Use of water treatment defoamer
Water treatment polysiloxane defoamer – polysiloxane defoamer is usually composed of two main components, polydimethylsiloxane and silicon dioxide, which are properly matched. The defoamer based on polydimethylsiloxane is an ideal defoamer in the defoaming system because it is insoluble in water and difficult to emulsify. Polydimethylsiloxane has lower surface properties than carbon chain hydrocarbons, so it has lower surface tension than the surfactants commonly used in the textile industry. The foaming performance of pure polydimethylsiloxane is poor and slow, and the defoaming effect needs to be enhanced by silicon dioxide particles. The silicon dioxide particles are brought to the air-water interface of the foam by silicone oil and enter the bubble liquid film. Due to its hydrophobicity, the contact with the surfactant foaming droplets forces the foaming liquid to be discharged from the surface of the solid hydrophobic particles, causing the local rapid drainage of the foam and causing it to rupture. In this way, due to the synergistic effect, the two components produce a good defoaming effect. Polysiloxane defoamers have been widely used in many fields due to their excellent defoaming performance and other advantages, especially in textile dyeing and finishing, where they have developed rapidly. Studies have found that silicone glycol defoamers based on copolymers of polydimethylsiloxane and polyethylene have ideal defoaming effects in jet dyeing and other textile processing due to their special solubility.
Defoamer: As the name suggests, it is an auxiliary agent for eliminating foam. It eliminates foam, which is harmful to daily production and life. In the industrial production process, as long as stirring is involved, there will be foam problems, such as pulping and papermaking, textile printing and dyeing, coating processing, sewage treatment, biological fermentation, oil extraction and refining, construction industry, adhesives, etc. Foams in these industrial processes may cause many problems, such as reduced production capacity, waste of raw materials, extended reaction cycle, reduced product quality, etc. It can be seen that the control and elimination of harmful foams have great technical and economic significance.
