Epoxy hybrid composites reinforced with nanodiamond-silica for abrasive applications

Abstract In this work, a ternary composite of epoxy filled with ND and MS was produced for abrasive applications. Surfactants (oleic acid (OA), sodium dodecyl sulfate (SDS) and Triton TX-100 (TX-100)) were used to improve the particle dispersion and, consequently, the composite properties. The elast...

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Veröffentlicht in:Polímeros, ciência e tecnologia ciência e tecnologia, 2021-01, Vol.31 (3)
Hauptverfasser: Barcelos, Marcos Antônio, Barcelos, Mariana Valinhos, Almeida Neto, Gabriel Rodrigues de, Bozzi, Antônio Cesar, Rodriguez, Rubén Jesus Sánchez
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Sprache:eng
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Zusammenfassung:Abstract In this work, a ternary composite of epoxy filled with ND and MS was produced for abrasive applications. Surfactants (oleic acid (OA), sodium dodecyl sulfate (SDS) and Triton TX-100 (TX-100)) were used to improve the particle dispersion and, consequently, the composite properties. The elastic modulus increased up to 76% for the sample with 1 wt% ND and 5 wt% ND using TX-100 (1ND5MS-TX100). Regardless of the filler concentration, the particles did not modify the thermal degradation behavior of the epoxy. Thermogravimetric (TGA) and dynamic mechanical (DMA) analyses suggest a strong particle-matrix interface, also evidenced in scanning electron microscope (SEM) micrographs. The composites presented superior tribological performance. 1ND5MS-TX100 presented a wear rate of 2.19 x 10-3 mm3.Nm-1, 61.3% lower than the epoxy. Also, all composites significantly reduced the roughness of the marble, being proportional to the abrasives concentration. Overall, composites with TX-100 presented improved wear behavior.
ISSN:0104-1428
1678-5169
1678-5169
DOI:10.1590/0104-1428.20210036