Fluidos com carbono[s] nanoestruturados modificados com aminas e acrilamida

Abstract

The carbon nanomaterials exhibit excellent thermal, electrical, optical and mechanical properties, so they have been incorporated into conventional materials in order to obtain materials with improved properties. However they tend to aggregate by van der Waals forcesand just can transfer their good properties if they show a good dispersion in the matrix. Therefore, various external modifications were proposed with the aim to obtain a better dispersion. This work was divided in three parts. The first part contain the preparation and characterization of modified carbon black by ethylenediamine (via diazonium reaction) andacrylamide (in situ polymerization) as well as viscosity time tests in saline at 70 °C. The second part was conducted preparation and characterization of modified carbon nanotube by tetraethylenepentamine (via microwave reaction) and acrylamide (in situ polymerization), andthe same tests were performed under the same conditions of the first part. All prepared fluids such as nanomaterials obtained in the first and second part showed a viscosification and also showed increased stability at high shear rates. These results indicate the possibility of thenanomaterials produced in technological applications such as enhanced oil recovery. The third part consists in the carbon black surface modification, however with another amine (dodecylamine) and using another method (coupling agent). The phase transfer was themethod performed to obtain stable aqueous suspensions of the nanomaterial at high temperatures and salinity medium. This method increased the processing capacity of the material. The nanomaterial obtained had excellent flow through a sandstone column confirming these nanoparticles have potential application as nanoreporters in oil reservoirs. So we got up the formulation of a new generation of kinetically stable nanofluids to contribute to the scientific and technological development of new nanomaterials and residual oil extraction processes.