METHOD FOR UTILIZING AN EXOCELLULAR POLYSACCHARIDE ISOLATED FROM ZOOGLOEA RAMIGERA.

摘要

process for the use of purified exocellular polysaccharide produced by zoogloea, zooglan, ramigera as a viscosity modifier, a gelling agent, an agent for reducing tension, a dispersion agent, a flocculating agent, emulsifying agent, the properties of the the polymer is dependent on the ph, the concentration of the polymer.the ions in the solution, and as the processing parameters such as the shear mechanical properties of the polymer can be changed by varying the values. the overall conformation of the zooglan, responsible for its functional properties can be manipulated with the ph and / or the ions in the solution.for example, the intrinsic viscosity of the zooglan (apparent molecular weight = 2 x 107) may vary between 16 and 170 dl / g in aqueous solution as a function of ph between 2 and 9, and a salt concentration from 0 to 1 m kcl. the zooglan is a polyelectrolyte above ph 2. the chain of zooglan is relatively high, with a stiffness parameter is equal to 0.02.zooglan solution at a concentration greater than 0.01 g / dl are viscoelastic and thixotropic pseudoplastiques with hysteresis and critical stress of flow. the effects of shear rate and shear viscosity of the solutions of zooglan is recoverable or not in accordance with the requirements of the solution.the zooglan can form a gel or a web of the channel network. the wide range of functional properties of zooglan molecule effective to be used in a variety of products such as pharmaceuticals, cosmetics and personal care, food products, textiles, paints, inks, and pa pier.