Banca de QUALIFICAÇÃO: ARTHUR MATHAUS VARELA BARBOSA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR MATHAUS VARELA BARBOSA
DATE: 16/12/2023
TIME: 09:00
LOCAL: Virtual
TITLE:

DETERMINATION OF PHYSICAL-CHEMICAL PROPERTIES OF NADES BASED ON SUGAR, CHOLINE CHLORIDE AND CITRIC ACID

KEY WORDS:

NADES, sustainability, synthesis, physicochemical properties, organic sugars.

PAGES: 71
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Operações de Separação e Mistura
SUMMARY:

Deep Eutectic Solvents (DES) are known today as "green solvents," presenting attractive properties for the industry and meeting current sustainability requirements. These solvents are composed of a hydrogen bond donor component (HBD) and another hydrogen bond acceptor component (HBA). An important class of DESs that has gained prominence is Natural Deep Eutectic Solvents (NADES), derived from natural sources and fundamental metabolic reactions of living organisms. NADES possess desirable characteristics such as low toxicity, biodegradability, and low cost, which have drawn researchers' attention to their use in solubility processes, liquid-liquid extraction, among other applications. The continuous development of synthesis methods and a deep understanding of NADES properties will contribute to their successful application in various chemical processes. In this study, the viability of synthesizing NADES formed by organic sugars (fructose, sucrose, and glucose), citric acid, and choline chloride was investigated. Their fundamental physicochemical properties, such as density, viscosity, and electrical conductivity, were evaluated over a temperature range between 303 – 333 K. Refractive index and pH properties were obtained at 293 K and 1 atm. These properties were also assessed and studied for two mixtures based on fructose and citric acid with an alcohol (ethanol).

COMMITTEE MEMBERS:
Externa ao Programa - 1415919 - KATHERINE CARRILHO DE OLIVEIRA DEUS - UFRNExterna ao Programa - 1218001 - LIANA FRANCO PADILHA - UFRNExterna à Instituição - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN