pullulánt

Pullulan is a polysaccharide produced by the yeast Aureobasidium pullulans. It is a linear polymer of glucose units linked by alpha-1,6 glycosidic bonds, with occasional alpha-1,4 linkages that create branching. Pullulan is a colorless, odorless, tasteless, and edible biopolymer. It is water-soluble and forms a strong, flexible film when dried.

Commercially, pullulan is produced through fermentation of starch by Aureobasidium pullulans. The yeast secretes pullulan into the fermentation medium, from which it is then extracted and purified. The process involves steps like filtration, precipitation, and drying.

Pullulan has found applications in various industries due to its unique properties. In the food industry, it is used as a food additive (E number E1204) for its film-forming capabilities, acting as a coating for confectionery and baked goods to reduce moisture loss and extend shelf life. It is also used as a binder and thickener. In the pharmaceutical industry, pullulan is employed in the production of capsules for dietary supplements and medications, offering a vegan alternative to gelatin. Its biocompatibility and biodegradability make it suitable for drug delivery systems and medical implants. Furthermore, pullulan is explored in the cosmetics industry for its film-forming and moisturizing properties in skincare products. Research continues to investigate its potential in other areas, including biodegradable packaging and biomaterials.