Differentians are additives commonly used in chemical, material science and pharmaceutical fields, which are used to promote the dispersion and stability of particles or solid substances in liquid. Depending on the mechanism and chemical nature of its role, common dispersers can be divided into the following categories:
Surface active agent (surfactant): Surface active agents are one of the most common and widely used dispersion agents. They can reduce the surface tension between the liquid phase and the surface of the particles, so that the solid particles are scattered in the liquid and achieved stable and dispersed. Common surface active agents include anion surfactants, cationic surfactants, non -ion surfactants, and Zwitterionic surfactants.
Polymer dispersant: Polymer dispersant is to achieve granular dispersion and stability by introducing polymer polymers in the solution. These polymers usually have hydrophilicity and hydrocariasis groups, and interact with the surface of the particles to prevent the particles from re -gather. The polymer dispersant may be natural polymers (such as starch, collagen, etc.) or synthetic polymers (such as polyacryl acid, polyethylene pyrodidone, etc.).
Granular surface modifier: The particle surface modifier refers to decentralized stability by chemically modifying the surface of the particles. Common surface modifiers include Silicine coupling agents, carboxylic acids, amine compounds, etc., which can form chemical bonds or interactions with the surface of the particles to prevent particles from gathering.
Collagen stabilizer: colloidal stabilizer is decentralized by forming colloidal particles. The colloidal stabilizer may include collagen solution, colloidal gel, and colloidal particles, which have high decentralized stability.
This is only some common categories of decentrals. Different types of decentrals have different scope and characteristics. In practical applications, choosing a suitable dispersant need to consider the characteristics of particles and solutions, the decentralized effects required, and the requirements of the final product.