Exudate gums emulsifiers

Acacia gum A mixture of structurally related polysaccharides, the main one is based on P-D-galactopyranose residues Natural plant exudates solutions are stable at pH 2-7 and display relatively low viscosity Emulsifying or suspending agents, adhesive and binders (in tablets)... 

Gum arable is the gummy exudate obtained from Acacia trees in Africa, primarily in Sudan. It is a highly branched polysaccharide containing both neutral monomers and uronic acids covalently attached with proteinaceous fractions, rendering its excellent function as an extensively used emulsifier with molecular weight about 250,000. It is highly soluble, producing low viscosity solution even at 40% concentration. The solution shows Newtonian behavior with constant viscosity at different shear rates. 

Gum arabic is widely used as an emulsifier in the beverage industry to stabilize cloud and flavor emulsions [98]. It is derived from the natural exudate of Acacia Senegal, and consists of at least three high molecular weight biopolymer fractions The surface-active fraction is believed to consist of branched arabinogalactan blocks attached to a polypeptide... 

This has prompted research activities all over the world to find alternative feedstocks for polymers. Agricultural by-products and forest products have become more attractive these days as renewable resources for polymers and plastics additives. Plant exudates such as gum arable, gum ghatti, gum karaya, gum tragacanth etc. have been used in textiles, cosmetics and pharmaceuticals mainly as emulsifiers and thicknersl. Other types of gums from seed such as guar gum have similarly been used. But these have not been utilized as the raw material for polymer manufacture. 

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