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Creación de cápsulas de líquido sintonizables de baja tensión superficial a través de encapsulación de

Tian-Yu Zhang1, Arnav Banerjee1, Sushanta K Mitra1

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Resumen

Este estudio avanza en el encapsulamiento líquido-líquido impulsado por impacto (LLE) para gotas de baja tensión superficial. Los investigadores lograron una encapsulación confiable de gotas con una tensión superficial tan baja como 16 mN/m, identificando parámetros clave para el control.

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Área de la Ciencia:

  • Ciencia e Ingeniería de Materiales Ciencia e Ingeniería de Materiales.
  • Ingeniería Química Ingeniería Química.
  • La dinámica de fluidos es la dinámica de fluidos.

Sus antecedentes:

  • La encapsulación de gotas de baja tensión superficial es crucial para los productos farmacéuticos, la ingeniería ambiental y la gestión térmica.
  • La encapsulación líquido-líquido impulsada por impacto (LLE) es una técnica prometedora pero poco explorada para la encapsulación de gotas.
  • La encapsulación controlada de gotas de baja tensión superficial utilizando LLE impulsado por impacto no se ha investigado fundamentalmente.

Objetivo del estudio:

  • Avanzar en la técnica de LLE impulsada por impactos ultrarrápidos para el encapsulado controlado de gotas de baja tensión superficial.
  • Investigar experimentalmente los mecanismos y parámetros fundamentales que rigen este proceso de encapsulación.

Principales métodos:

  • Demostración experimental de la encapsulación líquido-líquido impulsada por impacto ultrarrápido (LLE).
  • Se utilizaron gotas FC-40 (tensión superficial tan baja como 16 mN/m) con diferentes diámetros de impacto (1.791.26 mm).
  • Empleó una capa interfacial (capa) de aceite de silicona ultradelgada y analizó los regímenes de encapsulación.

Principales resultados:

  • Encapsularon con éxito gotas de baja tensión superficial FC-40 en cuestión de milisegundos.
  • Se identificaron tres regímenes de encapsulación: atrapamiento interfacial, penetración con burbujas de aire y penetración sin burbujas de aire.
  • Control preciso demostrado sobre la morfología de la cápsula y la distribución del tamaño mediante el ajuste de la energía cinética de impacto y el grosor de la capa interfacial.

Conclusiones:

  • El estudio proporciona una comprensión fundamental de LLE impulsado por el impacto para gotas de baja tensión superficial.
  • Las capas interfaciales más gruesas promueven cápsulas libres de burbujas de aire.
  • Ofrece información valiosa para la producción eficiente y rentable de cápsulas funcionales en diversas aplicaciones.