中文摘要：

用旋转流变仪研究胶原溶液的稳态流变性能,讨论了浓度和温度的变化对胶原溶液流动曲线的影响。实验数据显示胶原溶液的剪切粘度随着剪切速率的增大而降低,表明胶原溶液具有明显的假塑性。同一剪切速率下,温度升高,胶原溶液的剪切粘度降低;浓度增大,剪切粘度增大。用幂律方程、Carreau方程和Cross方程对胶原溶液的流动曲线进行数学拟合,结果表明幂律方程,Carreau方程和Cross方程都能准确地描述胶原的流动曲线,其中幂律方程的粘度指数K和非牛顿指数n的变化能准确反映胶原假塑性的变化;Carreau方程和Cross方程的参数比幂律方程多,其拟合得到的曲线和实验数据吻合得更好。但在本实验条件下,Carreau方程和Cross方程预测的零剪切粘度η0和无穷剪切粘度η∞不准确。

英文摘要：

The steady rheological behaviors of collagen solution were studied by coaxial viscometer.The effects of concentration and temperature on the flow curve of collagen solution were discussed.The experimental data showed that viscosity decreased with increasing shear rate,indicating that collagen solution was pseudo-plastic.At the same shear rate,the viscosity of collagen solution decreased with increasing temperature but increased with increasing concentration.Ostwald-de wale model,Carreau model and Cross model were used to fit the experimental data.The results indicated that Ostwald-de wale model,Carreau model and Cross model could all accurately describe the flow curve of collagen solution.The values of consistency index K and flow behavior index n,obtained from Ostwald-de wale model,could accurately reflect the changes of pseudo-plastic behavior.Compared with Ostwald-de wale model,Carreau model and Cross model had more parameters and were more accurate to coincide with the experimental data,however,both the zero-shear rate viscosity η0 and the infinite-shear rate viscosity η∞ of Carreau model and Cross model were inexact on the experimental conditions.