Difference Between Antifoam and Defoamer

Thekey differencebetween antifoam and defoamer is thatantifoam agents can prevent foam from forming, whereas defoamers can control the amount of existing foam.

Antifoam and defoamer are two ant-foaming agents that have different application depending on their mode of action and timing. There are many different types of antifoaming agents, such assilicone化合物，酒精化合物，有机化合物等。

内容

1.Overview and Key Difference
2.What is an Antifoam
3.什么是申辩者
4.Side by Side Comparison –Antifoam vs Defoamer in Tabular Form
5.概括

What is an Antifoam?

Antifoam is a chemical additive that can prevent the formation of foam. Generally, manufacturers use antifoam agents in their formulas if they anticipate the tendency for the formation of foam during its use. Antifoams are generally slightly soluble in foaming solutions, and they can cause a decrease in表面张力.

The most commonly used antifoams include silicone compounds and high boiling alcohols, including oleyl alcohol and octylphenoxyethanol. Typically, these compounds are added batch-wise when required. The batch dosage can range from 5 to 20 ppm. Moreover, these additives play an important role in increasing the washing effectiveness. This occurs by entrapping air from forming in the system that can allow easier and unrestricted flow of filtrate through the screens and washers.

什么是申辩者？

DeFoamer是一种反燃料剂，可以控制在不同行业有用的液体中现有的泡沫。解散者可以消除液体中的任何现有泡沫，但不能阻止形成新的泡沫。解散者最常见的例子包括不溶的油，聚二甲基硅氧烷and some other silicone compounds, alcohols, stearates and glycols. We can name a defoamer as a chemical additive. This chemical additive is applied when we need to break a foam already formed.

Generally, these compounds are insoluble in the foaming medium and have surface-active properties. As a specific feature of defoamers, we can identify their low viscosity and the ability to spread rapidly on foamy surfaces. Moreover, defoamers have an affinity for air-liquid surface. They destabilize the foam lamellas. This destabilization causes the rupture of the air bubbles, and it can cause the breakdown of surface foam.

There are different types of defoamers, such as oil-based defoamers, powder defoamers, water-based defoamers, silicone-based defoamers, alkyl polyacrylates, and EO/PO based defoamers. Among them, oil-based defoamers are the most common additive type.

What is the Difference Between Antifoam and Defoamer?

抗试剂和散烟剂是我们可以用作行业中化学添加剂的抗燃料剂。防foam和Defoamer之间的关键区别在于，抗ifoam剂可以防止泡沫形成，而defoamers可以控制现有的泡沫的量。因此，抗试剂减少了泡沫的形成，而解散者则减少了现有的泡沫。此外，有机硅化合物和高沸腾的醇在内，包括油醇和辛基氧基乙醇是抗摄影剂的例子，而油性散制剂，粉末散热器，水性散热器，基于硅胶基于硅胶，烷基聚丙烯酸酯和EO/PO基于EO/PO基于EO/PO基于EO/PO）。

The following infographic summarizes the difference between antifoam and defoamer in tabular form.

概括– Antifoam vs Defoamer

抗试剂和散烟剂是我们可以用作行业中化学添加剂的抗燃料剂。防foam和Defoamer之间的关键区别在于，抗ifoam剂可以防止泡沫形成，而defoamers可以控制现有的泡沫的量。

Reference:

1. “Antifoams.”Overview | ScienceDirect Topics,Available here.
2. “Defoamer.” Wikipedia, Wikimedia Foundation, 27 Jan. 2021,Available here.

Image Courtesy:

1. “PmdsStructure” By Smokefoot – Own work (Public Domain) viaCommons Wikimedia
1. “Antifoam” By Langbein Rise (talk) – I created this work entirely by myself. (Public Domain) viaCommons Wikimedia