流场对超浓悬浮体系的内部结构影响  

Effect of shear fields on internal structure of the highly concentrated suspensions

作　　者：郭营[1] 王刚[2] 许元泽[1,2] 俞炜[1] 周持兴[1] 

机构地区：[1]上海交通大学化学化工学院流变学研究所,上海200240 [2]复旦大学高分子系,上海200433

出　　处：《固体火箭技术》2009年第1期70-73,共4页Journal of Solid Rocket Technology

摘　　要：研究了超浓悬浮体系的流变性质,发现在类似"临界凝胶点"的临界浓度附近出现从类液态向类固态的突变,表明体系出现完整的内部结构。触变环流变实验表明,内部结构发生了破坏和重建,与剪切速率、观测时间和松弛时间有依赖关系。采用结构化网络模型可准确描述体系的触变特性。The rheological behavior of highly concentrated suspensions was investigated. The results show a mutation from liquid-like state to solid-like state occurs ,which means that there exists an intact internal structure. The thixotropy study of the slurries internal structure under the transient shear fields indicates that the break-up and reconstruction occur in interior structure depending on the shear rate,observation time and relaxation time. By using a structural model to describe the thixotropy of the slurri~, good predictions can be attained.

关 键 词：超浓悬浮体系 药浆 结构 临界浓度 粘弹性 屈服应力 触变性 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]