High-Density Polyethylene (HDPE) Surface Treatment Using an RF Capacitive Atmospheric Pressure Cold Ar Plasma Jet

Fei, Xiaomeng; Kuroda, Shin–ichi; Mori, Tamio; Hosoi, Katsuhiko

doi:10.1088/1009-0630/15/6/16

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…A partir desse período, começou a recuperação hi-drofóbica a qual somente se estabilizou após 35 dias, sendo que o ângulo de contato correspondente à recuperação hidrofóbica final se estabilizou em 75º±3, 78º±4 e 79º±3 para amostras tratadas nas pressões de 0,01Torr, 0,1Torr e 0,5Torr, respectivamente. Conforme outros trabalhos [22][23][24][25][26], esse comportamento de maior hidrofilicidade após tratamento por plasma pode ser explicado pelo fato das espécies reativas de oxigênio e nitrogênio geradas no plasma (i.e. O + , N, N + , O, O -, OH -, O 3 , etc) interagirem fisicamente e quimicamente com superfície polimérica podendo quebrar ligações químicas de sua estrutura (i.e.…”

Section: Resultados E Discussõesunclassified

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

et al. 2018

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RESUMO Filmes de polietileno de alta densidade (PEAD) foram tratados por plasma radiofrequência (RF) de N2/O2. Foi investigado o efeito da pressão do gás de trabalho N2/O2, do plasma, na texturização superficial do filme. O plasma gerado em baixa potência (20W) permite manter a amostra em baixa temperatura (T<40°C) durante o tratamento de superfície. Os resultados mostram que a rugosidade superficial, em escala nanométrica, é muito sensível à pressão do gás de trabalho, entre 0,01Torr e 0,5Torr. Quando o material é tratado em pressão mais baixa (0,01Torr), observa-se a formação de uma estrutura superficial nanométrica de vales e picos com elevada regularidade. Por outro lado, quando o tratamento é feito em pressão mais alta (0,5 Torr), observa-se a formação de uma textura mais grossa na superfície da amostra, além da formação de ilhas de moléculas oxidadas. Em todos as condições estudadas, as amostras tornaram-se hidrofílicas após o tratamento por plasma, mantendo a característica de hidrofilicidade durante vários dias após o tratamento, retornando gradativamente à condição original de molhabilidade.

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Section: Resultados E Discussõesunclassified

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

et al. 2018

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“…The mechanisms of the surface modification by atmospheric pressure plasma jets (APPJ) are still not completely understood [ 18 ]. Different types of APPJ are used for the treatment of PE, for example, the high voltage blown arc [ 14 , 19 ], the capacitive, cold APPJ [ 20 ], DBD driven APPJ [ 21 ], or piezoelectric direct discharge (PDD) [ 22 ]. Several gases are used for APPJ treatment of PE, for example, Argon [ 23 , 24 ] or compressed dried air (CDA) [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Visualization of Activated Area on Polymers for Evaluation of Atmospheric Pressure Plasma Jets

Korzec¹,

Andres²,

Brandes³

et al. 2021

Polymers

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The treatment of a polymer surface using an atmospheric pressure plasma jet (APPJ) causes a local increase of the surface free energy (SFE). The plasma-treated zone can be visualized with the use of a test ink and quantitatively evaluated. However, the inked area is shrinking with time. The shrinkage characteristics are collected using activation image recording (AIR). The recording is conducted by a digital camera. The physical mechanisms of activation area shrinkage are discussed. The error sources are analyzed and methods of error reduction are proposed. The standard deviation of the activation area is less than 3%. Three polymers, acrylonitrile butadiene styrene (ABS), high-density polyethylene (HDPE), and polyoxymethylene (POM), are examined as a test substrate material. Due to a wide variation range of SFE and a small hydrophobic recovery, HDPE is chosen. Since the chemical mixtures tend to temporal changes of the stoichiometry, the pure formamide test ink with 58 mN/m is selected. The method is tested for the characterization of five different types of discharge: (i) pulsed arc APPJ with the power of about 700 W; (ii) piezoelectric direct discharge APPJ; (iii) piezoelectric driven needle corona in ambient air; (iv) piezoelectric driven plasma needle in argon; and (v) piezoelectric driven dielectric barrier discharge (DBD). For piezoelectrically driven discharges, the power was either 4.5 W or 8 W. It is shown how the AIR method can be used to solve different engineering problems.

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“…Non-thermal plasma treatment is considered as an effective approach to modify the surface of insulating material because of its highly reactive species, flexible operation and low pollution levels, especially, plasma treatment can be carried out at atmospheric-pressure [19][20][21][22][23][24]. Moreover, these species modify material surface only within a thin nanometer without changing the material bulk.…”

Section: Introductionmentioning

confidence: 99%

Deposition of SiC_xH_yO_zthin film on epoxy resin by nanosecond pulsed APPJ for improving the surface insulating performance

Xie¹,

Lin²,

Zhang³

2017

Plasma Sci. Technol.

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Non-thermal plasma surface modification for epoxy resin (EP) to improve the insulation properties has wide application prospects in gas insulated switchgear and gas insulated transmission line. In this paper, a pulsed Ar dual dielectrics atmospheric-pressure plasma jet (APPJ) was used for SiC x H y O z thin film deposition on EP samples. The film deposition was optimized by varying the treatment time while other parameters were kept at constants (treatment distance: 10 mm, precursor flow rate: 0.6 l min −1 , maximum instantaneous power: 3.08 kW and single pulse energy: 0.18 mJ). It was found that the maximum value of flashover voltages for negative and positive voltage were improved by 18% and 13% when the deposition time was 3 min, respectively. The flashover voltage reduced as treatment time increased. Moreover, all the surface conductivity, surface charge dissipation rate and surface trap level distribution reached an optimal value when thin film deposition time was 3 min. Other measurements, such as atomic force microscopy and scanning electron microscope for EP surface morphology, Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy for EP surface compositions, optical emission spectra for APPJ deposition process were carried out to better understand the deposition processes and mechanisms. The results indicated that the original organic groups (C-H, CC , C=O, C=C) were gradually replaced by the Si containing inorganic groups (Si-O-Si and Si-OH). The reduction of C=O in ester group and C=C in p-substituted benzene of the EP samples might be responsible for shallowing the trap level and then enhancing the flashover voltage. However, when the plasma treatment time was longer than 3 min, the significant increase of the surface roughness might increase the trap level depth and then deteriorate the flashover performance.

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High-Density Polyethylene (HDPE) Surface Treatment Using an RF Capacitive Atmospheric Pressure Cold Ar Plasma Jet

Cited by 7 publications

References 24 publications

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

Visualization of Activated Area on Polymers for Evaluation of Atmospheric Pressure Plasma Jets

Deposition of SiC_xH_yO_zthin film on epoxy resin by nanosecond pulsed APPJ for improving the surface insulating performance

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High-Density Polyethylene (HDPE) Surface Treatment Using an RF Capacitive Atmospheric Pressure Cold Ar Plasma Jet

Cited by 7 publications

References 24 publications

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

Nano-rugosidade gerada em amostras de polímero PEAD através de plasma RF de N2/O2

Visualization of Activated Area on Polymers for Evaluation of Atmospheric Pressure Plasma Jets

Deposition of SiCxHyOzthin film on epoxy resin by nanosecond pulsed APPJ for improving the surface insulating performance

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Deposition of SiC_xH_yO_zthin film on epoxy resin by nanosecond pulsed APPJ for improving the surface insulating performance