Functional-Group-Retaining Polymerization of Hydroxyethyl Methacrylate by Atmospheric Pressure Non-Equilibrium Plasma

Fei, Xiao Meng; Kondo, Yuki; Qian, Xiao Yi; Kuroda, Shin–ichi; Mori, Tamio; Hosoi, Katsuhiko

doi:10.4028/www.scientific.net/kem.596.65

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…The atmospheric pressure low-temperature plasma reactor used was same as that previously reported [4][5] and is shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, the plasma assisted processes have become commonly used methods for the deposition of polymer-like films. We have reported the polymerization of the methacrylic monomers such as methyl methacrylate (MMA), 2-hydroxyethyl methacrylate (HEMA), methacrylic acid (MAA) and butyl methacrylate (BMA) induced by non-equilibrium atmospheric pressure Ar plasma jet [3][4][5]. These monomers were successfully polymerized with retaining the functional groups of ester or acid.…”

Section: Introductionmentioning

confidence: 99%

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Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

Yan

Hosoi²,

Kuroda

2014

AMM

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The non-equilibrium atmospheric pressure Ar plasma was applied for the polymerization of maleic anhydride (MA). The deposited films were analyzed by using Fourier transform infrared spectroscopy (FT-IR) proving the monomer was successfully polymerized with retaining the functional groups. The intensity of optical emission spectroscopy (OES) of the plasma jet was found to become weaker when the monomer was introduced into the jet. This was interpreted as the result of the energy transfer from the metastable Ar to the monomer. It was proposed that the excited MA changed into π-π* transition state to produce dimer biradicals which initiate the polymerization.

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“…The atmospheric pressure low-temperature plasma reactor used was same as that previously reported [4][5] and is shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

Yan

Hosoi²,

Kuroda

2014

AMM

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“…Before feeding the mixture of gases into the hollow inner electrode, they were passed through a mixing device to have a uniform effect (quenching) of the gases on each other. N 2 could be added through the glass capillary inserted into the hollow inner electrode for the direct injection into the plasma discharge but it was not effective [5]. Electrical Measurements.…”

Section: Methodsmentioning

confidence: 99%

“…At atmospheric pressure, a low temperature (22 to 35°C) , non-equilibrium plasma discharge generating device (CAPPLAT) fed by a high-voltage pulsed power source had already been developed and used successfully for both chemical vapor deposition (CVD) and polymer surface treatment [5,[8][9][10][11]. That device had also been commercialized under the name of "CAPPLAT" by Cresur Corporation [6].…”

Section: Introductionmentioning

confidence: 99%

Electrical and Optical Characterization of Cold Atmospheric Pressure Plasma Jet and the Effects of N<sub>2 </sub>Gas on Argon Plasma Discharge

Sharma

Hosoi²,

Mori³

et al. 2012

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In this study, we conducted experiments to investigate the electrical and optical characteristics of a non-equilibrium Ar-N2 plasma discharge at atmospheric pressure. To obtain the plasma discharge we used our indigenously designed plasma generating device named CAPPLAT (Cold Atmospheric Pressure Plasma Torch) which was manufactured by Cresur Corporation. The plasma discharge obtained with only Ar gas was quite filamentary. So, to achieve a homogeneous discharge N2 gas was admixed. The effects of different volumes of admixed N2 gas were also studied. The optical emission spectroscopy was used to study the active charged species in the plasma discharges. The further increased volume of N2 gas further suppressed the emission intensity of Ar metastables but at the same time the emission intensity of the second positive system of nitrogen molecules (N2(C3Πu) enhanced significantly. It can be concluded that in Ar- plasma discharge, argon metastables are the main energy carriers but when N2 gas is added to the feeding gas (Ar) for plasma generation, the second positive system of nitrogen molecules (N2(C3Πu) become the main energy carriers. On the other hand the addition of the N2 gas doesn’t change the electrical characteristics of plasma discharge significantly. To identify the effectiveness of the CAPPLAT as a tool for sterilization, highly environmental stress resistant bacterial (Bacillus subtilis) endospores were treated for different durations. We could successfully deactivate the population of 1.0X107 to 4.0X107 Bacillus endospores/ml. The details of this experiment are discussed in our next paper.

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“…At atmospheric pressure, a low temperature (22 to 35°C), non-equilibrium plasma discharge generating device (CAPPLAT) fed by a high-voltage pulsed power source had already been developed and used successfully for both chemical vapor deposition (CVD) and polymer surface treatment [4][5][6][7][8]. That device has also been commercialized under the name of "CAPPLAT" by Cresur Corporation [9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cold Atmospheric Pressure Plasma Jeton the Viability of <i>Bacillus subtilis</i> Endospores

Sharma

Hosoi²,

Mori³

et al. 2013

AMR

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In this study, we conducted experiments to investigate the effectiveness of a non-equilibrium Ar-N2 plasma jet generated by a Cold Atmospheric Pressure Plasma Torch (CAPPLAT) at a sinusoidal voltage of 20 kV, frequency of 30 kHz with 10 slm of Ar gas and 100 sccm of N2 gas. Highly environmental stress resistant bacterial endospores of Bacillus subtilis, dried on an agar disc were exposed to the plasma discharge from the CAPPLAT for different durations. The viability of spores after plasma exposure was checked by counting CFUs by serial dilution method. We also measured the amount of released DPA (dipicolinic acid, pyridine-2, 6-dicarboxylic acid), which is exclusively found in endospore protoplast (cortex), to confirm the disintegration of the cortex. We could successfully inactivate a population of Bacillus endospores of about 1.0 × 107 to 4.0 × 107 spores/ml.

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Functional-Group-Retaining Polymerization of Hydroxyethyl Methacrylate by Atmospheric Pressure Non-Equilibrium Plasma

Cited by 4 publications

References 7 publications

Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

Polymerization of Maleic Anhydride Induced by Non-Equilibrium Atmospheric Pressure Argon Plasma

Electrical and Optical Characterization of Cold Atmospheric Pressure Plasma Jet and the Effects of N<sub>2 </sub>Gas on Argon Plasma Discharge

Effects of Cold Atmospheric Pressure Plasma Jeton the Viability of <i>Bacillus subtilis</i> Endospores

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