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Hidrogeles resistentes a la fatiga diseñados con estructuras jerárquicas retorcidas.

Yinghui Feng^1,2, Yafei Wang¹, Chang Wang¹

¹Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, China.

Advanced materials (Deerfield Beach, Fla.)

|February 21, 2026

Resumen

Los investigadores desarrollaron un método de torsión bioinspirado para mejorar significativamente la durabilidad del hidrogel para robótica blanda y usos biomédicos. Esta estrategia mejora la resistencia mecánica y la resistencia a la fatiga, superando las limitaciones clave para aplicaciones dinámicas.

Palabras clave:

bioinspirado bioinspirado bioinspirado bioinspirado resistencia a la fatiga y resistencia a la fatiga.La estructura jerárquica es una estructura jerárquica.Los hidrogeles también son hidrogeles.Torcerse y retorcerse.

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Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Robótica y Robótica Robótica y Robótica Robótica Robótica Robótica Robótica Robótica Robótica
Ingeniería Biomédica Ingeniería Biomédica.

Sus antecedentes:

Los hidrogeles ofrecen biocompatibilidad y suavidad para la robótica blanda y aplicaciones biomédicas.
La baja resistencia a la fatiga limita la utilidad del hidrogel en escenarios de carga dinámica a largo plazo.

Objetivo del estudio:

Para mejorar la durabilidad mecánica y la resistencia a la fatiga de los materiales de hidrogel.
Desarrollar una estrategia de torsión bioinspirada para mejorar el rendimiento del hidrogel.

Principales métodos:

Se aplicó una metodología de torsión bioinspirada a las fibras de hidrogel.
Se utilizaron simulaciones multiscala para analizar la distribución de las tensiones bajo torsión.
Las demostraciones de prueba de concepto incluyeron un actuador inspirado en la lengua de la rana.

Principales resultados:

La estrategia de torsión mejoró significativamente la resistencia a la tracción, la extensibilidad y los umbrales de fatiga.
La torsión moderada promovió una distribución uniforme de las tensiones, mientras que la torsión excesiva condujo a un bloqueo geométrico.
Las fibras de hidrogel mantuvieron la integridad estructural durante ciclos prolongados.

Conclusiones:

El enfoque de torsión bioinspirado proporciona un paradigma de diseño universal para los sistemas de hidrogel resistentes a la fatiga.
Este método mejora el rendimiento del hidrogel para aplicaciones exigentes en dispositivos médicos implantables y robótica blanda.
La estrategia es compatible con varios sistemas de hidrogel, incluidos PVA, alginato y compuestos de celulosa.