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Type: Artigo de periódico
Title: Zinc phyllosilicates containing amino pendant groups
Author: da Fonseca, MG
da Silva, EC
Junior, RSAM
Arakaki, LNH
Espinola, JGP
Airoldi, C
Abstract: Two new zinc silicate hybrids were synthesized via sol-gel process from the reaction of zinc ions with trialkoxyaminesilanes in aqueous basic medium at room temperature and at 373 K. The inorganic-organic hybrids obtained, named SILZn (x = 1 or 2) are related to 3-aminopropyl- and N-propylethylenediaminetrimethoxysilane, respectively. From nitrogen content, the number of pendant moles of organic groups in the matrices SILZnx (x = 1 to 2) were determined as 5.14 and 3.25 mmol g(-1), respectively. The thermogravimetric curves showed mass losses of 50.7% and 58.0% for the same sequence of hybrids, to give the oxides as residue. X-ray diffraction patterns gave basal distances of 2065 and 2814 pm for SILZnx (x = 1, 2), with well-formed particles of irregular shapes and sizes, as a characteristic of such material obtained from sol-gel process. The infrared spectra confirmed the attachment of the organic moieties on siloxane groups on the inorganic framework. (C) 2004 Elsevier Inc. All rights reserved.
Subject: zinc
inorganic-organic hybrid
Country: EUA
Editor: Academic Press Inc Elsevier Science
Rights: fechado
Identifier DOI: 10.1016/j.jssc.2004.02.026
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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