What are the factors affecting the effectiveness of defoaming agents?
Defoamers are very important for many industries, but many companies will encounter the reasons why the defoamer effect becomes worse when using defoamers. The following editor will introduce the factors that affect the use of defoamers.
1. Dispersibility of defoamers in solution
The dispersion state and surface properties of defoamers in solution significantly affect other defoaming properties. Defoamers should have a suitable degree of dispersion and particles that are too large or too small will affect their defoaming activity.
2. Compatibility of defoamers in foam systems
When the surfactant is completely dissolved in the aqueous solution, it is usually oriented at the gas-liquid interface of the foam to stabilize the foam. When the surfactant is in an insoluble state or supersaturated state, the particles are dispersed in the solution and accumulate on the foam, and the foam acts as a defoamer.
3. Foaming system ambient temperature
The temperature of the foaming liquid will also affect the performance of the defoamer. When the temperature of the foaming liquid itself is relatively high, it is recommended that a special high-temperature resistant defoamer must be used, because if an ordinary defoamer is used, the defoaming effect will definitely be greatly reduced, and the defoamer will directly demulsify the emulsion.
4. Packaging, storage and transportation
This product is mainly packaged in 25 kg, 120 kg, 200 kg and ton boxes. The defoamer is suitable for storage at 5-35℃, and the shelf life is 6 months. Do not place it near a heat source or expose it to the sun. According to the commonly used chemical storage method, make sure it is sealed after use to avoid deterioration.
5. Defoamer addition ratio
The addition of the original liquid and the addition after dilution have some deviations to a certain extent, and the proportions are not equal. Due to the low concentration of surfactants, the diluted defoamer emulsion is extremely unstable and will not be stratified soon. The defoaming performance is relatively poor and is not suitable for long-term storage. It is recommended to use it immediately after dilution. Or add thickening water to ensure the stability of the diluent. The proportion of adding defoamer needs to be verified by the customer through field tests. This is not as good as possible. It should pay attention to appropriate benefits and should not be excessive.