Atmospheric pressure plasma treatment
of polyamide-12 foils

Hanusová, Jana; Kováčik, Dušan; Stupavská, Monika; Černák, Mirko; Novák, Igor

doi:10.1515/chem-2015-0049

Cited by 16 publications

(23 citation statements)

References 17 publications

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“…As can be clearly seen in Figure a, a dramatic change in the color of the PA12 powder was observed as the pristine PA12 powder is white and becomes light brown after a 1 h exposure, and a darker brown after 2 h. The treated and nontreated powders were also pressed into solid discs with the disc surface displaying a uniform color which reveals that only fewer powder particles were not well‐exposed (see Figure b). Activated atoms and molecules in the electric field during plasma exposure react with the modified surface, creating new oxygenated groups and new chemical functionalities …”

Section: Resultsmentioning

confidence: 99%

“…Plasma‐ a reactive medium containing free electrons, excited and ionized atoms and molecules, radicals, and metastables and VIS‐UV radiation is widely applied also for chemically modification of polymer surfaces, e.g., ultrafine cleaning, functionalization, etching, or thin film deposition . Atmospheric pressure plasma jets are used to improve the wettability and adhesion, as is low pressure plasma . Both of these techniques are investigated in this work, although the plasma jet, can be expected to have an advantage that it is more economical than the low pressure ones requiring a vacuum chamber .…”

Section: Introductionmentioning

confidence: 99%

“…Several attempts have been carried out to modify a wide range of polymers using plasma for different purposes . Studies focused on the plasma treatment of PA12 are concentrated on the bulk material, thin films, or fibers . A significant plasma effect on solid materials is limited to the topmost surface layer, the thickness of which depends on the plasma power and exposure time .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

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Polyamide 12 (PA12) powder was exposed for up to 3 h to low pressure air plasma treatment (LP‐PT) and several minutes by two different atmospheric pressure plasma jets (APPJ) i.e., kINPen (K‐APPJ) and Hairline (H‐APPJ). The chemical and physical changes resulting from LP‐PT were observed by a combination of Scanning Electron Microscopy (SEM), Hot Stage Microscopy (HSM) and Fourier transform infrared spectroscopy (FTIR), which demonstrated significant changes between the plasma treated and untreated PA12 powders. PA12 exposed to LP‐PT showed an increase in wettability, was relatively porous, and possessed a higher density, which resulted from the surface functionalization and materials removal during the plasma exposure. However, it showed poor melt behavior under heating conditions typical for Laser Sintering. In contrast, brief PJ treatments demonstrated similar changes in porosity, but crucially, retained the favorable melt characteristics of PA12 powder.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

View full text Add to dashboard Cite

show abstract

“…Due to the very few papers published on surface modification of PA12, a comparison with literature data is difficult. Two papers investigated the effect of plasma treatments on the wettability of PA12 . The treatment induced initially a large SCA reduction, but the SCA values increased over time due to ageing effects, as observed also by several authors on other polymers .…”

Section: Resultsmentioning

confidence: 90%

“…A large and diverse group of methods has been developed to modify the surface characteristics of polymers, including radiation grafting, corona, laser or plasma treatments, graft copolymerization, or modification of specific functional groups . To date, only a few papers have been published on surface modification of PA12, and they were almost limited to plasma treatments …”

Section: Introductionmentioning

confidence: 99%

Surface modification of polyamide 12 angioplasty balloons by photochemical reaction with an aromatic azide

D'Onofrio

Bignotti

2018

Polymers for Advanced Techs

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Polyamide 12 (PA12) is used in a variety of applications when low moisture absorption, good dimensional stability, and toughness are required. Polyamide 12 is one of the polymers most frequently employed to fabricate angioplasty balloon catheters; however, its high hydrophobicity and chemical inertness require the application of coatings to make its surface more hydrophilic and biocompatible. In this work, an alternative method, based on the photochemical reaction of PA12 with a hydrophilic aromatic azide, was developed. Static and dynamic contact angle measurements evidenced that the surface modification process was able to improve PA12 wettability and that the effects were retained even after 12 months from surface treatment. Polyamide 12 modification resulted in an increase of its surface free energy, as evaluated by the van Oss, Good, and Chaudhury method. X‐ray photoelectron spectroscopy confirmed the presence of the aromatic azide on PA12 surface. Finally, compliance tests showed that the modification process did not reduce the mechanical performance of balloons.

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Atmospheric pressure plasma treatment for enhancing the conducting properties of polypyrrole coated nylon fabric

Deogaonkar-Baride¹,

Palaskar²

2022

J of Applied Polymer Sci

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The present study describes a method for plasma-assisted in situ chemical polymerization of polypyrrole on nylon-66 fabric to improve adhesion and conductivity of the polypyrrole coating. Plasma generated from various gas mixtures in dielectric barrier discharge were used to modify the surface of nylon-66 fabric and investigated the influence of plasma on surface chemistry and morphology of nylon-66 fabric. Polypyrrole was then deposited over this plasma pretreated nylon fabric by using oxidative chemical polymerization to get electrically conducting nylon fabric. Surface physical and chemical changes of plasma treated nylon-66 fabric were studied by scanning electron microscopy (SEM), wettability, attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). Effect of the plasma treatment on binding strength was analyzed by studying abrasion resistance and surface resistivity. Results showed that the strongest interfacial bonding and high conductivity were achieved for He+O 2 plasma pretreated PPy coated nylon-66 fabric. Surface functional groups such as C O, C OH, COOH, and CONH were detected on plasma treated nylon-66 fabric by XPS. These surface functional groups are responsible for the improved adhesion and conductivity of PPY coating on nylon fabric by 35% (up to 2500 abrasion cycles) and 50%, respectively.

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Atmospheric pressure plasma treatment of polyamide-12 foils

Cited by 16 publications

References 17 publications

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Surface modification of polyamide 12 angioplasty balloons by photochemical reaction with an aromatic azide

Atmospheric pressure plasma treatment for enhancing the conducting properties of polypyrrole coated nylon fabric

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