Application fields of silicone defoamer
Silicone defoamer is a white, viscous emulsion. It has been used in various industrial fields since the 1960s, but its large-scale and comprehensive rapid development began in the 1980s. As a silicone defoaming agent, its application fields are also very wide, and it has attracted more and more attention from all walks of life. In chemical, papermaking, coating, food, textile, pharmaceutical and other industrial sectors, silicone defoamer is an indispensable additive in the production process. It can not only remove foam on the liquid surface of the process medium during the production process, thereby improving filtration, The separation, gasification, liquid drainage and other effects of washing, extraction, distillation, evaporation, dehydration, drying and other processes ensure the capacity of various materials holding and processing containers.
1. Principle of bubble generation:
When we are producing, when the liquid is stirred or mixed with gas, a lot of bubbles will be generated inside the surface area of the liquid. Some bubbles dissipate easily, and some bubbles are very difficult. Not only do they not dissipate, but they also gather. The more, the more bubbles form. Or there are media that cause foaming such as surfactants.
2. Introduction to silicone defoamer:
The series of silicone defoaming agents are silicon ether synthetic defoaming agents. It is suitable for defoaming at temperatures between 25°C and 135°C. However, when the temperature of the defoamed system is between 80°C and 110°C, many silicone defoaming agents have broken emulsions, drifted oil, and lost the physical properties that defoaming agents should have. Not only will the defoaming power decrease or disappear, but it will also leave unexpected disadvantages in the subsequent processes of the defoamed product. This series of defoaming agents can maintain a good physical state at this temperature. It does not break emulsification, does not float oil, and has stronger defoaming than normal temperature.
3. Characteristics of silicone defoamer:
1. Silicone defoaming agent has strong defoaming and foam-suppressing power with a small dosage and does not affect the basic properties of the foaming system.
2. Silicone defoamer is particularly effective in eliminating foam caused by anionic surfactants and viscous liquid systems, and has good alkali resistance.
3. Organic silicone defoamer. Silicone has high temperature resistance, low temperature resistance, stable physical properties, chemical inertness, and very low surface tension. It is a commonly used defoaming agent.
4. Application of silicone defoamer:
1. Suitable for use as defoaming suppressor in water systems with various active agents. Especially suitable for eliminating foam in anionic surfactant systems and liquids with higher viscosity. It has unique effects on all types of cleaning agents under strong alkali conditions.
2. Eliminate foam in industrial systems, such as defoaming in sewage treatment, printing and dyeing, detergents, drawing fluids, synthetic cutting fluids, emulsion polymerization, textile printing and dyeing, and chemical production processes.
Silicone defoaming agents are widely used in various industrial fields due to their excellent defoaming performance and adaptability. Here are some common silicone defoamer applications:
Chemical process: Silicone defoamer is widely used in chemical process to control the generation and diffusion of bubbles and foam. They can be used in polymer synthesis, chemical reactions, solvent extraction, fermentation processes, etc. to improve process efficiency and product quality.
Coatings and Inks: Silicone defoamers are widely used in the coating and ink manufacturing process to prevent bubbles and defects on the coating surface. They help improve wetting and leveling of coatings and inks, resulting in more even and smooth coatings
Food processing: Silicone defoamers are used as foam control agents in food processing. They can be used to reduce foam formation during food processing, such as brewing, fermentation, confectionery manufacturing, etc., to improve production efficiency and product quality.
Plastics and Rubber: Silicone defoamers are widely used in plastic and rubber processing to control the formation of bubbles and foam. They can be used in injection molding, extrusion, foaming and other processes to improve the appearance and physical properties of products.
Cleaners and Detergents: Silicone antifoam agents are used in cleaners and detergents to control foam generation and stability. They can be used in household cleaners, laundry detergents, detergents and other products to provide good cleaning results and foam control.
Building materials: Silicone defoaming agents are increasingly used in building materials. They can be used in concrete, mortar, foam concrete and other materials to improve the material’s process properties and reduce the formation of air bubbles and voids.
This is only part of the application field of silicone defoaming agents. With the development and innovation of technology, the application of silicone defoaming agents will continue to expand and deepen.
