There are many types of green and environmentally friendly defoamers, which can be divided into natural oil type, plant extract type, biodegradable polymer type, etc. according to their chemical structure and application scenarios.

1、 Natural oil-based defoamers are mainly derived from vegetable oils, animal oils, or microbial oils, such as soybean oil, rapeseed oil, palm oil, etc. They have good biodegradability and renewability, and are environmentally friendly. At the same time, such defoamers usually have low surface tension, which can effectively inhibit and eliminate foam.

2、 Plant extract defoamer, plant extract defoamer uses natural active ingredients in plants, such as polysaccharides, proteins, phenols, etc., to inhibit and eliminate foam. This type of defoamer not only has excellent defoaming performance, but also has additional functions such as antibacterial and antioxidant properties, making it suitable for application scenarios that have strict requirements for product quality.

3、 Biodegradable polymer defoamers use biodegradable polymers as raw materials, such as polylactic acid (PLA), polyhydroxyalkanoates (PHA), etc. This type of defoamer has similar performance to traditional polymer defoamers, but can quickly decompose in natural environments, reducing long-term pollution to the environment.