How do hyperdispersants for ceramic powders and ceramic pigments maintain their dispersion effect under high shear conditions?
Publish Time: 2025-02-24
Hyperdispersants for ceramic powders and ceramic pigments can maintain their dispersion effect under high shear conditions, mainly due to their unique molecular structure and design, as well as their adaptability in high shear environments.1. Molecular structure design of hyperdispersants for ceramic powders and ceramic pigmentsRole of anchoring groups: Hyperdispersants for ceramic powders and ceramic pigments use anchoring groups to replace the hydrophilic groups in traditional dispersants.These anchoring groups can be firmly adsorbed on the surface of solid particles through chemical bonds and van der Waals forces to form single or multiple anchor points, effectively preventing the desorption of hyperdispersants for ceramic powders and ceramic pigments.Design of solvation chain: The length of the solvation chain (or solvation polymer chain) is an important factor affecting the dispersibility of hyperdispersants for ceramic powders and ceramic pigments.Appropriate solvation chain length can ensure a balance between steric hindrance and solvent affinity, thereby maintaining the dispersion effect under high shear conditions.Structure of block copolymers and comb copolymers:The structure of hyperdispersants for ceramic powders and ceramic pigments is often designed as a block copolymer with the anchoring group in the middle of the polymer, or a comb copolymer with the anchoring group as the back and the solvated chain as the teeth.Such a design ensures that the anchoring group will not be adsorbed on different particles, while allowing the solvated chain segment to fully extend, thereby significantly improving the steric hindrance effect.2. Adaptability under high shear conditionsFast wetting and dispersion: hyperdispersants for ceramic powders and ceramic pigments can quickly wet the particles and shorten the grinding time to reach the qualified particle fineness.Under high shear conditions, hyperdispersants for ceramic powders and ceramic pigments can more effectively disperse the particles and prevent the agglomeration and reflocculation of the particles.Spatial stabilization: The solvated chain of hyperdispersants for ceramic powders and ceramic pigments is longer than the lipophilic group of traditional dispersants, and can form an effective spatial stabilization layer around the particles. In a high shear environment, this spatial stabilization layer can prevent particles from colliding and agglomerating due to shear forces.Dynamic stability: The extremely weak capsules formed by hyperdispersants for ceramic powders and ceramic pigments are easy to move and can quickly move to the surface of the particles to play a wetting and protective role.Under high shear conditions, this dynamic stability helps to maintain the dispersion state of the particles and prevent particle agglomeration and precipitation.3. Considerations in practical applicationsParticle size distribution and surface characteristics: When selecting hyperdispersants for ceramic powders and ceramic pigments, it is necessary to consider the particle size distribution and surface characteristics of the particles to be dispersed. Different particles may require different types of hyperdispersants for ceramic powders and ceramic pigments to achieve the best dispersion effect.Characteristics of the dispersion medium: The polarity, viscosity and other characteristics of the dispersion medium will also affect the dispersion effect of hyperdispersants for ceramic powders and ceramic pigments. Therefore, when selecting hyperdispersants for ceramic powders and ceramic pigments, it is also necessary to consider the characteristics of the dispersion medium.Addition amount and mix ratio: The addition amount and mix ratio of hyperdispersants for ceramic powders and ceramic pigments are also important factors affecting the dispersion effect. Too much or too little addition may lead to poor dispersion effect. Therefore, it is necessary to determine the optimal addition amount and mix ratio through experiments.In summary, hyperdispersants for ceramic powders and ceramic pigments can maintain the dispersion effect under high shear conditions, mainly due to their unique molecular structure design and adaptability in high shear environments. By rationally selecting and using hyperdispersants for ceramic powders and ceramic pigments, it is possible to ensure that the particles remain well dispersed under high shear conditions, thereby meeting various application requirements.
