At a time when sunscreen technology is constantly innovating, silicone micropowder has become a key ingredient to improve the performance of sunscreen products with its unique physical properties and chemical stability. Its sunscreen effect is mainly achieved through the following mechanisms:
Dual barrier of ultraviolet absorption and scattering
Silicon dioxide (SiO₂), the core ingredient of silicone micropowder, has a high specific surface area and nanometer-scale particle size structure, which can reflect and scatter ultraviolet rays through physical action to form the first protective barrier. When the particle size of the micropowder is controlled below 100 nanometers, its surface electron transition characteristics can absorb part of the medium-wave ultraviolet rays (UVB), while the scattering effect effectively blocks the long-wave ultraviolet rays (UVA). This "absorption + scattering" synergistic effect significantly improves the broad-spectrum protection ability of sunscreen products.
Balance between skin feel optimization and formula stability
The spherical porous structure of silicone micropowder gives it an excellent smooth touch, which can replace traditional ingredients such as talcum powder and reduce the stickiness of sunscreen. At the same time, after its surface is modified by organosilicon compounds such as dimethylsiloxane, it can form a stable dispersion system with the oil phase, prevent nanoparticles from agglomerating, and ensure that the sunscreen evenly covers the skin surface. This feature not only improves the comfort of the product, but also prolongs the durability of the sunscreen film.
Safe and environmentally friendly sustainable choice
Compared with the skin penetration risk that may be caused by traditional chemical sunscreens, organosilicon micropowder, as an inorganic mineral component, has the characteristics of large molecular weight and strong chemical inertness and will not be absorbed by the skin. Experimental data show that its content of heavy metals such as lead and mercury is far lower than the safety standard, and its biodegradability is better than some organic sunscreens, which is in line with the current development trend of "ocean-friendly" sunscreen products.
From the laboratory to the consumer market, organosilicon micropowder is playing the role of "invisible guardian" to promote sunscreen technology towards efficiency, safety and comfort.