Product finderView our range of dispersants
How are particle dispersions stabilised?
- Prevent coagulation through inter-particle repulsion (colloidal stability)
- Slow down sedimentation by increasing viscosity of continuous phase (kinetic stability)
- Make it solid by creating a network structure (thermodynamic stability).
The main method by which our products work is through method a) – colloidal stability, but we also have products that work by adjusting kinetic and thermodynamic stability. If you need a dispersant for a particular application not listed here, please contact us.
To maintain stability through Brownian motion, we must prevent particles sticking together when they collide.
- This can be achieved by increasing the charge associated with the particle (i.e. Zeta potential).
- Zeta potential is a physical property which is exhibited by any particle in suspension.
- It can be used to optimise the formulations of suspensions and emulsions.
- The understanding of the zeta potential of a system enables a chemist to produce better and more stable formulations.
- There is an energy barrier resulting from combination of the attractive and repulsive forces prevents particles approaching each other closely.
- So long as the kinetic energy of a particle does not exceed this barrier, coagulation should not occur.
Figure 1: The energy of a system must exceed the energy barrier for agglomeration to occur. The energy barrier can be greater if Zeta potential between particles is maximised.
The diverse range of particle types and sizes that need dispersing means that in order for us to make appropriate recommendations it is important to understand what is required in order to create a good dispersion.
The right solution will depend on many factors such as:
- Particle size / shape
- Particle density
- Surface charge of particle
- The solvent the particle is to be dispersed in
- Desired solids loading of dispersion
- The pH of the system (if aqueous)
- What kind of doping is present (often the case in certain applications).
Application areas for our dispersants
Dispersants for lithium-ion batteries
Dispersants for catalyst washcoats
Asphaltene dispersants for the oil and petroleum industry
Dispersants for lithium-ion batteriesEffective carbon black dispersant for cathode slurries
Optimise processing slurry viscosity and increase conductive carbon distribution to improve capacity retention and electrochemical stability.Read more
Emission control catalyst additivesUnique and bespoke dispersant and rheology modifier additives for catalyst washcoat
Optimise catalyst washcoat rheology and overcome technical challenges, decrease processing time and reduce precious metals utilisation.Read more
Additives for oil productionHigh-performing demulsifier chemistries
Ensure maximised well output and meet global regulatory and environmental challenges in demanding oilfield conditions.Read more
FlowSolve™A brand of asphaltene dispersants and wax inhibitors
FlowSolve™, additives for asphaltene dispersion and wax inhibition to improve and maximise performance in oilfield and marine fuel applications.Read more