Influencia del hidróxido de potasio - aminopropiltrimetoxysilano, sobre resistencia a la tracción e impacto del compuesto poliéster-agave
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Date
2024-04
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Universidad Nacional de Trujillo
Abstract
El objetivo principal de la presente investigación fue explorar el impacto de los tratamientos
químicos superficiales de fibras vegetales de agave en las propiedades mecánicas de compuestos
de matriz de resina poliéster, como resistencia a la tracción y resistencia al impacto. Se emplearon
técnicas de caracterización física, como microscopía óptica, para evaluar las secciones
transversales de las fibras antes y después de los tratamientos con hidróxido de potasio (KOH) y
una combinación de KOH y aminopropiltrimetoxisilano (KOH-Silano). Como también
caracterización mecánica de los compuestos poliester-agave por ensayos de esfuerzo a la tracción
ASTM D3039 Y de esfuerzo al impacto ISO 179-1. El diseño experimental, de enfoque explicativo
y cuantitativo, teniendo concentraciones diferentes para tratamiento con KOH (1M, 2.5M, y 5M).
Como también las mismas concentraciones de KOH con una concentración fija de
aminopropiltrimetoxisilano (2M) para el tratamiento consecutivo KOH-Silano. Como resultados,
en términos de resistencia a la tracción, se observó una mayor adhesión entre la fibra de agave y
la matriz poliéster por parte de KOH. Sin embargo, la adición de Silano como agente de acople
demostró una unión significativa, potenciando aún más la resistencia a la tracción de los
compuestos. Este patrón también se reflejó en los resultados de resistencia al impacto Charpy,
donde la adición de Silano como agente de acople al tratamiento solo por KOH generó un impacto
positivo adicional, destacando su papel importante en la mejora de la tenacidad de los compuestos.
En conclusión, la investigación subraya la eficacia de los tratamientos químicos superficiales,
especialmente la combinación de KOH y Silano, en mejorar las propiedades mecánicas de
compuestos poliéster-agave.
The main aim of the present research was to explore the impact of chemical surface treatments of agave plant fibers on the mechanical properties of polyester resin matrix composites, such as tensile strength and impact resistance. Physical characterization techniques, such as optical microscopy, were used to evaluate fiber cross sections before and after treatments with potassium hydroxide (KOH) and a combination of KOH and aminopropyltrimethoxysilane (KOH-Silane). As well as mechanical characterization of the agave polyester composites by ASTM D3039 tensile stress tests and ISO 179-1 impact stress tests. The experimental design, with an explanatory and quantitative approach, had different concentrations for KOH treatment (1M, 2.5M, and 5M). As well as the same concentrations of KOH with a fixed concentration of aminopropyltrimethoxysilane (2M) for the consecutive KOH-Silane treatment. As results, in terms of tensile strength, greater adhesion was observed between the agave fiber and the polyester matrix by KOH. However, the addition of Silane as a coupling agent demonstrated significant bonding, further enhancing the tensile strength of the composites. This pattern was also reflected in the Charpy impact resistance results, where the addition of Silane as a coupling agent to the KOHonly treatment generated an additional positive impact, highlighting its important role in improving the toughness of the composites. In conclusion, the research highlights the effectiveness of chemical surface treatments, especially the combination of KOH and Silane, in improving the mechanical properties of polyester-agave composites.
The main aim of the present research was to explore the impact of chemical surface treatments of agave plant fibers on the mechanical properties of polyester resin matrix composites, such as tensile strength and impact resistance. Physical characterization techniques, such as optical microscopy, were used to evaluate fiber cross sections before and after treatments with potassium hydroxide (KOH) and a combination of KOH and aminopropyltrimethoxysilane (KOH-Silane). As well as mechanical characterization of the agave polyester composites by ASTM D3039 tensile stress tests and ISO 179-1 impact stress tests. The experimental design, with an explanatory and quantitative approach, had different concentrations for KOH treatment (1M, 2.5M, and 5M). As well as the same concentrations of KOH with a fixed concentration of aminopropyltrimethoxysilane (2M) for the consecutive KOH-Silane treatment. As results, in terms of tensile strength, greater adhesion was observed between the agave fiber and the polyester matrix by KOH. However, the addition of Silane as a coupling agent demonstrated significant bonding, further enhancing the tensile strength of the composites. This pattern was also reflected in the Charpy impact resistance results, where the addition of Silane as a coupling agent to the KOHonly treatment generated an additional positive impact, highlighting its important role in improving the toughness of the composites. In conclusion, the research highlights the effectiveness of chemical surface treatments, especially the combination of KOH and Silane, in improving the mechanical properties of polyester-agave composites.
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TECHNOLOGY::Materials science