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Comportamiento de envejecimiento de los paneles de aislamiento al vacío a base de fibras poliméricas
Jianzhu Ju1, Changxi Li1, Qunjian Huang1
1Hefei Hualing Co., Ltd, Midea Group Hefei 340100 China jianzhu.ju@outlook.com licx198@midea.com.
RSC advances
|August 27, 2025
Resumen
Este estudio introduce nuevos paneles de aislamiento al vacío (VIP) que utilizan fibras de polímero ultrafinas. Estos VIP ofrecen un excelente aislamiento inicial y resistencia al envejecimiento a largo plazo, lo que los convierte en un material de núcleo alternativo prometedor.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería térmica
- Nanotecnología
Sus antecedentes:
- Los paneles de aislamiento al vacío (VIP) son cruciales para la eficiencia energética de los aparatos y edificios.
- Lograr el rendimiento de aislamiento tanto inicial como a largo plazo en los VIP es un desafío debido a las dependencias contradictorias de la porosidad del material central.
- La resistencia al envejecimiento es fundamental para la fiabilidad de los VIP.
Objetivo del estudio:
- Para desarrollar un nuevo VIP utilizando fibras poliméricas ultrafinas como material central.
- Para investigar la conductividad térmica inicial y el comportamiento de envejecimiento del nuevo VIP.
- Evaluar el potencial de las fibras de polímero como alternativa sostenible.
Principales métodos:
- Fabricación de VIP con fibras poliméricas ultrafinas (7 μm de diámetro).
- Medición de la conductividad térmica y la presión in situ.
- Análisis de las características de envejecimiento a corto y largo plazo.
Principales resultados:
- Se ha logrado una baja conductividad térmica inicial de 1,6 mW mK-1 a un 85% de porosidad.
- Envejecimiento observado en dos fases: a corto plazo (viscoelástico, parcialmente reversible) y a largo plazo (permeación de gases).
- Demostró una baja tasa de envejecimiento a largo plazo de ~ 0,1 mW por mK por año.
Conclusiones:
- Los VIP a base de fibra de polímero ofrecen una combinación superior de baja conductividad inicial y fuerte resistencia al envejecimiento.
- Los VIP desarrollados presentan una alternativa más limpia a los materiales de núcleo convencionales.
- Se requieren más investigaciones sobre las fibras de polímero.
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