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Membranas de mezcla PVDF/PGMA: microestructura impulsada por NIPS, miscibilidad termodinámica y mejora de la

Md Azizul Hakim¹, Md Mahadi Hasan¹, Md Al-Mamun^2,3

¹Department of Chemistry, University of Rajshahi, Rajshahi 6205, Bangladesh.

|February 9, 2026

Resumen

Se crearon nuevas membranas de mezcla de poli- ((fluoruro de vinilideno) / poli- ((metacrilato de glicidil) utilizando NIPS. Este proceso mejoró el contenido electroactivo de la fase β y mejoró la porosidad de la membrana y la hidrofilicidad para aplicaciones avanzadas.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
La ciencia de los polímeros es la ciencia de los polímeros.
Tecnología de membranas Tecnología de membranas.

Sus antecedentes:

El fluoruro de polivinilideno (PVDF) es un polímero versátil con aplicaciones en varios campos.
El control de la fase cristalina y la microestructura del PVDF es crucial para optimizar su rendimiento.
La separación de fase inducida por no disolvente (NIPS) es un método común para la fabricación de membranas de polímero.

Objetivo del estudio:

Para fabricar nuevas membranas de mezcla de PVDF/poli-glicidil metacrilato (PGMA).
Para investigar la miscibilidad y el comportamiento de separación de fase de las mezclas PVDF/PGMA.
Explorar el efecto de la incorporación de PGMA en la fase cristalina del PVDF, la microestructura de la membrana y las propiedades de la superficie.

Principales métodos:

Proceso de separación de fase inducida por no solvente (NIPS, por sus siglas en inglés).
Predicción teórica utilizando la ecuación de Schneier.
Caracterización completa que incluye XRD, FTIR, DSC y FESEM.

Principales resultados:

Las mezclas PVDF/PGMA exhiben una miscibilidad parcial con un umbral de separación de fase crítica alrededor del 37% vol. de PGMA.
El proceso NIPS mejoró significativamente el contenido de fase β de PVDF, alcanzando hasta el 70%.
La incorporación de PGMA aumentó la porosidad de la membrana y la hidrofilicidad superficial.

Conclusiones:

El proceso NIPS promueve efectivamente la cristalización de PVDF en la fase electroactiva β.
La composición de la mezcla permite ajustar la microestructura y las propiedades de la membrana.
Estas membranas PVDF/PGMA son prometedoras para aplicaciones funcionales y biomédicas.

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