The physicochemical properties of emulsions stabilized by surfactants depend on the film drainage and coalescence behavior between dispersed drops in a system.The combination of direct measurement of the interaction f...The physicochemical properties of emulsions stabilized by surfactants depend on the film drainage and coalescence behavior between dispersed drops in a system.The combination of direct measurement of the interaction forces between soft matters by AFM and the prediction of the film drainage process by the SRYL model helps to explore the dynamic behavior of droplets in the emulsion system.In this review,novel experimental designs and recent advances in experimental methodologies for solving interaction forces,interfacial deformation and drop coalescence are presented,which show the advantage of using AFM as a tool for probing colloidal interactions.The effects of hydrodynamic forces,both DLVO and non-DLVO forces,on the emulsion stabilization mechanism are discussed.In addition,an outlook is presented to discuss the further development of the relevant technology and the problems that need to be solved.展开更多
Solvent extraction is now finding applications in a broader range of fields than the past. Many of these applications require process equipment with shorter contact times, and in some cases to the point where the trad...Solvent extraction is now finding applications in a broader range of fields than the past. Many of these applications require process equipment with shorter contact times, and in some cases to the point where the traditional equilibrium stage approach is not a good model for predicting performance. In addition, feed streams are becoming lower in concentration of the solute. This means greater feed to solvent flow ratios are being used and so loss of organics as entrainment in the feed is more of a concern both economically and environmentally. These trends mean that a greater emphasis is being placed on the kinetics of extraction and stripping in models to predict performance and on formation and coalescence of drops to control entrainment. This paper reviews recent advances in the tools for investigating kinetics and coalescence in solvent extraction processes and some of the insights that are being uncovered in these fundamental processes in solvent extraction technology.展开更多
基金the National Natural Science Foundation of China(Grant Nos.51774303,51422406&51534007)the National Science and Technology Specific Project(Grant No.2016ZX05028004-001)+1 种基金the Henry Fok Foundation(Grant No.142021)the Science Foundation of China University of Petroleum,Beijing(Grant No.C201602)for providing financial support for this research
文摘The physicochemical properties of emulsions stabilized by surfactants depend on the film drainage and coalescence behavior between dispersed drops in a system.The combination of direct measurement of the interaction forces between soft matters by AFM and the prediction of the film drainage process by the SRYL model helps to explore the dynamic behavior of droplets in the emulsion system.In this review,novel experimental designs and recent advances in experimental methodologies for solving interaction forces,interfacial deformation and drop coalescence are presented,which show the advantage of using AFM as a tool for probing colloidal interactions.The effects of hydrodynamic forces,both DLVO and non-DLVO forces,on the emulsion stabilization mechanism are discussed.In addition,an outlook is presented to discuss the further development of the relevant technology and the problems that need to be solved.
文摘Solvent extraction is now finding applications in a broader range of fields than the past. Many of these applications require process equipment with shorter contact times, and in some cases to the point where the traditional equilibrium stage approach is not a good model for predicting performance. In addition, feed streams are becoming lower in concentration of the solute. This means greater feed to solvent flow ratios are being used and so loss of organics as entrainment in the feed is more of a concern both economically and environmentally. These trends mean that a greater emphasis is being placed on the kinetics of extraction and stripping in models to predict performance and on formation and coalescence of drops to control entrainment. This paper reviews recent advances in the tools for investigating kinetics and coalescence in solvent extraction processes and some of the insights that are being uncovered in these fundamental processes in solvent extraction technology.
