What is xanthan gum?

Xanthan gum is internationally Part One thickening, suspending , emulsifying, stabilizing at one. Performance of the most superior biological glue . Xanthan molecules containing side chain end how much pyruvate group , have a significant impact on its performance. Xanthan gum has the general properties of long-chain polymers , but it contains more than the average high molecular functional groups , will show unique properties under certain conditions . It conformation in aqueous solution are diverse , not the performance characteristics under different conditions .

1 suspension and emulsification

Xanthan gum on the insoluble solids and oil droplets suspended with good effect . Xanthan gum sol binding molecules can form a super helical ribbon copolymer constituting a mesh structure similar to the fragile plastic , it is possible to form the solid support particles , droplets and bubbles , the emulsion showed a strong stabilizing effect and a high suspension capacity.

(2) good water solubility

Xanthan gum can quickly dissolve in water , have a good water solubility. In particular it can be dissolved in cold water, eliminating the need for complicated process easy to use. However, because it has a strong hydrophilic , if added directly to the water is small and insufficient stirring , into the outer micelle swelling , prevents moisture from entering the inner layer , thus affecting the action of the play, attention must be used properly. Xanthan gum powder or salt , sugar and other dry materials and mix well after being stirred slowly adding water to promote feeding , prepare a solution to use.

3 . Thickening

Characteristics of xanthan gum solution having a low concentration of high viscosity ( 1% aqueous solution viscosity of 100 times gelatin ) , is a highly efficient thickener.

4 pseudoplastic

With an aqueous solution of xanthan gum in a static high or low shear viscosity at high shear viscosity performance of the sharp decline , but the molecular structure unchanged . When the shear force is removed, then immediately restore the original viscosity. Relationship between viscosity and shear is entirely plastic. Pseudoplastic Xanthan gum is very prominent , the stability of such pseudoplastic suspensions , emulsions is extremely effective.

5 . Stability to heat

Xanthan gum solution viscosity with temperature changes do not change a lot , usually by heating the viscosity polysaccharides will change , but the aqueous xanthan gum between 10-80 ℃ almost no change in viscosity, even at low concentrations aqueous solutions over a wide temperature range still showed stable high viscosity. 1% xanthan gum solution ( containing 1% KCl ) was heated from 25 ℃ to 120 ℃. Its viscosity is only reduced by 3 %.

6 . Stability of the acid-base

Xanthan gum solution of acid is very stable, unaffected PH is called its viscosity between 5-10 , with a slight change in viscosity at PH greater than 4 and 11 . In the PH3-11 range , so that the maximum and minimum values ​​of the viscosity difference of less than 10 %. Xanthan gum can be dissolved in a variety of acid solution , such as 5 % sulfuric acid , 5% nitric acid , 5% acetic acid , 10% hydrochloric acid and 25% phosphoric acid , xanthan gum , and the acid solution is quite stable at room temperature , several months parts qualitative change still does not occur. Xanthan gum is also soluble in sodium hydroxide solution , and a thickening properties. The resulting solution is stable at room temperature . Xanthan gum may be a strong oxidizing agent , such as perchloric acid, persulfuric acid degradation with increasing temperature , accelerated degradation .

7 The stability of the salts

And xanthan gum solution can be much salt solution ( potassium, sodium , calcium, magnesium , etc. ) immiscible viscosity affected. Under conditions of high salt concentration , even in a saturated salt solution which remains without precipitation and flocculation solubility , its viscosity is hardly affected.

8 . Stability of the enzymatic reaction

Xanthan gum stable double helix structure so that it has strong antioxidant and anti- enzymatic capabilities of many enzymes such as protease , amylase, cellulase and hemicellulase enzymes do not make xanthan gum degradation.

Xanthan gum is internationally Part One thickening, suspending , emulsifying, stabilizing at one. Performance of the most superior biological glue . Xanthan molecules containing side chain end how much pyruvate group , have a significant impact on its performance. Xanthan gum has the general properties of long-chain polymers , but it contains more than the average high molecular functional groups , will show unique properties under certain conditions . It conformation in aqueous solution are diverse , not the performance characteristics under different conditions .

1 suspension and emulsification

Xanthan gum on the insoluble solids and oil droplets suspended with good effect . Xanthan gum sol binding molecules can form a super helical ribbon copolymer constituting a mesh structure similar to the fragile plastic , it is possible to form the solid support particles , droplets and bubbles , the emulsion showed a strong stabilizing effect and a high suspension capacity.

(2) good water solubility

Xanthan gum can quickly dissolve in water , have a good water solubility. In particular it can be dissolved in cold water, eliminating the need for complicated process easy to use. However, because it has a strong hydrophilic , if added directly to the water is small and insufficient stirring , into the outer micelle swelling , prevents moisture from entering the inner layer , thus affecting the action of the play, attention must be used properly. Xanthan gum powder or salt , sugar and other dry materials and mix well after being stirred slowly adding water to promote feeding , prepare a solution to use.

3 . Thickening

Characteristics of xanthan gum solution having a low concentration of high viscosity ( 1% aqueous solution viscosity of 100 times gelatin ) , is a highly efficient thickener.

4 pseudoplastic

With an aqueous solution of xanthan gum in a static high or low shear viscosity at high shear viscosity performance of the sharp decline , but the molecular structure unchanged . When the shear force is removed, then immediately restore the original viscosity. Relationship between viscosity and shear is entirely plastic. Pseudoplastic Xanthan gum is very prominent , the stability of such pseudoplastic suspensions , emulsions is extremely effective.

5 . Stability to heat

Xanthan gum solution viscosity with temperature changes do not change a lot , usually by heating the viscosity polysaccharides will change , but the aqueous xanthan gum between 10-80 ℃ almost no change in viscosity, even at low concentrations aqueous solutions over a wide temperature range still showed stable high viscosity. 1% xanthan gum solution ( containing 1% KCl ) was heated from 25 ℃ to 120 ℃. Its viscosity is only reduced by 3 %.

6 . Stability of the acid-base

Xanthan gum solution of acid is very stable, unaffected PH is called its viscosity between 5-10 , with a slight change in viscosity at PH greater than 4 and 11 . In the PH3-11 range , so that the maximum and minimum values ​​of the viscosity difference of less than 10 %. Xanthan gum can be dissolved in a variety of acid solution , such as 5 % sulfuric acid , 5% nitric acid , 5% acetic acid , 10% hydrochloric acid and 25% phosphoric acid , xanthan gum , and the acid solution is quite stable at room temperature , several months parts qualitative change still does not occur. Xanthan gum is also soluble in sodium hydroxide solution , and a thickening properties. The resulting solution is stable at room temperature . Xanthan gum may be a strong oxidizing agent , such as perchloric acid, persulfuric acid degradation with increasing temperature , accelerated degradation .

7 The stability of the salts

And xanthan gum solution can be much salt solution ( potassium, sodium , calcium, magnesium , etc. ) immiscible viscosity affected. Under conditions of high salt concentration , even in a saturated salt solution which remains without precipitation and flocculation solubility , its viscosity is hardly affected.

8 . Stability of the enzymatic reaction

Xanthan gum stable double helix structure so that it has strong antioxidant and anti- enzymatic capabilities of many enzymes such as protease , amylase, cellulase and hemicellulase enzymes do not make xanthan gum degradation.