平行平板颗粒之间的相互作用

很多工业过程的模拟和优化 ,都需要带电颗粒双电层之间相互作用力和能的简单而准确的表达式。对DLVO理论创立以来平行平板颗粒相互作用能的计算方法作了评述 ,它包括低、中等和高表面电位的颗粒。总结了在恒电位条件下和恒电荷条件下的近似表达式 ,所列出的表达式都是近些年来所发表的准确的表达式 ,但是在不对称电解质溶液中的胶体颗粒之间的相互作用能和力的计算 ,还需要进一步研究和完善。对球颗粒之间的相互作用 ,除低电位线性近似以外 ,对中等和高电位球颗粒Derjaguin近似仍然是较好的近似方法。

Interaction Between Two Planar Parallel Surfaces

Simple yet accurate expressions for the electrical double-layer interaction force and energy between the particles that hold for a wide range of surface potential is required in the modeling, simulation, and optimization of many processes employed in industry. The interaction between two planar parallel surfaces since the establishment of DLVO theory was reviewed. It is showed that the interaction for the surface potentials from low to high can be calculated approximately and numerically. Analytical approximate expressions for various charged conditions are presented, all listed expressions are accurate ones published in recent years. However, the calculation of interaction in an arbitrary electrolytic solution needs to be studied and improved further. As to the interaction of spherical particles, Derjaguin approximation is the best approximate method up to now under moderate to high surface potentials except the linearization approximation for low surface potential.