16 February, 2012

sth that suddenly came up to me ...
is gel a solid or a liquid ?
A gel is neither a liquid or a solid, but a mixture contains both liquid and solid mixed together. - http://www.madsci.org/posts/archives/2001-03/984500675.Ch.r.html
Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady-state. By weight, gels are mostly liquid, yet they behave like solids due to a three-dimensional cross-linked network within the liquid. It is the crosslinks within the fluid that give a gel its structure (hardness) and contribute to stickiness (tack). In this way gels are a dispersion of molecules of a liquid within a solid in which the solid is the continuous phase and the liquid is the discontinuous phase. - http://en.wikipedia.org/wiki/Gel
so yeah i hope i learned sth new ! :D

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