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Previous issue date: 2015-08-18 / A ind?stria de petr?leo necessita de v?rias subst?ncias qu?micas em seus processos de extra??o e investe em novas tecnologias a todo o momento. Os sistemas micelares do tipo-minhoca-WLM e os complexos polieletrol?ticos-PECs est?o sendo estudados para ingressar como novas tecnologias na extra??o de ?leo. Esta tese objetiva obter, caracterizar e identificar esses sistemas coloidais utilizando t?cnicas de espalhamento de luz como principais ferramentas; possibilitando o conhecimento de base para poss?veis aplica??es na ind?stria petrol?fera. Os par?metros obtidos no DLS, b, GC e n sofreram transi??es na concentra??o tensoativo/co-tensoativo 200g/L. A adi??o da fase ?leo, xileno, dificulta a transi??o de micelas esf?ricas para micelas minhoca. No SAXS, a rela??o RG,O/ RG,S atinge um m?ximo que corrobora com a transi??o no DLS. b aumenta bruscamente, n se torna mais homog?neo, GC,2 e a contribui??o para o segundo processo, f2, foram visualizados para raz?es poli?nion/polic?tion WAC pr?ximas de 2. Essa regi?o, no SAXS, aglomerados de PECs se adsorvem nas part?culas prim?rias, que contribuiu para o comportamento dos gr?ficos de Kratky. As fun??es P(r) perdem seu formato ?sino? e se alargam. As contribui??es de ?rea S17 e S29 foram maiores para menores valores de WAC e S37 foi influente em valores maiores. / The oil industry needs various chemicals compounds in their extraction processes and
invests in new technologies all the time. Worm-like micelles-WLM and polyelectrolyte
complexes-PECs have been studied to join as new technologias in oil extraction processes. This
thesis aims to obtain, characterize and identify these colloidal systems using as a tool light
scattering experiments; enabling the required knowledge to applied them in oil industry. To the
surfactants systems, the parameters from DLS, b, GC and n in a function of surfactant/co-surfactant
concentrations suffered transitions around 200 g/L. The addition of oil phase, xylene, hinders the
transition from spherical micelles to worm-like micelles. In SAXS, the ratio RG,O/ RG,S reaches a
maximum value which corroborates with the transition in DLS. To PECs, b increases sharply, n
becomes more homogeneous, GC,2 and second contribution to the process, f2, were visualized for
polyanion/polycation ratio with WAC next 2. This region in SAXS, PECs clusters adsorb in primary
particles, which contributed to the behavior of Kratky graphics. The pair distribution functin, P(r),
lose its bell shape and widen. The S17 and S29 were higher for lower values of WAC ratio. S37 was
influential in higher values.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20560 |
| Date | 18 August 2015 |
| Creators | Morais, Wildson Arcanjo de |
| Contributors | 90623207753, http://lattes.cnpq.br/8143800826985556, Wanderley Neto, Alcides de Oliveira, 00738841463, http://lattes.cnpq.br/4789528535524269, Nunes, Juliana de Souza, 05245655462, http://lattes.cnpq.br/6612004116272109, Vasconcelos, Cl?udio Lopes de, 02963319452, http://lattes.cnpq.br/7657769529479698, Santos, Zilvam Melo dos, 01211514412, http://lattes.cnpq.br/4514068026830748, Fonseca, Jos? Luis Cardozo |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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