KELCOGEL® Gellan Gum
KELCOGEL® gellan gum is a polysaccharide manufactured by microbial fermentation. Gellan gum is extremely effective at low use levels and forms solid gels at concentrations as low as 0.1%. This multi-functional gelling agent can be used alone or in combination with other products to produce a wide variety of interesting textures.
KELCOGEL gellan gums are available in two types. Low acyl KELCOGEL products form hard, non-elastic, brittle gels. High acyl KELCOGEL products form soft, very elastic, non-brittle gels. Varying the ratios of the two forms of gellan gum produces a wide variety of textures.
KELCOGEL gellan gum can also be used as a unique suspending agent. Gels occur when hot gellan gum solutions are allowed to cool and set under quiescent conditions. However, with low concentrations of gellan gum, shearing the gel results in the formation of pourable fluid masses with very short, flowable texture.
The uniqueness of gellan gum is the ability to suspend while contributing minimal viscosity via the formation of a uniquely functioning “fluid gel” solution with a weak gel structure. These gels exhibit an apparent yield stress, i.e., a finite stress which must be exceeded before the system will flow. These systems are very good at suspending particulate matter since, provided the stress exerted by the action of gravity on the particles is less than the yield stress, the suspension will remain stable.
Gellan gum fluid gels have a high low-shear viscosity, providing remarkable suspending properties at low gum concentrations. With highly pseudoplastic, or shear thinning, flow properties, application of an external shear reduces the apparent viscosity significantly.
Other important properties of gellan gum fluid gels are the setting temperature, degree of structure and thermal stability. All of these properties are, as with normal unsheared gels, dependent upon the concentration of gellan gum and the type and concentration of gelling ions.
This multi-functional hydrocolloid can be used at low levels in a wide variety of products that require gelling, texturizing, stabilizing, suspending, film-forming and structuring.