I. Basic nature
 
Physical state: Depending on the relative molecular mass, the appearance of polydimethylsiloxane can range from colorless, transparent, volatile liquid to highly viscous liquid or silica gel.
Chemical properties: Polydimethylsiloxane has good chemical stability, electrical insulation, weather resistance, hydrophobicity, and shear resistance. It can be used for long periods of time at temperatures ranging from -50°C to 200°C, and is non-toxic, tasteless, and physiologically inert.
 
II. The role in shampoo
 
Lubrication and smoothness: Polydimethylsiloxane can impart a lubricating and smooth feeling to hair, making it easier to comb and reducing tangling and frizziness.
Glossiness improvement: This ingredient can increase the glossiness of hair, making it look healthier and brighter.
Foam suppression and defoaming: During the shampooing process, polydimethylsiloxane also has the effect of suppressing and defoaming, which helps to control the generation and stability of foam.
 
III. Safety and precautions
 
Safety: The use of polydimethylsiloxane in shampoo is safe, and the content is usually low to avoid irritating the skin. However, for some people with sensitive skin, there may still be adverse reactions, so skin testing should be conducted before use.
 
Caution: Although polydimethylsiloxane itself is non-toxic and tasteless, excessive or improper use may still have negative effects on hair and scalp. For example, excessive use may lead to problems such as greasy hair and clogged scalp. Therefore, when using shampoos containing polydimethylsiloxane, it is important to use in moderation and thoroughly rinse off.
 
Polydimethylsiloxane, a common ingredient in shampoo, has multiple functions such as lubrication, softness, and gloss enhancement. However, it is still necessary to pay attention to proper use and thorough rinsing to avoid negative effects on the hair and scalp. At the same time, for people with sensitive skin, skin testing should be conducted before use to ensure safe use.