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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Effect of concentration and temperature on the rheological behavior of collagen solution
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Effect of concentration and temperature on the rheological behavior of collagen solution

机译：浓度和温度对胶原蛋白溶液流变行为的影响

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摘要

Dynamic viscoelastic properties of collagen solutions with concentrations of 0.5-1.5% (w/w) were characterized by means of oscillatory rheometry at temperatures ranging from 20 to 32.5 degrees C. All collagen solutions showed a shear-thinning flow behavior. The complex viscosity exhibited an exponential increase and the loss tangent decreased with the increase of collagen concentration (C-COL) when the C-COL >= 0.75%. Both storage modulus (G') and loss modulus (G '') increased with the increase of frequency and concentration, but decreased with the increase of temperature and behaved without regularity at 32.5 degrees C. The relaxation times decreased with the increase of temperature for 1.0% collagen solution. According to a three-zone model, dynamic modulus of collagen solutions showed terminal-zone and plateau-zone behavior when CCOL was no more than 1.25% or the stated temperature was no more than 30 degrees C. The concentrated solution (1.5%) behaved being entirely in plateau zone. An application of the time-temperature superposition (TTS) allowed the construction of master curve and an Arrhenius-type TTS principle was used to yield the activation energy of 161.4 kJ mol(-1). (C) 2008 Elsevier B.V. All rights reserved.
机译：浓度为0.5-1.5％（w / w）的胶原蛋白溶液的动态粘弹性特性是通过振荡流变法在20至32.5摄氏度的温度范围内表征的。所有胶原蛋白溶液均表现出剪切稀化的流动行为。当C-COL> = 0.75％时，复数粘度随胶原浓度（C-COL）的增加而呈指数增加，损耗角正切减小。储能模量（G'）和损耗模量（G''）随频率和浓度的增加而增加，但随温度的升高而降低，并且在32.5摄氏度下表现为不规则。弛豫时间随温度的升高而降低1.0％胶原蛋白溶液。根据三区模型，当CCOL不超过1.25％或规定温度不超过30摄氏度时，胶原蛋白溶液的动态模量表现出末端区和高原区的行为。浓缩液（1.5％）表现出完全处于高原地区。时间-温度叠加（TTS）的应用允许构造主曲线，并使用Arrhenius型TTS原理产生161.4 kJ mol（-1）的活化能。 （C）2008 Elsevier B.V.保留所有权利。

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