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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evolution of thermal properties of natural rubber nanocomposites functionalized by nickel-zinc ferrite and potassium strontium niobate nanopowders

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Author(s):
Bellucci, Felipe Silva ; Lobatode Almeida, Fabricio Cesar ; da Silva Agostini, Deuber Lincon ; Lima Nobre, Marcos Augusto ; Paschoalini, Amarildo Tabone ; Job, Aldo Eloizo
Total Authors: 6
Document type: Journal article
Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 126, n. 3, p. 1397-1406, DEC 2016.
Web of Science Citations: 3
Abstract

Several composites and nanocomposites based on a polymeric matrix and ceramic fillers are being pursued for use as multifunctional and innovative materials. Nevertheless, there is a series of challenges to be solved in this area such as the understanding of the role of interfaces and the synergy between matrix and fillers. In this work, vulcanized natural rubber nanocomposites were prepared with different concentrations of two kinds of ceramic nanoparticles, potassium strontium niobate (KSr2Nb5O15 or KSN) and nickel-zinc ferrite (Ni0.5Zn0.5Fe2O4 or NZF), synthesized by a chemical method known as the modified polyol method. Morphological and thermal characterizations were carried out by AFM, TG/DTG, TG/FTIR and DSC. The thermal properties of nanocomposites were compared and discussed as functions of concentration, type and surface of nanoparticles. The results obtained suggest that the base concentration for both types of nanoparticles inside the polymer matrix volume greatly adds to the increase in thermal stability up to 11 % and the glass transition temperature up to 10 degrees C. A similar evolution for the glass transition temperature (T-g), thermal stability temperature (T-S) and dielectric permittivity (epsilon') was identified, suggesting that these phenomena are mainly dominated by the same mechanisms. These results point to the possibility for the thermal parameter modulation in magnetic and ferroelectric nanocomposites by means of a suitable control of concentration and properties of the KSN and NZF nanoparticles. (AU)

FAPESP's process: 09/00523-8 - Preparation and characterization of mult-functional nanocomposites obtained with ferroelectrics and paramagnetics nanoparticles in natural rubber films
Grantee:Felipe Silva Bellucci
Support Opportunities: Scholarships in Brazil - Doctorate