Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/101489
Type: Artigo
Title: Micro- and nanocomposites of Keggin heteropolymetalates in cellulose esters
Author: Oliveira, Francílio de C.
Schneider, José
Siervo, Abner de
Landers, Richard
Plepis, Ana M. G.
Pireaux, Jean‐Jacques
Rodrigues‐Filho, Ubirajara Pereira
Abstract: Composites of Keggin heteropolymetalates have been prepared and characterized by SEM, XPS, P-31-magic angle spinning/nuclear magnetic resonance and differential scanning calorimetry. The phosphotungstic acid and phosphomolybdic acid form nanocomposites where the oxocluster structure is preserved and is highly dispersed over the material, probably inserted between the polymeric chains. Phosphovanadotungstic clusters suffer partial decomposition during composite formation, resulting in a biphasic microcomposite. The decomposition product, phosphotungstic acid presents surface segregation as shown by comparison of XPS and nuclear magnetic resonance results.
Composites of Keggin heteropolymetalates have been prepared and characterized by SEM, XPS, P-31-magic angle spinning/nuclear magnetic resonance and differential scanning calorimetry. The phosphotungstic acid and phosphomolybdic acid form nanocomposites where the oxocluster structure is preserved and is highly dispersed over the material, probably inserted between the polymeric chains. Phosphovanadotungstic clusters suffer partial decomposition during composite formation, resulting in a biphasic microcomposite. The decomposition product, phosphotungstic acid presents surface segregation as shown by comparison of XPS and nuclear magnetic resonance results.
Subject: Acetato de cellulose
Nanocompósitos (Materiais)
Espectroscopia fotoeletrônica de raio X
Country: Reino Unido
Editor: John Wiley & Sons
Citation: Surface And Interface Analysis. , v. 34, n. 1, p. 580 - 582, 2002.
Rights: aberto
Identifier DOI: 10.1002/sia.1364
Address: https://onlinelibrary.wiley.com/doi/10.1002/sia.1364
Date Issue: 2002
Appears in Collections:IFGW - Artigos e Outros Documentos

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