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Titolo:
Preparation of Al chelate compounds with different carbon chain length andits application for surface modifier of silica
Autore:
Ueno, S; Muraoka, K; Yoshimatsu, H; Kawabata, K; Osaka, A; Miura, Y;
Indirizzi:
Ind Technol Ctr Okayama Prefecture, Okayama 7011296, Japan Ind Technol CtrOkayama Prefecture Okayama Japan 7011296 7011296, Japan Okayama Ceram Res Fdn, Bizen 7050021, Japan Okayama Ceram Res Fdn Bizen Japan 7050021 Res Fdn, Bizen 7050021, Japan Okayama Univ, Fac Engn, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 niv, Fac Engn, Okayama 7008530, Japan Okayama Univ, Fac Environm Sci & Technol, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 Sci & Technol, Okayama 7008530, Japan
Titolo Testata:
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
fascicolo: 3, volume: 108, anno: 2000,
pagine: 277 - 283
SICI:
0914-5400(200003)108:3<277:POACCW>2.0.ZU;2-S
Fonte:
ISI
Lingua:
JPN
Keywords:
Al chelate compound; surface modification; ceramics precursor; control of fine structure; metal alkoxide; silica;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Ueno, S Ind Technol Ctr Okayama Prefecture, 5301 Haga, Okayama 7011296, Japan Ind Technol Ctr Okayama Prefecture 5301 Haga Okayama Japan 7011296
Citazione:
S. Ueno et al., "Preparation of Al chelate compounds with different carbon chain length andits application for surface modifier of silica", J CERAM S J, 108(3), 2000, pp. 277-283

Abstract

Al chelate compounds with different carbon chain length were synthesized by reactions of aluminum sec-butoxide with beta-ketoesters having different carbon chain length, such as acetoacetic acid ethyl ester (n = 2), acetoacetic acid pentyl ester (n = 5), acetoacetic acid octyl eater (n = 8) and acetoacetic acid oleyl eater (n = 18), Silica was modified by aluminum sec-butoxide and these Al chelate compounds (ALK, C2, C5, C8 and C18 respectively). Then the modified silica nias dried at 100 degrees C and heated up to 400degrees C. We studied the influence of carbon chain length on the hydrophilic-hydrophobic property of dried silica by measurement of adsorption amount of water vapor. In addition the surface property of heated silica was studied by measurement of specific surface area and pore size distribution. Itwas found that the adsorption amount of water vapor on dried silica decreased with increasing the length of carbon chain such as ALK, C2 and C5. Adsorption amount of water vapor was the same on C5, C8 and C18, Porous Al2O3 was prepared from ALK and C2 by drying at 100 degrees C by hydrolysis of aluminum sec-butoxide and Al chelate compounds. Porous Al2O3 was also preparedby thermal decomposition of Al chelate compounds from C5, C8 and C18 by heating at 200 degrees C. The mechanism of pore formation changed according to the carbon chain length of Al chelate compounds. The porous Al2O3 prepared from Al chelate compounds had smaller and more uniform pore size than that prepared from aluminum sec-butoxide.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:23:42