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Ionic liquids (ILs) recyclable for cellulose dissolution and regeneration: molecular structure / performance ratio, and properties of regenerated cellulose

Grant number: 19/02928-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2019
Effective date (End): December 31, 2020
Field of knowledge:Engineering - Sanitary Engineering - Environmental Sanitation
Principal researcher:Omar Abou El Seoud
Grantee:Marcella Teixeira Dignani
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:14/22136-4 - Use of green solvents and their mixtures for optimizing chemical processes, AP.TEM

Abstract

Coordinated by Prof. Dr. Omar A. El Seoud-IQ-USPThis Thematic Project aims to rationalize, in molecular terms, the interactions between solutes and pure solvents or their binary mixtures and the application of this knowledge in the improvement of chemical processes of interest. Preferably green solvents with low environmental impact will be used; for example, water, esters of carbonic acid and ionic liquids. Among the objectives of the project, we highlight the effects of the structure of ionic liquids and molecular solvents, as well as the composition of mixtures of these, on their ability to solubilize cellulose and control their derivatization in terms of the degree of substitution and regioselectivity of the product. By the use of suitable solvents, it is intended to increase the efficiency of emission of chemiluminescent reactions with analytical relevance, and the manufacture of cellulosic nanocomposites. Suitable solvents for a certain application will be chosen from their macroscopic and microscopic properties. The microscopic parameters will be determined by studying the solvatochromic behavior of natural, semisynthetic and synthetic dyes in the media in question. The thermodynamic magnitudes of the interaction between the solute and the medium will be determined by isothermal titration calorimetry.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DIGNANI, MARCELLA T.; BIONI, THAIS A.; PAIXAO, THIAGO R. L. C.; EL SEOUD, OMAR A. Cellulose Dissolution in Mixtures of Ionic Liquids and Dimethyl Sulfoxide: A Quantitative Assessment of the Relative Importance of Temperature and Composition of the Binary Solvent. Molecules, v. 25, n. 24 DEC 2020. Web of Science Citations: 0.
BIONI, THAIS A.; DE OLIVEIRA, MAYARA L.; DIGNANI, MARCELLA T.; EL SEOUD, OMAR A. Understanding the efficiency of ionic liquids-DMSO as solvents for carbohydrates: use of solvatochromic- and related physicochemical properties. NEW JOURNAL OF CHEMISTRY, v. 44, n. 35, p. 14906-14914, SEP 21 2020. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.