Green and Inexpensive Choline‐Derived Solvents for Cellulose Decrystallization

Zhang, Qinghua; Benoit, Maud; Vigier, Karine De Oliveira; Barrault, J.; Jérôme, François

doi:10.1002/chem.201103271

Cited by 121 publications

(75 citation statements)

References 57 publications

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“…This indicates that the crystalline structure and chemical composition remained mostly unchanged by the ChCl/urea, which is in the agreement with previous studies (Zhang et al 2012b;de Olivieira Vigier and Jerome 2014). In addition, no new peaks were observed, which indicates a lack of degradation products.…”

Section: Effect Of Chcl/urea On Pulp Propertiessupporting

confidence: 93%

Method for Forming Pulp Fibre Yarns Developed by a Design-driven Process

Tenhunen¹,

Hakalahti²,

Kouko³

et al. 2016

BioResources

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A simple and inexpensive method for producing water-stable pulp fibre yarns using a deep eutectic mixture composed of choline chloride and urea (ChCl/urea) was developed in this work. Deep eutectic solvents (DESs) are eutectic mixtures consisting of two or more components that together have a lower melting point than the individual components. DESs have been previously studied with respect to cellulose dissolution, functionalisation, and pre-treatment. This new method uses a mixture of choline chloride and urea, which is used as a swelling and dispersing agent for the pulp fibres in the yarn-forming process. Although the pulp seemed to form a gel when dispersed in ChCl/urea, the ultrastructure of the pulp was not affected. To enable water stability, pulp fibres were crosslinked by esterification using polyacrylic acid. ChCl/urea could be easily recycled and reused by distillation. The novel process described in this study enables utilisation of pulp fibres in textile production without modification or dissolution and shortening of the textile value chain. An interdisciplinary approach was used, where potential applications were explored simultaneously with material development from process development to the early phase prototyping.

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Section: Effect Of Chcl/urea On Pulp Propertiessupporting

confidence: 93%

Method for Forming Pulp Fibre Yarns Developed by a Design-driven Process

Tenhunen¹,

Hakalahti²,

Kouko³

et al. 2016

BioResources

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“…The aprotic co-solvents dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF), and N,N-dimethylacetamide (DMA) had negligible solubilization to ChCl-Im. The QASs (surfactants) showed better solubilization to ChCl-Im, which was in agreement with a previous report (Zhang et al 2012b). The solubility of cellulose was increased from 2.48 wt.% to 3.12 wt.%, 2.69 wt.%, and 3.80 wt.%, respectively, with the addition of tetrabutylammonium bromide (TBAB), tetraethylammonium bromide (TEAB), and tributylmethylammonium chloride ([TBMA]Cl), respectively.…”

Section: Solubilization Of Co-solventssupporting

confidence: 91%

The Properties of Choline Chloride-based Deep Eutectic Solvents and their Performance in the Dissolution of Cellulose

et al. 2016

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A series of choline chloride-based deep eutectic solvents (ChCl-DESs) were synthesized and characterized, and their performance in the dissolution of cellulose was investigated. The hydrogen-bond donors significantly (β-value) affected the properties of ChCl-DESs, causing differentiated dissolution performances. ChCl-imidazole (Im) showed the highest Hammett acidity function (1.869), hydrogen bond basicity (0.864), and dipolarity/polarizability effect (0.382) among the ChCl-DESs. The ChCl-Im showed the lowest pseudo-activation energy for viscous flow (31.76 kJ mol -1 ) among the ChCl-DESs. The properties of ChCl-Im caused the highest solubility of cellulose (2.48 wt.%) relative to the other ChClDESs. Polyethylene glycol (PEG), as a co-solvent, significantly (β-value) enhanced the accessibility of ChCl-Im to cellulose by breaking the supramolecular structure of cellulose, promoting its dissolution. The decrystallization of ChCl-Im-coupled PEG approximately doubled the dissolving capabilities, and the solubility increased by more than 80% in comparison with only ChCl-Im. The cellulose was directly dissolved by ChCl-Im-coupled PEG, and no other derivatives were produced.

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“…Therefore, the crystallinity index, CrI, of a sample is useful parameter to assess the efficiency of hydrolysis [6,7]. This crystallinity index (CrI), is a measure of the relative degree of crystallinity, which can be determined through the use of X-ray diffraction (XRD) using the relationship as stated by Segal et al, [8] in the following equation (1):…”

Section: Methodsmentioning

confidence: 99%

Effect of structural changes of lignocelluloses material upon pre-treatment using green solvents

Gunny

Arbain

Jamal

2017

AIP Conference Proceedings

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ARTICLES YOU MAY BE INTERESTED INAbstract. The Malaysia Biomass strategy 2020 stated that the key step of biofuel production from biomass lies on the pretreatment process. Conventional 'pre-treatment' methods are 'non-green" and costly. The recent green and cost-effective biomass pretreatment is using new generation of Ionic Liquids also known as Deep Eutectic Solvents (DESs). DESs are made of renewable components are cheaper, greener and the process synthesis are easier. Thus, the present paper concerns with the preparation of various combination of DES and to study the effect of DESs pretreatment process on microcrystalline cellulose (MCC), a model substrate. The crystalline structural changes were studied using using X-ray Diffraction Methods, Fourier Transformed Infrared Spectroscopy (FTIR) and surface area and pore size analysis. Results showed reduction of crystalline structure of MCC treated with the DESs and increment of surface area and pore size of MCC after pre-treatment process. These results indicated the DES has successfully converted the lignocelluloses material in the form suitable for hydrolysis and conversion to simple sugar.

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Green and Inexpensive Choline‐Derived Solvents for Cellulose Decrystallization

Cited by 121 publications

References 57 publications

Method for Forming Pulp Fibre Yarns Developed by a Design-driven Process

Method for Forming Pulp Fibre Yarns Developed by a Design-driven Process

The Properties of Choline Chloride-based Deep Eutectic Solvents and their Performance in the Dissolution of Cellulose

Effect of structural changes of lignocelluloses material upon pre-treatment using green solvents

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