Why can the foam toilet the foam be foam as soon as it is pressed?

In life, laundry fluids, shower gels, and ballad creams are all the items we need daily cleaning. They have different types, and some of them can produce rich foam with both hands, while others are non -foam types. People have their own preferences in choosing bubbles and non -bubbles. For the vast bubble party, rich and delicate foams are synonymous with "cleaning". But do you know that behind the little bubble, there are many scientific secrets hidden.

Source 丨 a shopping website

1

How is the foam produced?

In terms of definition, foam is a decentralized system formed by the insoluble gas scattered in liquid or melting solids. Bubbles are common in daily life. For example: shake the mineral water bottle, the water surface may appear slightly vertical foam; if you add some soapy water to this bottle, then you will find that compared to the "water foam" that was quickly burst before, it is equipped with soapy water. The foam produced in the bottle lasts longer and it is not easy to break. The same is true of many people's childhood fun "blowing bubbles".

Source 丨 Xinhuanet

The reason why these two bubbles are different in "life" is a different manifestation of the "drainage effect". We all know that because of the gravitational effect, the water will flow to the low point, so the water on the outer layer of the foam will also flow down naturally. However, because some substances in soapy water can fight the drainage effect, so that the bubble of soapy water can grow long. Time exists.

The mysterious substance that can fight the drainage effect in soapy water is the famous surfactant. It has a loud name -industrial MSG. It is rich in variety, with more than 10,000 types. It has its figure in pesticides, pesticides, and washing powder, soap, and shampoo, and it often needs it in the food industry. Therefore, some people once said, "If there is no surfactant, 90%of chemical workers will be unemployed."

In terms of composition, the surfactant molecule has a typical two -terminal structure: one end is a group of hydrophilic and oily group. The group, the group is insoluble in water and is easy to dissolve in oil. Such a two -terminal structure makes the surfactant clean. The hydrophilic base of the surface active agent is more interacted with water, which will form a hydrophilic layer, while the water -having aquatic base is excluded with water. Therefore, the molecules of surfactants will be arranged in the water.

Green is hydrophilic, yellow is a water -harassing base

Source ｜ Wikipedia Encyclopedia

The beauty of such arrangement is to weaken the gravity between water molecules and reduce the surface tension of water. In simple terms, this can make the clothes not only quickly and fully moist, while promoting the stain dispersal emulsification and falling off the surface of the clothes.

When the surface active agent is drained on the surface of the water, the surface tension of the water drops to the minimum, and the molecules of other surfactants enter the solution to form rubber beams. The beam is countless surfactant molecules arranged in an orderly manner. It is a spherical or stick -shaped gathering.

Surface active agent in the form of arrangement in water

Source ｜ Sohu

In the process of forming bubbles, the surfactant acts as a foaming agent and a foam agent. Add the foaming agent to the water solution, its hydrophilic base and water molecules are strongly attracted to each other, facing the water layer; and the water -having foundation is in the air or in the air bubbles. Surface Tension. The foaming agent is conducive to forming small bubbles with uniform distribution and moderate pores, and ensure that the bubbles rise to form a foam layer.

The adsorption diagram of the foaming agent in the qi-liquid interface

Source ｜ Baidu

What should I do if the bubble is easy to break? At this time, the foaming agent is needed. The foaming agent and the foam have a strong affinity, which can effectively adsorb on the surface of the foam, which effectively wrap the foam, so that the foam that has been formed has more stable, and reduce the merger and rupture of the bubbles. The use of the foaming agent also makes the distribution of bubbles evenly and small, and the height of the foam is higher.

Source ｜ PEXELS

2

How to produce more bubbles?

When we were young, we often used a tool with a closed circle. Its function was to spread the liquid on the space into a thin film, which is convenient for people to blow into the air into the film and stretch it. Relying on the tension on the surface of the liquid to make the stretching film spontaneously tightened and closed to form air bubbles. In contrast, in order to produce more bubbles when blowing bubbles and improve the efficiency of air and liquid mixing, people have adopted the most direct way to increase the number of circles. The more you close the circle, the more bubbles can be produced.

Source 丨 Xinhuanet

There are also bath flowers we use when bathing, sponges used to wash their faces, and their dense mesh or porous structures, which also plays the same role, which is conducive to the full mix of liquid and air, thereby forming delicate foam. The same is true of the foam bottle. It can quickly mix the air and liquid. If we open the hand -pressed pump head of the bottle, we will find that the secret is also a mesh structure -sieve.

In recent years, the utilization of the foam pump head is very high, and the pumping room at the throat is the key to producing foam. When the first press was released, low pressure was formed in the upper part of the pump head, and the air entered the air chamber, and the liquid was also taken to the upper part of the pump head. When pressing the second time, the air pressure increased, and the liquid and the air entered the sieve net on the pipeline, which would blow out the bubbles. The smaller the sieve, the smaller the bubbles blowing, the more delicate the foam.

Source ｜ A shopping website

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