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

作　　者：岳小鹏[1,2] 杜鑫 徐永建[1,2] Y U E X i a o - peng;D U Xin;X U Yong- jian(Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper, Shaanxi University of Science ＆ Technology, Xi’a n, Shaanxi Province, 710021;National Demonstration Center for Experimental Light National Demonstration Center （ Shaanxi University of Science ＆ Technolo^gy, Xi＇an, Shaanxi Province, 710021;College.了 Mechanical andElectrical Engineer, Shaanxi University o Science ＆ Technology, X ia n, Shaanxi Province, 710021)

机构地区：[1]陕西科技大学陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]轻化工程国家级实验教学示范中心(陕西科技大学),陕西西安710021 [3]陕西科技大学机电工程学院,陕西西安710021

出　　处：《中国造纸》2017年第11期19-23,共5页China Pulp & Paper

基　　金：国家十二五科技支撑计划项目课题(2012BAD23B02)

摘　　要：实现造纸黑液的高浓燃烧已成为碱回收单元的发展趋势,了解并掌握高浓黑液的流变学性质对优化改进黑液燃烧技术具有重要意义。本研究利用动态流变仪对高浓竹浆黑液的动态黏弹性进行了研究,阐明了储能模量(G')、损耗模量(G″)、损耗因子(tanδ)与动态黏度(η')的变化规律。结果表明,高浓竹浆黑液在高温下表现出较强的弹性固体性质,动态黏度呈现出显著的剪切稀化特性。提高温度有助于黑液软化,缩短链段松弛时间,降低动态黏度,减小流动阻力。Cross模型可以很好地描述高温条件下高浓竹浆黑液η'与角频率(ω)的关系,但Carreau-Yasuada模型不适用于描述耗散角(δ)与ω的关系。It has become a development trend that the black liquor was burned at a high nificant to learn and master the rheological properties of tliick black licjuor in order to optimize of storage modulus P ,loss modulus P ,loss factor tans and dynamic viscosity %,which were important indicators of tlie dynamic viscoelas-ticity of tliick bamboo kraft pulping black licjuor,were investigated by using a rotational rheometer in this article. The results proved that thick black licjuor still exhibited obvious elastic solid properties at high temperature. In addition,dynamic thinning behavior. Black liquor could be softened by increasing the temperature, meanwhile the relaxation ic viscosity were decreased,therefor,the flow resistance of black licquor was reduced. Cross model could very well descril^e the relation be-tween % of tliick black licquor and angular frequency ＆ under high temperature conditions. However,the Carreau-Yasuada model could notbe used to describe the relation between loss angle $ and ＆

关 键 词：竹浆黑液 动态黏弹性 储能模量 动态黏度 

分 类 号：X793[环境科学与工程—环境工程]