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Titolo:
Chromatographic characterization of macroporous monolithic silica preparedvia sol-gel process
Autore:
Ishizuka, N; Minakuchi, H; Nakanishi, K; Hirao, K; Tanaka, N;
Indirizzi:
Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 Mat Chem, Sakyo Ku, Kyoto 6068501, Japan Kyoto Inst Technol, Dept Polymer Sci & Engn, Sakyo Ku, Kyoto 6068585, Japan Kyoto Inst Technol Kyoto Japan 6068585 n, Sakyo Ku, Kyoto 6068585, Japan
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
, volume: 187, anno: 2001,
pagine: 273 - 279
SICI:
0927-7757(20010831)187:<273:CCOMMS>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASE LIQUID-CHROMATOGRAPHY; CAPILLARY ELECTROCHROMATOGRAPHY; SEPARATION MEDIA; PERFORMANCE; COLUMNS; SIZE;
Keywords:
silica; monolithic column; aging; mesopore; HPLC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Nakanishi, K Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 kyo Ku, Kyoto 6068501, Japan
Citazione:
N. Ishizuka et al., "Chromatographic characterization of macroporous monolithic silica preparedvia sol-gel process", COLL SURF A, 187, 2001, pp. 273-279

Abstract

A continuous porous silica monolith prepared by the sol-gel process including phase separation was aged in a basic solvent making use of hydrolysis of urea to prepare extended mesopore structures for chromatographic applications. The dissolution-reprecipitation kinetics at the interfaces between wet gel skeletons and an external solvent affected the size and volume of pores formed within the skeletons. At above 200 degreesC, the pore size attained the macropore dimensions ( > 50 nm). The results of chromatography indicate that the monolithic silica column with wide mesopore could reduce the separation time compared to the conventional column packed with 5 mum silicaparticle. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 11:47:59