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- Sponsor Spotlight: DSM Nutritional Products, LLC
- Sponsor Spotlight: Active Organics
- Skin/Sun Science (moderator)
- Do Nanoparticles Penetrate the Skin? Sunscreens and Beyond
- Optics, Physiology and Biophysics of Color Cosmetics
- Skin's Microbiome and Topical Product Implications
Reactivating Sunscreens via Azobenzene Compounds
Speaker: Jin-ye Wang, PhD, Professor of Biomedical Engineering and Team Leader of Biomaterials Lab, Shanghai Jiaotong University
Thursday, June 26 1:45–2:30pm
A novel technology that enables the development of reactivating sunscreens will be discussed, specifically whether azobenzene compounds are attached to a cholesterol group. By exposing the material's surface to a source of UV light, trans-azobenzene is converted to a cis-azobenzene. Then, by allowing the cis-azobenzene to return to the trans state, it forms reactivated trans-azobenzene that can be reactivated or regenerated.
The cholesterol group helps to incorporate azobenzene compounds into liposomal membranes more easily. Also, when encapsulating active substances such as ascorbic acid, the liposomes can be used as photo-controlled drug delivery systems.
Details to be discussed include the physico-chemical properties and biocompatibility of the technology, UV absorption spectra, photo-isomerization, stability, cytotoxicity, phototoxicity and skin permeation.
All exhibitors, sessions, presenters, times and locations are subject to change without notice.