Silicone defoamer, known as the industry's "defoamer". It is composed of organosilicon compounds and surfactants, the main component is siloxane monomer and other auxiliaries, through polymerization reaction and modification process. This defoamer usually appears as a white viscous emulsion with excellent defoaming properties.


Since the 1960s, it has emerged in various industrial fields. Its real large-scale and comprehensive development was after the 1980s. As an important member of the defoamer family, silicone defoamer has gradually become an indispensable part of modern industrial production with its unique properties and wide application fields.


The defoamer principle of organosilicon defoamer


Bubbles can be found everywhere in our lives, but when a large number of bubbles gather and are continuously distributed in a liquid, a foam is formed. The existence of foam will not only affect the normal progress of work, but also cause certain pollution to the environment. Therefore, the elimination of bubbles is a very necessary work.



The core action principle of organosilicon defoamer lies in the siloxy group in its molecular structure. When the silicone defoamer is introduced into the system containing foam, these silicone oxygen groups can rapidly react with the silicon hydroxyl group in the foam, making the foam structure become unstable and effectively eliminate the foam. Specifically, its defoaming principle can be summarized as follows:


1, reduce surface tension:


The surfactant molecules in the silicone defoamer adsorb to the surface of the bubbles in the liquid, significantly reducing the surface tension of the liquid and making it easier for the bubbles to be released from the liquid.


2, the formation of molecular film:


Silicone defoamer molecules can form a very thin molecular film with strong adsorption ability on the liquid surface. When bubbles come into contact with this molecular film, they break and dissipate under the action of surface tension.


3, inhibit gas diffusion and foam generation:


The oleophilic group in the silicone defoamer will adsorb on the surface of the bubble, forming a stable film, preventing the gas from further dissolving and gathering into new bubbles, so as to achieve double inhibition of the formation of bubbles.


Application field of silicone defoamer


Silicone defoamer is widely used in various industrial fields due to its advantages of efficient defoamer, good stability, easy use and wide application range, including but not limited to:


1. Chemical industry:


It is used to remove foam produced by various chemical reactions, such as polymerization, distillation, extraction, etc.


2. Pharmaceutical Industry:


Used for defoaming liquid medicine and ointment, etc., to improve the stability and safety of products.


3. Food industry:


Used to soak all kinds of beverages, dairy products, etc., to ensure the quality and taste of food.


4. Textile industry:


It is used to remove foam dyes, auxiliaries, etc., to improve printing and dyeing effect and product quality.


5. Paper industry:


It is used to debubble paper liquid and paste to improve the smoothness and gloss of paper.


6, paint and ink industry:


Used in water-based coatings and inks to prevent bubbles and improve stability and uniformity.


7. Water treatment:


It is used to eliminate bubbles in the water treatment process, improve the treatment efficiency and water quality stability




The role and importance of organosilicon defoamer


Silicone defoamer plays a vital role in industrial production. It can not only eliminate the foam in the production process, improve the separation, gasification, drainage and other effects of filtration, washing, extraction, distillation, evaporation, dehydration, drying and other processes, but also ensure the capacity of various materials, processing containers. In addition, the application of silicone defoamer has also improved production efficiency, product quality and process stability, and promoted the progress and development of related industries.



Special properties of silicone defoamer


Silicone defoamer has a variety of special properties that make it more advantageous in industrial production:


1, insoluble:


Because of its special chemical structure, organosilicon can be used in water-based and oil-based systems, with strong bubble suppression ability and remarkable bubble breaking effect.


2, low surface tension:


Silicone defoamer can quickly eliminate foam and inhibit foam formation.


3, good thermal stability:


It can withstand high temperature for a long time, and the defoaming effect is still very good under the condition of neutral system and temperature up to 150℃, and it can withstand high temperature above 300℃ in a short time.


4, high chemical stability:


It has physiological inertia and can be used in the defoaming industry such as drug production, food fermentation and personal protection products, with no adverse side effects on the human body. Pure silicone oil can not be used as a defoamer, when the silicone oil is emulsified to form silicone defoamer, it can quickly spread on the surface of the solution, and the use of less amount can achieve a good defoamer effect.


5, environmental protection:


It will not pollute the system and affect the product processing performance, and the amount of addition is small, which can effectively reduce the cost.