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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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The Eco-Modification of Textiles Using Enzymatic Pretreatment and New Organic UV Absorbers

Olczyk Joanna, Sójka-Ledakowicz Jadwiga, Kudzin Marcin, Antecka Anna

Autex Research Journal

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2021

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Vol. 21, no. 3

242--251

EN

Textile fabrics were subjected to bio-pretreatment using high-activity laccase from Cerrena unicolor for comparison to standard alkaline scouring and organic absorber of ultraviolet (UV) radiation based on 1,3,5-triazine derivatives. The basic aim of the study was the development of textiles made of natural cellulose fibers (mainly flax or its blends with cotton) to provide barrier properties against UV radiation. Controlled application of enzymatic pretreatment of woven fabrics made of natural cellulose fibers allows for an efficient removal of impurities from these fibers, resulting in the improvement of sorptive properties and good penetration of dyeing agents, UV organic absorbers and other chemical modifiers, into the textile structure. In this way, products with UV-protection properties (ultraviolet protection factor >40) are obtained. These innovative barrier materials can be used for outdoor textiles that protect professional people from harmful effects of UV radiation.