Plasma Processes and Polymers

Cover image for Vol. 12 Issue 6

Online ISSN: 1612-8869

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Recently Published Articles

  1. Energy of Reactions in Atmospheric-Pressure Plasma Polymerization with Inert Carrier Gas

    Bernard Nisol, Hervé Gagnon, Sophie Lerouge and Michael R. Wertheimer

    Article first published online: 7 JUL 2015 | DOI: 10.1002/ppap.201500068

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    We report atmospheric pressure (AP) dielectric barrier discharge (DBD) energy values, Eg, in argon flow without and with a few ‰ of gaseous dopant, including C2H2 that leads to plasma polymerization (PP). The difference, ΔEg, normalized to the number of dopant molecules correlates well with low pressure PP, but not with AP plasma literature, which greatly overestimates the W/FM parameter.

  2. Non-Thermal Plasma Treatment of Agricultural Seeds for Stimulation of Germination, Removal of Surface Contamination and Other Benefits: A Review

    Lakshman K. Randeniya and Gerard J. J. B. de Groot

    Article first published online: 24 JUN 2015 | DOI: 10.1002/ppap.201500042

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    Non-thermal plasma is a promising technology for treatment of plant seeds prior to cultivation. The known benefits include removal of microbial content, improving stress tolerance, improving germination properties and enhancing seedling vigour. Non-thermal plasma treatments of seeds can lead to enhanced plant growth and higher crop yields. The method has the potential to replace or complement conventional chemical-based and other priming techniques.

  3. Ag:TiN-Coated Polyurethane for Dry Biopotential Electrodes: From Polymer Plasma Interface Activation to the First EEG Measurements

    Paulo Pedrosa, Patrique Fiedler, Cláudia Lopes, Eduardo Alves, Nuno P. Barradas, Jens Haueisen, Ana V. Machado, Carlos Fonseca and Filipe Vaz

    Article first published online: 24 JUN 2015 | DOI: 10.1002/ppap.201500063

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    The plasma activated and Ag:TiN-coated dry biopotential electrodes are promising candidates to replace the standard wet Ag/AgCl electrodes. The optimized plasma treatments translate into excellent polyurethane/Ag:TiN interfacial adhesion of the samples. The EEG validation of the proposed Ag:TiN-coated PU multipin electrodes showed no considerable differences of the signals when comparing with the reference wet electrodes.

  4. Elastic Modulus and Hardness of Plasma-Polymerized Organosilicones Evaluated by Nanoindentation Techniques

    Vladimir Cech, Jaroslav Lukes, Erik Palesch and Tomas Lasota

    Article first published online: 22 JUN 2015 | DOI: 10.1002/ppap.201500036

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    The depth profile of the elastic modulus and hardness is very helpful and should be a standard method of characterizing the reproducibility of data and extrapolating data to the film surface (zero contact depth) to determine the correct mechanical properties of tested film. The depth profile is necessary to reveal the size effect, the effect of surface topography, or inhomogeneity of tested materials.

  5. Innovative Applications of Surface Wettability Measurements for Plasma-Modified Three-Dimensional Porous Polymeric Materials: A Review

    Morgan J. Hawker, Adoracion Pegalajar-Jurado and Ellen R. Fisher

    Article first published online: 16 JUN 2015 | DOI: 10.1002/ppap.201500035

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    The wettability of plasma-modified, porous, 3D, polymeric constructs is an important property for biomedical and environmental applications. Wettability measurements on these complex substrates, however, present numerous challenges. This review highlights methods used to assess the wettability of numerous plasma-treated porous, 3D, polymeric materials, and provides five recommendations for best practice.