The Relation between the Rheological Properties of Gels and the Mechanical Properties of Their Corresponding Aerogels

A series of low density, highly porous clay/poly(vinyl alcohol) composite aerogels, incorporating ammonium alginate, were fabricated via a convenient and eco-friendly freeze drying method. It is significant to understand rheological properties of precursor gels because they directly affect the form...

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Bibliographic Details
Published in:Gels 2018-04, Vol.4 (2), p.33
Main Authors: Sun, Mingze, Sun, Hua, Wang, Yutao, Sánchez-Soto, Miguel, Schiraldi, David A
Format: Article
Language:English
Subjects:
Aerogel
Aerogels
Alcohol
Alginates
Clay
Colloiding
Enginyeria dels materials
Gels
Hydrogels
Materials
Materials compostos
Mechanical properties
Morphology
Polymers
Porous materials
Propietats mecàniques
Reologia
Rheological properties
Rheology
Viscosity
Àrees temàtiques de la UPC
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Summary:A series of low density, highly porous clay/poly(vinyl alcohol) composite aerogels, incorporating ammonium alginate, were fabricated via a convenient and eco-friendly freeze drying method. It is significant to understand rheological properties of precursor gels because they directly affect the form of aerogels and their processing behaviors. The introduction of ammonium alginate impacted the rheological properties of colloidal gels and improved the mechanical performance of the subject aerogels. The specific compositions and processing conditions applied to those colloidal gel systems brought about different aerogel morphologies, which in turn translated into the observed mechanical properties. The bridge between gel rheologies and aerogel structures are established in the present work.
ISSN:2310-2861
2310-2861
DOI:10.3390/gels4020033