| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: methods involve obtaining a bacterial cellulose product through fermentation, possible lysis of bacterial cells from the bacterial cellulose product, mixing it with at least one polymeric thickener or precipitating agent and coprecipitation of the obtained mixture with alcohol. The bacterial cell lysis step can be performed after mixing with the precipitating agent. The polymeric thickener used can be at least one charged cellulose ester, at least one precipitating agent or combination thereof. The composition obtained using said method, having improved rheological properties and containing bacterial cellulose, has viscosity of at least 300 cP (300 mPas) and tensile yield 1.0 dine/cm2 (0.1 N/m) when more than 0.36 wt % of it is put into a 500 ml water sample and after application of not more than two passages in an extensional homogeniser at pressure 1500 lb/in2 (10342.5 kPa). ^ EFFECT: improved rheological properties of the composition. ^ 31 cl, 20 ex |
