4. In situ encapsulation of a UV filter in MCM-41 mesoporous silica
To develop the novel concept of in situ encapsulation of a UV filter in mesoporous silica, and then to test the performance of the resulting material, PBSA phenylbenzimidazole sulphonic acid, a UV filter which international regulations allow to be used up to 3% by mass in formulations, was selected.
PBSA is a hydrophilic molecule widely used as a sun protection agent, acting as an active ingredient. PBSA is soluble in perspiration, bathing water, etc., making it difficult to stabilize on the skin over time. Its permanent encapsulation in a silica carrier should make it non-soluble in aqueous media. In this way, it can be fixed to the skin via the lipophilic phase of the cosmetic formulation.
4.1 Principle of in situ co-encapsulation
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In situ encapsulation of a UV filter in MCM-41 mesoporous silica
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Bibliography
- (1) - DEMARCHEZ (M.) - Le rayonnement solaire et la peau : définitions - http://www.biologiedelapeau.fr
- (2) - ROCQUEFELTE (X.), GOUBIN (F.), JOBIC (S.), DEMOURGUES (A.) -...
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