Розділ 1. Композиційні матеріали на основі полімерів (матеріали, технології, обладнання, вибори)

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https://ela.kpi.ua/handle/123456789/61992

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Перегляд Розділ 1. Композиційні матеріали на основі полімерів (матеріали, технології, обладнання, вибори) за Автор "Myronyuk, Oleksiy"

Зараз показуємо 1 - 6 з 6
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    Expanding perlite materials to obtain coatings that repel water
    (Liha-Pres, 2023) Myronyuk, Oleksiy; Baklan, Denys
    This paper explores a solution to the complex scaling, high cost and low environmental resistance associated with superhydrophobic coatings. By using organic coating technology, the paper demonstrates the possibility of obtaining highly water-repellent surface coatings based on expanded perlite and regenerated adsorbent. The study characterizes the properties of the coatings through various techniques and concludes that they serve as a good base coat for creating superhydrophobic volumetric hierarchical coatings. Additionally, the research shows that using an adsorbent for used refined sunflower oil is as effective as using freshly ground expanded perlite.
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    Nanosized additives and their impact on the fire resistance of coatings
    (Liha-Pres, 2023) Barrat, Silvère; Myronyuk, Oleksiy
    The study investigated the impact of different nanosized additives on the fire resistance properties of intumescent coatings. The results showed that the addition of organically modified montmorillonite and hydrophobized silica reduced the fire resistance properties of the coatings. This was due to the expansion processes being shifted to higher temperatures, which increased the time of direct heating of the substrate. However, minor concentrations of organically modified montmorillonite significantly changed the structure of the coatings and increased their specific heat insulation properties. The study also observed that nanosized additives had an effect on the expansion factor and foam structure of the coatings. This effect was suggested to be due to the complex influence of the nanoparticles on the bubble growth processes through the modification of melt viscosity. Overall, the study highlights the importance of carefully selecting the type and concentration of nanosized additives when designing intumescent coatings for fire protection applications.
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    Occurrence of microplastics in soil in recreational, residential, and industrial areas influenced by human activities
    (Liha-Pres, 2023) Tunali Mehmet Meric; Myronyuk, Oleksiy
    Plastic pollution affects ecosystems worldwide, with microplastics (MPs) being a major concern. This study evaluates MP abundance in soils impacted by human activities in different areas in Istanbul. Results indicate recreational areas have the highest MP content, while residential areas have the lowest. Industrial areas have intermediate levels. Particle shapes vary by category, with fibers most prevalent in recreational areas. FT-IR spectrometry analysis identified the types of MPs present, with the recreational areas containing polymers undergoing hydrolysis. The industrial zone’s MP contamination was recent and relatively clean, while the PE plastic in Dilovası showed little weathering.
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    The combined effects of UV radiation and water flow on the deterioration of water-repellent coatings with textures
    (Liha-Pres, 2023) Myronyuk, Oleksiy; Baklan, Denys; Rodin, Aleksej; Zuo Yong
    A study analyzed micro- and nanotextured coatings resistance to UV radiation, water immersion, and flow. The coatings were created using modified calcium carbonate microparticles and treated colloidal silica nanoparticles. The study compared the aging of polymeric materials under UV radiation to hydrophobized particles and proposed a mechanism for organo-mineral coatings deterioration.
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    The effect of pyrogenic SIO2 nanoparticles on the photodegradation of polymer coatings when exposed to UV irradiation
    (Liha-Pres, 2023) Myronyuk, Oleksiy; Baklan, Denys; Bilousova, Anna
    The study investigates the impact of functionalized silica nanoparticles on the photodestruction of styrene acrylic polymer-based coatings. The research uses infrared spectroscopy, ablation speed, and water contact angle measurements to analyze the UV degradation of thin layer coatings under accelerated aging conditions. HALS amine loaded coatings are used as a reference. Results show that the photodegradation of the silica nanoparticles-polymer composite thin film coatings is influenced by two factors: screening of UV radiation and increased polymer hydrophilization speed. At nanoparticle loads over 15 wt. %, the thickness ablation speed decreases from 1.3 to 1.2 μm/h, and the contact angle sharply drops to 40 from the initial 89 within the first 30 minutes of exposure.
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    Thin film polymer composites incorporating red mud particles as agents for forming textured surfaces with water repellent properties
    (Liha-Pres, 2023) Myronyuk, Oleksiy; Baklan, Denys; Li Che
    This study explores a potential approach to derive the foundation for water-resistant coatings from red mud. The process involves annealing to remove the water-soluble components of the waste. The research demonstrates that the utilization of stearic acid as a water-repellent agent yields the highest contact angle of 143. The findings indicate that red mud could be a viable source for producing hierarchical systems capable of achieving hydrophobicity, in addition to the conventional particulate fillers.