Innovations in Ionic Liquid-Based Surfactants and Interfacial Phenomena" offers a comprehensive exploration of ionic liquid-based surfactants (ILBSs) and their transformative potential. This book is divided into three sections. Section I establishes the fundamental properties of ionic liquids (ILs) and ILBSs, emphasizing their unique structures, environmental advantages, and flexible design. It details the diverse types of ILBSs, highlighting their individual characteristics and applications. Section II delves into the crucial interfacial behavior of ILBSs, examining their role in reducing interfacial tension, influencing micelle formation, enhancing emulsification processes, and modifying surface wettability. The mechanisms underlying these phenomena are thoroughly investigated, with particular attention paid to the impact of the structure of ILBSs on their performance. Section III showcases the broad applicability of ILBSs across various industries. Specific applications discussed include the stabilization of particle dispersions, the improvement of extraction techniques, and the significant enhancement of oil recovery from challenging reservoirs. This book bridges the gap between fundamental principles and practical applications, equipping the readers with the necessary knowledge to harness the revolutionary potential of ILBSs. It serves as an invaluable resource for researchers, academics, and professionals in this rapidly evolving field.