Home
Vacuum emulsifying machine
Mixing equipment
Polyester device
Products
Case
News
About
Contact

News Center

The company has established the enterprise goal of "survival by quality, reputation by quality, and development by quality. Strengthen the training of technical personnel, and constantly enrich the first-line technical force to ensure the normal operation of the quality assurance system.

Industry News

Company News

Home page

Emulsification method for preparing emulsion in homogeneous emulsifying machine

Release time:

2019-08-26

The emulsification method for the preparation of emulsions, in addition to the primary soap method, the agent in water method, the agent in oil method, there are:

oil-water mixing
Usually this method is carried out in two containers, the water and oil phases are carried out in two containers, the lipophilic emulsifier is dissolved in the oil phase, the hydrophilic emulsifier is dissolved in the water phase, and the emulsion is carried out in the third container (or in the water line). Each phase is alternately added in small quantities to the emulsification vessel until one of the phases has been added and the rest of the other phase is added in a trickle. Such as the use of water homework system, the water, oil two-phase according to its accurate proportion of continuous input system.
phase inversion emulsification
Prepare the internal phase in a larger container and emulsify it here.Homogenizing emulsifying machinecarried out in a container. (If you want to makeO/W type emulsion, the oil phase is prepared in the emulsification container.) The other phase (the external phase, in the example the aqueous phase), which has already been prepared, is added in the form of a thin stream or in portions. At first, W/O type emulsion was formed, water bearing increased one after another, and the emulsion gradually thickened. However, after the water phase was added to 66%, the emulsion turned thin and turned into O/W type emulsion. The remaining water phase was added more quickly, and the O/W type emulsion was finally obtained. A W/O type emulsion can be prepared similarly to this example. This method is called phase inversion emulsion method, and the emulsion obtained by this method is very fine and average.
LEE
The general emulsification method is to heat the external phase and the internal phase to about 80 ° C (75-90 ° C) for emulsification, and then stir and cool. In this process, a large amount of energy is consumed. However, from a theoretical point of view, emulsification does not require so much energy. The energy required for emulsification only affects the dispersion of the emulsion and the reduction of surface tension caused by surfactants. Theoretically, the required energy can be calculated, which is much less than the energy consumed by usual emulsification, indicating that there is a large amount of energy extravagance in the usual emulsification method, such as the heat taken away by cooling water is discarded in vain. Therefore, J.J.Lin (Lin Joseph) proposed a low energy emulsification method. The principle of the method is that during emulsification, the external phase is not completely heated, but the external phase is divided into two sectors, α phase and β phase, α and β respectively represent the weight fraction of α phase and β phase (α β = 1 here), only the β phase sector is heated, the internal phase and β phase are emulsified to prepare a concentrated emulsion, and then diluted with α external phase at normal temperature to finally obtain the emulsion. The principle can be shown in the following figure. Obviously, this emulsification method saves a lot of energy, and the energy saving efficiency increases with the increase of the ratio of external phase/internal phase and α/β. This method not only saves energy, but also improves the efficiency of the emulsified product, such as shortening the manufacturing time, because the cooling process time can be greatly shortened, and energy can be saved by reducing the use of cooling water. This low-energy emulsification method is not only used in the manufacture of lotions and creams, but can also be used in the manufacture of shampoos, but it is mainly used in the preparation of O/W emulsions. The above-mentioned low-energy emulsification method is only a basic principle, the actual application, can be based on the type of emulsion, oil, water phase ratio and its viscosity and other detailed requirements, design a feasible low-energy emulsification scheme, its detailed manipulation process, the quality of the emulsion has an impact.