Destruction of pollutants in atmospheric discharges

Destruction of pollutants in atmospheric discharges

main publications• Grossmannová H., Cigánek M., Krčma F.: High-Molecular Products

Analysis of VOC Destruction in Atmospheric Pressure Discharge, J. Phys.: Conf. Ser. 63 (2007) Article No. 012011

• Grossmannová H., Krčma F.: The Applicability of the Solid Phase Microextraction Technique for the Analysis of the Gliding Arc Discharge Products, Chem. Papers 99 (2005) S137

• Grossmannová H., Vrajová J., Krčma F.: VOC Destruction in Atmospheric Pressure Discharges – Analysis of the Low Molecular Products, Proceedings of ISPC XVIII, Abstract 752, full 27P-170, Kjoto 2007.

• Grossmannová H., Krčma F.: VOC Abatement in Gliding arc Discharge – Low Molecular Products Analysis, Proceedings of Frontiers in Low Temperature Plasma Diagnostics VII, full text 4 pages on CD, Beverley 2007

Surface treatment and sterilization

DBD surface discharge

Plasma reactor UPS 100W

- Material: Paper, PE, PES - Experimental conditions:

Atmospheric pressurePlasma power input 130 – 190 WAirTreatment time 0 – 60 s

- Surface energy evaluation, Absorption, Spectrofotometer

Hydrofility/hydrophobity

Surface treatment and sterilization

B

C

A

DBD volume discharge

Faculty of Science, Masaryk University

- Bioindicator – fungi Aspergillus Niger- Experimental conditions:

Atmospheric pressurePlasma power input 93 - 1080 mWcm-3

Nitrogen, Argon, HeliumTreatment time 0 – 240 s

Sterilization

Surface treatment and sterilization

main publications• Janča J., Sťahel P., Buchta J., Subedi D., Krčma F., Pryčková J.:

A Plasma Surface Treatment of Polyester Textile Fibers Used for Reainforcement of Car Tires, Polymers and Plasmas 6 (2001) 15

• Vrajová J., Sťahel P., Novotný O., Buršíková V., Krčma F., Čech J.: Plasma Based Removal of Microbial Contamination of Paper, Proc. 8th Internat. Balkan Workshop on Appl. Phys., Constanca 2007

• Vrajová J., Prudíková I., Rašková Z., Krčma F.: Plasma Based Removal of Microbial Contamination of Paper, Proceedings of ISPC XVIII, Abstract 689, full 27P-121 (4 pages) on CD, Kjoto 2007

• Čechová E., Klučáková M., Krčma F., Majzlík P., Vrajová J.: Interaction of Humic Acids Thin Layers with Plasma at Atmospheric Pressure, Proceedings of ISPC XVIII, Abstract 745, full 27P-163 (4 pages) on CD, Kjoto 2007.

• Vrajová J., Rašková Z., Prudíková I., Krčma F.: Utilization of Atmospheric Pressure Discharges for Paper Sterilization, Proceedings of 16th Symposium on Application of Plasma Processes, 277-278, Podbanské 2007

Plasma chemical removal of corrosion

• Method is known for about 20 year but there is only a very limited knowledge about the mechanisms

• Empirically it is used mainly for iron and silver made objects

Plasma chemical removal of corrosion

• Application on laboratory prepared samples with defined process of corrosion layer preparation

• Use for iron, copper, bronze and brass samples with defined surface raphness

• Analyse of the plasma during the process and all acessible analyses of sample surface during whole process

Plasma chemical removal of corrosion

main publications• Rašková Z., Krčma, F.: Plasmachemical Reduction for the

Conservation of Archaeological Artefacts, Publ. of Astronom. Observ. Belgrade 82 (2007) 159

• Krčma F., Cihlář M., Klíma M.: Diagnostic of Plasmachemical Removal of Copper Based Corrosion Layers, Chem. Papers 99 (2005) S583

• Rašková Z., Krčma F., Klíma M., Kousal J.: Spectroscopy of Low Pressure Discharges Used for Plasmachemical Treatment of Archaeological Artifacts, Chem. Papers 96 (2002) S101

• Rašková Z., Krčma F., Klíma M., Kousal J.: Characterisation of Plasmachemical Treatment of Archaelogical Artifacts, Czech. J. Phys. 52 (2002) D927

Discharge and post-discharge kinetics

experimental

• flowing post-discharge in pure nitrogen and in nitrogen mixtures with oxygen, argon and hydrogen

• influence of hydrocarbon and metallic traces on nitrogen post-discharge

• fragmentation of organosilicone molecules in plasmas

Discharge and post-discharge kineticstheoretical

• study of v-t and v-v processes in nitrogen post-discharge • creation of nitrogen molecular ions during the post-

discharge• pooling reactions in pure nitrogen• energy transfer reactions between near laying levels• energy transfer between different molecular species,

mainly from nitrogen metastables to other particles• estimation of reaction rates• formation of organosilicone structures in plasma-gas

phase• pulsed discharges as combination of ac active discharge

with its afterglow

Discharge and post-discharge kinetics

main publications• Krčma F., Protasevich E. T.: Post-discharges in Pure Nitrogen and in

Nitrogen Containing Halogenated Hydrocarbon Traces, Tomsk Polytechnic University Publishing, Tomsk 2003, pages 1 – 132, ISBN 189-8326-444.

