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What are defoamers used for in everyday life?
Release Date:
2021-03-04
A defoamer is a substance that reduces the surface tension of water, solutions, suspensions, and other systems, thereby preventing foam formation or diminishing and eliminating existing foam. It is widely used in industries such as textile dyeing, coatings, detergents, food processing, and papermaking. However, different defoamers vary in their mechanisms of action and applications. Today, we will explore how the uses of various defoamers differ.
Defoamer It is a substance that can reduce the surface tension of water, solutions, suspensions, and other media, prevent foam formation, or diminish or eliminate existing foam. It is widely used in industries such as textile dyeing, coatings, detergents, food processing, and papermaking. However, different defoamers vary in their mechanisms of action and applications. Today, we will explore how the uses of various defoamers differ.
Defoamers are broadly classified into three main categories: polyether-based, mineral oil–based, and silicone-based, each with its own unique advantages. Next, let’s examine the specific applications of each type:
1. Polyether-based defoamers
Polyether-based defoamers are characterized by low toxicity, high surface activity, a broad pH tolerance, low surface tension, rapid spreading, poor water solubility, and good solubility in organic solvents. They can be used alone or formulated into emulsions.
Main applications include:
(1) Fermentation for the production of antibiotics;
(2) Food processing;
(3) Paper industry;
(4) Detergent;
(5) Chemical industry;
(6) In industries such as the building materials sector.
2. Mineral oil-based defoamers
Mineral oil defoamers are characterized by rapid defoaming, high efficiency, long-lasting performance, and excellent cost-effectiveness.
Main applications include:
(1) Printing ink;
(2) Water-based coatings;
(3) Papermaking pulp washing;
(4) Architectural coatings;
(5) Waterborne epoxy resin;
(6) In industries such as emulsion polymerization.
3. Silicone-based defoamers
Silicone-based defoamers are characterized by low surface tension, high surface activity, excellent heat resistance, chemical stability, strong defoaming performance, reduced dosage requirements, low cost, non-toxicity, and non-flammability and non-explosivity.
Mainly used for:
(1) Industrial water treatment;
(2) Water-based coatings and other aqueous-phase foams;
(3) Textile sizing agents, high-temperature dyeing;
(4) Defoaming of drilling mud in oil extraction;
(5) Other industries that require long foam‑inhibiting times and rapid defoaming.
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