Plasma Processes and Polymers

Cover image for Vol. 11 Issue 8

Online ISSN: 1612-8869

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Recently Published Articles

  1. Cathodic Contact Glow Discharge Electrolysis for the Degradation of Liquid Ammonia Solutions

    Anis Allagui, Nicolas Brazeau, Hussain Alawadhi, Fares Al-momani and Elena A. Baranova

    Article first published online: 22 AUG 2014 | DOI: 10.1002/ppap.201400049

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    Above a critical terminal voltage between a small cathode and a large anode, the electrolyte breakdown leads to contact glow discharge electrolysis. The process degrades ammonia in part by nitrification thanks to the powerful generated oxidizing species (OH·, O·, etc.), at 12% per hour with 0.28 mol/kW h energy efficiency, and following pseudo first-order kinetics.

  2. Single Step Plasma Deposition of Platinum-Fluorocarbon Nanocomposite Films as Electrocatalysts of Interest for Micro Fuel Cells Technology

    Antonella Milella, Fabio Palumbo, Elena Dilonardo, Gianni Barucca, Pinalysa Cosma and Francesco Fracassi

    Article first published online: 22 AUG 2014 | DOI: 10.1002/ppap.201400039

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    Pt/fluorocarbon nanocomposite coatings were deposited from a combined PECVD and sputtering process. A comprehensive chemical and morphological characterization is presented. Such materials show interesting electrocatalytic activity towards hydrogen oxidation reaction, which makes them promising for application in micro fuel cell technology.

  3. Atmospheric Pressure Plasma Initiated Chemical Vapor Deposition Using Ultra-Short Square Pulse Dielectric Barrier Discharge

    Nicolas D. Boscher, Florian Hilt, David Duday, Gilles Frache, Thierry Fouquet and Patrick Choquet

    Article first published online: 22 AUG 2014 | DOI: 10.1002/ppap.201400094

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    The atmospheric pressure plasma initiated chemical vapor deposition of conventional polymer is described. Polymer molecular weights up to 30 000 g mol−1, measured by size exclusion chromatography (SEC), are achieved thanks to the use of an ultra-short square pulse dielectric barrier discharge. The polymer structure of the thin films is evidenced by matrix-assisted laser desorption/ionization high-resolution mass spectrometry.

  4. Atmospheric Plasma Surface Modification of PMMA and PP Micro-Particles

    Mary Gilliam, Susan Farhat, Ali Zand, Barrack Stubbs, Michael Magyar and Graham Garner

    Article first published online: 22 AUG 2014 | DOI: 10.1002/ppap.201300087

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    A fast, continuous, atmospheric plasma process is used to modify surface properties of polymer micro-particles of PMMA and PP. The treatment enhanced the hydrophilicity of the particles, as shown by contact angle and dispersion in water. An increase in polar surface functional groups, including C[BOND]O and C[DOUBLE BOND]O, were observed with XPS. The treatment conditions had effects on the contact angle, which enables tailoring of the properties with process optimization.

  5. Influence of Particle Mass and Flow Rate on Plasma Polymerized Allylamine Coated Quartz Particles for Humic Acid Removal

    Karyn L. Jarvis and Peter Majewski

    Article first published online: 22 AUG 2014 | DOI: 10.1002/ppap.201400099

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    Allylamine flow rate and mass of particles coated were varied to investigate their effect on surface chemistry and humic acid removal by plasma polymerized allylamine coated quartz particles. Their effect on surface chemistry was investigated via X-ray photoelectron spectroscopy, electrokinetic analysis and acid orange 7 adsorption/desorption. Varying the flow rate and mass of particles coated significantly influence humic acid removal.