Recent trends in (ligno)cellulose dissolution using neoteric solvents: switchable, distillable and bio-based ionic liquids

2013 ◽  
Vol 89 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Pablo Domínguez de María
Keyword(s):  
Ionic Liquids ◽  
Cellulose Dissolution ◽  
Recent Trends ◽  
Neoteric Solvents

scholarly journals Synthesis, antibiotic structure–activity relationships, and cellulose dissolution studies of new room-temperature ionic liquids derived from lignin

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Shihong Liu ◽  
Michael Gonzalez ◽  
Celine Kong ◽  
Scott Weir ◽  
Aaron M. Socha
Keyword(s):  
Antibacterial Activity ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Oxidation Products ◽  
Cellulose Dissolution ◽  
Melting Points ◽  
E Coli ◽  
Alkyl Chains ◽  
Renewable Feedstocks ◽  
Commodity Chemicals

Abstract Background Ionic liquids (ILs) are promising pretreatment solvents for lignocellulosic biomass, but are largely prepared from petroleum precursors. Benzaldehydes from depolymerized lignin, such as vanillin, syringaldehyde, and 4-methoxy benzaldehyde, represent renewable feedstocks for the synthesis of ionic liquids. We herein report syntheses of novel lignin-derived ionic liquids, with extended N-alkyl chains, and examine their melting points, cellulose dissolution capacities, and toxicity profiles against Daphnia magna and E. coli strain 1A1. The latter organism has been engineered to produce isoprenol, a drop-in biofuel and precursor for commodity chemicals. Results The new N,N-diethyl and N,N-dipropyl methyl benzylammonium ILs were liquids at room temperature, showing 75–100 °C decreased melting points as compared to their N,N,N-trimethyl benzylammonium analog. Extension of N-alkyl chains also increased antibacterial activity threefold, while ionic liquids prepared from vanillin showed 2- to 4-fold lower toxicity as compared to those prepared from syringaldehyde and 4-methoxybenzaldehyde. The trend of antibacterial activity for anions of lignin-derived ILs was found to be methanesulfonate < acetate < hydroxide. Microcrystalline cellulose dissolution, from 2 to 4 wt% after 20 min at 100 °C, was observed in all new ILs using light microscopy and IR spectroscopy. Conclusions Ionic liquids prepared from H-, S- and G-lignin oxidation products provided differential cytotoxic activity against E. coli and D. magna, suggesting these compounds could be tailored for application specificity within a biorefinery.

Ionic Liquids in Analytical Chemistry: Applications and Recent Trends

2021 ◽  
Vol 17 ◽  
Author(s):  
Giuseppe Maria Merone ◽  
Angela Tartaglia ◽  
Enrica Rosato ◽  
Cristian D’Ovidio ◽  
Abuzar Kabir ◽  
...  
Keyword(s):  
Analytical Chemistry ◽  
Ionic Liquids ◽  
Stationary Phases ◽  
Extraction Procedure ◽  
Chemical Properties ◽  
Electrochemical Analysis ◽  
Physico Chemical ◽  
Recent Trends ◽  
Number Of Publications ◽  
Physical And Chemical

Background: Ionic liquids (ILs) are a unique class of compounds consisting exclusively of cations and anions that possess distinctive properties such as low volatility, high thermal stability, miscibility with water and organic solvents, electrolytic conductivity and non-flammability. Ionic liquids have been defined as "design solvents", because it is possible to modify their physical and chemical properties by appropriately choosing cations and anions, in order to meet the specific characteristics based on their potential application. Introduction: Due of their tunable nature and properties, ILs are considered as the perfect candidates for numerous applications in analytical chemistry including sample preparation, stationary phases in liquid or gas chromatography, additives in capillary electrophoresis, or in mass spectrometry for spectral and electrochemical analysis. In the last years, the number of publications regarding ILs has rapidly increased, highlighting the broad applications of these compounds in various fields of analytical chemistry. Results: This review first described the main physico-chemical characteristics of ionic liquids, and subsequently reported the various applications in different subdisciplines of analytical chemistry, including the extraction procedure and separation techniques. Furthermore, in each paragraph the most recent applications of ionic liquids in the food, environmental, biological, etc. fields have been described. Conclusion: Overall, the topic discussed highlights the key role of ionic liquids in analytical chemistry, giving hints for their future applications in chemistry but also in biology and medicine.

