Crystalline Structure of Chitosan Microgranules Cross-Linked with Cu2+ and Ag+ Ions

Autor:	Zofia Modrzejewska, Dorota Biniaś, Małgorzata Dorabialska, Anna Wojtasz-Paja̧k, Roman Zarzycki
Rok vydání:	2008
Předmět:	Diffraction Crystallography Crystallinity Materials science Adsorption Metal ions in aqueous solution Phase (matter) Supramolecular chemistry General Materials Science General Chemistry Crystal structure Condensed Matter Physics Ion
Zdroj:	Crystal Growth & Design. 8:4372-4377
ISSN:	1528-7505 1528-7483
DOI:	10.1021/cg700906y
Popis:	Granules with different degrees of chelating with Cu2+ and Ag+ ions were a subject of structural studies related to crystallinity. The degree of ordering of selected samples was described by the X-ray method. The WAXS diffraction patterns are presented as three bands corresponding to the crystalline phase (2θ = 10, 20, and 22°) and two broad ones that correspond to the amorphous phase (2θ = 20 and 40°). In diffraction patterns of pure chitosan granules there are mainly two peaks 2θ = 10 and 20°, which according to literature might indicate crystalline form II. From the X-ray analysis, it follows that after adsorption of both metal ions, the degree of ordering of the tested sample is reduced. This can provide an evidence of a dependence of the ordering degree, i.e., supramolecular structure of chitosan on the adsorption of both metal ions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a325391ecd196dcec3b8ff366b29a0f https://doi.org/10.1021/cg700906y Zobrazit plný text záznamu