Adaptability of polyurea microcapsules loaded with octyl salicylate for sunscreen application: influence of shell thickness of microfluidic-calibrated capsules on UV absorption efficiency

The common chemical ultraviolet (UV) filters such as octyl salicylate that are used in sunscreen cream may cause irritation and other unknown medical conditions. One possible route to avoid the direct contact of UV with human skin is enclose those microcapsules. In this study, microcapsules a size calibrated at 78 μm via microfluidics but different shell thicknesses (0.4 2.5 μm) for first time, study influence thickness on absorption efficiency. results show has no obvious Besides, rough model based Beer–Lambert law compare experimental results.