Wetting agent is another term that is used more frequently in industry, referring to a substance that can reduce the surface tension of solid particles in a solid-liquid type suspension.
Type Wetting agent
• Nonionics (zero charge).
• Anionic (negative charge).
• Cationic (positive charge).
• Amphoteric (negative and positive charge).
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| Surfactants and polymers | Cellulase performance |
|---|---|
| Nonionic surfactants | Generally compatible with all nonionic surfactants, especially ethoxylates. High foaming surfactants should be avoided or a defamer should be used. |
| Anionic surfactants | Noncompatible and they may cause the enzyme to denature, especially if used alone. The use in combination with a very low concentration of nonionic surfactant may be beneficial. Avoid high foaming surfactants. |
| Cationic surfactants (softeners) | May be compatible, however, surface coverage may prevent cellulase adsorption and hydrolysis. |
| Amphoteric surfactants | Compatible |
| Polymers | Generally compatible with most polymers used (polyethylene, polyvinylpyrrolidone). Note that some polymers will adsorb to cotton fabric and prevent cellulase action by surface coverage. |