Banca de QUALIFICAÇÃO: RAILSON CARLOS SOUZA DA LUZ

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : RAILSON CARLOS SOUZA DA LUZ
DATA : 18/12/2018
HORA: 08:00
LOCAL: sala de aula do LAPET
TÍTULO:

POTENTIAL FOR THE APPLICATION OF XANTHAN GUM-QUITOSAN POLYELECTROLYTE COMPLEX ADDITIVES WITH NANOSYLIC IN AQUEOUS DRILLING FLUIDS

PALAVRAS-CHAVES:

Nanosilica-chitosan hybrid material, polyelectrolyte complex, aqueous drilling fluid, rheological behavior, filtration.

PÁGINAS: 92
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Polímeros e Colóides
RESUMO:

The incorporation of inorganic nanomaterials into polymer chains leads to the formation of new materials with specific characteristics and different from those presented by the originating materials. These materials are referred to as polymeric hybrid materials. The incorporation of nanosilica into the polymer chains of chitosan in the formation of the nanosilica-chitosan hybrid material was the initial target of this work, with a significant influence of the production process on the thermal properties and behavior in aqueous media of these materials. The nanosilica-chitosan hybrid materials were also used as precursors in the formation of polyelectrolyte complexes, with the use of xanthan gum as polyanion, which, according to the results obtained from the viscoelastic behavior, provide the formation of a more structured three-dimensional network, when compared to the polyelectrolyte complex composed only of xanthan gum and chitosan. Both materials were applied in aqueous drilling fluids, providing an increase in the apparent viscosity values, which favors the transport of the gravel produced during drilling of oil wells, guaranteeing the cleaning efficiency of the same. In relation to the filtration control of the drilling systems, the hybrid materials of nanosilica-chitosan presented reduction of the filtrate volume due to the formation of a less permeable plaster. Similar result was also observed at high temperature (90^oC). In turn, the polyelectrolytic complexes presented similar behavior to the hybrid materials, ie low filtrate volumes.

MEMBROS DA BANCA:
Interno - 2212519 - JULIANA DE SOUZA NUNES
Interno - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS
Presidente - 1149440 - ROSANGELA DE CARVALHO BALABAN