Surface modification of polyimide films using unipolar nanosecond-pulse DBD in atmospheric air

Shao, Tao; Zhang, Cheng; Long, Kaihua; Zhang, Dongdong; Wang, Jue; Yan, Ping; Zhou, Yi

doi:10.1016/j.apsusc.2010.01.045

Cited by 170 publications

(75 citation statements)

References 37 publications

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“…A stable nonthermal discharge was seen at a large gap of 23 mm. The applied voltage was observed to be sinusoidal and the total current in the dielectric barrier discharge consists of filamentary streamers, which may trigger photo ionization [36]. The dielectric material plays a key role in the operation by limiting the charge and preventing arcing [37,38], which is particularly important for large discharge gaps and high voltages.…”

Section: Ha Degradation Kinetic Studymentioning

confidence: 99%

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Sarangapani¹,

Lü²,

Behan³

et al. 2018

Journal of Industrial and Engineering Chemistry

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A B S T R A C TIn this study an atmospheric air plasma reactor was studied for the degradation of HA and THMs in water. Plasma treatment showed significant breakdown efficacies for HA and THMs. At an applied voltage of 80 kV about 93% of HA and >70% of THMs were degraded after 15 min and 30 min treatment time respectively, with the degradation following a first order kinetic model. Plasma induced reactive species including nitrates and H 2 O 2 were quantified in the treated water. The results of FTIR analysis revealed that the molecular structure of HA was altered by the plasma treatment, with a decrease in aromaticity observed.

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Section: Ha Degradation Kinetic Studymentioning

confidence: 99%

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Sarangapani¹,

Lü²,

Behan³

et al. 2018

Journal of Industrial and Engineering Chemistry

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“…In order to examine the changes of functional carbon groups on the surfaces, deconvolution analysis of the C1s peaks were executed; the results are shown in Figure 13 and Table 2. It is noted that C1s spectra of un-fluorinated PI had four peaks, namely, C-C/C-H, C-N, C-O, and C-N, which respectively corresponded to the binding energies of 284.7, 285.6, 286.3, and 288.6 eV [24,25]. In addition to the above four peaks, the C1s spectra of surface fluorinated PI incorporated two new peaks, at the binding energies of 287.1 and 289.5 eV, which corresponded to the C-F n and C-F peaks [26], respectively.…”

Section: Surface Morphology and Chemical Structurementioning

confidence: 99%

“…In recent years, several groups have modified polymers' surface chemical composition with the help of plasma in order to increase their adhesion or hydrophilicity [24][25][26][27]. During plasma processing, ion bombardment breaks chemical bonds in the polymer's backbones, while radicals enable functional groups to be grafted onto the polymer's surface.…”

Section: Introductionmentioning

confidence: 99%

Enduring and Stable Surface Dielectric Barrier Discharge (SDBD) Plasma Using Fluorinated Multi-Layered Polyimide

Bian

Wang

2018

Polymers

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Abstract:In this work, multi-layered polyimide (PI) films were surface fluorinated at 328 K and 0.05 MPa using F 2 /N 2 mixture with 20% F 2 by volume, for a fluorination time of 0, 30 and 60 min, respectively. Then, they were subjected to discharge plasma as barrier dielectrics of surface dielectric barrier discharge (SDBD) at ambient atmospheric air. The dielectric lifetime of SDBD greatly extends after 60 min surface fluorination. In addition, optical emission spectroscopy (OES) results indicate that during the plasma processing, SDBD with fluorinated PI can obtain more stable plasma parameters, including gas temperature and electron temperature. Dielectric surface properties were further evaluated by infrared thermography, scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). It is considered that both physical and chemical effects lead to the extension of dielectric lifetime. The physical effect is reflected in low surface temperature and increased surface roughness, while the chemical effect is reflected in the graft of fluorine groups.

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“…[1][2][3][4][5] The benefits from utilizing CAPs include the generation of a high density plasma at room temperature which reduces the need for expensive vacuum and confinement facilities. There have been many studies carried out in associated fields to advance practical applications and fundamental theoretical work.…”

Section: All Article Content Except Where Otherwise Noted Is Licensmentioning

confidence: 99%

Electron heating and mode transition in dual frequency atmospheric pressure argon dielectric barrier discharge

et al. 2017

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Plasma ionization, excitation, mode transitions and associated electron heating mechanisms in atmospheric pressure dielectric barrier discharges (DBD) driven by dual radio frequency sources are investigated in this paper. The electrons are found to be heated mainly by the high frequency component in the plasma bulk when discharged in α mode. On the contrary, the low frequency component is primarily responsible for heating in the sheath which is caused by intense motion in the sheath. It was also found that variation of the lower frequency component ratio could effectively modulate the electron energy distribution as determined from time averaged EEDF. The results above have demonstrated that the independent control of plasma parameters via non-linear synergistic effect between the dual frequency sources can be achieved through reasonable selection of processing parameters.

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Surface modification of polyimide films using unipolar nanosecond-pulse DBD in atmospheric air

Cited by 170 publications

References 37 publications

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Humic acid and trihalomethane breakdown with potential by-product formations for atmospheric air plasma water treatment

Enduring and Stable Surface Dielectric Barrier Discharge (SDBD) Plasma Using Fluorinated Multi-Layered Polyimide

Electron heating and mode transition in dual frequency atmospheric pressure argon dielectric barrier discharge

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