Experimental study for rheological property of exhaustively deionized aqueous suspension of very small colloidal spheres (diameter < ca. 60 nm)
Experimental study for rheological property of exhaustively deionized aqueous suspension of very small colloidal spheres (diameter < ca. 60 nm)
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极小胶体球（直径<约60 nm）彻底去离子水悬浮液流变特性的实验研究
DOI：
10.1016/j.powtec.2015.02.028
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发表时间：
2015
影响因子：
5.2
通讯作者：
Akira TSUCHIDA
中科院分区：
文献类型：
--
作者：
Hiroshi KIMURA;Shinya TAKAHASHI;Akira TSUCHIDA
本文研究了小二氧化硅球（直径18-56 nm）在完全去离子状态和盐存在下的水悬浮液的流变性质。在去离子状态下，直径为29 nm和56 nm的较大球体的悬浮液在球体体积分数ε = 0.10时为牛顿流体，尽管最小球体18 nm的悬浮液在ε = 0.087时显示出剪切稀化。德拜屏蔽长度是根据电导率计算的。在上述条件下，对于直径为18 nm、29 nm和56 nm的球，悬浮液的有效体积分数（包括双电层）分别为0.37、0.23和0.21。实验提供了强有力的证据表明，所有的小球在水中形成稳定的双电层，18 nm的球悬浮液是在玻璃态。
The rheological properties of aqueous suspensions of small silica spheres (18–56 nm in diameter), in an exhaustively deionized state and the presence of a salt, have been investigated. In a deionized state, the suspensions of larger spheres, 29 nm and 56 nm in diameter, were Newtonian fluids at sphere volume fractionϕ= 0.10, although the suspension of the smallest spheres, 18 nm, showed shear thinning atϕ= 0.087. Debye screening lengths were calculated based on electrical conductivity. The effective volume fractions, including the electrical double layers, of suspensions in the above condition were 0.37, 0.23, and 0.21 for spheres of 18 nm, 29 nm, and 56 nm in diameter, respectively. Experiments provide strong evidence that all of the small spheres form steady electrical double layers in water and that the suspension of 18-nm spheres was in a glassy state.