Johanna Saunier is a lecturer at the University of Paris-Saclay. She was awarded a doctorate in Materials Science and Engineering from INPG (1998–2001). In 2001–2003, she was temporary teaching and worked as a research attaché at the Evry Val d’Essonne University. Her research themes include polymeric materials intended for medical use: the effects of aging and sterilization on the surface segregation of low-molecular-weight compounds (blooming); the study of the polymorphism of additive-type migrants and implications for surface properties; the chemical and topological characterization of polymer surfaces (blooming, degradation, etc.): implications for surface properties and biocompatibility.