The Fracture of Plasma-Treated Polyurethane Surface under Fatigue Loading

Морозов, И. А.; Mamaev, A. S.; Bannikov, Mikhail; Beliaev, Anton Y.; Осоргина, И. В.

doi:10.20944/preprints201801.0057.v1

Cited by 6 publications

(1 citation statement)

References 20 publications

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“…Модификация этих изделий плазмой могла бы существенно улучшить их биомедицинские характеристики. Однако в этом случае преимущества покрытия оказываются не столь очевидными, так как внешняя деформация может привести к повреждению покрытия [6,12] Микроскопия. Информация о микроструктуре поверхности была получена при помощи оптического 3D-видеомикроскопа (Hirox KH-7700), а также методами атомно-силовой микроскопии (АСМ).…”

Section: Introductionunclassified

The Prospects of Using Ion-Plasma Modification of Polyurethanes for Creating Deformable Biomedical Products

Морозов¹,

Kamenetskikh²,

Beliaev³

et al. 2021

Perm Sci. Cent. J.

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Section: Introductionunclassified

The Prospects of Using Ion-Plasma Modification of Polyurethanes for Creating Deformable Biomedical Products

Морозов¹,

Kamenetskikh²,

Beliaev³

et al. 2021

Perm Sci. Cent. J.

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Polyurethane Treated in Ar/C2H2/Ar Plasma: Towards Deformable Coating with Improved Albumin Adsorption

et al. 2021

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Plasma modification of soft polymeric surfaces has many prospects in creating biomedical devices. The deformability of the obtained coatings should be studied, as the usage of such materials implies mechanical loads. Polyurethane (a two-phase synthetic polymer) treated in argon/acetylene plasma, with post-treatment in argon plasma, was investigated. A carbon-containing nanocoating (discontinuous mesh-like structures) with structural–mechanical inhomogeneities is formed by the action of Ar/C2H2 plasma. The heterogeneities of the coating are due to the complex structure of the initial substrate and short duration of treatment; as the treatment time increases, the coatings become homogeneous, but their stiffness rises. The treated surfaces in the uniaxial tensile state have micro and/or nanocracks in certain cases of plasma treatment. This is associated with an increased elastic modulus of the coatings. The coatings without cracks have regions with sufficiently alternating stiffness. Post-treatment in argon plasma increases wettability and free surface energy, positively affecting the adsorption of albumin. The stiffness of such coatings increases, becoming more homogeneous, which slightly reduces their crack resistance. Thus, plasma coatings on soft polymers operating under mechanical loads without causing damage should have sufficiently low stiffness, and/or structural-mechanical heterogeneities that provide redistribution of stress.

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Low Energy Implantation of Carbon into Elastic Polyurethane

et al. 2020

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Ion modification of polymeric materials requires gentle regimens and subsequent investigation of mechanical and deformation behavior of the surfaces. Polyurethane is a synthetic block copolymer: A fibrillar hard phase is inhomogeneoulsy distributed in a matrix of soft phase. Implantation of carbon ions into this polymer by deep oscillation magnetron sputtering (energy—0.1–1 keV and dose of ions—1014–1015 ion/cm2) forms graphene-like nanolayer and causes heterogeneous changes in structural and mechanical properties of the surface: Topography, elastic modulus and depth of implantation for the hard/soft phase areas are different. As a result, after certain treatment regimens strain-induced defects (nanocracks in the areas of the modified soft phase, or folds in the hard phase) appear on the surfaces of stretched materials. Treated surfaces have increased hydrophobicity and free surface energy, and in some cases show good deformability without any defects.

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The Fracture of Plasma-Treated Polyurethane Surface under Fatigue Loading

Abstract: Plasma treatment of soft polymers is the promising technique to improve biomedical

Cited by 6 publications

References 20 publications

The Prospects of Using Ion-Plasma Modification of Polyurethanes for Creating Deformable Biomedical Products

The Prospects of Using Ion-Plasma Modification of Polyurethanes for Creating Deformable Biomedical Products

Polyurethane Treated in Ar/C2H2/Ar Plasma: Towards Deformable Coating with Improved Albumin Adsorption

Low Energy Implantation of Carbon into Elastic Polyurethane

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