Application of phenyl salicylate-sepiolite systems as ultraviolet radiation filters

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The interaction between phenyl salicylate and sepiolite has been studied using drugclay systems obtained by melting and grinding. The samples have been characterized by powder Xray diffraction, differential thermal and thermogravimetric analyses, and Vis-UV and FT-IR spectroscopies. 'Free' water molecules are steadily substituted by the drug molecules, without any chemical change as shown by FT-IR. The systems prepared improved the protecting ability of the pure sepiolite or the pure drug against ultraviolet radiation, especially in the so-called 'C' range (290-190 nm).

Document Type: Research Article


Affiliations: 1: Departamento de Qú ımica Inorgánica, Universidad de Salamanca, Salamanca, Spain 2: Instituto de Recursos Naturales y Agrobiolog´ ıa, CSIC, Cordel de Merinas, s/n, Salamanca, Spain

Publication date: September 1, 1998

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