Still don't know how to choose defoamer? Here's the point!
From the current development of defoamers, although the speed is relatively fast, but there is still no one defoamer can be applied to all foam systems. Therefore, the key to defoaming is to understand your foam situation and choose a good water based defoamer.
Emulsion defoamers are usually unstable in high temperature environments. If an unstable defoamer is added to the foaming solution, it may not produce an antifoaming effect and may even have some effect on the product.
Generally speaking, the defoaming/antifoaming effect of aqueous defoamer is directly proportional to the dosage, but it is not advisable to overdo it, because when the aqueous defoamer reaches the saturated concentration, the excess aqueous defoamer won't produce the defoaming effect, and it will also result in some waste. Therefore, the proper dosage is the key to using water based defoamer.
Antifoam agent with the following principles:
1. Reduction of the local surface tension of the foam, leading to the rupture of the foam
2. Destroy the elasticity of the membrane, leading to bubble rupture
3. Promote liquid film drainage
4. Addition of hydrophobic solid particles leads to bubble collapse
5. Electrolyte collapse of surfactant bilayer
Any defoamer will weaken its defoaming ability over time, and water-based defoamers are no exception. For good water-based defoamers, the weakening time will be slower, while for less effective water-based defoamers, the weakening time will be faster. Therefore, when evaluating the quality of water-based defoamer, it is necessary to consider its defoaming and anti-foaming performance.
Many people carefully consider and compare the price and performance of various water-based defoamers when purchasing them. Here, it is important to remind you that different water-based defoamer manufacturers have their own data indicators, and each type of defoamer is different. It cannot be used as a standard to judge the quality of water based defoamer.
Firstly, it is necessary to identify the system that requires the use of an antifoam, either water-based or oil-based. In the fermentation industry, oil-based defoamers such as polyether-modified silicones or polyether-based defoamers should be used. Water-based defoamers and silicone defoamers are needed in the water-based coatings industry. By selecting the defoamer, comparing the additive amount and referring to the price, a suitable and economical defoamer product can be obtained.
RISE Chemical provides the most perfect foam control solution for you.
