Understand Surfactants

Varför finns det tensider i schampo och duschkräm? Är det nödvändigt? Förstå vad tensider gör.

Water is not enough to wash away grease and dirt from your skin and hair. To achieve that, you need something that dissolves the grease. To get clean, most of us use some kind of soap, shower gel or shampoo. But what do they contain that dissolves the grease and how does it work? 

Why are there surfactants in schampoo and shower cream? Is it neccessary? Understand surfactants.
SLS (Sodium lauryl sulfate), one of the most common surfactants in shampoos and shower creams.

According to the classical principle "like dissolves like" you need fat to dissolve fat. Oils are therefore excellent when it comes to dissolve and remove make-up as well as dirt and grease on our skin and in our hair. The problem is that since oil is not soluble in water, it is difficult to rinse away the remnants afterwards. Especially for your hair, this is a huge dilemma. We want our newly washed hair to be silky-smooth, light and non-greasy. To resolve this problem, all skin- and hair-cleaning product such as shampoo, shower cream and soap, contain cleansing factors called surfactants. Surfactants are two-faced molecules. They have a head that loves water and a tail that loves fat. 

When you wash your hands with soap, the fat-loving tail dissolves the grease and dirt. All according to the principle "like dissolves like". When you then rinse with water, the water-loving heads all come together like a protective wall around the tails, who shies the contact with water. Together they form small balls, where the dissolved grease is trapped in the middle. These balls are then easily rinsed away with water and the hands are clean.

Why are there surfactants in shampoo and shower cream? Is it necessary? Understand how surfactants work.
Soap contains surfactants, which have a water-loving head and fat-loving tail.
Why are there surfactants in shampoo and shower cream? Is it necessary? Understand how surfactants work.
The surfactants fat-loving tails are drawn to dirt and grease on the skin.
Why are there surfactants in shampoo and shower cream? Is it necessary? Understand how surfactants work.
The surfactants tails dissolve the dirt and grease on the skin surface according to the principle "like dissolves like".
Why are there surfactants in shampoo and shower cream? Is it necessary? Understand how surfactants work.
When you rinse with water, the surfactant heads go together and form a protective wall around the tails. The dirt is trapped in the middle and rinsed away with the water.
Why are there surfactants in shampoo and shower cream? Is it necessary? Understand how surfactants work.
The skin is clean.

Read more about Soap and other Surfactants