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Wyświetlanie 1-2 z 2
Tytuł:
Superhydrophobic MWCNTs/PDMS-nanocomposite materials: Preparation and characterization
Autorzy:
Sulym, Iryna
Kubiak, Adam
Jankowska, Katarzyna
Sternik, Dariusz
Terpilowski, Konrad
Sementsov, Yuriy
Borysenko, Mykola
Derylo-Marczewska, Anna
Jesionowski, Teofil
Powiązania:
https://bibliotekanauki.pl/articles/110293.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
poly(dimethylsiloxane)
carbon nanotubes
polymer nanocomposites
superhydrophobicity
Opis:
The surface morphology, structure and hydrophobicity of low-and high-molecular weight poly(dimethylsiloxane) (PDMS) fluids physically adsorbed onto multi-walled carbon nanotubes (MWCNTs) at different weight percentages (5, 10, 20 and 40 wt.%), were studied employing X-ray diffraction (XRD), attenuated total reflectanceFouriertransforminfrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) and measurements of contact angle with water. It was found that MWCNTs agglomerate forming voids between tubes of a broad range, while adsorption of the polymer from a hexane solution results in the expected wrapping of nanotubes withPDMS chains and, further, in filling voids, as represented by SEM data. ATR-FTIR was used to investigate the possible structural changes in the polymer nanocomposites. Based on the contact anglemeasurementsvia water drop shape analysis,MWCNTs/PDMS nanocomposites were characterizedas astable,superhydrophobic materials with the maximum contact angle (CA) equal to 152°at CPDMS=40wt.%.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1394-1400
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of aluminosilicate-supported nickel and iron oxides nanocomposites in gaseous and aqueous media
Autorzy:
Goncharuk, Olena
Dyachenko, Alla
Skwarek, Ewa
Ischenko, Olena
Andriyko, Lyudmila
Borysenko, Mykola
Sulym, Iryna
Sternik, Dariusz
Kowalska, Klaudia
Marynin, Andrii
Powiązania:
https://bibliotekanauki.pl/articles/2146949.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
oxide nanocomposites
NiO/FexOy
textural properties
particle size distribution
Opis:
A series of mixed oxides was synthesized by deposition of a guest phase on a highly dispersed oxide matrix. Fumed nanooxides SiO2, Al2O3, SiO2/Al2O3, and SiO2/Al2O3/TiO2 with the specific surface area of 65-91 m2/g were selected as highly dispersed matrices. NiO/FexOy was deposited as a guest oxide using solvate-stimulated modification of a surface of fumed nanocarriers with nickel nitrate and iron(III) formate and subsequent heat treatment up to 600 °C to form NiO/FexOy. The aim of this work was to study the influence of the composition and structure of fumed oxide matrices and deposited guest phase on the behavior of the composites in gaseous and aqueous media using XRD, nitrogen adsorption and SEM/EDX, and quasi-elastic light scattering (QELS) methods. The lowtemperature nitrogen adsorption isotherms have a sigmoid shape with a narrow hysteresis loop characteristic of mesoporous materials. The specific surface area of composites varies from 65 to 120 m2/g. SEM data show denser aggregate structure of nanocomposites compared to the initial carriers. The primary particle size was in the 30-60 nm range. According to QELS data, there is a tendency to form aggregates of 100 nm - 10 µm in size in the aqueous media. The XRD method shows that the deposited metal oxides are in the form of crystalline phases of NiO with crystallites of 7-23 nm in size, but the iron oxide reflexes were not identified for NiO-containing composites.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 2; art. no. 144375
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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