A gel is a jelly-like colloidal system in which a liquid is dispersed in a solid medium. Gels may be classified into two types : (a) Elastic Gels are jelly-like colloidal systems in which a liquid is dispersed in a solid medium. Boot polish, cheese, jelly, curd, silica, etc. are some common examples of gel. Gels may be categorized into two types : An upturned vial of hair gel Silica gel A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. [1][2] 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. [3] IUPAC definition for a gel Gels are mostly liquid by mass, yet they behave like solids because of a three-dimensional cross-linked network within the liquid. It is the cross ... gel, coherent mass consisting of a liquid in which particles too small to be seen in an ordinary optical microscope are either dispersed or arranged in a fine network throughout the mass. A gel may be notably elastic and jellylike (as gelatin or fruit jelly), or quite solid and rigid (as silica gel, a material that looks like coarse white sand and is used as a dehumidifier). Gels are colloids (aggregates of fine particles, as described above, dispersed in a continuous medium) in which the ...
