dc.contributor | Universidade Federal de Mato Grosso do Sul (UFMS) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:22:41Z | |
dc.date.accessioned | 2022-10-05T16:18:02Z | |
dc.date.available | 2014-05-20T15:22:41Z | |
dc.date.available | 2022-10-05T16:18:02Z | |
dc.date.created | 2014-05-20T15:22:41Z | |
dc.date.issued | 2003-02-28 | |
dc.identifier | Materials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 78, n. 3, p. 835-839, 2003. | |
dc.identifier | 0254-0584 | |
dc.identifier | http://hdl.handle.net/11449/33626 | |
dc.identifier | 10.1016/S0254-0584(02)00452-2 | |
dc.identifier | WOS:000179839900040 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3905920 | |
dc.description.abstract | The physicochemical properties and morphology of spongolite, a fibrous hollow material from Mato Grosso do Sul State (Brazil) have been studied. The results of thermal analysis, scanning electron microscopy (SEM), X-ray diffraction and NMR spectroscopy indicated that external and internal surfaces of silica spicules are covered by silica gel layers. The water evolved in the range 120-350degreesC is the result of silanol groups condensation to siloxane bonds. Total homogenization of the needles is achieved by heating spongolite over 900degreesC. This mineral may be considered as a natural composite material containing surface-immobilized reactive species. The presence of active silica gel layers opens the possibilities of attaching functional groups to spongolite surface. (C) 2002 Elsevier B.V. B.V. All rights reserved. | |
dc.language | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation | Materials Chemistry and Physics | |
dc.relation | 2.210 | |
dc.relation | 0,615 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | spongolite | |
dc.subject | silica | |
dc.subject | composite material | |
dc.subject | spongiolite | |
dc.title | Physicochemical properties and morphology of spongolite from Mato Grosso do Sul (Brazil) | |
dc.type | Artigo | |