Plasma Processes and Polymers

Cover image for Vol. 10 Issue 9

September 2013

Volume 10, Issue 9

Pages 745–828

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      Plasma Process. Polym. 9∕2013 (page 745)

      Angel Contreras-García, Yahye Merhi, Juan-Carlos Ruiz, Michael R. Wertheimer and Caroline D. Hoemann

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/ppap.201370025

      Thumbnail image of graphical abstract

      Cover: Thromboelastography (TEG) measures the clot time and tensile strength of blood samples. TEG cups and pins were modified with 4 distinct PECVD coatings to analyze mechanisms of blood plasma coagulation through the contact pathway. Only carboxylated anionic surfaces produced a faster and highly controlled clot kinetics compared to the bare commercial Cyrolite® methacrylate polymer. Further details can be found in the article by Caroline Hoemann et. al. on page 817.

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    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
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    1. Plasma Process. Polym. 9∕2013 (pages 746–831)

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/ppap.201370026

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Full Papers
    1. You have free access to this content
      Plasma Process. Polym. 9∕2013 (pages 747–749)

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/ppap.201370027

  4. Full Papers

    1. Top of page
    2. Cover Picture
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    1. Structure of Plasma-Deposited Copolymer Films Prepared from Acrylic Acid and Styrene: Part II Variation of the Comonomer Ratio (pages 750–760)

      Alaa Fahmy, Renate Mix, Andreas Schönhals and Jörg Friedrich

      Version of Record online: 5 JUN 2013 | DOI: 10.1002/ppap.201200110

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      The concentration of the COOH groups measured by XPS as well as by FTIR correlates with each other. This means the concentration of COOH on the surface and in the bulk increases proportional with increasing fraction of acrylic acid in precursor mixture. This point also indicates to the regularity of films.

    2. Reptation Aggregation of Liquid Silicon Oils Modified by Ar Plasmas (pages 761–766)

      Chao Ye, Yanhong Deng, Shuibing Ge and Zhaoyuan Ning

      Version of Record online: 17 JUN 2013 | DOI: 10.1002/ppap.201200172

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      Ar plasma treatments can induce a reptation aggregation in the liquid silicone oils. The reptation follows a η ∼ Lb dependence between the viscous coefficient (η) and the reptation length (L) with b = 3.37 in the η range of 20 and 500 mm2 · s−1. The crosslinking and formation of Si − O networks due to the energetic ions bombardment and VUV irradiation are a possible factors for the observed reptation.

    3. Variability in Plasma Polymerization Processes – An International Round-Robin Study (pages 767–778)

      Jason D. Whittle, Robert D. Short, David A. Steele, James W. Bradley, Paul M. Bryant, Faiq Jan, Hynek Biederman, Anton A. Serov, Andrei Choukurov, Andrew L. Hook, Winston A. Ciridon, Giacomo Ceccone, Dirk Hegemann, Enrico Körner and Andrew Michelmore

      Version of Record online: 17 JUN 2013 | DOI: 10.1002/ppap.201300029

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      The variability of plasma treatments and processes in laboratory plasma systems is explored through a round-robin study. Substantial differences are observed between reactor systems, both in the degree of plasma treatment, and the functional group retention and deposition rate of plasma polymerized acrylic acid. The results illustrate the importance of characterizing and understanding the effect of plasma properties directly.

    4. Plasma Synthesis of Hydrocarbon/Fluorocarbon Thin Films with Compositional Gradients (pages 779–791)

      Brendan D. Tompkins and Ellen R. Fisher

      Version of Record online: 17 JUN 2013 | DOI: 10.1002/ppap.201300024

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      PECVD is used to fabricate gradient film structures composed of amorphous hydrocarbon and fluorocarbon plasma polymers by dynamically changing the C3F8/H2 feed gas ratio. A combination of surface and bulk film analyses are used to show film composition depends on the plasma composition at the time of deposition and deposited layers are stable with continued plasma processing.

    5. Crosslinking of a Gelatin Solutions Induced by Pulsed Electrical Discharges in Solutions (pages 792–797)

      Isarawut Prasertsung, Siriporn Damrongsakkul and Nagahiro Saito

      Version of Record online: 29 JUL 2013 | DOI: 10.1002/ppap.201200148

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      Electrical discharges are investigated for the treatment of gelatin solutions as potential crosslinking, non-toxic methods. Plasmas were found to induce crosslinking of gelatin molecules, as demonstrated by the increased viscosity, decreased free amino contents, and increased gel strength. The addition of ethanol in gelatin solutions enhanced the crosslinking; this is because ethanol provides more free radicals necessary for crosslinking reactions.

    6. Surface Modification of the Polyimide Films by Electrical Discharges in Water (pages 798–807)

      Camelia Miron, Ion Sava, Ionut Jepu, Petre Osiceanu, Cristian Petrica Lungu, Liviu Sacarescu and Valeria Harabagiu

      Version of Record online: 2 JUL 2013 | DOI: 10.1002/ppap.201300015

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      Pulsed electrical discharges generated in distilled water are used to modify the surface of the aromatic polyimide films. The reactive species formed in the water plasma have induced surface modifications of the polymer. FTIR, XPS, and static contact angle measurements have confirmed the increased surface hydrophobicity of the water plasma treated polyimide films.

    7. Inactivation Effect of Argon Atmospheric Pressure Low-Temperature Plasma Jet on Murine Melanoma Cells (pages 808–816)

      Xing-Min Shi, Zheng-Shi Chang, Xi-Li Wu, Guan-Jun Zhang, Zhao-Yu Peng, Zhuo-Yuan Dong and Xian-Jun Shao

      Version of Record online: 7 AUG 2013 | DOI: 10.1002/ppap.201300018

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      Melanoma is one kind of malignant tumor on the surface of human and animal skin. An argon atmospheric pressure plasma jet (APPJ) is used to treat B16 murine melanoma cells cultured in vitro. Experimental results reveal that argon APPJ plasma can significantly result in apoptosis and necrosis of melanoma cells.

    8. Thromboelastography (TEG) Cups and Pins with Different PECVD Coatings: Effect on the Coagulation Cascade in Platelet-poor Blood Plasma (pages 817–828)

      Angel Contreras-García, Yahye Merhi, Juan-Carlos Ruiz, Michael R. Wertheimer and Caroline D. Hoemann

      Version of Record online: 9 JUL 2013 | DOI: 10.1002/ppap.201300027

      Thumbnail image of graphical abstract

      Thromboelastography (TEG) measures the clot time and tensile strength of blood samples. TEG cups and pins were modified with 4 distinct PECVD coatings to analyze mechanisms of blood plasma coagulation through the contact pathway. Only carboxylated anionic surfaces produced a faster and highly controlled clot kinetics compared to bare commercial Cyrolite® polymer.

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