How to prepare the bubble liquid that children play with?

Prepare cups, tea bags, sugar, boiled water and detergent. After making tea, pour in sugar and detergent.

The components of foam liquid are coconut oil, sodium hydroxide, polyvinyl alcohol, etc. 1. Coconut oil: The fat obtained from coconut pulp is glyceride of lauric acid, myristic acid and palmitic acid, which is used in soap, food and other manufacturing industries. 2. Sodium hydroxide: commonly known as caustic soda, strongly alkaline, soluble in alcohol and glycerol, insoluble in acetone. 3. Polyvinyl alcohol: a widely used polymer chemical raw material. Widely used in coatings, adhesives and so on. Bubble water is a liquid made of coconut oil, caustic soda, polyvinyl alcohol, glycerol and spices, which can be blown into round bubbles. Bubble water is one of the important toys for children. The alkaline components in the bubble water solution will corrode children's skin. When buying bubble water, pay special attention to the safety of bubble water solution.

Bubbles are formed by the surface tension of water. This pulling force is the mutual pulling force perpendicular to the contact surface of two adjacent parts when the object is pulled. The mutual attraction between water molecules on the water surface is stronger than that between water molecules and air. These water molecules seem to stick together. However, if water molecules stick together excessively, bubbles will not form easily. Soap "breaks" the surface tension of water, which reduces the surface tension to only normal 1/3, which is the best tension needed for blowing bubbles.