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As picadas de escorpiões estão entre as principais causas de acidentes com animais peçonhentos no Brasil e no mundo. O soro antiescorpiônico contém imunoglobulinas de animais imunizados com a peçonha de escorpiões, que são capazes de proteger pessoas susceptíveis. A produção do soro antiescorpiônico é alvo de melhorias, considerando a evolução de adjuvantes que podem auxiliar nas imunizações e aumentar o estímulo para produção. Sistemas de liberação de fármacos nanoemulsionados são promissores adjuvantes utilizados em muitos imunizantes, e propomos avalia-los na produção do soro antiescorpiônico. Desenvolvemos nanoemulsões, de forma inovadora, para atuar como sistemas de liberação para a peçonha do escorpião Tityus serrulatus e testar seu potencial adjuvante em camundongos Balb/c. No desenvolvimento das formulações, avaliou-se fatores da tecnologia que afetaram positivamente a ação adjuvante. Os resultados mostraram que nanoemulsões obtidas por técnicas de baixa energia apresentaram estabilidade de longo prazo, com perfis de tamanho de gotícula uniforme e reduzido (menor que 200 nm). As formulações desenvolvidas foram estáveis após alterações de pH e salinidade. As nanoemulsões foram obtidas revestidas com o polímero catiônico poli (etilenoimina), sem que também afetasse a estabilidade. As formulações desenvolvidas mostraram ser capazes de carrear os antígenos ligados de forma inespecífica, com as interações entre as nanoemulsões e a peçonha do escorpião demonstradas por espectroscopia FTIR. A peçonha carreada foi menos tóxica que a não carreada em relação à atividade hemolítica, apresentando ainda baixa toxicidade em células de macrófagos (RAW 264.7). A atividade adjuvante foi avaliada pela produção de imunoglobulinas em animais imunizados, testando as formulações desenvolvidas em comparação com o adjuvante convencional hidróxido de alumínio. Animais imunizados com o adjuvante nanoemulsão catiônica produziram comparativamente mais imunoglobulinas que o adjuvante nanoemulsão não-catiônica e que o adjuvante baseado em partículas de alumínio. Scorpion stings are major cause of envenoming by animals in endemic countries, like Brazil. The scorpion antivenom is product that is able to neutralize and to protect sensitive people. However, its production has been subject of improvements taking in account the innovations on the immuno-adjuvant production and the difficult on the venom extraction, from captive animals, and the venom its toxicity. Scorpion venom has a complex composition and an adjuvant for crude venom represents a challenge that can be possibly fulfilled with drug delivery systems based on nanotechnology. In this research, we seek for innovation developing new nanoemulsion formulations to act as drug delivery system for Tityus serrulatus scorpion venom and to evaluate its immunizing properties on Balb/C mice. The nanotechnology development covered features that positively affected the adjuvant activity. We demonstrated that low energy techniques for production of the nanoemulsions allowed long term stability to the formulations with reduced and uniform droplet size (below 200 nm). The developed formulations were also robust to pH and saline variation. The formulations were also able to be covered by PEI and to maintain their stability. The formulations demonstrated capable to nonspecifically adsorb crude venom, as showed through FTIR spectroscopy technique as intermolecular interactions between nanoemulsions and crude venom. Nanoemulsions venom-load also could reduce toxicity related to venom hemolytic activity and to present low toxicity against macrophage cells (RAW 264.7). Adjuvant activity was demonstrated in comparison with aluminum hydroxide adjuvant, which scored for nanotechnology feature of act as crude venom adjuvant more efficiently to induce specific anti-IgG immunoglobulins using PEI-covered nanoemulsions.