The molecular structure of UV absorbers usually contains conjugated double bonds or aromatic rings, which can absorb ultraviolet rays of specific wavelengths (mainly UVA and UVB).
When ultraviolet rays irradiate the absorbent molecules, the electrons in the molecules transition from the ground state to the excited state, absorbing the energy of ultraviolet rays.
After absorbing ultraviolet light, the molecule is in an excited state with high energy. In order to return to the stable ground state, the absorbent molecules will release energy in the following ways:
①Non radiative transition: convert energy into heat energy and release it to the surrounding environment.
②Fluorescence or phosphorescence: part of the energy may be released in the form of visible light (rarely).
By absorbing ultraviolet rays and converting them into heat energy, UV absorbers reduce the direct damage of ultraviolet rays to materials (such as plastics, coatings) or skin.
In sunscreen products, UV absorbers can prevent UV rays from penetrating the skin and reduce the risk of sunburn, photoaging and skin cancer.
Our UV absorbers are suitable for polymers, coatings and cosmetics. If you need products, please feel free to contact us, we will respond within 48 hours.
Post time: Feb-25-2025