Things to note when choosing a defoaming agent
We all know that the main functions of defoaming agents are to defoam, suppress foam and break foam. When choosing, it is generally necessary to compare the amount of addition and reference price, and finally select a defoaming agent that meets the requirements. Specifically consider the following aspects:
1. Insoluble or insoluble foaming liquid. The defoaming agent is in a supersaturated state in the foaming liquid. Only insoluble or insoluble agents can easily reach the supersaturated state. Only when it is insoluble or difficult to dissolve can it easily gather at the air-liquid interface, be easily concentrated on the bubble membrane, and can it function at a lower concentration.
2. The surface tension is lower than that of the foaming liquid. Since the force between defoaming agent molecules is small and the surface tension is lower than that of the foaming liquid, the defoaming agent particles can immerse and expand on the bubble film.
3. Interaction with foaming liquid. The defoaming agent can be quickly dispersed in the foaming liquid so that it can quickly play a role in a wider range of the foaming liquid. In order to make the defoaming agent diffuse quickly, the active ingredient of the defoaming agent must have a certain degree of affinity with the foaming liquid, so that the interaction is strong and the “1+1>2” effect can be achieved.
The above are the important details that need to be paid attention to when choosing a defoamer, especially a good quality defoamer. Through actual observation and comparison, we can achieve the best choice of the most suitable and economical defoamer product!
