Surface chemical and nanomechanical alterations in plasma immersion ion implanted PET

Kereszturi, Klára; Tóth, A.; Mohai, M.; Bertóti, I.

doi:10.1002/sia.2643

Cited by 13 publications

(6 citation statements)

References 15 publications

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“…The effect of exposure to plasma on PET using PIII is similar but the O/C ratio is reduced, compared to plasma treatment without PIII (Kereszturi et al 2008). This reduction in O/C ratio is consistent with the increasing carbonization of the polymer that accompanies energetic bombardment.…”

Section: Surface Structure Of Plasma Prepared Surfacesmentioning

confidence: 91%

Plasma modified surfaces for covalent immobilization of functional biomolecules in the absence of chemical linkers: towards better biosensors and a new generation of medical implants

2010

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Plasma modification and plasma polymer deposition are valuable technologies for the preparation of surfaces for the covalent binding of biomolecules for applications such as biosensors, medical prostheses, and diagnostic devices as well as surfaces for enzyme-mediated reactions. Covalency is conveniently tested by the ability of the surface to retain the attached molecules after vigorous washing with sodium dodecyl sulphate (SDS). Covalency is indicated if the fraction of protein retained lies above the curve characteristic of physisorption. Confidence in covalency is strengthened when the washing protocol is aggressive enough to remove all adsorbed protein from a control significantly more hydrophobic than the test surface. The use of linker chemistry to space the molecules from the surface is in some cases beneficial. However, the use of linker chemistry is not necessary to retain molecular function for long periods when the polymer surface is modified by energetic bombardment. The energetic bombardment retains hydrophilicity of the surface by crosslinking the subsurface, and this appears to facilitate retention of protein function. Energetic bombardment also increases the functional life of molecules immobilized and then freeze dried on plasma-modified surfaces. Analysis of the surfaces shows that the covalent binding mechanism is related to the presence of free radicals on the surface and in the subsurface regions. The unpaired electrons associated with the radicals appear to be mobile within the modified region and can diffuse to the surface to take part in binding interactions. Proactive implantable devices can make use of these principles of covalent attachment by seeding the surface of an implant with a biomolecule that elicits the desired interaction with cells and prevents undesirable responses.

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Section: Surface Structure Of Plasma Prepared Surfacesmentioning

confidence: 91%

Plasma modified surfaces for covalent immobilization of functional biomolecules in the absence of chemical linkers: towards better biosensors and a new generation of medical implants

2010

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“…The DCSBD was designed to be suitable for flat surfaces treatment in particular. The DCSBD electrode system was powered by AC high voltage source which has a frequency (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) kHz and approximately 20 kV peak-to-peak voltage. In the present study, the discharge power is 320 W and it was operated in the air in order obtain a quasi-homogeneous diffuse plasma surface.…”

Section: Plasma Treatmentmentioning

confidence: 99%

“…Whereas higher friction was recorded for PETP after argon plasma treatment [10]. The scratch resistance of PETP indicates improvements due to the effect of nitrogen plasma immersion ion implantation (PIII) [11]. In a related study, it was demonstrated that the benefits on sliding tribological properties strongly depend on the sliding conditions: the lower friction and wear after PIII treatment only occurred at low pv conditions under dry or water-lubricated sliding and not at high pv conditions [6].…”

Section: Introductionmentioning

confidence: 99%

Friction Behavior of Engineering Polymers Treated by Atmospheric DBD Plasma

Al-Maliki

Kalácska

2017

Period. Polytech. Mech. Eng.

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“…Conversely, the increase in crosslinking after atmospheric plasma treatment resulted in lower friction and wear of PEEK composites , while an argon plasma treatment resulted in higher friction of PET . The effects of nitrogen plasma immersion ion implantation (PIII) for PET were investigated in previous work, indicating better scratch resistance . In a following work, it was demonstrated that the benefits on sliding tribological properties strongly depend on the sliding conditions: the lower friction and wear after PIII treatment only occurred at low pv conditions under dry‐ or water‐lubricated sliding and not at high pv conditions .…”

Section: Introductionmentioning

confidence: 99%

Effects of atmospheric plasma treatment on adhesion and tribology of aromatic thermoplastic polymers

Al-Maliki

Zsidai

Samyn

et al. 2017

Polymer Engineering & Sci

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After cold plasma treatment of poly(ethylene terephthalate) and poly(ether‐ether ketone) surfaces by dielectric barrier discharge (DBD) under atmospheric (air) conditions, variations in surface chemistry, and morphology were investigated in relation with adhesion and tribological properties. According to XPS measurements, surface oxidation caused the formation of low molecular weight moieties of carboxylic acids. The latter resulted in more hydrophilic surfaces according to water contact angle measurements, with mainly a higher polar surface energy component. In parallel, the surface roughness of originally polished surfaces reduced due to flattening of local surface asperities after DBD. The DBD significantly improved the adhesive shear strength for different glue types in polymer/polymer and polymer/steel joints, while the best adhesion was observed for a two‐component epoxy type adhesive. Under dry sliding conditions, the coefficients of friction were lower after DBD compared to pristine samples only under mild sliding conditions (v = 0.05 m/s; p < 1 MPa.m/s), while the higher normal loads caused an increase in coefficients of friction likely due to the higher contributions of surface deformation. Most interestingly, the lower coefficients of friction after DBD were observed under oil lubrication and after cleaning the sliding track (“run‐out” condition), due to the better retention of oil at the sliding surface for plasma‐treated polymers. POLYM. ENG. SCI., 58:E93–E103, 2018. © 2017 Society of Plastics Engineers

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Surface chemical and nanomechanical alterations in plasma immersion ion implanted PET

Cited by 13 publications

References 15 publications

Plasma modified surfaces for covalent immobilization of functional biomolecules in the absence of chemical linkers: towards better biosensors and a new generation of medical implants

Plasma modified surfaces for covalent immobilization of functional biomolecules in the absence of chemical linkers: towards better biosensors and a new generation of medical implants

Friction Behavior of Engineering Polymers Treated by Atmospheric DBD Plasma

Effects of atmospheric plasma treatment on adhesion and tribology of aromatic thermoplastic polymers

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