两种相互难以相溶的液体,在机械与乳化剂的作用下,将一种液体稳定的分散干另一种液体之中,这种现象称为“乳化”。由于各种液体内部的分子之间相互有吸力存在,在两种液体之界面间有界面张力存在,将两种不相溶的液体使其机械的混合,一旦静止仍然分为两层。因为两种液体有各自尽量缩小其接触面积的作用。要想将一种液体以微小粒径分散于另一种液体之中,必将使其表面积扩大至若干倍,这样在外部必须要为克服两种液体的界面张力而做功,设r为 Two kinds of mutually incompatible liquids, under the action of mechanical and emulsifying agents, will disperse one liquid into another liquid stably, a phenomenon called “emulsification.” Due to the mutual attraction of molecules inside the various liquids, there is interfacial tension between the two liquid interfaces, which mechanically mix the two immiscible liquids and, once static, divide into two layers. Because the two liquids have their own role in minimizing their contact area. To a liquid with a small particle size dispersed in another liquid, it is necessary to expand its surface area to several times, so in the external must overcome the two liquids interfacial tension and work, let r