Physical mechanisms of interaction of cold plasma with polymer surfaces

Bormashenko, Edward; Whyman, Gene; Multanen, Victor; Shulzinger, Evgeny; Chaniel, Gilad

doi:10.1016/j.jcis.2015.02.025

Cited by 58 publications

(37 citation statements)

References 45 publications

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“…Unfortunately, the detailed mechanisms of hydrophilization and hydrophobic recovery remain unclear . In our recent papers we have demonstrated that plasma treatment charges polymer films electrically; in doing so the characteristic times of hydrophobic recovery and surface charge loss are close …”

Section: Introductionmentioning

confidence: 99%

Relaxation spectra of polymers and phenomena of electrical and hydrophobic recovery: Interplay between bulk and surface properties of polymers

Pogreb

Loew

Bormashenko

et al. 2016

J Polym Sci B Polym Phys

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Low‐density polyethylene, polypropylene, and polycarbonate were exposed to cold air plasma treatment. The decay of electret response, hydrophobic recovery, and mechanical relaxation of polymers were studied experimentally. The three‐exponential decay kinetic model was used for the treatment of mechanical and electret responses. The characteristic time scales of mechanical and electret responses turned out to be very close. The “longest” relaxation time, extracted from the experimental study of the hydrophobic recovery, was also close to the corresponding characteristic time spans of electret and mechanical responses. The kinetics of surface processes taking place in polymers is controlled by the mobility of their functional groups, represented by the bulk relaxation spectra. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 198–205

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Section: Introductionmentioning

confidence: 99%

Relaxation spectra of polymers and phenomena of electrical and hydrophobic recovery: Interplay between bulk and surface properties of polymers

Pogreb

Loew

Bormashenko

et al. 2016

J Polym Sci B Polym Phys

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“…Appearance of polar groups on the polymer surface leads to a change in wetting behavior, thus, strengthening the hydrophilicity of treated materials [23]. However, the surface roughness is also affected by the plasma treatment that can also change its wettability [20,24]. Surface properties of plasma treated polymers depend on, e.g., gases composition, exposure time, frequency and plasma power [8,12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The first one is the reorientation of the polar groups into the bulk polymer and the second is the mobility of small polymer chain segments into the matrix [10]. Thus, the results of these processes are a decrease in surface energy and a significant decrease of surface wettability [8,10,12,13,24].…”

Section: Introductionmentioning

confidence: 99%

Influence of plasma treatment on wettability and scratch resistance of Ag-coated polymer substrates

Wojcieszak

Poniedziałek

Mazur

et al. 2016

Materials Science-Poland

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Rapid progress in thin-film coatings based on metals, which can be deposited on polymers, has been recently observed. In this work discussion on the properties of modified polymers and silver thin films deposited on polytetrafluoroethylene (PTFE) and polycarbonate (PC) substrates has been presented. Surface of these polymer substrates were exposed to argon plasma discharge. Additionally, silver thin films were deposited on their surface by electron beam evaporation method. The surfaces of the modified polymers were studied by different methods, i.e. topography, wettability and scratch resistance measurements were performed. The ageing effect of treated substrates was also discussed. It was shown that plasma modification of PTFE and PC substrates increased wettability of their surfaces. The value of water contact angle decreased of about 40 % and 25 % for PTFE and PC surface, respectively. The change of hydrophobic to hydrophilic properties was observed. Plasma modification of substrates improved adhesion between silver coating and polymer substrates. However, it did not influence wettability of Ag coating.

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“…One of those is hightemperature plasma, and generally produced by a plasma torch. 11) Here, electrons and atoms realize thermal equilibrium having little difference in their temperatures. To pro-duce such state, high electric energies are required.…”

Section: Fly Ashmentioning

confidence: 99%

Powder Characteristics of Fly Ash Beneficiated by Cold Plasma and Heat Treatment

Lee

Cho

Kwon

2016

J. Korean Ceram. Soc

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Cold plasma and heat treatment were selected as technologies to reduce unburned carbon in fly ash to less than 1.0%. Both cold plasma and heat treatment made it possible to eliminate unburned carbon to less than 1.0%. In the case of fly ash, which almost entirely eliminated unburned carbon with an ignition loss of 0.5%, heat treatment caused adhesion among particles and the BET specific surface area rapidly decreased as the mean particle size increased. On the other hand, with cold plasma, unburned carbon elimination caused the BET specific surface area to decrease and, as no adhesion occurred among particles, the mean particle size became small. Also, cold plasma treatment allowed small spherical particles confined within the unburned carbon particles to be released with the elimination of the unburned carbon frame, so that the quantity of fine particles had a tendency to slightly increase.

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Physical mechanisms of interaction of cold plasma with polymer surfaces

Cited by 58 publications

References 45 publications

Relaxation spectra of polymers and phenomena of electrical and hydrophobic recovery: Interplay between bulk and surface properties of polymers

Relaxation spectra of polymers and phenomena of electrical and hydrophobic recovery: Interplay between bulk and surface properties of polymers

Influence of plasma treatment on wettability and scratch resistance of Ag-coated polymer substrates

Powder Characteristics of Fly Ash Beneficiated by Cold Plasma and Heat Treatment

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