碳添加剂对聚丙烯腈溶液流变性影响的研究  

Effect of Carbon Additives on the Rheological Behavior of PAN Solutions

作　　者：吴雪平[1] 盛丽华[1] 张先龙[1] 陈敏[1] 陈天虎[2] 朱王勇[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合成纤维》2008年第12期29-34,共6页Synthetic Fiber in China

基　　金：国家自然科学基金项目(40772031);863计划项目(2006AA03337);合工大博士专项(106-035030)

摘　　要：以碳纳米管(MCNT)和碳黑(CB)为添加剂,采用溶液共混的方法,讨论了添加剂浓度、放置时间、温度、剪切速率对聚丙烯腈溶液的表观黏度及黏流活化能(ΔΕη)的影响。结果表明:随着MCNT含量的增加,聚丙烯腈溶液的黏度先增大后减小,添加1.0%MCNT时,聚丙烯腈溶液的黏度最大,活化能也同时达到最大;随着碳黑含量的增加,黏度与活化能都随之增加,但增加幅度不大。两种PAN溶液都属于明显的切力变稀的非牛顿流体,随着剪切速率的增加,黏度下降;但在高切变速率(>800s-1)时,黏度几乎不变。Micro-carbon/PAN solutions were prepared by blending carbon nanotubes （MCNT） and carbon black （CB）. In this paper, the effect of micro-carbon concentration, time, temperature and shear rate on viscosity and activation energy of viscous flow （△Eη） were studied. The results indicated that the viscosity of PAN solution firstly increased along with the increase of MCNT concentration, and then decreased. When MCNT concentration was 1.0 %, the viscosity of solution was largest and the △Eη value also achieved a largest, the viscosity and/△Eη increased along with the increase of carbon black concentration. Two varieties of PAN solutions belong to non- Newton fluid. The viscosity of PAN solution decreased along with shear rate increasing. But at higher shear rates （〉800 s^-1）, the viscosity of the solutions were almost invariability.

关 键 词：聚丙烯腈 碳纳米管 碳黑 流变性 

分 类 号：TQ342.31[化学工程—化纤工业]