Choosing the appropriate defoamer is crucial for ensuring the smooth progress of the production process. In different application scenarios, the selection of defoamers needs to consider multiple factors, including defoaming efficiency, stability, compatibility, etc.

In the selection of defoamers, it is necessary to choose the appropriate type of defoamer based on the characteristics and requirements of the specific application field, such as organosilicon, polyether, mineral oil, etc. Evaluate the defoaming speed and foam suppression persistence of the defoamer to ensure that it can quickly and continuously exert its effect in the target system. Defoamers should have good compatibility with the treated liquid to avoid side effects such as affecting the transparency and viscosity of the system. Under extreme conditions such as high temperature, low temperature, acidity, etc., defoamers should be able to maintain stable performance. Considering the environmental indicators such as biodegradability and toxicity of defoamers, choose environmentally friendly and low residue products.

In terms of performance test method, a certain amount of defoamer can be added to the test solution containing foam, and the speed and extent of foam disappearance can be observed by shaking. Using a circulating pump to simulate dynamic conditions in actual production and evaluate the performance of defoamers in continuous operation. By measuring the change of foam volume with time, the defoaming ability and foam suppression effect of defoamer can be quantified. For micro level research, scanning electron microscope can be used to observe the distribution and action mechanism of defoamer on the surface of foam.

Proper selection and use of defoamer can not only solve the foam problem in production, but also improve the overall production efficiency and product quality. Understanding and following the above selection principles and performance testing methods is the key to ensuring the effectiveness of defoamers.