Interaction between particles in a nonwetting liquid
Interaction between particles in a nonwetting liquid
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DOI：
10.1016/0021-9797(83)90035-8
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发表时间：
1983-12
影响因子：
9.9
通讯作者：
V. S. Yushchenko;V. V. Yaminsky-V.;Eugenie D Shchukin
中科院分区：
文献类型：
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作者：
V. S. Yushchenko;V. V. Yaminsky-V.;Eugenie D Shchukin
对疏液颗粒接触区周围液体中空穴的形成和稳定性进行了能量分析，并计算了空穴的参数。液体的后退对于接触颗粒以及对于由不宽于某一值He的间隙H分离的颗粒在热力学上是有利的。在前一种情况下，空腔的形成是一个非活化过程，而在后一种情况下，它涉及克服一定的活化势垒，其高度（Δ H2）达到10 kT在H Δ 0.3 nm（疏水化玻璃珠在水中）。当粒子被分离时，腔在一定的间隙宽度范围内保持亚稳态（H>He）。空腔的直径和He比分子的大小大得多;空腔的形成使粒子之间相互作用的自由能急剧增加，在比分子力大得多的距离上提供它们的吸引力，并增强与空气中的粘附力相比的粘附力。
The energy analysis of formation and stability of a cavity in a liquid around the zone of contact between lyophobic particles has been carried out and the parameters of the cavity have been calculated. The receding of the liquid is thermodynamically advantageous for contacting particles as well as for those separated by a gapHnot wider than a certain valueHe. In the former case the formation of the cavity is a nonactivation process, while in the latter instance it involves the overcoming of a certain activation barrier whose height (∼H2) reaches 10 kT at H ≈ 0.3 nm (hydrophobized glass beads in water). As the particles are being separated, the cavity remains metastable in a certain range of gap widths (H>He). The diameter of the cavity andHeare much greater than the molecular sizes; the formation of the cavity gives rise to a sharp increase in the free energy of interaction between the particles, provides for their attraction at considerably greater distances than the molecular forces, and enhances the force of adhesion as against that in air.