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胶体与界面化学小论文（Small papers on colloidal and interfacial chemistry）_精品
胶体与界面化学小论文（Small papers on colloidal and interfacial chemistry）
Introduction to Colloid and Surface Chemistry chapter 10 Emulsions and foams keywords: Emulsions; Foams this chapter firstly introduces some basic concepts of emulsion, first of all, the definition of emulsion (1) emulsion is a dispersion system consisting of several liquids which are completely insoluble or partially intersoluble. Generally speaking, such a system must have a relative stability or equilibrium destruction can be stratified or settled. Of course adding surfactant or using some other method can increase this stability. Now that is dispersed system, there is a different dispersed phase, generally speaking, in the form of liquid bead is suited for internal phase and dispersed phase or discontinuous phase, relative does not exist in the form of phase is the foreign minister, dispersing medium, or continuous phase. Dispersed phase droplets in the 0.1 mu m ~ 10 microns in diameter, larger than the aerosol particles, but now also made from the micro emulsion, the droplet particles in 0.01 ~ 0.1 microns, is used in the tertiary oil recovery, the micro emulsion is between plus sol group and emulsion of a system. Because of this, there are two kinds of theory of mixing membrane and solubility in the formation of microemulsion. Hybrid membrane theory, the theory is that the micro emulsion is the emulsion droplet tiny, the causes of the formation of micro emulsion can spontaneously, is a mixture of surfactant and help surfactant film can be formed on the surface of the oil - water boundary temporary negative interfacial tension. The microemulsion is formed by the fact that the micro-emulsion type gamma I has a surfactant and the oil-water interfacial tension of the surface active agent. (gamma o/w) a is the oil-water interfacial tension in the oil phase of the surfactant. PI is the oil - water interface pressure. If PI BBB 0 (gammas/w) a, gamma I is negative, the expanded interface is the system int
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