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Nonwoven Carbon Fibers with Nanometric Metallic Layers as a Tool to Monitor Regenerative Processes

Stodolak-Zych Ewa, Kudzin Marcin, Kornaus Kamil, Gubernat Maciej, Kaniuk E., Bogun Maciej

Archives of Metallurgy and Materials

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2023

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Vol. 68, iss. 3

1151--1156

EN

Still unsolved is the problem of monitoring the tissue regeneration with the use of implants (substrates) in in vivo conditions. The multitude of implant materials combined with their specific immanent often limit standard diagnostic methods, i.e. X-rey or computer tomography (CT). This is particularly difficult in therapies using polymeric high-resistance substrates for tissue engineering. The aim of this study was to fabricate a non-woven carbon fiber composed of carbon fibers (CF) which were then subjected to a surface modification by magnetron sputtering. A layer of iron (Fe) was applied under inert conditions (argon) for different time periods (2-10 min). It was shown that already after 2-4 minutes of iron sputtering, the voxel surface (CF_Fe2’, CF_Fe4’) was covered with a heterogeneous iron layer observed by scanning electron microscope (SEM) with energy dispersive X-ray analysis (EDS). The longer the modification time, the more uniform the layer on the fiber surface becomes. This can be seen by the change in the wettability of the nonwoven surface which decreases from 131° for CF_Fe2 to 120° for CF_Fe10. The fibers do not change their geometry or dimensions (~11.5 um). The determination of pore size distribution by adsorption and desorption techniques (BJH) and specific surface area by nitrogen adsorption method (BET) have shown that the high specific surface area for the CF_Fe2’ fibers decreases by 10% with the increasing iron sputtering time. All the studied CF_Fe fibers show good biocompatibility with osteoblast-like cells MG-63 cells after both 3 and 7 days of culture. Osteoblasts adhere to the fiber surface and show correct morphology.

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Antibacterial properties of carbon fibers with layer deposited by magnetron technique

Kurpanik Roksana, Dzierzkowska Ewa, Gubernat Maciej, Kudzin Marcin, Boguń Maciej, Stodolak-Zych Ewa

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

103

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Influence of montmorillonite nanoparticles on thermal and mechanical properties of carbon-carbon hybrid composites based on phenolic-formaldehyde resin

Kateusz Filip, Korzec Tomasz, Zambrzycki Marcel, Cherniushok Oleksandr, Gubernat Maciej

Composites Theory and Practice

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2021

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R. 21, nr 3

96--101

EN

In this study, the effect of the addition of K-10 montmorillonite (MMT) nanoparticles on the mechanical and thermal properties of carbon-carbon composites were investigated. The composites were obtained using self-made prepregs with plain and twill 2/2, 600 g/m2 carbon fabric and phenolic-formaldehyde resin. The composites were obtained by the hot pressing technique, followed by carbonization in an inert argon atmosphere. Modified samples of the composites contained 5 wt.% MMT, homogenously dispersed in the ceramic carbon matrix. The mechanical properties, thermal conductivity and thermal capacity of the composites were determined. Raman spectroscopy and Fourier transform infrared spectroscopy were used to investigate the carbon matrix composition and structure. The results show that the addition of MMT nanoparticles increased Young’s modulus by 48%, Kirchoff’s modulus by 80.2%, but did not change the interlaminar shear strength nor the bending strength. The MMT influenced the carbon microstructure, changed the ID//IG Raman ratios, as well as the matrix composition. The addition of MMT also increased the low temperature regime of thermal conductivity and diffusivity of the samples.

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Fibrous carbon scaffold modified by polysaccharides with potential biological activity

Gubernat Maciej, Dzierzkowska Ewa, Ścisłowska-Czarnecka Anna, Boguń Maciej, Chadzińska Magdalena, Stodolak-Zych Ewa

Engineering of Biomaterials

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2020

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Vol. 23, no. 158 spec. iss.

53

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Mechanical and biological properties of carbon fiber-reinforced peek composite materials intended for laryngeal prostheses

Smółka Wojciech, Dworak Michał, Noworyta Bartłomiej, Gubernat Maciej, Markowski Jarosław, Błażewicz Marta

Engineering of Biomaterials

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2019

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Vol. 22, no. 151

2--8

EN

The work deals with the mechanical properties and biological behaviour of composite materials made of polyether ether ketone (PEEK) polymer and carbon fibers (CF) designed for laryngeal biomaterials. Two types of PEEK–based matrix composites containing carbon fibers in the form of cloth (2D) and short fibers (MD) were made. The composite samples were obtained via hot mol-ding of PEEK/CF prepregs. Mechanical durability of the composite samples aging in Ringer’s solution at 37oC was analyzed. The samples were dynami-cally loaded under bending force up to 106 cycles. The ultrasonic wave propagation method was applied to study changes in the composites. The mechanical changes were analyzed, taking into consideration the anisotropic structure of the composite samples. The layered composite samples were modified with multiwalled carbon nanotubes (CNTs). The changes in mechanical stability of the composite samples were not significant after fatigue testing up to 1·106cycles. The biological tests were carried out in the presence of hFOB-1.19-line human osteoblasts and HS-5-line human fibroblasts. The level of type I collagen produced from both types of cells was determined by ELISA test. The tests showed differen-ces between the samples with regard to the viability of the cells.

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Mechanical and biological assessment of carbon fiber-reinforced PEEK composite materials intended for laryngeal prostheses

Smolka Wojciech, Dworak Michał, Gubernat Maciej, Markowski Jarosław, Błażewicz Marta

Engineering of Biomaterials

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2019

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Vol. 22, no. 153 spec. iss.

62