Classification of Wetting & Dispersing Agents and Their Functions

Classification and Mechanism of Wetting & Dispersing Agents – Jihua Net

Jihua Net offers a comprehensive range of dispersants, which can be categorized into five common types:

1. Anionic (low-cost)

2. Cationic

3. Zwitterionic (electrically neutral)

4. Multifunctional

5. Nonionic (may desorb/migrate in paint films)

Core Functions of Dispersants

1. Surface Adsorption & Wetting Promotion

   • Adsorbs onto solid particle surfaces to facilitate wetting of agglomerates.

2. Polymeric Steric Stabilization

   • Forms protective adsorption layers on particles via high-molecular-weight polymers, enhancing:
     ✓ Surface charge density
     ✓ Steric repulsion between particles

3. Bilayer Structure & Electrostatic Stabilization

   • Constructs a dual-layer molecular arrangement:

     • Outer layer: Polar groups bind with water (improving wettability)

     • Inner layer: Generates electrostatic repulsion to prevent particle recombination

4. System Homogenization

   • Ensures uniform suspension stability by:
     ✓ Preventing sedimentation
     ✓ Maintaining consistent physicochemical properties

Conclusion: Dispersants enable thermodynamically stable solid-liquid dispersion systems.