中国造纸2017，Vol.36Issue(11)：19-23,5.DOI:10.11980/j.issn.0254-508X.2017.11.004
高浓竹浆黑液高温动态黏弹性研究
Dynamic Viscoelasticity of Thick Bamboo Kraft Pulping Black Liquor at High Temperature
摘要
Abstract
It has become a development trend that the black liquor was burned at a high solid content in alkali recovery unit.Hence,it is significant to learn and master the rheological properties of thick black liquor in order to optimize the combustion technology.The change rules of storage modulus G',loss modulus G",loss factor tanδ and dynamic viscosity η',which were important indicators of the dynamic viscoelasticity of thick bamboo kraft pulping black liquor,were investigated by using a rotational rheometer in this article.The results proved that thick black liquor still exhibited obvious elastic solid properties at high temperature.In addition,dynamic viscosity showed distinct shearthinning behavior.Black liquor could be softened by increasing the temperature.meanwhile the relaxation time of chain segments and dynamic viscosity were decreased,therefor,the flow resistance of black liquor was reduced.Cross model could very well describe the relation between η' of thick black liquor and angular frequency ω under high temperature conditions.However,the Carreau-Yasuada model could not be used to describe the relation between loss angleδ and ω.关键词
竹浆黑液/动态黏弹性/储能模量/动态黏度Key words
bamboo kraft black liquor/dynamic viscoelasticity/storage modulus/dynamic viscosity分类
资源环境引用本文复制引用
岳小鹏,杜鑫,徐永建..高浓竹浆黑液高温动态黏弹性研究[J].中国造纸,2017,36(11):19-23,5.基金项目
国家十二五科技支撑计划项目课题(2012BAD23B02). （2012BAD23B02）
