Plasma Processes and Polymers
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Online ISSN: 1612-8869
Materials Science Weekly Newsletter
Recently Published Articles
- 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
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.
- 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
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.
- 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
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.
- 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
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 CO and CO, were observed with XPS. The treatment conditions had effects on the contact angle, which enables tailoring of the properties with process optimization.
- 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
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.