As the impact of ultraviolet (UV) radiation on the aging of polymer materials and human skin damage becomes increasingly prominent, UV absorbers, as key protective materials, are being widely used in various fields. These materials can selectively absorb high-energy UV rays and convert them into heat or harmless low-energy radiation through energy transformation, effectively preventing material degradation and skin damage.
     UV absorbers come in a variety of types, with core categories each having unique characteristics. Benzophenones are the most widely used, achieving energy conversion through intramolecular hydrogen bond structures and exhibiting good compatibility with most polymers. Benzotriazoles have a broad absorption spectrum and do not affect the appearance of products, making them the preferred choice for colorless and transparent materials. Salicylates, known as "precursor-type" absorbers, rearrange to form highly efficient absorption structures upon UV irradiation, offering excellent cost-effectiveness. Triazines have emerged as a new option in high-end protection fields due to their high absorption efficiency. In addition, quenchers such as organonickel complexes supplement protection through energy transfer mechanisms, further expanding application scenarios.
     In the textile industry, the application of UV absorbers is particularly mature. UV-protective fibers and fabrics can be prepared through methods such as spinning incorporation, finishing application, microcapsule coating, or lamination. These products can block more than 80% of UV rays and reduce the temperature inside clothing, and have been widely used in sportswear, parasols and other products. Meanwhile, this material also plays an important role in industries such as plastics, paints, and cosmetics, providing long-term light stability protection for products.
     With the increasing demand for environmental protection and high performance, UV absorbers are developing towards low toxicity, high efficiency, and good compatibility. Composite products with multiple protective functions and special absorbers suitable for emerging materials will become the focus of industry research and development, providing reliable UV protection solutions for more fields.

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