悬浮剂和乳化剂的差异

Thekey differencebetween suspending agent and emulsifying agent is thatsuspending agents are useful for the stabilization of悬架，而乳化剂可用于稳定emulsions。

Suspensions and emulsions are two different substance. An emulsion is usually a mixture of two liquids, while a suspension can be a mixture of two components from any phase (gas, liquid or solid). However, both are mixtures of two components.

内容

1.Overview and Key Difference
2.What is a Suspending Agent
3.什么是乳化剂
4.Side by Side Comparison – Suspending Agent vs Emulsifying Agent in Tabular Form
5.概括

什么是暂停代理？

Suspending agents are chemical substances useful in stabilizing a suspension. These are also known as thickening agents. These are usually hydrophilic colloids that spontaneously form colloidal dispersions with water. This happens due to an affinity between the dispersed particles and the dispersion medium. These chemical agents are helpful in lowering the sedimentation rate of the particles in the suspension.

Generally, the sedimentation rate is slowed by suspending agents through increasing the viscosity of the liquid vehicle and by slowing down settling (according to the Stokes law). Moreover, suspending agents tend to prevent caking at the base of a suspension, and we can resuspend it by agitation.

有三种主要类型的悬浮剂，包括多糖，无机盐和合成化合物。我们可以用作悬浮剂的最常见多糖包括天然多糖，例如相思，淀粉，藻酸盐等。我们可以用作悬浮剂的无机盐的一些例子包括粘土，bentonite, and aluminum hydroxide. Synthetic compounds are also made as suspending agents in order to overcome the various problems occurring from natural products. e.g. carbomers and colloidal silicon dioxide.

什么是乳化剂?

An emulsifying agent is a chemical substance that allows us to stabilize an emulsion. In other words, it can prevent the separation of liquids that usually do not mix with each other. Moreover, emulsifying agents do so by increasing the kinetic stability of the mixture. We can call them emulsifiers as well, and a good example issurfactants。有两种类型的乳化剂作为亲脂性乳化剂和亲水性乳化剂。

Lipophilic emulsifiersare emulsifying agents that work with oil-based emulsions. These chemical reagents are important in removing a penetrant when a defect due to over-washing of the emulsion is a concern. Lipophilic emulsifiers can make the excess penetrant more removable with washing using water. Usually, lipophilic emulsifiers are oil-based materialism, and these reagents are produced as ready-to-use agents by the manufacturer.

亲水性乳化剂are emulsifying agents that work with water-based emulsions. Similar to lipophilic emulsifiers, these chemical reagents also are important in removing a penetrant from a defect when over-washing of the emulsion is a concern. Here, lipophilic emulsifiers can make the excess penetrant more removable with washing using water. Usually, hydrophilic emulsifiers are water-based materials and are produced as a concentrate by the manufacturer. Therefore, we need to dilute the concentration of the hydrophilic emulsifier using water to a preferable concentration before using it.

What is the Difference Between Suspending Agent and Emulsifying Agent?

Suspensions and emulsions are two different mixtures. Therefore, suspending agents and emulsifying agents are also different from each other. The key difference between suspending agent and emulsifying agent is that suspending agents are useful for the stabilization of suspensions, whereas emulsifying agents are useful in stabilizing emulsions.

以下是悬浮剂和乳化剂以表格形式之间的差异的摘要。

摘要 - 暂停代理与乳化剂

悬浮液和乳液都是两个成分的混合物，但乳液实质上是由两种液体制成的，而悬浮液可以在任何阶段中均由材料制成。因此，我们应该为它们使用的稳定剂也不同。悬浮剂和乳化剂之间的关键区别在于，悬浮剂对于悬浮液的稳定有用，而乳化剂则可用于稳定乳液。

Reference:

1. Singh, Silvi. “Suspending Agents.”幻灯片, 19 May 2016,Available here。

Image Courtesy:

1. “Chemical precipitation diagram” By Vectorized by ZooFari; raster by ZabMilenko – Own work based on Chemical precipitation diagram.png (Public Domain) viaCommons Wikimedia
2. FVASCONCELLOS的“化学沉淀图” 14：24，2007年4月17日（UTC） - 自己的作品，图像：emulsions.png ike9898，公共领域）Commons Wikimedia