Homogenizer application process

The homogenizer is ultra-fine pulverization and emulsification. Whether it is theoretically or the quality and uniformity of the emulsion and dispersion actually processed, it is high-speed mixing, sanding, ball milling, colloid grinding, and ultrasonic. Equal homogenization equipment can not be compared. However, if the application is not correct or appropriate in the process, and satisfactory results are not obtained, at least it is impossible to obtain the best results.

The size of the pressure selected for homogenization determines the amount of energy that the material acquires. In general, the energy required for pulverization should vary depending on the viscosity of the material, the surface tension of the liquid, and the size of the final pulverization. Pressure is not enough, and too much pressure is not necessary. The smaller the particle size of the material is, the greater the energy required. In general, the homogenization pressure increases, and the average particle size of the particles decreases, but the rate at which the particle size becomes smaller decreases. This shows that even with the high pressure, the function of the homogenizer to crush the fineness is not unlimited. In the case of the homogenizer of the conventional structure, the ultimate pulverization fineness is 0.1-0.2 μm. ~

The size of the initial particle size and the uniformity of the particle size are one of the important factors affecting the homogeneous quality. The process requires that the initial particle size of the material should not only be as small as possible (generally should not be greater than 20 μm), but also must be rough-processed by a low-energy homogenizer to make the particle size as uniform as possible. The uneven size of the original material is difficult to obtain high quality products when homogeneous.

The amount of oil in the mixture is also an important factor in determining its quality. When the energy density applied to the mixture is the same, an increase in the fat content means that the decrease in the average energy obtained by the unit directly affects the quality of the mixture. Experiments have shown that within a certain range, the reduction of the proportion of oil and fat is also one of the ways to increase the homogenization effect. The maximum proportion of the oil content of the mixture should be less than 50%.

The viscosity of the material is also closely related to the homogenization effect and the homogenization efficiency. When the homogenization pressure is constant, the viscosity of the material increases, for example, from 2CP to 200CP, the particle size of the material becomes larger, the viscosity exceeds 200CP, and the particle size becomes larger. Therefore, the viscosity of the material is lower than 200CP, and the homogenization effect is more effective. In the process, in order to achieve a lower viscosity, a simple and effective method is to heat the material. For the specific materials, such as the emulsification of the resin, it is convenient and effective to reduce the viscosity of the grease by using the oil and fat in a specific solvent.

There is also a problem with the number of processing times in the homogenizing machining process. The homogenizer is only processed once, and it is difficult to obtain the same energy for particles of different sizes, with the result that the uniformity is not ideal. Experiments show that in the homogenization process, large particles are easier to obtain energy and are pulverized into fine particles, while the smaller particles are relatively difficult. For these two reasons, multiple homogenizations are required in the process. After several times of homogenization, not only the particles become smaller, but also the particle size gradually becomes uniform, and the homogenization effect is greatly improved. The maximum number of effective homogenization is nine times, more than nine times, the effect and energy consumption ratio will not be worth the loss.