In order to improve the photostability of p-aminobenzoic acid as UV-B sunscreen agent, an electrostatic complex with sodium alginate was formed. The occurring of the complex formation was demonstrated by rheological analysis and by difference spectrophotometry. Photodegradation of PA-BA and PABA-alginate complex, resulting from irradiation by sunlamp, was examined by UV spectrophotometry. The complex showed a greater UV absorbance capacity and nearly overlapped photodecomposition rate in comparison with the original sunscreen agent.
PABA-alginate complex as sunscreen agent / Iannuccelli, Valentina; Sala, Nicoletta; Costantino, Luca; Coppi, Gilberto. - In: JOURNAL OF APPLIED COSMETOLOGY. - ISSN 0392-8543. - STAMPA. - 21:4(2003), pp. 159-166.
PABA-alginate complex as sunscreen agent
IANNUCCELLI, Valentina;SALA, Nicoletta;COSTANTINO, Luca;COPPI, Gilberto
2003
Abstract
In order to improve the photostability of p-aminobenzoic acid as UV-B sunscreen agent, an electrostatic complex with sodium alginate was formed. The occurring of the complex formation was demonstrated by rheological analysis and by difference spectrophotometry. Photodegradation of PA-BA and PABA-alginate complex, resulting from irradiation by sunlamp, was examined by UV spectrophotometry. The complex showed a greater UV absorbance capacity and nearly overlapped photodecomposition rate in comparison with the original sunscreen agent.
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