Comparison of the nanoparticles performance in the photocatalytic degradation of a styrenebutadiene rubber nanocomposite

Autor(es)

Arantes, Tatiane M. ; Sala, Renata L. ; Leite, Edson R. ; Longo, Elson ; Camargo, Emerson R.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 128, n. 4, p. 7-pg., 2013-05-15.

Resumo

Much has been talking about the advantages of polymeric nanocomposites, but little is known about the influence of nanoparticles on the stability of these materials. In this sense, we studied the influence of both oxides of zirconium and titanium, known to have photocatalytic properties, as well as the influence of synthetic clay Laponite on the photodegradation of styrenebutadiene rubber (SBR). SBR nanocomposites were prepared by the colloidal route by mixing commercial polymer lattices and nanometric anatase TiO2, monoclinic ZrO2 or exfoliated Laponite clays colloidal suspensions. To better understand the degradation mechanisms that occur in these nanocomposites, the efficiency of different photocatalysts under ultraviolet radiation was monitored by FT-IR and UVvis spectroscopies and by differential scanning calorimetric. It was observed that TiO2 and ZrO2 nanoparticles undoubtedlyacted as catalysts during the photodegradation process with different efficiencies and rates. However, when compared to pure SBR samples, the polymer degradation mechanism was unaffected. Unlike studies with nanocomposites montmorillonite, exfoliated laponite clay effectively acts as a photostabilizer of polymer UV photodegradation. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 (AU)

• Processo FAPESP: 07/50904-2 - Perovskitas baseadas no titanato de chumbo modificadas com terras raras sintetizadas usando o método dos complexos oxidantes de peróxido (OPM - the oxidant-peroxide method) e caracterizadas com uso complementar de espectroscopia Raman, infravermelho e difração de raios X
• Beneficiário: Alexandre Henrique Pinto
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 07/58891-7 - Perovskitas baseadas no titanato de chumbo modificadas com terras raras sintetizadas usando o método dos complexos oxidantes de peróxido (OPM - the oxidant-peroxide method) e caracterizadas com uso complementar de espectroscopia Raman, difração de raios-X e microscopia eletrônica
• Beneficiário: Emerson Rodrigues de Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Regular