Article | REF: N4203 V1

New multifunctional porous materials derived from wood

Authors: Alain CELZARD, Vanessa FIERRO, Antonio PIZZI

Publication date: November 10, 2012, Review date: March 28, 2024

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3. Solid foams

By definition, a foam is a dispersion of gas in a liquid. When the liquid congeals and the gas bubbles cannot escape, the result is a solid foam.

Solid polymeric foams can be prepared in two ways: by physical foaming (requiring a blowing agent) or by chemical foaming (gas released during polymerization reactions, usually starting with water and/or carbon dioxide). Polyurethane foams can thus be prepared by either method, depending on the desired final characteristics [AM 3 714] . These foams have many qualities, making them an...

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Solid foams