Browsing by Author "Samková Alžběta"

Now showing 1 - 20 of 25
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    Characterization and Strength Distribution of Fibrous Glass Tapes
    (Technical University of Liberec, 2019) Militký Jiří; Venkataraman Mohanapriya; Baheti Vijaykumar; Novotná Jana; Pulicek Roman; Samková Alžběta; Voleská Karolína; Srb Pavel; Křemenáková Dana; Mishra Rajesh; Behera Bijoy
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    Classification Nanofibrous Wound Dressings by Using Textile Technique
    (TANGER Ltd., 2016) Pelcl Martin; Kovář Marek; Samková Alžběta; Novák Patrik
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    CREEP BEHAVIOR OF PARTICLE FILLED EPOXY COMPOSITES
    (2018) Baheti Vijaykumar; Karthik Daniel; Novotná Jana; Samková Alžběta; Pulicek Roman; Venkataraman Mohanapriya; Srb Pavel; Voleská Karolína; Militký Jiří
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    Effect of fibrous reinforcement on moisture absorption of plaster composites
    (2019) Samková Alžběta; Kulhavý Petr; Pechočiaková Miroslava
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    Effect of particulate fillers on creep behaviour of epoxy composites
    (Elsevier, 2020) Karthik Daniel; Baheti Vijaykumar; Novotná Jana; Samková Alžběta; Pulicek Roman; Venkataraman Mohanapriya; Srb Pavel; Voleská Karolína; Wang Yan; Militký Jiří
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    Fibre reinforcement effect on plaster composite properties
    (Technical University of Liberec, Czech Republic, 2015) Samková Alžběta; Pokorný Pavel; Kalous Tomáš; Erben Jakub; Pechočiaková Miroslava; Kryšková Petra
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    IMPACT OF THE PLASTER MEDIUM ON FIBRES DEGRADATION
    (Technická univerzita v Liberci, 2019) Samková Alžběta; Kulhavý Petr; Jirkovec Radek
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    Impact strength of Epoxy composites with fly ashe as the fillers
    (2018) Novotná Jana; Baheti Vijaykumar; Samková Alžběta
    Samples of epoxy composites containing three types of fly ash were prepared. The used epoxy resin system was low molecular weight unmodified epoxy resin based on bisphenol A, certified EPD for significant CO2 savings in production, low oil content and high content of renewable resources [1]. As fillers were used the following materials: (A). fly ashe not milled, (B). fly ashe dry milled, (C). fly ashe wett milled. All particles were added in 1-5 wt% concentrations. For composites with milled fly ashes, that the impact strength of fly ashe-polymer composites is incresing with increase in fillers weight percentage. The particle size plays important role in the impact strength.
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    Improvement of the Acoustic Attenuation of Plaster Composites by the Addition of Short-Fibre Reinforcement
    (Hindawi Publishing Corporation, 2018) Kulhavý Petr; Samková Alžběta; Petrů Michal; Pechočiaková Miroslava
    Noise attenuation is a key contemporary issue associated with the protection of human health. In this study, the possibilities of affecting acoustic properties of plaster composites by the addition of short-fibre reinforcement are described. The improvement of attenuation abilities was first verified using a simple numerical model with a pure plaster followed by using a reinforced plaster. The model results revealed a mutual correlation between the fibre ratio and dissipated acoustic energy. Hence, typical plasters used in the building industry (e.g., plaster, lime cement, and cement) are used as the base materials of the tested composites. The reinforcing dispersion in the form of short fibres (basalt and glass) with a defined length was selected after evidence from previously reported studies and after the comparison of some other fibres with respect to the trade-off between the rendered mechanical properties and cost. Transfer functions of the tested samples were measured using an impedance tube with two microphones, followed by the calculation of the total acoustic absorption. On the other hand, cement and plaster materials exhibited a low damping ability, and the absorption could be considerably increased by the addition of fibres, especially in the area around 1 kHz. In contrast, the UM plaster exhibited good damping properties even without the dispersion, and the addition of improper fibres such as glass ones possibly worsened the properties. The acoustic attenuation of the plaster composites can be improved by the appropriate combination of the base material and fibre dispersion. However, it is not possible to generalise this improvement for all possible combinations.
