Plasma Processes and Polymers

Cover image for Vol. 12 Issue 11

Online ISSN: 1612-8869

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Recently Published Articles

  1. Biodeactivation of Lipopolysaccharide Correlates with Surface-Bound NO3 After Cold Atmospheric Plasma Treatment

    Elliot A. J. Bartis, Pingshan Luan, Andrew J. Knoll, David B. Graves, Joonil Seog and Gottlieb S. Oehrlein

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500072

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    We report on measurements of surface-bound NO3on a variety of materials after treatment by both an atmospheric pressure plasma jet and surface microdischarge. This species forms on polymers containing neither nitrogen nor oxygen, indicating that it forms in the gas phase. The concentration of surface-bound NO3, not general oxidation, correlates with the biodeactivation of lipopolysaccharide, a pyrogenic biomolecule. This is the first attempt to correlate a specific surface moiety with biological function.

  2. Plasma-Assisted Synthesis of Chlorinated Polyvinyl Chloride (CPVC) Using a Plasma Circulating Fluidized Bed Reactor (PCFBR)

    Qianli Yang, Wei Lu, Ding Mao, Rui Yang and Yi Cheng

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500081

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    This work presents a novel gas-solid method which employs a plasma circulating fluidized bed reactor (PCFBR) operated at atmospheric pressure to synthesize CPVC. The results prove the feasibility of process decoupling method and characterization of CPVC products suggests that the quality of self-made CPVCs is comparable to the commercial products in terms of microstructure.

  3. Treatment of Ribonucleoside Solution With Atmospheric-Pressure Plasma

    Xianhui Zhang, Renwu Zhou, Rusen Zhou, Maodong Chen, Jiangwei Li, Yue Sun, Qiang Chen, Size Yang and Qing Huo Liu

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500088

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    As an immediate and latest area of research focus, atmospheric microplasma has wide applications in the biomedical field. However, effects of plasma on ribonucleoside in DNA are less studied and reported. A self-made microplasma jet array device is used to treat basic blocks of DNA, and online ion-pair reversed-phase liquid chromatography (IP-RPLC) with electrospray tandem mass spectrometry (ESI-MS) is used to detect the reaction process. Results show oxidative damage to DNA is a complex process, influenced by charge transport and reactions that are controlled by a combination of enthalpic, entropic, steric, and compositional factors.

  4. Anti-Cancer Effects of Nonequilibrium Atmospheric Pressure Plasma on Cancer-Initiating Cells in Human Endometrioid Adenocarcinoma Cells

    Jun-Ichiro Ikeda, Yoko Tsuruta, Satoshi Nojima, Hajime Sakakita, Masaru Hori and Yuzuru Ikehara

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500097

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    To cure cancers, it is necessary to control cancer-initiating cells (CICs) that are believed to cause recurrence or metastasis. The treatment of nonequilibrium atmospheric pressure plasma (NEAPP) and NEAPP irradiation of tumor xenograft mice are performed in human uterine endometrioid adenocarcinoma cells. NEAPP treatment is effective not only on non-CICs but also on CICs.

  5. Fs Laser-Induced Plasmas from Energetic Polymers: Towards Micro-Laser Plasma Thruster Application

    Alexandra Palla Papavlu, Lukas Urech, Thomas Lippert, Claude Phipps, Jörg Hermann and Alexander Wokaun

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500142

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    This study is the first investigation of a plasma produced by fs irradiation of different fuel polymers (PVC, GAP, and PVN) doped with absorbers (carbon nanoparticles and IR-dye). By applying plasma imaging and plasma emission spectroscopy, the propagation velocities of selected plasma species have been determined, which are particularly important for applications in micro laser plasma thrusters.