• Krčma F., Mazánková V., Soural I.: Short Live Afterglow in Pure Nitrogen and Nitrogen Containing Traces of Methane and Oxygen, Publ. Astronom. Observ. Belgrade 82 (2007) 133

• Kanický V., Otruba V., Hrdlička A., Krásenský P., Krčma F.: Influence of Metal Traces on Kinetics of a Nitrogen Glow Discharge in Post-Discharge Period, J. Atom. Analyt. Spectrom. 22 (2007) 754

• Krčma F., Mazánková V., Soural I.: Secondary "Pink Afterglow" in Post-Discharge in Pure Nitrogen, Czech. J. Phys. 56 (2006) B871

• Krčma F.: Pink Afterglow in Nitrogen - Hydrocarbon Mixtures, Acta Phys. Slovaca 55 (2005) 453

• Hubeňák J., Krčma F.: Determination of Hydrocarbon Concentration in the N2 DC Flowing Afterglow, J. Phys. D: Appl. Phys. 33 (2000) 3121

Practical course from plasma chemical processes and

technologies1. Low pressure measuring

2. EPR spectroscopy of plasma

3. RF discharge at low pressure

4. Optical emission spectroscopy of plasma

5. VOC destruction in atmospheric pressure plasma

6. Hydrogen peroxide generation by diaphragm discharge in liquids

7. Organic dyes degradation by diaphragm discharge in liquids

8. Study of ozone generation

9. Changes of polymer materials wettability by surface discharge

10. Permeability enhancement of non-wowen textile materials

International collaboration

• University Marne la Vallee, Paris region, France• Belgrade University, Serbia• Instituto Superior Tecnico de Lisboa, Portugal• Ecole Nationale Superiere du Chimie de Paris, France• Faculty of Mathematics, Physics and Informatics,

Comenius Univesrity Bratislava, Slovakia• Physical Institut, Zemun, Serbia

National collaboration

• Faculty of Science, Masaryk University Brno• Technical Museum, Brno• Faculty of Mathematics and Physics, Charles University,

Prague• Institut of Plasma Physics, Czech Academy of Science,

Prague• Physical Institute, Czech Academy of Science, Prague• Faculty of Electrical Engineering, Czech Technical

University, Prague• HVM Plasma, Ltd, Prague• Romill, Ltd, Brno• Vacuum Praha, Ltd, Prague• Zlín Precission, Ltd, Zlín

Actual projects• Study of Kinetic Processes in Nitrogen Post-Discharge with Respect to their

Use in Chemical Analysis, Czech Science Foundation 202/05/0111 (2005-2007) – Krčma.

• Advanced Topics in Physics and Chemistry of Plasmas, Czech Science Foundation 202/03/H162 (2003-2007) – Krčma.

• Study of Processes in Electrical Discharges in Water Solutions of Organic Compounds, Czech Science Foundation 202/07/P371 (2007-2009) – Stará.

• Theoretic and Spectroscopic Study of Organosilicone Molecules and Their Fragmentation, Barrande 2-07-27 (2007-2008) – Krčma.

• Research of Plasma Chemical Processes for Development of Inteligent polymeric Nanostructures, Czech Science Foundation 104/06/0437 (2006-2008) – Čech.

• Structuring of plasma polymers, 1P05OC087 (2004-2007) – Čech.• Participation at Research plan Multifunctional Heterogeneous Materials

based on Synthetic Polymers and Biopolymers, Ministry of Education, Youth and Sport MSM 0021630501 (2005-2009).

Main closed projects• Surface Activation of Synthetic Polymer Materials in Non-Isothermic Low

Temperature Plasma, Czech Science Foundation 104/99/0307 (1999-2001) – Krčma.

• Study of the Processes in Post-discharge Plasma Created in Pure Nitrogen with Chloro- and Fluoro-Carbons and Their Application in Determination of the Plastic Materials Degradation, Czech Science Foundation 202/98/P258 (1998-2001) – Krčma.

• Plasma Surface Treatment of glass Fibers for Polymeric Composites, Czech Science Foundation 104/00/0708 (2000-2002) – Čech.

• Functional Nanostructures for Composite Interfaces, ME 597 (2002-2006) – Čech.

• Plasma Polymer Films Prepared in RF Inductive Coupling System, OC 527.110 (2001-2005) – Čech.

• 12 project of Czech Ministry of Education, Youth and Sports in program Development of Universities.

Scientific staff

Students

Finished students

Assoc. Prof. František Krčma, Ph.D.Assoc. Prof. Ota Salyk, CSc.Dr. Zdenka Stará, Ph.D.

Prof. Vladimír Čech, Ph.D.Dr. Radek Přikryl, Ph.D.

Bc 4Mgr. 12Ph.D. 6

Bc 2Mgr. 3Ph.D. 2

Bc 3Mgr. 18Ph.D. 3

Bc 1Mgr. 4Ph.D. 2

IPAC IMC

Publications - overview