Agradecimentos: This study was supported by São Paulo Research Foundation (FAPESP, Grants No. 15/25406-5 and 16/04514-7) and Coordination for the Improvement of Higher Education Personnel (CAPES, Finance Code 001, C.E.P.S scholarship). The authors would like to thank LNNano/CNPEM for the access to the electron microscopy facility and technical support in the execution of the proposal Ver menos

Abstract: Nanocellulose is a well-known stabilizer for several colloidal dispersions, including emulsions and solid nanoparticles, replacing surfactants, polymers, and other additives, and therefore providing more minimalistic and eco-friendly formulations. However, could this ability be extended to stabilize oil droplets and inorganic nanoparticles simultaneously in the same colloidal system? This work aimed to answer this question. We evaluated both cationic and anionic nanofibrillated celluloses to stabilize both titanium dioxide nanoparticles and oil droplets. The resulting suspensions held their macroscopic stability for up to 2 months, regardless of pH or surface charge. Cryo-TEM images revealed a complex network formation involving nanofibers and TiO2 nanoparticles, which agrees with the high viscosity values and gel-like behavior found in rheology measurements. We propose that the formation of this network is responsible for the simultaneous stabilization of oil droplets and TiO2 nanoparticles, and that this may be used as a formulation tool for other complex systems Ver menos