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Transición por luz verde de los derivados de azobenzeno hacia adhesivos reversibles
Zhen Wu1, Chendong Ji1, Xujie Zhao1
1State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , People's Republic of China.
Journal of the American Chemical Society
|April 17, 2019
Resumen
Este estudio introduce un nuevo método fototérmico para adhesivos derivados del azobenzeno reversibles. Estos materiales pasan de sólidos a líquidos bajo luz verde y se solidifican rápidamente, ofreciendo una adhesión fuerte y reutilizable.
Área de la Ciencia:
- Ciencias de los materiales
- Química orgánica
- La fotoquímica
Sus antecedentes:
- Los derivados de azobenzeno suelen utilizar la fotoisomerización para las transiciones de fase, que tienen tiempos de reversión espontánea lentos.
- El desarrollo de transiciones de fase inducidas por la luz de rápida reversión es crucial para aplicaciones de materiales avanzados.
Objetivo del estudio:
- Demostrar una nueva transición de fase sólida a líquida impulsada por la fototermia y una rápida reversión en los derivados de azobenzeno.
- Desarrollar un concepto para crear adhesivos reversibles basados en transiciones de fase inducidas por la luz.
Principales métodos:
- Utilizando azobenzenos adecuadamente sustituidos que se agregan para permitir efectos fototérmicos.
- Inducir transiciones de sólido a líquido a través de la irradiación de luz verde.
- Observación de la solidificación espontánea debido a la liberación de calor.
Principales resultados:
- Se han logrado transiciones de sólido a líquido inducidas por la luz en los derivados de azobenceno.
- Se ha demostrado una solidificación rápida y espontánea en 2 minutos.
- Se obtiene una adhesión perfectamente reversible con una resistencia comparable a la de los materiales comerciales.
Conclusiones:
- Los efectos fototérmicos ofrecen una nueva vía para las transiciones de fase inducidas por la luz en los derivados de azobenzeno.
- Este método permite la creación de adhesivos altamente eficaces y rápidamente reversibles.
- Los hallazgos presentan un nuevo concepto para el diseño de adhesivos reversibles utilizando compuestos orgánicos.
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