On the dazzling shelves of cosmetics, have you noticed an interesting phenomenon? The once "incompatible" water and oil can now blend perfectly in facial cleansers and serums, forming a fine and stable texture? This is often attributed to a behind-the-scenes hero - PEG-12 Polydimethylsiloxane.
It is essentially an organic silicon oxide modified by polyether. You can think of it as a bilingual translator. Its molecular structure is very special; it has hydrophilic ethoxy groups on the side chains, allowing it to mix with water in any proportion; at the same time, the main chain of the silicon oxide retains the hydrophobic property. This "bifunctionality" gives it excellent surface activity, which can significantly reduce the surface tension of liquids, allowing water and oil to easily "make peace" and form a uniform and stable emulsion.
In addition to emulsification, it is also an excellent "skin sensation regulator". Products containing it have a silky and soft touch when applied, neither oily nor causing acne, and can maintain skin luster for a long time. What's more, it is gentle on the skin and has no irritation, and can help other active ingredients penetrate better, making the skincare effect twice as effective with half the effort. From gel water to cream, from facial cleanser to aerosol, its presence is everywhere, silently enhancing our usage experience.