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首页> 外文期刊>Journal of Applied Polymer Science >Rheological behavior of collagen/chitosan blended solutions
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Rheological behavior of collagen/chitosan blended solutions

机译：胶原蛋白/壳聚糖混合溶液的流变行为

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摘要

Understanding the rheological behavior of collagen/chitosan blends is fundamental to design the optimized collagen/chitosan composite materials. Steady shear, dynamic frequency sweep, thixotropy and creep-recovery tests were investigated to characterize the rheological behavior of collagen/chitosan blends as a function of chitosan content (0%-90% [wt/wt]). All the samples showed pseudoplasticity with shear-thinning behavior. With the increase of chitosan, the viscosity significantly decreased from 862.54 to 0.60 Pa s at 0.05 s(-1). The storage modulus and loss modulus also decreased while the dynamic denaturation temperature increased from 39.79 to 45.18 degrees C. Besides, the thixotropy weakened and when the chitosan content reached 70%, the final recovery percentage was only 4.6%. The entanglements between collagen fibers observed by atomic force microscopy became weaker. Finally, the corresponding mathematical models were used to simulate the experimental data, and the obtained parameters might provide some useful theoretical guidance for the processing of the collagen/chitosan blended solutions.
机译：了解胶原/壳聚糖共混物的流变行为是设计优化的胶原/壳聚糖复合材料的基础。研究了稳态剪切、动态频率扫描、触变性和蠕变恢复试验，以表征胶原/壳聚糖共混物的流变行为与壳聚糖含量（0%-90%[wt/wt]）的关系。所有试样均表现出剪切变稀的假塑性。随着壳聚糖添加量的增加，在0.05秒（-1）时，粘度从862.54帕秒显著降低到0.60帕秒。动态变性温度从39.79℃提高到45.18℃，储能模量和损耗模量也降低。此外，触变性减弱，当壳聚糖含量达到70%时，最终回收率仅为4.6%。原子力显微镜观察到胶原纤维之间的缠结变弱。最后，利用相应的数学模型对实验数据进行了模拟，所得参数可为胶原/壳聚糖共混溶液的加工提供有用的理论指导。

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