Surface oxidation of polyethylene using an atmospheric pressure glow discharge with liquid electrolyte cathode

Choi, Ho‐Suk; Шикова, Т. Г.; Титов, В. А.; Рыбкин, В. В.

doi:10.1016/j.jcis.2006.04.001

Cited by 30 publications

(10 citation statements)

References 22 publications

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“…Likewise, Sanchis et al (2006), detected an increase in roughness after discharge oxygen plasma treatment [ 36 ]. The degree of LDPE modification under plasma discharge depends the voltage, pressure and discharge potency [ 37 , 38 ].…”

Section: Discussionmentioning

confidence: 99%

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

et al. 2018

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Low-density polyethylene (LDPE) waste generates an environmental impact. To achieve the most suitable option for their degradation, it is necessary to implement chemical, physical and biological treatments, as well as combining procedures. Best treatment was prognosticated by Plackett-Burman Experimental Design (PB), evaluating five factors with two levels (0.25 mM or 1.0 gL-1 glucose, 1.0 or 2.0 mM CuSO4, 0.1 or 0.2 mM ABTS [2, 20-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)], pH 4.5 ± 0.2 or 7.0 ± 0.2 and 30 or 90 day incubation), which was reproduced for 150 days. Therefore, PB identified a sequential treatment (plasma followed by fungus) for partial LDPE biodeterioration. Sheets were pretreated with glow discharge plasma (O2, 3.0 x 10−2 mbar, 600 V, 6 min.), followed by Pleurotus ostreatus biodeterioration. Fungus growth, colonization percentage, and pigment generation followed. Laccase (Lac), manganese peroxidase (MnP) and lignin peroxidase (LiP) activities were appraised. Additionally, contact angle (CA), functional group presence and changes and carbonyl and vinyl indices (Fourier transformed infrared spectroscopy) were evaluated. LDPE surface changes were assessed by Young’s modulus, yield strength, scanning electronic microscopy (SEM), Fourier transformed infrared spectroscopy (FTIR) and atomic force microscopy (AFM). Plasma discharge increased hydrophilicity, decreasing CA by 76.57% and increasing surface roughness by 99.81%. P. ostreatus colonization was 88.72% in 150 days in comparison with untreated LDPE (45.55%). After this treatment carbonyl groups (C = O), C = C insaturations, high hydrophilicity CA (16 ± 4) °, and low surface roughness (7 ± 2) nm were observed. However, the highest Lac and LiP activities were detected after 30 days (Lac: 2.817 U Lac g-1 and LiP: 70.755 U LiP g-1). In addition, highest MnP activity was observed at day 120 (1.097 U MnP g-1) only for P. ostreatus treated LDPE. Plasma favored P. ostreatus adsorption, adherence, growth and colonization (88.72%), as well as partial LDPE biodeterioration, supported by increased hydrophilicity and presence of specific functional chemical groups. The approximate 27% changes in LDPE physical properties support its biodeterioration.

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Section: Discussionmentioning

confidence: 99%

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

et al. 2018

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“…The presence of Table I. [21][22][23] In contrast to FTIR, ESCA spectra provide quantitative information on the contents of the various types of the carbon and the oxygen atoms present in the UHMWPE composites, because the percent of peak area and FWHM of ESCA spectra reflect the binding energy values and thus are commonly used in the polymer analysis. It is generally known that the γ-ray-sterilized PEs are likely to contain alkyl and peroxy radicals, 24 which form the photo-labile hydroperoxides through the hydrogen atom extraction.…”

Section: Resultsmentioning

confidence: 99%

Effect of γ-Ray irradiation on surface oxidation of ultra high molecular weight polyethylene/zirconia composite prepared byin situ ziegler-natta polymerization

et al. 2009

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Novel ultra-high molecular weight polyethylene (UHMWPE)/zirconia composites were previously prepared by the in situ polymerization of ethylene using a Ti-based Ziegler-Natta catalyst supported on to the surface of zirconia, as a bearing material for artificial joints. Tribological tests revealed that a uniform dispersion of zirconia in UHMWPE markedly increased the wear resistance. The effects of zirconia content on the oxidation behavior of the γ-ray-treated UHMWPE/zirconia composite surfaces were examined. The oxidation index that estimates the oxidation degree as the content of total carbonyl compounds was monitored using Fourier transform infrared spectroscopy-attenuated total reflectance. The changes in the surface composition due to the oxidation were confirmed by electron spectroscopy for chemical analysis. The extent of oxidation decreased with increasing zirconia content, which was attributed to the increased crystallinity as well as the decreased polymer portion of the UHMWPE/zirconia composites.

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“…The reactions shown in (12) and (13) could be enhanced by other reactive species like H 2 O 2 and HO 2 through the following secondary reaction [25]:…”

Section: Effect Of Reactive Speciesmentioning

confidence: 99%

“…Thus, the PE mesh could serve as an effective scavenger screen to hydroxyl radicals. Other oxidative reactive species could be absorbed by the PE mesh through the similar hydrogen abstraction processes [25]. The water samples were circulated and treated for the same time period with all the other experimental parameters remained the same as in the previous experiments.…”

Section: Effect Of Reactive Speciesmentioning

confidence: 99%

Mechanism of Calcium Ion Precipitation from Hard Water Using Pulsed Spark Discharges

Yang

Kim

Starikovskiy

et al. 2010

Plasma Chem Plasma Process

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Direct pulsed spark discharge treatment was found to be able to induce the precipitation of calcium ions in supersaturated hard water (Yang et al. in Water Res 44:3659, 2010). The present study investigated possible pathways for the plasma-induced precipitation. Both UV and reactive species were found not the major factors that stimulate the precipitation in present setup. A transient hot-wire method was used to investigate the effect of plasma-induced local micro-heating. Approximately 15% drop in the calcium-ion concentration was observed, indicating that the local micro-heating effect could be the major contributing factor. Additionally, a nanosecond pulsed corona discharge was used to investigate the non-thermal effect of plasma, and a maximum 7% drop in the calcium hardness was observed. Calcite with rhombohedron morphology was observed in both cases, similar to the structure observed in the spark discharge treatment case, indicating that calcium-ion precipitation process could be attributed to both the thermal and nonthermal effects produced by the plasma.

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Surface oxidation of polyethylene using an atmospheric pressure glow discharge with liquid electrolyte cathode

Cited by 30 publications

References 22 publications

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

Biodeterioration of plasma pretreated LDPE sheets by Pleurotus ostreatus

Effect of γ-Ray irradiation on surface oxidation of ultra high molecular weight polyethylene/zirconia composite prepared byin situ ziegler-natta polymerization

Mechanism of Calcium Ion Precipitation from Hard Water Using Pulsed Spark Discharges

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