Effects of surface plasma treatment on tribology of thermoplastic polymers

Bismarck, Alexander; Brostow, Witold; Chiu, Rachel; Lobland, Haley E. Hagg; Ho, Kingsley K.C.

doi:10.1002/pen.21103

Cited by 68 publications

(39 citation statements)

References 23 publications

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“…As a result, an improvement of the mechanical, frictional, and wearing properties is observed [6,9,22,29,31], although not always together [6,8,19,21]. Most studies are performed on thermoplastics, e.g., polystyrene (PS) [15,27,29,32], ultra high molecular weight polyethylene (UHMWPE) [9,17,21,28], or polycarbonate (PC) [10,20,25,27]. In contrast, less work is focused on elastomers [7,23,24,[29][30][31], in particular about their tribological performance after plasma treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Several types of gases have been employed, which can be divided into three groups: non-reactive, like Ar [7,16,18,19] or He [20][21][22]; reactive, like H 2 [22], N 2 [6,10,23,24], O 2 [8,13,17,23], or air [25][26][27]; and precursor gases, which led to the deposition of thin layers on the substrate [20,[28][29][30]. In general, the treatments caused a variation of the crosslinking of the substrate [7,15,17,19,28] and/or modification of the surface species [7,12,13,23].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Plasma Treatments on the Frictional Performance of Rubbers

et al. 2012

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The frictional performance of several rubbers after pulsed-DC plasma treatments has been examined. In all cases, the treated rubbers showed better performance than the corresponding untreated ones. Stronger treatments, in terms of longer process time and/or higher substrate bias voltage, led to larger reductions of coefficient of friction and wear. The addition of hydrogen to the argon plasma did not show any additional positive effect. Nevertheless, different degrees of improvement were observed for different rubbers. In fact, the energy consumed during the tribotest scales with the maximum working temperature of the rubbers, indicating that the plasma treatment is more effective in the case of more sensitive rubbers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Plasma Treatments on the Frictional Performance of Rubbers

et al. 2012

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“…: flame, corona discharge, plasma, photons, electrons, ion beam or X-rays [2,3,12,13]. These methods are used to achieve changes of polymer such as formation of special functional groups at the surface, increase of surface energy, change of wettability, improvement [3,8,11,13,14].…”

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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“…The results show that the chemical composition and bonding structure of PET surface more important role than the surface roughness in controlling COF in this case. It seems that the dangling bonds formed by Ar ion bombardment cause higher COF [96]. have lower bond energy than σ states (sp 3 bonds), π states can be easily polarized to have much larger Raman scattering cross section than σ states.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Fabrication and characterization of adherent diamond-like carbon based thin films on polyethylene terephthalate by end hall ion beam deposition

Ashtijoo

Bhattacherjee

Sutarto

et al. 2016

Surface and Coatings Technology

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The application of Polyethylene terephthalate (PET) has been steadily increasing during recent years. However, its low wear resistance, high gas permeation rate and poor biocompatibility have significantly limited its applications in some specific areas. On the contrary, diamond-like carbon (DLC) possesses many unique properties such as the high hardness, low friction coefficient, high transparency, good gas barrier, excellent biocompatibility, and low synthesis temperature, which makes it an ideal coating material for modifying the surfaces of PET for applications as food and beverage containers and biomedical implants. Nevertheless, the adhesion of DLC on PET is poor due to the high stress induced by ion bombardment during DLC deposition and the large mechanical property mismatch between the coating and the substrate. Therefore, it is very important to develop techniques to lower the stress of DLC and to enhance the adhesion strength of DLC to PET.In the present thesis work, low energy end-hall (EH) ion source and element (N and Si) doping were used to deposit DLC to lower its internal stress and ion beam treatment was performed to modify the surface of PET to enhance the adhesion between DLC and PET. In addition, two different hydrocarbon gases (CH 4 and C 2 H 2 ) were used as precursors for DLC deposition in order to understand the effect of precursor gas. The structure and properties of the treated PET and deposited DLC films were characterized by various advanced techniques: The adhesion of DLC to PET was assessed using scratch testing; the composition and bonding states of DLC and treated PET were analyzed by Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and near edge X-ray absorption fine structure (NEXAFS); the hardness and Young's modulus were measured by nano-indentation; the tribological properties of the coated materials were evaluated by pin-on-disk sliding testing; and the surface tomography and surface roughness were investigated by atomic force microscopy and N forms sp 3 C-N and sp 2 C=N bonds in the films. Consequently, the hardness values decrease from 11.5 GPa for pure DLC to 7.0 GPa for N-DLC samples whereas the hardness of Si-DLC increases with increasing the silicon content. In addition, N doping can reduce residual stress of DLC and thus increases adhesion of DLC. The DLC films deposited using methane show better properties than using acetylene. By optimizing the conditions, dense, smooth, and adhesive DLC films have been deposited onto PET using EH ion source by combining N doping and O ion treatment with methane as precursor gas.iv AKNOWLEDGEMENTS

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Effects of surface plasma treatment on tribology of thermoplastic polymers

Cited by 68 publications

References 23 publications

Influence of Plasma Treatments on the Frictional Performance of Rubbers

Influence of Plasma Treatments on the Frictional Performance of Rubbers

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

Fabrication and characterization of adherent diamond-like carbon based thin films on polyethylene terephthalate by end hall ion beam deposition

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