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Wyświetlanie 1-3 z 3
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:
Wpływ domieszkowania halogenkami metali alkalicznych na właściwości warstw perowskitowych w ogniwach słonecznych
The impact of alkali metal halide doping on the properties of perovskite layers in solar cells
Autorzy:
Szwanda, Agata
Starowicz, Zbigniew
Janicki, Jarosław
Fryczkowski, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/24964490.pdf
Data publikacji:
2023-12
Wydawca:
Uniwersytet Bielsko-Bialski
Tematy:
perowskity
ogniwa słoneczne
halogenki metali
domieszkowanie
perovskite
solar cells
metal halides
doping
Opis:
Perovskite cells are a new generation of solar cells that have gained significant attention in the field of photovoltaics due to their unique properties and potential benefits. Perovskites are a class of materials that have a characteristic crystal structure known as the perovskite structure. The typical chemical formula of perovskite is ABX3, where 'A' and 'B' are cations that differ in size, and 'X' is an anion, most often halogen. Doping with alkali metals in perovskite materials has shown a significant improvement in the efficiency of the solar cell, which is confirmed by numerous scientific studies. The addition of rubidium bromide and other alkali metals, such as lithium, sodium and potassium, affects the microstructure, electronic and optical properties of perovskites, which is crucial for the efficiency and stability of solar cells. The paper presents research results on doping with alkali metals for inorganic perovskite cells based on CsPbBr3. The process of doping with alkali metals was carried out in various stages of creating a Perovskite cell. The work presents the influence of the dopant on the structure of the perovskite and the obtained cell, as well as its optical and electrical properties. The conducted research indicates a positive effect of the addition of rubidium bromide, both in the phase of creating the lead bromide layer and during the application of cesium bromide. The most promising is the admixture of 9% rubidium bromide in the cesium bromide layer. In this way, the applied dopant is located in the perovskite structure, changing its optical and electrical properties.
Źródło:
Polish Journal of Materials and Environmental Engineering; 2023, 6(26); 66-78
2720-1252
Pojawia się w:
Polish Journal of Materials and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation and properties of dbc/pla microfibres
Autorzy:
Biniaś, Dorota
Biniaś, Włodzimierz
Machnicka, Alicja
Janicki, Jarosław
Hałuszka, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/1034598.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
PLA
antibacterial activity
dibutyrylchitin
electrospinning
microfibres
Opis:
In this study, a solution of dibutyrylchitin (DBC)/polylactide (PLA) blend micro and nanofibres were successfully fabricated using blends of 2,2,2-trifluoroethanol (TFE) as solvents. Fibres were produced from the solutions by electrospinning. The DBC/PLA blend solutions in various ratios were studied for electrospinning into micro/nanofibres. The morphology of the micro and nanofibres was observed by scanning electron microscope (SEM). The biggest diameters of DBC/PLA fibres were obtained for the blended microfibres in ratios of 10/90 and 25/75. The smallest diameter was observed for pure polymers. The antibacterial properties were examined for materials obtained by electrospinning. In the experiments, materials with antibacterial properties were made. It is likely that the electrospun micro and nanofibres will be used in the native extracellular matrix for tissue engineering.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 5-13
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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