Przeglądaj {{ collection }} wg Autor "Adomavičiūtė, Erika"

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  • Pozycja
    Electrospun bioactive polymer/gelatin coatings for medical application - creation and investigation
    (Wydawnictwo Politechniki Łódzkiej, 2022) Andziukeviciute-Jankuniene, Akvile; Sinkevičiūtė, Joana; Adomavičiūtė, Erika; Valeika, Virgilijus; Balciunaitiene, Aiste; Jankauskaite, Virginija
    Skin protects human body from negative external influences; however, it has property to be injured. There are a lot of different types of medical dressings, nevertheless, electrospun materials for medical applications are on demand due to nonwoven materials properties, such as large surface area, specific porosity, polymers suitability. Natural polymers for wound dressings are highly investigated not only for their antimicrobial and anti-inflammatory properties, but for electrospinning feasibility as well. The aim of this research is to develop bioactive polymer/gelatin coating from animal waste and investigate its feasibility for medical dressing. Polyvinyl butyral (PVB) and polyvinylpyrrolidone (PVP) as polymers were chosen due to their adhesive properties, solubility in various solvents andmbiocompatibility. Gelatin as bioactive polymer was chosen due to its anti-inflammatory properties. Natural Symphytum officinale (SO) extract in compositions was used. Electrospun polymeric nano/microfibers were coated with gelatin compositions. Nano/microfibers diameters and gelatin compositions droplets sizes were evaluated. It was determined that composition modification with SO has influence on used polymers nano/microfibers diameter. Plant extract addition to polymer solution induces thinner nano/microfibers. Consequently, it was ascertained that gelatin and SO composition forms high quality droplets both on PVB/SO and PVP/SO nanofibers surface.
  • Pozycja
    Melt spinning of polypropylene (PP) multifilaments yarns: effect of myrrh resin on multifilament yarns properties
    (Wydawnictwo Politechniki Łódzkiej, 2022) Bolskis, Evaldas; Adomavičiūtė, Erika; Griškonis, Egidijus
    Melt-spinning is the most widely used polymeric multifilament yarn production method. It’s easy to scale and it is highly productive. Using this method can be formed multifilament yarns with various functionalities, using additives. The aim of this research is to investigate the formation of melt-spun multifilament polypropylene (PP) yarns modified with 10% ethanolic myrrh resin extract. In this study, multifilament yarns were successfully formed from PP with a myrrh resin by melt-spinning at two different drawing ratios (1.5; 2.5). It was indicated that processing parameters have a significant influence on the multifilament linear density (tex), tenacity (cN/tex) and tensile strain (%). Modification of PP with ethanolic myrrh extract has a significant influence on the mechanical properties of the melt spun multifilament yarns.