The development history of defoaming agents The German physicist Quincke first proposed chemical defoaming methods in the 19th century. For example, ether vapor can eliminate soap bubbles. So far, the defoaming agent has been updated four times. The first-generation defoaming agents are mainly represented by mineral oils, alcohols, amides, fatty acids and their derivatives. Currently,…
Dosage of defoaming agent There are many types of defoaming agents, and different types of defoaming agents require different amounts. Below we will introduce to you the amounts of six types of defoaming agents: 1. Alcohol defoamer: When using alcohol defoamer, the dosage is generally within 0.01-0.10%. 2. Grease defoamer: The addition amount…
Factors affecting the effectiveness of defoaming agents Dispersion of defoaming agent in solution The dispersion state and surface properties of the defoaming agent in the solution significantly affect other defoaming properties. Defoaming agents should have a suitable degree of dispersion and particles that are too large or too small will affect their antifoaming activity. Compatibility…
Advantages and Disadvantages of Different Types of Defoaming Agents The research and application of organic defoaming agents such as mineral oils, amides, lower alcohols, fatty acids and fatty acid esters, and phosphate esters were earlier. They belong to the first generation of defoaming agents. They have the characteristics of easy availability of raw materials, high…
Choose a defoaming agent suitable for the formulation system There are many factors that affect bubbles and defoaming in coating formulations, so the selection of defoaming agents must be comprehensively considered. Surface Tension: The surface tension of the paint has a great influence on the defoaming agent. The surface tension of the defoaming agent must…
Formation and control measures of biofoam Biofoam is a foam formed due to the abnormal growth of microorganisms, mixed with bubbles and floc particles. It is stable, continuous and difficult to control. 1. Hazards of biofoam Biofoam has many impacts on the operation of sewage plants: 1. Biological foam is generally viscous. It will involve…
Three testing methods for defoaming ability of defoaming agents Different types of defoaming agents have different defoaming capabilities. Below we will introduce three testing methods for the defoaming capability of defoaming agents: 1. Reincarnation Law The falling height and flow rate of the circulating material are constant, and the height of the material in the…
How should defoaming agents be added to be effective? 1. Add before foaming This method can suppress the production of foam by adding a defoaming agent in advance to the system where foam may occur. For closed containers and devices, defoaming agents can effectively eliminate foam. 2. Continuous drip addition When the foaming liquid is…
