Polyethylenimine Cationic Ceramic Dispersant
CAS Number: 9002-98-6
Polyethylenimine (PEI) is a branched cationic polymer used as a dispersant for negatively charged ceramic powders such as SiC, Si3N4, and carbon-based materials at acidic to neutral pH. PEI adsorbs strongly through electrostatic interaction, providing steric and electrostatic stabilization. It is widely used in aqueous processing of non-oxide ceramics and as a flocculation reversal agent.
Technical Specifications
| appearance | Colorless to light yellow viscous liquid or solid |
| purity (%) | ≥99 |
| pH (50% aq) | 10–12 |
| nitrogen content (%) | 32–33 |
| molecular weight (g/mol) | 600–70000 (various grades) |
Applications
- Dispersant for SiC and Si3N4 aqueous slips
- Cationic dispersant for carbon nanotube ceramic composites
- Dispersant for boron carbide (B4C) slurries
- Surface modifier for ceramic powder in polymer composites
- Binder and film-forming agent in ceramic green tape
Key Features
- Cationic charge ideal for non-oxide ceramics with negative surface potential
- Branched structure provides excellent steric stabilization
- Effective across a wide range of molecular weights and charge densities
- Compatible with organic solvents for non-aqueous ceramic processing
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CAS Number
9002-98-6
Category
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