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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Preparation and structural characterization of sodium polyphosphate coacervate as a precursor for optical materials

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Autor(es):
Franco, D. F. ; Barud, H. S. ; Santagneli, S. ; Lamarca, R. S. ; Santos, Bruno F. ; Silva, M. A. P. ; de Oliveira, L. F. C. ; Ribeiro, S. J. L. ; Nalin, M.
Número total de Autores: 9
Tipo de documento: Artigo Científico
Fonte: Materials Chemistry and Physics; v. 180, p. 114-121, SEP 1 2016.
Citações Web of Science: 2
Resumo

This paper describes the preparation of Sodium Polyphosphates Coacervates (NaPC) through the direct addition of different methanol molar fractions to a sodium polyphosphate solution. The presence of methanol reduces the dielectric constant medium and it promotes the coacervate formation. Rheology measurement shows that the NaPC viscosity is dependent on a methanol molar fraction, which is caused by the dielectric constant reduction of the water-methanol mixture. Raman spectra for the lyophilized NaPC show that the symmetric P-O-t stretching mode is more sensitive than the symmetric P-O-b stretching mode, due to the approach of the adjacent polyphosphate chains. The P-31 NMR spectra also confirm a decrease in the Q(2)/Q(1) ratio because of the methanol content. Besides, we have obtained transparent soft Glass-Materials to melt NaPC at 800 degrees C. (C) 2016 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs