Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR Full article
Conference |
XII National Synchrotron Radiation Conference 13-18 Jul 1998 , Новосибирск |
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Journal |
Nuclear Instruments and Methods in Physics Research Section A
ISSN: 0168-9002 |
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Output data | Year: 2000, Volume: 448, Number: 1-2, Pages: 261-266 Pages count : 6 DOI: 10.1016/S0168-9002(99)00731-7 | ||
Tags | Aerogels; Deformation; Dissolution; Percolation (solid state); pH effects; Sodium compounds; Synchrotron radiation; X ray scattering | ||
Authors |
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Affiliations |
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Funding (3)
1 | Russian Foundation for Basic Research | 97-03-32471 |
2 | Siberian Branch of the Russian Academy of Sciences | |
3 | The Ministry of Education and Science of the Russian Federation | 3H-256-97 |
Abstract:
Structural deformations of three types of silica aerogels due to their dissolution in aqueous solution of NaOH at pH=13.6–13.9 have been explicitly studied in situ using small angle X-ray scattering of synchrotron radiation. For all aerogels studied the scattered intensity I is found to increase rapidly in the scattering vector range h=0.15–0.6 nm−1 that indicates the aerogel threshold disintegration. When the scattering at h=0.15 nm−1 reaches the maximum the dependency of LnI on Lnh gives a straight line with the slope critically depending on the pH of solution and, to a lesser extent, on the nature of the aerogel. The observed phenomena are discussed in terms of the percolation theory.
Cite:
Okunev A.G.
, Shmakov A.N.
, Danilyuk A.F.
, Aristov Y.I.
Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR
Nuclear Instruments and Methods in Physics Research Section A. 2000. V.448. N1-2. P.261-266. DOI: 10.1016/S0168-9002(99)00731-7 WOS Scopus РИНЦ
Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR
Nuclear Instruments and Methods in Physics Research Section A. 2000. V.448. N1-2. P.261-266. DOI: 10.1016/S0168-9002(99)00731-7 WOS Scopus РИНЦ
Dates:
Published print: | Jun 21, 2000 |
Published online: | Jun 22, 2000 |
Identifiers:
Web of science | WOS:000088282500054 |
Scopus | 2-s2.0-0034206142 |
Elibrary | 13345363 |
Chemical Abstracts | 2000:434628 |
Chemical Abstracts (print) | 133:243210 |
OpenAlex | W2129685758 |