Differentians are chemicals widely used in the fields of pigmentation, coatings, inks, adhesives and other fields. Their main role is to uniformly scattered solid particles or liquid droplets in the liquid medium to prevent them from gathering and precipitating. The principle of the role of dispersant is as follows:
Surface activity: Differentians have certain surface activity, which can reduce the surface tension of particles or droplets, making it easier to disperse in liquid. They can form a layer of adsorption layer on the surface of the particles or liquid droplets, which hinders the mutual attraction between particles or droplets, thereby reducing the agglomeration and promoting dispersion.
Space exclusion: Disted agent molecules usually have a long chain structure or large space occupy the volume, so it occupies a large space in the liquid and interacts with the surface of particles or droplets. This space exclusion reduces the approaching and agglomeration trend between particles or droplets, which is conducive to maintaining its dispersal state.
Staff: Some dispersers can be removed in the liquid to produce charged ions. These charged ions can be adsorbed on the surface of particles or droplets to form a charge barrier to offset the electrostatic attraction between particles or droplets and prevent gathering and precipitation.
Disclosure: Molecular diffusion occurs between the dispersant molecules and particles or droplets, so that it has high dynamic energy. This diffusion effect can increase the collision frequency between particles or liquid droplets and promote the dispersion process.
Through the above -mentioned principles, the dispersant can effectively prevent the aggregation and precipitation of particles or liquid droplets, maintain their decentralized state, and improve the stability and performance of the liquid system. The characteristics of different types of particles or liquid droplets and liquid media need to choose suitable dispersers and their usage concentrations to achieve the best dispersion effect.