Plasma Processes and Polymers

Cover image for Vol. 10 Issue 11

November 2013

Volume 10, Issue 11

Pages 925–1029

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      Plasma Process. Polym. 11∕2013 (page 925)

      Article first published online: 13 NOV 2013 | DOI: 10.1002/ppap.201370031

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      Cover: Contact lenses were coated using a 15 kHz plasma polymerization equipment (background). On the upper left side one can see two lenses (one coated and one uncoated) with a sessile drop of water, illustrating the change in hydrophilicity induced by the plasma treatment. The bottom of the figure displays the accumulation of constituents on two lenses (one coated and one uncoated) after a wearing period, illustrating the improvement of wearing comfort of coated lenses.

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    1. Plasma Process. Polym. 11∕2013 (pages 926–1031)

      Article first published online: 13 NOV 2013 | DOI: 10.1002/ppap.201370032

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    1. Plasma Process. Polym. 11∕2013 (pages 927–930)

      Article first published online: 13 NOV 2013 | DOI: 10.1002/ppap.201370033

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    1. Application of Poly(Acrylic Acid)-Multiwalled Carbon Nanotube Composite for Enrichment of Rrace Hg(II) (pages 931–937)

      Huangxin Cheng, Jitao Yu, Kefeng Zeng and Guangshun Hou

      Article first published online: 11 SEP 2013 | DOI: 10.1002/ppap.201300014

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      Poly(acrylic acid)-multiwall carbon nanotubes (PAA-MWCNTs) was synthesized by using microwave plasma technique, and was used as a adsorbent for the removal of Hg(II) contaminants from aqueous solution. Due to the effect of oxygen containing functional groups of PAA, PAA-MWCNTs presents high adsorption capacity for trace Hg(II) in aqueous solution.

    2. Electrospun Microfibrous Membranes with Atmospheric-Pressure Plasma Surface Modification for the Application in Dye-Sensitized Solar Cells (pages 938–947)

      Chun Huang, Pin-Jen Lin, Ching-Yuan Tsai and Ruey-Shin Juang

      Article first published online: 15 AUG 2013 | DOI: 10.1002/ppap.201300051

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      The cyclonic atmospheric-pressure plasma was useful in electrospun PVDF-HFP microfibrous membrane surface modification, where the water contact angle was reduced from 137 to <30° with a treatment time of 1 min only. The dye-sensitized solar cell fabricated with the atmospheric-pressure plasma modified electrospun PVDF-HFP electrolytes showed good conversion efficiency.

    3. Nitrogen Plasma Modification and Chemical Derivatization of Polyethylene Surfaces – An In Situ Study Using FTIR-ATR Spectroscopy (pages 948–958)

      Claus-Peter Klages, Alena Hinze and Zohreh Khosravi

      Article first published online: 28 AUG 2013 | DOI: 10.1002/ppap.201300033

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      In situ FTIR-ATR spectroscopy of polyethylene surfaces modified in afterglows of barrier discharges in nitrogen–hydrogen mixtures confirms that aromatic aldehydes may not be considered as chemical derivatization reagents with selectivity for primary amino groups on the surface. Applying H/D exchange and TFBA derivatization, respectively, to the plasma-modified surfaces two arguments are derived to support this statement.

    4. Surface Functionalization of COC Microfluidic Materials by Plasma and Click Chemistry Processes (pages 959–969)

      Yoann Ladner, Fanny d'Orlyé, Camille Perréard, Bradley Da Silva, Cédric Guyon, Michael Tatoulian, Sophie Griveau, Fethi Bedioui and Anne Varenne

      Article first published online: 15 AUG 2013 | DOI: 10.1002/ppap.201300066

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      A robust method for COC functionalization was developed for the first time by plasma polymerization, providing brominated functionalities, further functionalized by surface “click” chemistry. The successful immobilization of a fluorescent alkyne demonstrated an excellent robustness, homogeneity and high surface reactivity of brominated deposits. This opens the way to incorporating different functional groups on COC surfaces, for the development of COC microchip.

