1. emulsified oil: tiny oil particles (not floating or caking) in a stable state, with a particle size of about 0.5 ~ 25 microns, are light brown to dark brown liquid or semi-solid, and belong to the category of metal cutting oil.
2. Emulsion: a high-performance semi-synthetic metal working fluid.
Second, the characteristics are different.
1. Characteristics of emulsified oil: The oil-water separation of emulsified oil is demulsification, and its performance will be lost after demulsification. Amphoteric molecules such as surfactants are adsorbed on the surface of emulsified oil particles, and the surface of oil particles has an electric double layer structure. In order to remove emulsified oil, dissolved air flotation is often used, and coagulant is added before air flotation to make emulsified oil unstable and improve air flotation effect.
2. Characteristics of emulsion: The emulsion combines the lubricity and rust resistance of oil with the better cooling property of water, and has good lubricating and cooling effects, which is very effective for high-speed, low-load and high-heat metal cutting. Compared with oil-based cutting fluid, emulsion has the advantages of strong heat dissipation, good cleaning effect and economical water dilution. In addition, it is also conducive to the health and safety of the workplace.
Extended data:
The maintenance of emulsion is much more complicated than oil-based cutting fluid. When preparing emulsion, first add water to the water tank and add emulsified oil when stirring. Avoid adding water to oil, or you will get water-in-oil emulsion with high viscosity, which is not suitable for general cutting.
The type of emulsified oil mainly depends on the nature of emulsifier. Whether emulsifier or surfactant can be dissolved in water or oil depends on the relative concentrations of hydrophilic groups and lipophilic groups. Generally, it is expressed by "the balance of affinity and repulsion" (HLB). The greater the HLB, the better the hydrophilicity.
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