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    Improving Electromagnetic Shielding Ability of Plaster-Based Composites by Addition of Carbon Fibers
    (Hindawi Limited, 2018) Samková Alžběta; Kulhavý Petr; Tunáková Veronika; Petrů Michal
    The size of electromagnetic shielding in plaster composites by the means of different volume fractions of carbon fibers was studied in this paper. Conventional types of plaster, which are commonly used in industry, that is, cement, lime, gypsum, and lime cement (Thermo UM), were the base materials of the created composites. The fundamental idea of improving the electromagnetic shielding properties was verified based on a numerical simulation conducted by means of electromagnetic module in Comsol Multiphysics. The carbon microfibers with the above-critical length of 8 mm were added as the reinforcing and simultaneously shielding element into the plaster samples. From the viewpoint of the mechanical properties, fibers shorter than the critical length do not provide sufficient reinforcement. The samples were created at three different volume fractions of the dispersion and one without any reinforcement for the possibilities of their mutual comparison. The results of the carried measurement show that the electromagnetic shielding in the plaster composite grows with the increase of fiber content within the tested ratio proportionately. Also, the dependency of shielding ability on the inner material moisture has been studied. Any measureable influence of the moisture content on to the total shielding effect has not been found. Only in the lime plaster reinforced with fibers, the increased moisture could significantly decrease the shielding effect.
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    Influence of carbon fiber fraction on plaster composities ability to electromagnetic shielding
    (Technická univerzita v Liberci, 2016) Samková Alžběta; Kulhavý Petr
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    THE INFLUENCE OF FIBER REINFORCEMENT ON THE PROPERTIES OF GYPSUM PLASTERS
    (Technická univerzita v Liberci, 2017) Samková Alžběta; Kulhavý Petr; Pechočiaková Miroslava
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    INFLUENCE OF PLASMA TREATMENT ON THE RESULTING USEFUL PROPERTIES OF TAPES MADE OF GLASS FIBERS
    (ICNF, 2019) Voleská Karolína; Venkataraman Mohanapriya; Militký Jiří; Novotná Jana; Samková Alžběta
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    Micro / nanofiber scaffold for tissue engineering
    (2019) Jirkovec Radek; Holec Pavel; Kalous Tomáš; Samková Alžběta; Chvojka Jiří
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    Nanofibrous scaffold for bone tissue engineering via AC electrospinning
    (Avestia Publishing, 2019) Jirkovec Radek; Kalous Tomáš; Holec Pavel; Samková Alžběta; Chvojka Jiří
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    Optimization parameters of plaster composites
    (2016) Samková Alžběta; Kulhavý Petr; Pechočiaková Miroslava
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    Possibilities to improve electromagnetic shielding of plaster composites adding carbon fibers
    (Institute of Physics Publishing, 2017) Samková Alžběta; Kulhavý Petr; Pechočiaková Miroslava
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    Preparation of a Composite Scaffold from Polycaprolactone and Hydroxyapatite Particles by Means of Alternating Current Electrospinning
    (American Chemical Society, 2021) Jirkovec Radek; Holec Pavel; Hauzerová Šárka; Samková Alžběta; Kalous Tomáš; Chvojka Jiří
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    Preparation of a Hydrogel Nanofiber Wound Dressing
    (MDPI, 2021) Jirkovec Radek; Samková Alžběta; Kalous Tomáš; Chaloupek Jiří; Chvojka Jiří
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    Preparation of hybrid tapes for fabrication of composites
    (Binary Information Press, 2018) Venkataraman Mohanapriya; Militký Jiří; Baheti Vijaykumar; Mishra Rajesh; Pulicek Roman; Novotná Jana; Samková Alžběta; Voleská Karolína; Srb Pavel