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Películas de poliuretano/MXeno a base de poliláctido diseñadas por emulsión para sensores portátiles flexibles y
Oceu Dwi Putri1,2, Atitsa Petchsuk3, Shu Han Hsu1
1School of Integrated Science and Innovation, Sirindhorn International Institute of Technology (SIIT), Thammasat University, Pathum Thani 12120, Thailand.
iScience
|February 3, 2026
Resumen
Este estudio desarrolló películas flexibles y conductoras a partir de poliláctido reciclado (PLA) y MXeno para electrónica portátil. Estos materiales sostenibles muestran potencial para dispositivos avanzados de monitorización de la salud.
Área de la Ciencia:
- Ciencia de materiales
- Química de polímeros
- Nanotecnología
Sus antecedentes:
- El diseño de polímeros blandos resistentes y conductores para wearables es un desafío.
- La baja carga de relleno y la robustez mecánica son requisitos clave.
- El abastecimiento de materiales sostenibles es cada vez más importante.
Objetivo del estudio:
- Crear películas flexibles y conductoras utilizando poliuretano (PU) y MXeno a base de poliláctido (PLA) sostenibles.
- Lograr una baja carga de relleno y propiedades mecánicas mejoradas.
- Explorar el upcycling de PLA para materiales electrónicos de alto rendimiento.
Principales métodos:
- Despolimerización de PLA en precursores de poliol mediante alcohol-acidólisis asistida por microondas.
- Síntesis de PU a base de PLA.
- Procesamiento asistido por emulsión de PLA-PU y MXeno delaminado (Ti3C2Tx) con alcohol polivinílico (PVA) como compatibilizador.
Principales resultados:
- Las películas híbridas exhibieron una dispersión superior de MXeno y umbrales de percolación significativamente más bajos (≤10 % en peso) en comparación con las películas coladas en solución (≥40 % en peso).
- Se logró una resistencia a la tracción y flexibilidad óptimas con composiciones de 6:4 y 7:3 de PLA-PU/MXeno/PVA.
- Las películas demostraron respuestas sensibles y reproducibles tanto a macro- (flexión de dedos) como a micro-deformaciones (vibraciones vocales/laríngeas).
Conclusiones:
- Este trabajo recicla con éxito PLA en películas conductoras flexibles de alto rendimiento.
- Los materiales desarrollados ofrecen una vía prometedora para la próxima generación de monitorización de la salud y sistemas biointegrados.
- El uso de precursores biocompatibles mejora la idoneidad para aplicaciones portátiles.
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