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 ANCAN OpenAlex
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 ANCAN OpenAlex
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 |