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Start Over Topic atmospheric pressure Publication Year Range Last 10 years
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1. Atmospheric pressure argon plasma: an effective method to improve the hydrophilicity of the cellulose in paper.

Author

Shu, Quan, Zhang, Zhao, Ge, Shaolin, and Xuan, Shouhu

Subjects
ATMOSPHERIC pressure plasmas, ATMOSPHERIC pressure, PLASMA jets, CELLULOSE, CONTACT angle, STAPHYLOCOCCUS aureus, FUNGAL growth, ESCHERICHIA coli O157:H7
Abstract

Due to the surface hydrophobicity, the absorbing effect of the tobacco extract droplets on the reconstituted tobacco paper is unsatisfactory. Therefore, the surface property regulation of the tobacco paper has gained increasing attention. This work reports a novel argon (Ar) plasma treatment technique for improving the surface hydrophilicity and bacteriostatic effect of the paper. Firstly, Ar plasma was selected as the treatment gas and its improving effect was demonstrated through studying the contact angle changes of water droplet on the A4 paper. Then, the capillary fibers on the paper were bombarded by Ar plasma jet. The extract droplet contact angle on the reconstituted tobacco paper-15 s surface is only 14.6° within 1 s. In comparison to the pristine paper (5.9°/s), the absorption dynamic of the droplet increased to as high as 62.5°/s, which indicated the hydrophilicity was greatly improved by the Ar plasma method. The mechanism for improving the surface hydrophilicity of the cellulose in the tobacco paper also contributed to the generation of holes by Ar plasma jet, which increased the surface permeability of cellulose. At last, Ar plasma treatment showed excellent bacteriostatic effect, which could effectively inhibit the propagation and growth of fungi, Escherichia coli, and Staphylococcus aureus on the tobacco paper. [ABSTRACT FROM AUTHOR]

Published
2023
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2. SURFACE MODIFICATION OF PAPER AND PAPERBOARDS USING ATMOSPHERIC PRESSURE PLASMAS.

Author

Skácelová, D., Kováčik, D., Homola, T., Čech, J., and Černák, M.

Subjects
*ATMOSPHERIC pressure, *ATMOSPHERIC physics, *PLASMA astrophysics, *HYDROPHILIC interactions, *HYDROGEN bonding interactions
Abstract

Papers and paper boards are highly versatile materials with various beneficial properties. Their performance characteristics are given also by different types of surface coatings and operations, e.g., pigment coatings, surface sizing, or glossing, which are controlled by the chemistry and topography of paper and paper board surfaces. Different atmospheric pressure plasma techniques have been tested to raise the surface energy of paper products and also functionalizes surfaces. The chapter reviews a current state of the art and opportunities for the use of plasma surface treatment in the coating and conversion of paper products. Preliminary results on the paper surface activation, surface hydrophilization, etc., using a novel low-cost high-speed method for atmospheric pressure in-line plasma treatment of paper surfaces are presented. [ABSTRACT FROM AUTHOR]

Published
2016

3. Reproducibility of 'COST Reference Microplasma Jets'

Author

Deborah O'Connell, Judith Golda, V Schulz-von der Gathen, Timo Gans, J Held, Jerome Bredin, F. Riedel, Kari Niemi, M. W. van der Woude, and H. Davies

Subjects
Paper, Ozone, Materials science, Field (physics), FOS: Physical sciences, 01 natural sciences, 7. Clean energy, Temperature measurement, 010305 fluids & plasmas, chemistry.chemical_compound, atmospheric pressure plasma jet, 0103 physical sciences, power measurements, capacitively coupled radio frequency discharge, COST reference microplasma jet, 010302 applied physics, Reproducibility, Atmospheric pressure, Microplasma, Plasma, plasma medicine, Condensed Matter Physics, Physics - Plasma Physics, Computational physics, Plasma Physics (physics.plasm-ph), biomedical applications of plasmas, chemistry, Plasma medicine
Abstract

Atmospheric pressure plasmas have been ground-breaking for plasma science and technologies, due to their significant application potential in many fields, including medicinal, biological, and environmental applications. This is predominantly due to their efficient production and delivery of chemically reactive species under ambient conditions. One of the challenges in progressing the field is comparing plasma sources and results across the community and the literature. To address this a reference plasma source was established during the ‘biomedical applications of atmospheric pressure plasmas’ EU COST Action MP1101. It is crucial that reference sources are reproducible. Here, we present the reproducibility and variance across multiple sources through examining various characteristics, including: absolute atomic oxygen densities, absolute ozone densities, electrical characteristics, optical emission spectroscopy, temperature measurements, and bactericidal activity. The measurements demonstrate that the tested COST jets are mainly reproducible within the intrinsic uncertainty of each measurement technique.

Published
2020