This thesis investigates the formation and characterization of zwitterionic gels and microgels made by photoinduced polymerization, with a particular focus on Carboxybetaine Methacrylamide (CBMAA) as a key component. The research centers on gel samples composed of two types of monomers: CBMAA and Poly(Ethylene Glycol) Methyl Ether Methacrylate (MeOEGMA), enhancing the understanding of zwitterionic hydrogels and their potential applications, formation, properties, and characterization. The initial sections of the thesis provide a comprehensive introduction on granular hydrogels including details on microparticles fabrication methods, including extrusion fragmentation, batch emulsion, and microfluidic systems, to describe assembly processes and common applications. Moreover, an overview of CBMAA polymer is presented, highlighting its unique zwitterionic properties and chemistry.