Determination of the effective charge numbers of colloidal spheres by electrophoretic mobility measurements
Determination of the effective charge numbers of colloidal spheres by electrophoretic mobility measurements
复制标题
通过电泳迁移率测量确定胶体球的有效电荷数
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
T. Okubo
中科院分区：
文献类型：
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作者：
T. Okubo
用电泳法测定了单分散聚苯乙烯胶乳(直径91∼2950 nm，电荷密度1.0∼3010°C/cm2)的有效电荷数。去离子悬浮液中的游离大离子和/或大离子(β)的比例小于1，并且随着球面分析价态(Z)的增加而迅速下降。得到了去离子悬浮液的对数β=2.61-0.87logZ的关系式。β-值随氯化钠的加入而减小。β适用于有机溶剂-水混合物(有机溶剂：甲醇、乙醇、丙醇、1，4-二氧六环、乙二醇、丙二醇、N-甲基甲酰胺。和N-甲基乙酰胺)被确定为有机溶剂体积分数的函数。
The effective charge number of colloidal spheres was determined for monodisperse polystyrene latices (91∼2950 nm in diameter and 1.0 ∼ 3010°C/cm2 in charge density) by electrophoretic mobility measurements. The fraction of free macroions and/or gegenions (β) in deionized suspension is smaller than unity and decreases rapidly with increasing sphere analytical valency (Z). The relation, logβ = 2.61-0.87 log Z is obtained for the deionized suspension. The β-value decreases on the addition of sodium chloride. β for the organic solvent-water mixtures (organic solvents: methanol, ethanol, propanol, 1,4-dioxane, ethylene glycol, propylene glycol, N-methylformamide. and N-methylacetamide) is determined as a function of volume fraction of the organic solvent.