Gel Doc
A gel is a Quasi-solid, semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady state, although the liquid phase may still diffuse through this system. Gels are mostly liquid Mass fraction (chemistry), by mass, yet they behave like solids because of a three-dimensional cross-linked network within the liquid. It is the cross-linking within the fluid that gives a gel its structure (hardness) and contributes to the adhesive stick (Adhesive, tack). In this way, gels are a dispersion of molecules of a liquid within a solid medium. The word ''gel'' was coined by 19th-century Scottish chemist Thomas Graham (chemist), Thomas Graham by clipping (morphology), clipping from ''gelatine''. The process of forming a gel is called gelation. Composition Gels consist of a solid three-dimensional network that spans the volume of a liquid medium and ensnares it t ...
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