Banca de QUALIFICAÇÃO: ARTHUR MATHAUS VARELA BARBOSA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR MATHAUS VARELA BARBOSA
DATE: 28/08/2020
TIME: 09:00
LOCAL: VIRTUAL
TITLE:

DETERMINATION OF PHYSICOCHEMICAL, THERMODYNAMIC AND RHEOLOGICAL PROPERTIES OF NADES BASED ON SUGARS AND CITRIC ACID

KEY WORDS:

DES. Sustainability. Fundamental properties.

 

PAGES: 39
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Deep eutectic solvents (DES) are known today as “green solvents”, presenting attractive properties for the industry and meeting current sustainability requirements. These solvents consist of a hydrogen bond donor component (HBD) and another hydrogen bond acceptor component (HBA). An important class of DES that has gained prominence are the deep natural eutectic solvents (NADES), derived from natural sources and fundamental metabolic reactions of living organisms. NADES have low levels of toxicity and low cost, which has attracted the attention of researchers. The determination of the physical-chemical, thermodynamic and rheological properties of these mixtures is essential for further application. In this study, the feasibility of forming deep eutectic solvents formed by organic sugars (fructose, sucrose, maltose and glucose), citric acid and choline chloride will be investigated. The fundamental properties of these NADES will be evaluated, such as density, viscosity, surface tension, refractive index, molar heat capacity, thermal conductivity and diffusivity, under different temperature conditions (293 - 333 K). The effect of solvents (water, ethanol, isopropanol and butanol) on the properties of mixtures with NADES will also be evaluated.

BANKING MEMBERS:
Presidente - 1543286 - CAMILA GAMBINI PEREIRA
Externa ao Programa - 214.141.303-68 - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN
Externa à Instituição - ROGERIA HELEN LIMA VIDAL