On Hydrophilicity Ageing of PP and PET Films Induced by Ultraviolet Radiation and Hydrogen Atoms

Akishev, Yu. S.

doi:10.2174/1876534301306010019

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…However, very few studies have intentionally used water vapor as a reactive gas for plasma surface modification, and when used, only in low concentrations . The chemistry of water vapor plasmas is still not well understood although there are models based on experimental results that suggest possible reaction mechanisms . According to a global model based on He/H 2 O plasma chemistry, water vapor plasmas are dominated by OH, O, and O 2 metastable species and water cluster ions depending on the concentration of water vapor in the gas .…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Vapor Addition on the Surface Modification of Polyethylene in an Argon Dielectric Barrier Discharge

Deynse

Geyter

Leys

et al. 2013

Plasma Processes & Polymers

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In this paper, water vapor up to 41% is added to an argon dielectric barrier discharge at medium pressure to profoundly investigate the effect of water vapor addition on the surface modification of polyethylene (PE). Contact angle measurements show that the wettability of PE significantly increases after a pure argon plasma treatment. However, the addition of water vapor to the argon feeding gas can give an extra 30% decrease in water contact angle. This extra decrease is due to the incorporation of additional oxygen containing groups such as CO, CO, OCO, and OCO. AFM results reveal that the surface roughness of PE only increases for plasma treatments with no or low water vapor concentrations. All this indicates that a water vapor based plasma can be an excellent tool for the surface activation of PE.

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Section: Introductionmentioning

confidence: 99%

Influence of Water Vapor Addition on the Surface Modification of Polyethylene in an Argon Dielectric Barrier Discharge

Deynse

Geyter

Leys

et al. 2013

Plasma Processes & Polymers

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“…Independently of the efficacy of the treatment, the reduction of Ɵ, is a transient effect, as observed in [37]. In recent studies, FTIR spectral analyses indicate that the carbon content decreases and the oxygen content increases on the surface of PET, and a large concentration of oxygenated polar functional groups is introduced into the surface by plasma treatment, which is responsible for improving its wettability [38]. Recent studies reveal the wettability issues related to PET.…”

Section: Pet Contact Angle (°)mentioning

confidence: 99%

Surface Properties and Morphology of PET Treated by Plasma Immersion Ion Implantation for Food Packaging

SantAna¹

2018

NNOA

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In this work, surface properties of PET (Polyethylene Terephthalate) modified by Plasma Immersion (PI), and Plasma Immersion Ion Implantation (PIII) were studied. Nitrogen and sulfur hexafluoride plasmas were used in a vacuum system coupled to a radiofrequency (rf) generator (13.56 MHz). Infrared spectroscopy (ATR-FTIR) detected the presence of new molecular groups on the PET surface after the treatment. Measurements of the contact angle, Ɵ, revealed a strong dependence of the surface wettability on the plasma parameters, control of which allows the production of hydrophilic or hydrophobic surfaces. The ion fluence was modelled as function of the penetration depth using suitable software (SRIM 2008) and is useful to understand the damage caused by ion implantation of the PET (ρ = 1.39 g/cm 3). The optical transmittance of the treated material in the visible region, T (λ), depends on the gas used and the electrical configuration of the plasma. Water-vapor transmission rate (WVTR) revealed an increase in the barrier properties of the treated PET. PIII technique and N2 bombardment are more appropriate than plasma immersion and SF6 bombardment to increase T (λ) of PET in the visible region.

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“…As it turned out, the air plasma treatment leads to a strong decrease of the contact angle from its initial magnitude of 93° down to 30° (see figure 16). In general, there is a so-called ageing effect [62,63], which exhibits itself as a degradation with time of the surface energy of the plasma-treated PE. However, for the case of PE, this effect is not appreciably pronounced.…”

Section: Adhesion Of the Foam To The Pementioning

confidence: 99%

On the composition of reactive species in air plasma jets and their influence on the adhesion of polyurethane foam to low-pressure polyethylene

Akishev¹,

Aponin²,

Petryakov³

et al. 2018

J. Phys. D: Appl. Phys.

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In this paper, non-thermal plasma sources based on the high-frequency sinusoidal coaxial dielectric barrier discharge (DBD) using fast flowing ambient air as feedstock gas at atmospheric pressure are described. These single- and multi-tube sources are able to generate low- and high-power turbulent plasma jets. Experimental results on both the spatio-temporal behavior of plasma inside the DBD and parameters of plasma jet(s) outside the discharge zone are presented. These results are complemented by information on the composition of reactive species generated by high-power airflow DBD. This information has been obtained from analysis of the emissive spectra of the discharge zone and plasma jet in the UV–visual region. The basic set of elementary plasma-chemical processes responsible for the generation of reactive species in the discharge zone and their further changes in hot air plasma jet is also presented. Although the oxygen concentration in the working gas is high, the concentration of reactive species in the plasma jet is enough for effective surface treatment. This is proved by the essential improvement in the adhesion of polyurethane foam (PF) to low-pressure polyethylene (PE) after treatment by the hot air plasma jet. The changes in the spatial microstructure of the scaffolds on PE surfaces taking place after plasma treatment have been established. The reasons for the adhesion improvement are discussed. The results obtained are of both scientific and practical interest, since PE pipes covered with PF are used in the housing and community sectors, the oil and gas industry, etc.

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On Hydrophilicity Ageing of PP and PET Films Induced by Ultraviolet Radiation and Hydrogen Atoms

Cited by 8 publications

References 24 publications

Influence of Water Vapor Addition on the Surface Modification of Polyethylene in an Argon Dielectric Barrier Discharge

Influence of Water Vapor Addition on the Surface Modification of Polyethylene in an Argon Dielectric Barrier Discharge

Surface Properties and Morphology of PET Treated by Plasma Immersion Ion Implantation for Food Packaging

On the composition of reactive species in air plasma jets and their influence on the adhesion of polyurethane foam to low-pressure polyethylene

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