welan gum introduction

Welan gum is a thickening agent whose properties make it well suited to use in high temperature industrial applications and oilfield drilling muds.
Source: Biofermentation using a sugar source
Function: Thickening, suspension, thermal stability
Description: Welan gum is a specialty fermentation polysaccharide produced by fermentation of Sphingomonas sp.A key feature of this novel, water-soluble polysaccharide is its excellent stability and viscosity retention at temperatures up to 150°C (300°F).
In addition, this hydrophilic colloid thickens, suspends, and stabilizes water-based systems while imparting rheological control. The excellent functionality of welan gum in high-temperature conditions makes it suitable for industrial applications such as sealants, metalworking compounds and various industrial applications. Welan gum is stable in the presence of calcium ions, even under high pH conditions, and in solutions containing high levels of glycols.
A solution of welan gum in water is highly pseudoplastic (shear thinning). At rest and under low shear conditions it exhibits a very high viscosity. By contrast, under high shear conditions it exhibits a low viscosity. The viscosity changes immediately when the shearing conditions change, for example, when the solution comes to rest after being pumped.

welan gum introduction

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