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Materiales conductores eléctricos compuestos de poliestireno reciclado y alótropos amorfos de carbono
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Researchers fabricated electrically conductive composites by blending recycled polystyrene with amorphous carbon allotropes (activated carbon, recycled carbon, and petroleum coke) at concentrations of 0.5–3% by weight, finding that carbon additions progressively improve the electrical conductivity of recycled plastic matrices.
La presente investigación tuvo como finalidad diseñar materiales compuestos utilizando poliestireno reciclado (PSR) e incorporando carbón activado (CA), carbón reciclado (CR) y coque de carbón (CQ) en concentraciones de 0,5 a 3% en peso. Para la obtención de los materiales compuestos utilizamos el método de mezclado en solución asistido por energía de ultrasonido. De acuerdo a los resultados de espectroscopia infrarroja por transformada de Fourier (FTIR), los alótropos amorfos no alteran la estructura del PSR, además el análisis termogravimétrico demostró que estos le brindan mayor estabilidad térmica. En cuanto al ángulo de contacto, se observó una tendencia hacia la hidroficilidad al incorporar los alótropos: se obtuvieron valores menores de 82° respecto al PSR con 126,2°. El material compuesto con mejor conductividad fue el PS/CA al 3% con un valor de 6,85 × 10-4, lo que indica una buena transferencia de carga del CA a la matriz polimérica. Los materiales compuestos obtenidos a partir de PSR le brindan propiedades mejoradas a este material, como la conductividad eléctrica, por lo tanto, el material puede ser utilizado para dispositivos de almacenamientos, conectores eléctricos, entre otros usos que le dan una nueva vida útil al material y disminuyen su impacto contaminante.
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