黄原胶溶液及其冻胶的流变特性研究

发布时间：2018-03-24 06:09

  本文选题：黄原胶　切入点：有机锆交联剂　出处：《精细石油化工》2017年03期

【摘要】：为拓宽黄原胶(XG)的应用范围,采用一种有机锆交联剂ZW35对黄原胶溶液进行交联,形成黄原胶冻胶。对黄原胶溶液及其冻胶的交联比、剪切变稀性、粘弹性、触变性以及耐温耐剪切性能进行了研究。结果表明,0.2%XG溶液的表观黏度为17.5mPa·s,随着交联剂用量的增加,黄原胶冻胶的表观黏度先增加后降低,在交联剂用量为0.4%时,表观黏度达到较大值200.4mPa·s。黄原胶冻胶的弹性模量G′、黏性模量G″和触变环面积均比黄原胶溶液有显著的提高,表明黄原胶冻胶的网络结构强度得到增强。0.2%XG溶液在30℃的表观黏度为17.5mPa·s,而黄原胶冻胶(0.2%XG+0.4%ZW35)在80℃、170s~(-1)下剪切90min后的保留黏度仍有82.6mPa·s,耐温耐剪切性得到提高。黄原胶溶液及其形成的黄原胶冻胶均呈现出剪切变稀特性,其流动曲线均可采用非线性共转Jeffreys本构方程进行表征,各体系的模拟值与实验值吻合良好。
[Abstract]:In order to widen the scope of application of XG, xanthan gum solution was crosslinked by an organic zirconium crosslinking agent ZW35 to form xanthan gum gel. The crosslinking ratio, shear thinning and viscoelasticity of xanthan gum solution and its gel were studied. The thixotropy and shear resistance of xanthan gel were studied. The results showed that the apparent viscosity of XG solution was 17.5mPa s. With the increase of crosslinking agent, the apparent viscosity of xanthan gel first increased and then decreased, and when the amount of crosslinking agent was 0.4g, the apparent viscosity of xanthan gel first increased and then decreased. The apparent viscosity of xanthan gel was higher than that of xanthan gel. The elastic modulus, viscosity modulus G "and thixotropic ring area of xanthan gel gel were significantly higher than those of xanthan gum solution. The results show that the network structure strength of xanthan gel gel is enhanced. 0.2 XG solution has 17.5mPa s apparent viscosity at 30 鈩，

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