Inorganic-organic hybrids originating from organosilane anchored onto leached vermiculite
| Autor: | Maria G. Fonseca, Albaneide Fernandes Wanderley, Ana Priscila Alves |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
organoclays
silylation vermiculite Mechanical Engineering Sodium Inorganic chemistry Infrared spectroscopy chemistry.chemical_element Vermiculite Condensed Matter Physics selective leaching chemistry.chemical_compound chemistry Mechanics of Materials Nitric acid Elemental analysis TA401-492 lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Leaching (metallurgy) Selective leaching Clay minerals Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Materials Research, Iss ahead, p 0 (2013) Materials Research, Vol 16, Iss 4, Pp 891-897 (2013) Materials Research, Volume: 16, Issue: 4, Pages: 891-897, Published: 21 MAY 2013 Materials Research v.16 n.4 2013 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
| ISSN: | 1980-5373 1516-1439 |
| DOI: | 10.1590/s1516-14392013005000076 |
| Popis: | The reactivity of clay minerals leached in grafting reactions was investigated. Precursor solids were prepared by treating the sodium vermiculites with nitric acid solutions at several concentrations. The lixiviation produced the restructured porous solids with surface area over a wide range, varying from 133 to 673 m2 g - 1. The sodium and lixiviated vermiculites reacted covalently with silylating agent, 3-aminopropyltrimethoxysilane, to attach this agent onto the inorganic surface, through the free available silanols. The products were characterized by CNH elemental analysis, infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance in the solid state for carbon and silicon. CHN data expressed by significant contents of anchored organic chains, up to 2.14 mmol g - 1, as the degree of leaching was increased. The success of this investigation is directly related to the leaching of the natural vermiculite, which is strongly influenced by the reactivity of the abundant original source. |
| Databáze: | OpenAIRE |
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