Use of Time Domain - NMR for the characterization of high viscosity organic systems

• Grant number: 11/14099-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: November 01, 2011
• End date: October 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Eduardo Ribeiro de Azevedo
• Grantee: Fabiana Diuk de Andrade
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The aim of this project is to develop a Nuclear Magnetic Resonance (NMR) approach with emphasis on time domain analysis to characterize dynamics and structural properties of different high viscosity organic systems with industrial interest: biopolymers gels and heavy oils. Although the two specific applications are quite different, the methodologies to be used in NMR studies are similar and/or complementary. Biopolymers gels are colloidal systems with solid character where the liquid phase is immobilized by a three-dimensional polymer network. NMR measurement such as T1, T2 and T1r relaxation, 1H multiple quantum and 1H spin diffusion will be used to investigate structural and dynamics properties in gels systems based on wheat gluten, that have unique viscoelastic properties of importance not only in food industry, but also in many other areas. The other study involves the effects of heavier compounds of petroleum, the asphaltenes, on their rheological properties such as viscosity. Asphaltenes are a complex mixture of compounds of various molecular weights and structures, including condensed aromatic rings with alkyl groups, heteroatms and metals. These compounds can affect oil production in all stages due to their tendency to aggregate, which causes increased viscosity and leads to significant economic losses. In this study, high resolution, relaxometry and multiple quantum NMR techniques will be used to study the composition and rheological properties such as viscosity of heavy oils, with particular emphasis on the rule played by asphaltenes. We seek for a correlation between the chemical composition, structural and dynamic properties on this systems.

Scientific publications

(4)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

CAROSIO, MARIA G. A.; BERNARDES, DIEGO F.; CARVALHO, ANDRE DE S.; COLNAGO, LUIZ A.. Non-invasive Measurements of Oilseed Temperature in Soil and Soil Thermal Diffusivity Using Time-Domain NMR Relaxometry. APPLIED MAGNETIC RESONANCE, v. 49, n. 10, p. 1119-1127, OCT 2018. (14/22126-9, 09/09734-1, 11/14099-3)

CAROSIO, MARIA G. A.; BERNARDES, DIEGO F.; ANDRADE, FABIANA D.; MORAES, TIAGO B.; TOSIN, GIANCARLO; COLNAGO, LUIZ A.. Measuring thermal properties of oilseeds using time domain nuclear magnetic resonance spectroscopy. Journal of Food Engineering, v. 173, p. 143-149, MAR 2016. (11/14099-3, 12/20247-8, 09/09734-1)

SILVA, LORENA M. A.; ANDRADE, FABIANA DIUK; FILHO, ELENILSON G. A.; MONTEIRO, MARCOS ROBERTO; DE AZEVEDO, EDUARDO RIBEIRO; VENANCIO, TIAGO. NMR investigation of commercial carbon black filled vulcanized natural rubber exposed to petrodiesel/biodiesel mixtures. FUEL, v. 186, p. 50-57, DEC 15 2016. (11/14099-3, 09/18354-8)

ANDRADE, FABIANA DIUK; NEWSON, WILLIAM R.; BERNARDINELLI, OIGRES DANIEL; RASHEED, FAIZA; COBO, MARCIO FERNANDO; PLIVELIC, TOMAS S.; DEAZEVEDO, EDUARDO RIBEIRO; KUKTAITE, RAMUNE. An insight into molecular motions and phase composition of gliadin/glutenin glycerol blends studied by C-13 solid-state and H-1 time-domain NMR. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v. 56, n. 9, p. 739-750, MAY 1 2018. (11/14099-3)