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Updated: May 13, 2026

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Published on: February 28, 2014

Una vía de gelatación termorreversible a los monolitos de aerogel mesoporoso basados en cristales estereocomplejos de

Saadman Sakib Rahman¹, Anthony V Tuccitto¹, Zeineb Ben Rejeb¹

¹Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, M5S 3G8, Canada.

Small (Weinheim an der Bergstrasse, Germany)

|September 1, 2025

Resumen

Se crearon nuevos aerogeles de poli (methacrilato de metilo) (PMMA) mediante gelación termoreversible y secado supercrítico con CO2. Estos materiales ligeros y reciclables ofrecen un excelente aislamiento térmico y capacidad de separación de aceite y agua, demostrando un equilibrio único de propiedades mecánicas.

Área de la Ciencia:

Ciencias de los materiales
Química de los polímeros
Nanotecnología

Sus antecedentes:

Los materiales termoplásticos ligeros y funcionales tienen una gran demanda.
El poli (methacrilato de metilo) (PMMA) es un termoplástico común, pero sus aerogeles a menudo son frágiles.
El desarrollo de materiales basados en PMMA con propiedades mejoradas y capacidad de reciclaje es crucial.

Objetivo del estudio:

Fabricar nuevos aerogeles monolíticos a partir de polimethacrilato de metilo (PMMA) y sus cristales estereocomplejos.
Investigar las relaciones estructura-propiedad de estos aerogeles de PMMA.
Explorar sus aplicaciones potenciales en la separación de aceite y agua y en el aislamiento térmico.

Principales métodos:

Gelación térmicamente reversible de una sola olla de las soluciones de PMMA
Secado supercrítico con CO2 (scCO2) de los geles resultantes.
Caracterización de la porosidad, la densidad, las propiedades térmicas, las propiedades mecánicas y la capacidad de absorción.

Principales resultados:

Aerógenos de PMMA fabricados con porosidad ajustable (66,6-97,3%) y bajas densidades (0,03-0,4 g cm-3).
Se alcanzan altas temperaturas de fusión y entalpías para los cristales estereocomplejos de PMMA debido al secado con scCO2.
Demostró un notable equilibrio de rigidez, resistencia y tenacidad, junto con superoleofilia y aislamiento térmico efectivo (k: 24-65 mW m-1 K-1).

Conclusiones:

Los aerogeles de PMMA fabricados mediante gelación termoreversible y secado con scCO2 exhiben propiedades excepcionales.
La estructura de ligamento nanométrico-cristalino contribuye a su mejor rendimiento mecánico.
Estos aerogeles reciclables muestran una promesa significativa para aplicaciones en separación de aceite y agua, aislamiento térmico y desarrollo de materiales sostenibles.

Palabras clave:

Micela con franjas Las láminas estructura reticulada Solgel también CO2 supercrítico el termogel

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