Thanks to its unique chemical and physical properties, since its discovery to date polyaniline (PANI) has attracted the interest of both scientific community and industry. However, owing to emerging global necessities and stringent directives for environmental protection, innovative protocols for materials production are crucial. The research objective of this work is developing innovative "green" approaches to prepare PANI and PANI composites, as well as investigating their effectiveness as shields for electromagnetic interference (EMI), nanofibers for biomedical applications and materials for stress/strain sensors .