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Una capa de adhesión a nanoescala para promover la fijación celular en el PEEK
T Joseph Dennes1, Jeffrey Schwartz
1Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
Journal of the American Chemical Society
|March 12, 2009
Resumen
Los investigadores desarrollaron una nueva capa de adhesión para las superficies de polietileno tereftalato (PET) y polietileno-éter-éter-cetona (PEEK). Este método se une covalentemente a las moléculas adherentes a las células, mejorando significativamente el crecimiento celular en estos materiales.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Biotecnología La biotecnología es la biotecnología.
- Química de las superficies.
Sus antecedentes:
- El poli (tereftalato de etileno) (PET) y el poli (tereftalato de etileno) (PEEK) son polímeros ampliamente utilizados.
- Mejorar la adhesión celular y el crecimiento en superficies de polímeros es crucial para aplicaciones biomédicas.
- Los métodos existentes para la modificación de la superficie pueden estar limitados en su capacidad para formar fijaciones covalentes estables.
Objetivo del estudio:
- Desarrollar una nueva capa de adhesión para la unión covalente de moléculas adherentes a las células.
- Para funcionalizar las superficies de poli (tereftalato de etileno) (PET) y poli (arilo-éter-éter-cetona) (PEEK).
- Para mejorar el crecimiento celular en superficies de polímeros modificados.
Principales métodos:
- Deposición de vapor de zirconio o tetra ((tert-butóxidos) de titanio sobre las superficies de PET y PEEK a temperatura ambiente y baja presión.
- Termolisis controlada de la capa de alcóxido depositado para formar una capa de óxido-alcóxido mezclado.
- Reacción de la superficie modificada con ácidos fosfónicos para crear películas monocapa de fosfonatos.
Principales resultados:
- Se creó con éxito una capa de adhesión estable en las superficies de PET y PEEK.
- El grosor de la capa de adhesión era controlable y monitoreado.
- La fijación de películas de monocapa de fosfonato mejoró significativamente el crecimiento celular en comparación con las superficies no tratadas.
Conclusiones:
- Se ha establecido un método nuevo y controlable para la funcionalización covalente de las superficies de PET y PEEK.
- La capa de adhesión desarrollada promueve un mayor crecimiento celular, lo que indica un potencial para mejores aplicaciones de biomateriales.
- Esta técnica ofrece un enfoque prometedor para adaptar las propiedades de la superficie del polímero a las interacciones biológicas.
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