How many types of surfactants are there? There are natural surfactants and synthetic surfactants according to raw materials. According to the ionic form, they can be divided into anionic, cationic, nonionic and amphoteric, and the most applied are nonionic surfactants. By application, they can be divided into general surfactants and special surfactants.

Non-foaming surfactants achieve rapid defoaming in the following ways to complete.

A. Adding silicone to medium and high foam surfactants to destroy the foam to achieve the purpose of no foam

Advantages: fast defoaming

Disadvantage: the washability and post-treatment of silicones are troublesome, and the addition of excessive silicone defoamer damages the original surface activity, causing the emulsification of surfactants to drop sharply and losing the washing effect! The last point is that the foam is easily and repeatedly unstable!

B. Medium foam surfactant by adding solvents (such as: tributyl phosphate, anhydrous ethanol, anti-white water) to achieve rapid defoaming!

Advantages: fast defoaming, emulsification and dissolution of oil is also good, there is also a certain market.

Disadvantages: foam height is easy to rebound; solvent overuse will affect environmental emissions, solvent is flammable and explosive products need to be used with caution and reporting.

C. Self-defoaming non-foaming surfactants without adding defoamer (for example: C-201 AL-602 TPE)

Advantages.

1. The foam breaks in 0.01 seconds, effectively decontaminating and emulsifying at the same time.

2. Since the main component is alcohol, it is an environmentally friendly component, reducing environmental emission concerns.

3、The chemical oxygen demand COD content is zero, theoretically it can be directly discharged.

Disadvantages: emulsification power is not as good as the traditional NP-10 emulsifier, the price is in the upper middle, but compared with the traditional defoamer-type non-foaming surfactant consumption has been reduced, the overall cost is low.