4.6 Article

Preparation and ultraviolet sunscreen properties of organic-silica hybrid particles encapsulated benzophenone-3

Journal

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 101, Issue 2, Pages 468-476

Publisher

SPRINGER
DOI: 10.1007/s10971-022-05723-1

Keywords

Benzophenone-3(BP-3); Organic-silica hybrid particles; Sunscreen; UV radiation

Funding

  1. National Natural Science Foundation of China [22078159, 21003074, U19B2001, 21878159, 21706131, 21908092]
  2. Natural Science Foundation of Jiangsu Province [BK20181378, BK20131407]
  3. Open Fund of Beijing Advanced Innovation Center for Food Nutrition and Human Health [20161002]

Ask authors/readers for more resources

In this study, organic-silica hybrid particles with inherent UV absorption were synthesized, and a BP-3@P2-HTESC composite material with dual sun protection functions was constructed. The composite material exhibited good UV absorption, excellent thermoresistance, and controlled release properties.
In the present study, ultraviolet (UV) absorptive organic-silica hybrid particles with naturally UV absorption, 2-hydroxy-N-[3-(triethoxysilyl)propyl]benzamide (2-HTESC), have been synthesized through the reaction of 3-aminopropyltriethoxysilane (APTES) and salicylic acid. The chemical structure of 2-HTESC monomer was characterized by FT-IR and H-1 NMR spectra. Since benzophenone-3(BP-3) was often served as an organic UV filter in sunscreen formulations, yet its allowable load was limited to 6% in the formulations of lotions and creams. Therefore, our goal was to prepare an absorber (2-HTESC) with its own UV absorption to trap BP-3 to construct a target sunscreen BP-3@P2-HTESC composite material with dual sun protection functions, while also reducing the leakage of BP-3 into emulsion and cream. By comparing the two reactions, it was found that the self-catalytic reaction was superior to the alkali-catalyzed reaction. BP-3 was successfully loaded into P2-HTESC molecular network by hydrolytic polycondensation under self-catalytic condition, and the maximum encapsulation rate reached 68%. In addition, BP-3@P2-HTESC-1 sunscreen under self-catalytic reaction showed good UV absorption, excellent thermoresistance, and less controlled release of BP-3 organic molecules to match the maximum allowable amount of BP-3 in sunscreen products. [GRAPHICS] .

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