1. Reminders on gel formation

1.1 Definition of a gel and criteria for obtaining an aerogel

A gel is a thermodynamically stable solid-liquid two-phase system consisting of a continuous three-dimensional interpenetrating double network, one solid and one liquid. Flory has proposed a classification of gels that applies equally to organic and inorganic gels:

lamellar gels such as mesophase and clay gels;
polymer-type covalently bonded gels ;
gels formed by the physical aggregation (crystallization) of polymeric...

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Reminders on gel formation

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page Aerogels. Fundamentals

The different gel families

Bibliography

(1) - FLORY (P.J.) - Gels and gelling processes. - Disc. Faraday Soc., 57, p. 7-18 (1974).
(2) - KISTLER (S.S.) - Coherent expanded aerogels and jellies. - Nature, 127, p. 741 (1931).
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