How to test the performance of defoaming agents
Before using the defoamer, you must test it first, otherwise it will not achieve the ideal effect due to improper selection. So how to test the performance of the defoamer? The following defoamer manufacturers will introduce to you:
1. Shake bottle method: The simplest and most common method is the shake bottle test method. Add a certain amount of foaming liquid to the stoppered measuring cylinder. After shaking the bottle up and down the same number of times each time, let it stand and observe the foam height and defoaming time
2. Spray test: Spray the bubble solution to make bubbles, then add the defoamer to measure the defoaming effect based on the defoaming time
3. Circulation pump test: Put the bubble solution in a closed loop for circulation, add the defoamer for stirring, and measure the foam height. This method is to test the quantitative evaluation of the anti-foaming performance under the dynamic state of stirring, emulsification and shearing. When the solution circulates in the closed loop, the time required to reach a certain foam height is measured to evaluate the defoaming efficiency.
4. Density meter measurement: Use a density meter to measure the density of the foam-liquid mixture. The difference between the density value and the density of the foaming liquid before stirring represents the foaming amount. The greater the density difference, the higher the gas content in the foam-liquid mixture, and the greater the foaming force. The percentage of the density difference to the density of the foaming liquid before stirring represents the foaming rate; the foaming amount of the pulp after adding the defoamer is tested, and the difference between the foaming amount of the blank pulp is the foaming amount, and then compared with the foaming amount of the blank pulp to obtain the foaming rate of the defoamer.
The above is the method of testing the performance of the defoamer. I hope it will be helpful to everyone. If you still need to know related knowledge, you can consult us and we will have professionals to answer you.
