Influence of ethanol vapor addition on the surface modification of polyethylene in a dielectric barrier discharge

Deynse, Annick Van; Morent, Rino; Leys, Christophe; Geyter, Nathalie De

doi:10.1016/j.apsusc.2017.05.111

Cited by 30 publications

(22 citation statements)

References 58 publications

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“…To evaluate the stability of the proteins during this time, the samples were kept at 5 C for 24 h after plasma treatment ( Figure S5 Argon plasma surface interactions include breaking chemical bonds, removing atoms, and generating ions and free radicals on the sample surface. 30,31 We had assumed that hydrogen plasma would provide the best results due to the higher proton transfer to the analyte.…”

Section: Resultsmentioning

confidence: 99%

“…The argon plasma produces active radical sites on the surface of the analyte that absorb oxygen and nitrogen molecules present in the atmosphere. 27,31 This process results in a higher concentration of chemical bonds being formed, whereas, with the nitrogen plasma, a lower concentration of radical sites is produced on the protein surface. Thus, the nitrogen plasma has a lower yield.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

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Protein ion yield enhancement in matrix‐assisted laser desorption/ionization mass spectrometry after sample and matrix low‐pressure glow discharge plasma irradiation

Hajiani

Ghassempour

Shokri

2020

Rapid Comm Mass Spectrometry

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Rationale Plasma‐assisted ionization is widely used in mass spectrometry; in this study, a low‐pressure glow discharge is introduced as a new method to improve the detection of large proteins, and bovine serum albumin (BSA) is used as a protein model. The treatment of analyte, matrix, and the matrix/analyte mixture is evaluated under optimal conditions. Methods Low‐pressure radio‐frequency capacitively coupled plasma (RF‐CCP) treatment is utilized in the sample preparation step of matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) to enhance the protein MALDI ion signal. Plasma treatment can be an effective tool for enhancing the non‐covalent binding of the analyte with the matrix, incorporation of the analyte into the matrix, production of matrix/analyte crystals, and analyte protonation through plasma activation, resulting in an improved MALDI ion signal. Results Fourier‐transform infrared (FTIR) spectroscopy allows us to distinguish between the functional groups of plasma‐treated and control samples. In addition, optical emission spectroscopy (OES) determines the plasma species, and zeta potential analysis characterizes the potential difference between plasma‐treated and control samples before MALDI‐TOF MS analysis. Plasma‐treated BSA can provide a five‐times enhancement of ion intensity. The combination of the plasma‐treated analyte with the plasma‐treated matrix leads to an increase in the ion intensity by a factor of 14. Conclusions Low‐pressure glow discharge plasma treatment greatly enhances MALDI ion signals, with a noticeable increase in incorporation, co‐crystallization, protonation, and the concentration of the sample functional groups.

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Section: Resultsmentioning

confidence: 99%

Section: Ftir Spectroscopymentioning

confidence: 99%

Protein ion yield enhancement in matrix‐assisted laser desorption/ionization mass spectrometry after sample and matrix low‐pressure glow discharge plasma irradiation

Hajiani

Ghassempour

Shokri

2020

Rapid Comm Mass Spectrometry

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“…Ulla Konig et al [34] mixed H 2 O in H 2 plasma to modify PET and got a stable 43° water contact angle (WCA) after storage in air for about 2 weeks. Annick Van Deynse et al [35] added 2% of ethanol to the nitrogen plasma in vacuum-based DBD discharge and obtained a stable WCA at 7.5 ± 1.4° even after being stored in ambient air at a temperature of 20 °C, the relative humidity of 50% for a period of 45 days. Recently, our group also reported [36] that the treated PE was stable at a high surface energy after 3-month aging if they were treated by Ar+acrylic acid, Ar+allylamine and Ar+ethanol in an atmospheric-based roll-to-roll DBD discharge.…”

Section: Introductionmentioning

confidence: 99%

Pre-grafted Group on PE Surface by DBD Plasma and Its Influence on the Oxygen Permeation with Coated SiOx

Yang

Wang

et al. 2019

Molecules

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In this paper, we report on polyethylene (PE) film modified by atmospheric dielectric barrier discharge (DBD) plasma prior to the deposition of SiOx coating to improve its barrier properties. Three kinds of monomers: allylamine, acrylic acid, and ethanol, are used to modify the PE surface. For comparison, Ar and O2 plasma pre-treatments are also performed. It is found that with the addition of a monomer in the Ar DBD plasma, the grafted active groups on PE surfaces lead to dense, pinhole-free growth of the SiOx film. The oxygen transmission rate (OTR) decreases from 700 cc/m2·day·atm. for the pristine to ca. 70 cc/m2·day·atm. for the pretreatment-coated PE, which is more than a 10-fold reduction. The relationship between the grafted monomer and the great decrease of OTR is then explored via chemical composition by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and via morphology observation by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The results show that the grafted functional groups of -NH2, -COOH and -OH increase the surface energy and promote the nucleation of Si–O radicals on polymeric surfaces, and the formation of network and cage structures in SiOx film contributes to the significant improvement of OTR.

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“…This technique consists in the application of a high potential difference between two electrodes, where at least one of them is coated by a dielectric material, which results in the emergence of plasma microfilaments on the surface of the insulator material used 1 . This technique is already widely used to the superficial modification of polymers, since it transforms hydrophobic polymeric materials into hydrophilic without deteriorating its internal structure [2][3][4] . It is also used for film deposition 5,6 , dental treatments and dermatological treatments 7 .…”

Section: Introductionmentioning

confidence: 99%

Triple Langmuir Probe for Diagnosis of Plasma Produced by Dielectric Barrier Discharge of Parallel Plates in Atmospheric Pressure

I¹,

J²,

A³

et al. 2019

Preprint

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This work aimed to characterize a DBD plasma equipment through optical and electrical measurements, seeking to obtain a greater knowledge of the plasma production process and how it behaves through the adopted parameters, such as frequency and voltage applied between electrodes, at a fixed distance of 1.7 mm. In order to measure them, three different characterization techniques were applied. The first method was the Lissajous figures, a technique quite effective for a complete electrical characterization of DBD equipment. The second technique used was the Optical Emission Spectroscopy, a tool used for the diagnosis of plasma, being it possible to identify the excited species produced in filamentary and diffuse discharge in the plasma. And finally, the triple Langmuir probe technique was used to obtain the electron temperature and electron density. Based on this study, it was possible to identify the equipment efficiency in different regimes. The electron temperature measurement for both systems analyzed were 27.96 eV and 20.69 eV to the filamentary and diffuse regimes, respectively. The density of electrons number to these regimes were 1.09 × 1021 m−3 and 1.56 × 1021 m−3.

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Influence of ethanol vapor addition on the surface modification of polyethylene in a dielectric barrier discharge

Cited by 30 publications

References 58 publications

Protein ion yield enhancement in matrix‐assisted laser desorption/ionization mass spectrometry after sample and matrix low‐pressure glow discharge plasma irradiation

Protein ion yield enhancement in matrix‐assisted laser desorption/ionization mass spectrometry after sample and matrix low‐pressure glow discharge plasma irradiation

Pre-grafted Group on PE Surface by DBD Plasma and Its Influence on the Oxygen Permeation with Coated SiOx

Triple Langmuir Probe for Diagnosis of Plasma Produced by Dielectric Barrier Discharge of Parallel Plates in Atmospheric Pressure

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