Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, 30 Quai Ernest-Ansermet, 1205 Geneva, Switzerland.
Department of Physics, Faculty of Sciences, Yazd University, Yazd 89195-741, Iran.
Phys Chem Chem Phys. 2019 Sep 11;21(35):18866-18876. doi: 10.1039/c9cp01985e.
The aggregation behavior of particles in nonpolar media is studied with time-resolved light scattering. At low surfactant concentrations particles are weakly charged and suspensions are not stable. The suspensions become progressively more stable with increasing surfactant concentration as particles become more highly charged. At high concentrations the particles become neutralized and aggregation is again fast. The theory of Derjaguin, Landau, Verwey, and Overbeek (DLVO) is able to predict the stability ratios quantitatively by using the experimentally measured surface charges, screening lengths and van der Waals forces.
用时间分辨光散射研究非极性介质中颗粒的聚集行为。在低表面活性剂浓度下，颗粒带弱电荷，悬浮液不稳定。随着表面活性剂浓度的增加，颗粒带电量增加，悬浮液变得越来越稳定。在高浓度下，颗粒被中和，聚集再次变得迅速。德加古林、朗道、维韦和奥弗贝克（DLVO）理论通过使用实验测量的表面电荷、屏蔽长度和范德华力，能够定量地预测稳定性比。
