Aerocore Description Small Pore Area Material

Aerocore Description Small Pore Area Material 

There is disagreement within the aerogel community about the definitions of aerogel materials. Some definitions include porosity restrictions such as mesoporosity requirements (2-20 nm), others require supercritical drying techniques, and some include density restrictions. Even measuring these properties can lead to uncertainties and controversy. 

Acknowledging these difficulties, researchers at LLNL proposed a nomenclature for open cellular foam structures called Low-Density MicroceUular Materials (LDMMs) [4] 

We arrived at this definition after discovering that other techniques, such as calculating pore size distributions from the BJH method via nitrogen isotherms, do not account for a large portion of the total pore volumes within these types of materials. The amorphous structures seen in SEM images indicate a porosity that is difficult to describe mathematically, whereas the field of microscopy has given us tools that are readily available, which help us to quantify these structures. 

Aerocore has pore sizes, correlated with SAXS data, which can range from mesoporous to microporous and densities from roughly 0.050 to 1 g cm . The morphology is typically of the pearl necklace variety with larger beads and small necks. SEM images show it to be a fractal stmcture. It can be made in a mruiolith, powder, and thin film. 

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Aerocore Description Small Pore Area Material... 

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