大豆皮胶态微晶纤维素的流变学性质研究

Study on the rheological properties of microcrystalline cellulose from soybean hulls

研究了浓度、剪切速率、剪切时间、静置时间、温度、金属离子等对大豆皮胶态微晶纤维素溶液粘度的影响。结果表明:大豆皮胶态MCC在水中可形成凝胶,低浓度的凝胶(小于2%)具有触变性;大豆皮胶态MCC溶液具有典型的剪切稀变性、良好的时变性和热稳定性;二价金属离子会使大豆皮胶态MCC溶液的粘度显著下降,当其浓度达到0.15mol/L或以上时,其假塑性会降低。

Effects of thickness, shearing rate,temperature, metal ion, shearing and stewing time on the rheological characteristics of microcrystalline cellulose from soybean hull were studied in this paper. Results showed that colloidal microcrystalline cellulose from soybean hulls formed gel in water and the low concentration solution（ less than 2%）had the character of thixtropy. The solutions of colloidal soybean hulls microcrystalline cellulose had pseudoplastic behaviour and good thermal stability. Bivalent metal ions made the viscosity of the solutions decrease a lot and when the concentrations of bivalent metal ions rose to O.lSmol/L or more,the pseudoplastic behavior of the solution reduced.