氧化物Zeta电位影响因素研究进展

Research Progress in Influence Factors of Zeta Potential of Oxides

文章主要探究了氧化物和过氧化物在固-液界面Zeta电位的影响因素,以及Zeta电位在颗粒悬浮液和液-液乳状液中的重要性。介绍了测定Zeta电位的方法和相关实验研究成果,包括表面活性剂、pH值、离子强度等因素对Zeta电位的影响。实验结果表明,pH值是影响Zeta电位的显著因素之一,与颗粒表面电荷分布紧密相关。不同的研究指出,通过控制pH值,可以显著改变如ZnO、TiO_(2)、CeO_(2)等材料表面的Zeta电位,进而影响在液体介质中的稳定性。表面活性剂的种类和浓度同样对Zeta电位有显著影响,通过选择适当的表面活性剂,可以有效调节悬浮液的稳定性。粒径和浓度的不同也会影响Zeta电位,粒径对电荷密度和电势分布有显著影响,对颗粒悬浮液的稳定性也至关重要。同样温度对表面或界面反应也对Zeta电位有影响,如官能团的解离和质子化及吸附过程。

In this paper,the influence factors of Zeta potential of oxides and peroxides at solid-liquid interface and the importance of Zeta potential in particle suspensions and liquid-liquid emulsions are investigated.The method for measuring Zeta potential and the related experimental results are introduced,including the influence of surfactant,pH value,ionic strength and other factors on Zeta potential.The experimental results show that pH value is one of the significant factors affecting Zeta potential,which is closely related to the surface charge distribution of particles.Different studies have pointed out that by controlling the pH value,the Zeta potential on the surface of materials such as ZnO,TiO_(2) and CeO_(2) can be significantly changed,thus affecting the stability in liquid media.The type and concentration of surfactants also have significant effects on Zeta potential,and the stability of suspensions can be effectively adjusted by selecting appropriate surfactants.The differences in particle size and concentration may also affect Zeta potential.Particle size has a significant effect on charge density and potential distribution,and is also crucial for the stability of particle suspensions.Temperature also has an impact on surface or interface reactions as well as Zeta potential,such as the dissociation and protonation of functional groups and the adsorption processes.