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Titolo:
Synthesis of submillimeter-thick films of surfactant templated mesoporous silica
Autore:
Nagamine, S; Endo, A; Nakaiwa, M; Nakane, T; Kurumada, K; Tanigaki, M;
Indirizzi:
Natl Inst Mat & Chem Res, Dept Chem Syst, Tsukuba, Ibaraki 3058565, Japan Natl Inst Mat & Chem Res Tsukuba Ibaraki Japan 3058565 aki 3058565, Japan Kyoto Univ, Fac Engn, Dept Chem Engn, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 ngn, Dept Chem Engn, Kyoto 6068501, Japan
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
fascicolo: 2, volume: 43, anno: 2001,
pagine: 181 - 189
SICI:
1387-1811(200104)43:2<181:SOSFOS>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESOSTRUCTURED MATERIALS; OPTICALLY TRANSPARENT; SOLVENT EVAPORATION; LAMELLAR SILICAS; POROUS SILICA; PORE-SIZE; MCM-48; CONVERSION; PLATES;
Keywords:
mesoporous silica; template; surfactant; solvent evaporation method; morphology; submillimeter-thick film;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Endo, A Natl Inst Mat & Chem Res, Dept Chem Syst, Higashi 1-1, Tsukuba, Ibaraki 3058565, Japan Natl Inst Mat & Chem Res Higashi 1-1 Tsukuba Ibaraki Japan 3058565
Citazione:
S. Nagamine et al., "Synthesis of submillimeter-thick films of surfactant templated mesoporous silica", MICROP M M, 43(2), 2001, pp. 181-189

Abstract

Submillimeter-thick mesoporous silica films using tetraethoxysilane (TEOS)as a silica source and the hexagonal mesophase of cetyltrimethylammonium chloride as a template were prepared by solvent evaporation method. The effects of H2O/TEOS molar ratio and drying temperatures on the macroscopic morphology and mesostructure were investigated. Higher H2O/TEOS ratio and higher drying temperature gave a more transparent and smooth-surfaced product. With increasing H2O/TEOS ratio, the order of the mesostructure in the product film was reduced, resulting from the slow formation of surfactant mesostructure and fast silicate gelation. The pore size showed an increase with increasing H2O/TEOS ratio, suggesting mediation by the water layer between the micellar surface and the silicate. The drying temperature affected the rate of silicate condensation and the solvent evaporation, both factors that influenced the mesostructuralization of surfactant molecules. A high dryingtemperature facilitated the gelation of silicate rather than the evaporation of solvent, resulting in a less ordered mesostructure. (C) 2001 ElsevierScience B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 15:09:50