Adsorption of oxygen-containing compounds at fluorinated graphite and fluorinated carbon fiber

Autor:	S. V. Glazkova, N. A. Zubareva, T. M. Roshchina, E. A. Tveritinova, A. D. Khrycheva
Rok vydání:	2008
Předmět:	Organic Chemistry Inorganic chemistry Metals and Alloys Infrared spectroscopy chemistry.chemical_element Oxygen Surfaces Coatings and Films chemistry.chemical_compound Adsorption chemistry Materials Chemistry Molecule Organic chemistry Dehydrogenation Graphite Gas chromatography Methylene
Zdroj:	Protection of Metals. 44:174-179
ISSN:	1608-327X 0033-1732
DOI:	10.1134/s0033173208020112
Popis:	The surface properties of fully fluorinated samples of natural graphite (FG) and carbon fiber (FCF) were studied by gas chromatography, IR spectroscopy, and static adsorption. It was found that for fluorocarbons, the contributions from the O atom (for ethers) and the OH group (for alcohols) are comparable with the contribution from the methylene unit to the retention parameters, which is typical only of highly homogeneous, hydrophobic, and nonpolar surfaces. Unusual properties of fluorocarbons compared to known hydrophobic adsorbents include weaker adsorption of secondary alcohols than ketones, their dehydrogenation products. An analysis of the retention parameters of isomeric propanols and butanols revealed that the FCF surface is accessible to the adsorption of these molecules, and is mainly formed by planar homogeneous fragments. In contrast, the FG structure is porous; the pore width is comparable with the molecule size, which makes the adsorption equilibrium more difficult to reach.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6275fb166c85e8085b2f1b92b92262fc https://doi.org/10.1134/s0033173208020112 Zobrazit plný text záznamu Plný text ve formátu PDF