    5. Nanofilms Produced by Magnetron Enhanced Plasma Polymerization from Methane and Oxygen for Coating of Rigid Contact Lenses (pages 970–977)

      Michael Bergmann, Loic Ledernez, Gregory Dame, Sebastian Lickert, Frank Widmer, Yvonne Gier and Gerald Urban

      Article first published online: 11 SEP 2013 | DOI: 10.1002/ppap.201300028

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      This study aims at improving the two major attributes of contact lenses, the wettability and the protein adsorption, by means of a low-pressure magnetron enhanced 15 kHz plasma polymerization process. A contact angle of down to 18° and a protein adsorption of only 0.2 µg cm−2 were achieved. This study shows that these coatings improve the wearing comfort and the overall quality of contact lenses.

    6. Polystyrene Surface Modification for Localized Cell Culture Using a Capillary Dielectric Barrier Discharge Atmospheric-Pressure Microplasma Jet (pages 978–989)

      Kyle G. Doherty, Jun-Seok Oh, Paul Unsworth, Andrew Bowfield, Carl M. Sheridan, Peter Weightman, James W. Bradley and Rachel L. Williams

      Article first published online: 7 OCT 2013 | DOI: 10.1002/ppap.201300052

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      This report demonstrates that an atmospheric-pressure helium plasma jet can be used to modify polystyrene surfaces in a spatially defined manner. Oxygen functionalization, as observed by XPS, causes a decrease in the contact angle. This functionalization promotes localized epithelial cell attachment. AFM results show that microplasma jet treatment does not significantly alter the surface topography.

    7. Control the Composition of Tantalum Oxynitride Films by Sputtering a Tantalum Target in Ar/O2/N2 Radiofrequency Magnetron Plasmas (pages 990–998)

      Angélique Bousquet, Fadi Zoubian, Joël Cellier, Thierry Sauvage and Eric Tomasella

      Article first published online: 11 SEP 2013 | DOI: 10.1002/ppap.201300036

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      Sputtering an elemental target with two reactive gases is far from simple. However this paper describes a progressive plasma analysis of various Ar/O2/N2 atmospheres from simple to more complex gas mixtures. This study shows it is the possible to map the nature of target surface depending on gas flow rates and to correlate it to the composition of deposited films. Hence, tantalum oxynitride films with composition varying from nitride to oxide one can be obtained.

    8. Experimental Study of the Plasma Polymerization of Ethyl Lactate (pages 999–1009)

      Sylvie Ligot, Fabian Renaux, Laurent Denis, Damien Cossement, Nicolas Nuns, Philippe Dubois and Rony Snyders

      Article first published online: 17 SEP 2013 | DOI: 10.1002/ppap.201300025

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      Ethyl lactate-based plasma polymer films (ELPPF), that could be used as (bio-)degradable barrier coatings, have been synthesized by plasma polymerization. A design of experiments reveals that RF power is the key parameter to control the ester density and the crosslinking degree of the films. The control of these features opens the way for the fine tuning of the gas permeability, and consequently of the degradation rate of ELPPF.

    9. Mineralization of Phenol in Water by Catalytic Non-Thermal Plasma Reactor – An Eco-Friendly Approach for Wastewater Treatment (pages 1010–1017)

      Pathpireddy Manoj Kumar Reddy, Allumolu Dayamani, Shaik Mahammadunnisa and Challapalli Subrahmanyam

      Article first published online: 17 SEP 2013 | DOI: 10.1002/ppap.201300084

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      Feasibility of non-thermal plasma dielectric barrier discharge reactor for the mineralization of aqueous organic pollutant phenol was tested. Coupling the plasma reactor with ceria catalysts improved both the degradation and mineralization. It has been demonstrated catalyst facilitates the formation of short-lived species or/and secondary oxidants like atomic oxygen by in situ decomposition of ozone.

    10. Evolution of Hydrophobicity in Plasma Polymerised 1,7-Octadiene Films (pages 1018–1029)

      Behnam Akhavan, Karyn Jarvis and Peter Majewski

      Article first published online: 7 OCT 2013 | DOI: 10.1002/ppap.201300055

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      Plasma polymerised 1,7-octadiene films with tuned hydrophobicity have been developed. The influence of plasma input specific energy and deposition time on surface chemistry, deposition rate, topography and hydrophobicity of deposited films is investigated. It is demonstrated that a precise control over the surface free energy is obtained by simply manipulating the plasma polymerisation parameters.

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