The goal of this research was to formulate a bionanocomposite with topical antiseptic capability.It was noted that theses speaking only about bionanocomposites are rare, so this book can be a reference on chitosan, or on chitosan bionanocomposite hydrogels, functionalized with silver nitrate and stabilized with sodium hydroxide. It emphasizes the importance of supramolecular complexation of chitosan particles, and comprises the reaction mechanism which occurs between chitosan monomers and acetic acid molecules in aqueous media, with a specific technique which makes it possible to obtain Nano chitosans.