Ionic Liquids and Cellulose: Dissolution, Chemical Modification and Preparation of New Cellulosic Materials

Işık, Mehmet; Sardón, Haritz; Mecerreyes, David

doi:10.3390/ijms150711922

Cited by 367 publications

(231 citation statements)

References 85 publications

(91 reference statements)

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“…Finally, the cellulose dissolves [47]. This new cellulose material can be applied to the preparation of cellulose composites for thin films or beads in bioassays and supported reaction media, cellulose-based ion gel in fuel cells, biosensors and separation membranes, and electrospinning cellulosic fibres for biomedical applications [49].…”

Section: Cellulose Derivativesmentioning

confidence: 99%

Biodegradable polymer films from seaweed polysaccharides: A review on cellulose as a reinforcement material

Khalil¹,

Tye²,

Saurabh³

et al. 2017

Express Polym. Lett.

182

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Section: Cellulose Derivativesmentioning

confidence: 99%

Biodegradable polymer films from seaweed polysaccharides: A review on cellulose as a reinforcement material

Khalil¹,

Tye²,

Saurabh³

et al. 2017

Express Polym. Lett.

182

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“…A number of works, including several reviews [76][77][78][79][80][81][82], have been already published on the cellulose dissolution process in ILs. Thus, this subject will not be discussed in depth in this review.…”

Section: Mechanism Of Cellulose Dissolutionmentioning

confidence: 99%

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

et al. 2017

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Abstract:The most frequent polymer on nature is cellulose that is present together with lignin and hemicellulose in vegetal biomass. Cellulose can be, in the future, sustainable raw matter for chemicals, fuels, and materials. Nevertheless, only 0.3% of cellulose is processed nowadays due to the difficulty in dissolving it, and only a small proportion is used for the production of synthetic cellulosic fibers especially esters and other cellulose derivatives, normally in extremely polluting processes. The efficient and clean dissolution of cellulose is a major objective in cellulose research and development. Ionic liquids (ILs) are considered "green" solvents due to their low vapor pressure, that prevents them evaporating into the atmosphere. In addition, these molten salts present advantages in process intensification, leading to more than 70 patents in lignocellulosic biomass in ILs being published since 2005, most of them related to the production of cellulose derived polymers, e.g., acetates, benzoylates, sulfates, fuorates, phthalates, succinates, tritylates, or silylates. In this work, the use of ILs for production of cellulose derived polymers is thoroughly studied. To do so, in the first place, a brief summary of the state of the art in cellulose derivatives production is presented, as well as the main features of ILs in cellulose processing applications. Later, the main results in the production of cellulose derivatives using ILs are presented, followed by an analysis of the industrial viability of the process, considering aspects such as environmental concerns and ILs' recyclability.

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“…Those with shorter anion and cation alkyl chain length are considered to be of lower toxicity (Ruokonen et al 2016;Witos et al 2017). This also corresponds with the better capability to dissolve cellulose as cellulose dissolution capability typically decreases as cation or anion volume gets too large (Isik et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Homogenous esterification of cellulose pulp in [DBNH][OAc]

2017

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Cellulose acetate is widely used in films, filters, textiles, lacquer and cosmetic products. Herein we demonstrate the production of cellulose esters under homogeneous conditions using 1,5-diazabicyclo[4.3.0]non-5-ene acetate ([DBNH][OAc]) as solvent. The reagents have been chosen such that the system is recyclable, i.e. by-products are low boiling and easy to remove. It is demonstrated that cellulose acetate can be synthesized with different degree of substitution (DS) values, and that some commonly used acylation regents, like vinyl carboxylates react well without additional base catalyst. Low to high DS values are possible with good recovery of high purity ionic liquid (IL). A linear correlation method of two separate methods, IR and 31 P NMR, is proposed to reliably assess the DS of the products. The recyclability of the solvent is demonstrated by acetylating cellulose with isopropenyl acetate to high degree and regeneration into water. After regeneration of cellulose acetate from the IL with addition of water, the residual water was entrained using n-butanol to minimize hydrolysis of [DBNH][OAc], to allow for high recovery and high purity of the ionic liquid. Thus, an overall scheme for batch cellulose acetylation and recovery of [DBNH][OAc] from aqueous solutions is proposed.

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Ionic Liquids and Cellulose: Dissolution, Chemical Modification and Preparation of New Cellulosic Materials

Cited by 367 publications

References 85 publications

Biodegradable polymer films from seaweed polysaccharides: A review on cellulose as a reinforcement material

Biodegradable polymer films from seaweed polysaccharides: A review on cellulose as a reinforcement material

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

Homogenous esterification of cellulose pulp in [DBNH][OAc]

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