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Lignina modificada con tricetonas y las resinas diquetoenaminas basadas en biomasa correspondientes: síntesis y
Nien-Hsun Wu1, Yi-Ming Sun2, Ying-Ling Liu1
1Department of Chemical Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 300044, Taiwan.
ACS omega
|February 9, 2026
Resumen
Las resinas termoendurecibles reciclables y respetuosas con el medio ambiente se crearon utilizando lignina. La adición de un modificador de lignina-triketone (OL-TK) mejoró las propiedades mecánicas y el rendimiento a altas temperaturas de las resinas a base de ácido dicarboxílico furánico (FDCA) sin obstaculizar la reciclabilidad.
Área de la Ciencia:
- Química de Polímeros La Química de Polímeros es la química de los polímeros.
- Ciencia de los materiales Ciencia de los materiales.
- Química Sostenible y Sustentable.
Sus antecedentes:
- El desarrollo de materiales poliméricos sostenibles a partir de biomasa es crucial.
- Las resinas termoendurecibles reciclables ofrecen una alternativa a los plásticos tradicionales no reciclables.
- La lignina, un componente de la biomasa fácilmente disponible, presenta un potencial como materia prima para materiales avanzados.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevas resinas de diketoenamina basadas en lignina.
- Investigar el potencial de la lignina-triketone (OL-TK) como modificador reactivo para las resinas de diketoenamina basadas en ácido dicarboxílico furánico (FDCA).
- Evaluar el impacto de OL-TK en las propiedades mecánicas, el comportamiento térmico y la reciclabilidad de las resinas modificadas.
Principales métodos:
- Síntesis de la lignina-triketone (OL-TK) a partir de la lignina soluble en agua.
- Enlace cruzado de OL-TK con tris-(2-aminoetil) -amina (TREN) para formar resinas a base de lignina.
- Modificación de las resinas de diketoenamina basadas en FDCA con un porcentaje de peso variable de OL-TK.
- Caracterización de las propiedades mecánicas, temperatura de transición de vidrio (Tg), relajación de la tensión y reciclabilidad.
Principales resultados:
- La resina de diketoenamina a base de lignina exhibió un alto Tg (165 °C) pero mostró fragilidad.
- Las resinas a base de FDCA que contienen lignina mostraron características de vitrímeros, incluida la relajación del estrés y la reciclabilidad.
- La adición de 3 wt % de OL-TK mejoró las propiedades mecánicas y suprimió el creep a alta temperatura sin afectar las propiedades térmicas o la reciclabilidad.
- Un mayor contenido de OL-TK (7 wt %) mejoró las propiedades mecánicas, pero condujo a la agregación de lignina y afectó negativamente el rendimiento del reciclaje.
Conclusiones:
- La lignina se puede utilizar eficazmente para crear resinas termofijadas reciclables con propiedades ajustables.
- OL-TK sirve como un modificador reactivo beneficioso para las resinas de diketoenamina basadas en FDCA, mejorando el rendimiento y manteniendo la reciclabilidad en concentraciones óptimas.
- Un control cuidadoso del contenido de OL-TK es esencial para equilibrar las propiedades mejoradas del material con un reciclaje efectivo.
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