Substituent effects on cellulose dissolution in imidazolium-based ionic liquids

Cellulose ◽  
2018 ◽  
Vol 25 (12) ◽  
pp. 6887-6900 ◽  
Author(s):  
Niwanthi Dissanayake ◽  
Vidura D. Thalangamaarachchige ◽  
Shelby Troxell ◽  
Edward L. Quitevis ◽  
Noureddine Abidi
Keyword(s):  
Ionic Liquids ◽  
Substituent Effects ◽  
Cellulose Dissolution

scholarly journals Development of cellulose-based polymeric structures using dual functional ionic liquids

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39278-39286
Author(s):  
Joana Galamba ◽  
Vítor D. Alves ◽  
Noémi Jordão ◽  
Luísa A. Neves
Keyword(s):  
Ionic Liquids ◽  
Microcrystalline Cellulose ◽  
Cellulose Dissolution ◽  
Dual Functional ◽  
First Time ◽  
Polymeric Structures

Carboxylate ionic liquids combining benzethonium and didecyldimethylammonium as cations have been explored to be used for the first time as dual functional solvents for microcrystalline cellulose dissolution and, subsequently development of polymeric structures.

scholarly journals Insights into the levulinate-based ionic liquid class: synthesis, cellulose dissolution evaluation and ecotoxicity assessment

2019 ◽  
Vol 43 (33) ◽  
pp. 13010-13019 ◽  
Author(s):  
Andrea Mezzetta ◽  
Stefano Becherini ◽  
Carlo Pretti ◽  
Gianfranca Monni ◽  
Valentina Casu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Cellulose Dissolution

New levulinate ionic liquids (ILs) were able to dissolve cellulose in high amounts. The ecotoxicity profiles of these new ILs were also assessed.

scholarly journals Stability of cellulase in ionic liquids: correlations between enzyme activity and COSMO-RS descriptors

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jacob Nedergaard Pedersen ◽  
Bianca Pérez ◽  
Zheng Guo
Keyword(s):  
Hydrogen Bond ◽  
Enzyme Activity ◽  
Ionic Liquids ◽  
Bond Energy ◽  
Crucial Role ◽  
Enzymatic Saccharification ◽  
Cellulase Activity ◽  
Cellulose Dissolution ◽  
Ion Size ◽  
Selection Of

AbstractIonic liquids (ILs) are effective in pretreating cellulose for enhanced enzymatic saccharification, however ILs can inactivate cellulases. To guide the selection of ILs, the activity of cellulase was correlated with COSMO-RS calculations and descriptors of ILs including hydrogen bond (H-bond) basicity/acidity, polarity and ion size. Trends were deduced using an anion-series and a cation-series of ionic liquids in aqueous solutions. The activity in the cation-series was best correlated with the size of varied cations, whereas the activity in the anion-series showed a pronounced correlation to H-bond basicity and polarity of different anions. COSMO-RS was further used to predict the solubility of cellulose in ILs, which was correlated with cellulase activity on IL-pretreated cellulose. The best correlations were found between the enzyme activity in the anion-series ILs and the logarithmic activity coefficients, the H-bond energy, H-bond basicity and polarizability, underlining that the anion plays a crucial role in cellulose dissolution.

Distillable Acid-Base Conjugate Ionic Liquids for Cellulose Dissolution and Processing

2011 ◽  
Vol 123 (28) ◽  
pp. 6425-6429 ◽  
Author(s):  
Alistair W. T. King ◽  
Janne Asikkala ◽  
Ilpo Mutikainen ◽  
Paula Järvi ◽  
Ilkka Kilpeläinen
Keyword(s):  
Ionic Liquids ◽  
Cellulose Dissolution ◽  
Acid Base
Sign in / Sign up

Export Citation Format

Share Document