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Wyszukujesz frazę "spheres" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Formation of fibres and spheres from chitin solution
Autorzy:
Biniaś, Dorota
Biniaś, Włodzimierz
Janicki, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1034389.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitin
fibres
phosphoric acid
regeneration
spheres
Opis:
The applications of chitin are limited due to its insolubility in most organic solvents. The chemical modification of chitin to generate new bio-functional materials can bring more desirable properties. A concentration of 5% can be obtained. We have successfully prepared chitin fibres and spheres by dissolving chitin in 85% phosphoric acid in various coagulating agents and then regenerating it in 10% sodium hydroxide. The change in molecular structure was studied by Fourier Transform Infrared Spectroscopy (FTIR). The surface morphology of different biomaterials was observed using scanning electron microscopy (SEM) and optical microscopy (OM).
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 25-32
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formowanie materiałów chitynowych przy zastosowaniu elektroprzędzenia
Formation chitin materials with the use of electrospinning
Autorzy:
Biniaś, Dorota
Biernat, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2064335.pdf
Data publikacji:
2021
Wydawca:
Akademia Techniczno-Humanistyczna w Bielsku-Białej
Tematy:
włókna
sfery
chityna
kwas fosforowy
FTIR
fibres
spheres
chitin
phosphoric acid
Opis:
As part of the research, chitin materials were obtained using the electrospinning method. For this purpose, chitin solutions were prepared in phosphoric acid and lithium chloride in an amide solvent. The coagulation of chitin materials was performed in alkaline water baths and in distilled water. As a result of the method, microspheres and microfibers of chitin were obtained. The morphological structure of the obtained materials was analyzed using a scanning electron microscope (SEM) and an optical microscope. The obtained microspheres were characterized by a similar diameter value, amounting to 195 μm. In contrast, chitin microfibers from 90 to 150 μm. The obtained materials were subjected to mid-infrared and Raman spectrophotometric tests in order to determine the influence of the solvents used on the chemical structure of native and regenerated chitin. Infrared spectroscopy studies confirmed no changes in the chemical structure of regenerated chitin. Raman spectroscopy studies confirmed no degradation of regenerated chitin. In the spectra obtained, differences were observed in the form of changes in the shape of the bands for oscillators be associated in intermolecular interactions, which is caused by changes in the supermolecular structure.
Źródło:
Polish Journal of Materials and Environmental Engineering; 2021, 2(22); 15-23
2720-1252
Pojawia się w:
Polish Journal of Materials and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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