Dissolution of cellulose in novel carboxylate-based ionic liquids and dimethyl sulfoxide mixed solvents

Kasprzak, Dawid; Krystkowiak, Ewa; Stępniak, Izabela; Galiński, Maciej

doi:10.1016/j.eurpolymj.2019.01.053

Cited by 45 publications

(22 citation statements)

References 57 publications

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“…The solutions (TMGH + + carboxylate anion + cellulose) exhibited a very high viscosity and to reduce it, DMSO, a polar aprotic co-solvent was added. This co-solvent accelerates mass transfer and diffusion and solvates the ionic liquid, forming more free ions and promoting the interaction with hydrogen bonds of cellulose [ 27 ]. The results are presented in Table 1 .…”

Section: Resultsmentioning

confidence: 99%

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

et al. 2021

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Due to environmental concerns, more attention has been given to the development of bio-based materials for substitution of fossil-based ones. Moreover, paper use is essential in daily routine and several applications of industrial pulp can be developed. In this study, transparent films were produced by industrial cellulose pulp solubilization in tetramethylguanidine based ionic liquids followed by its regeneration. Films were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), UV/Vis spectroscopy, proton nuclear magnetic resonance (1H-NMR), dynamic scanning calorimetry (DSC), thermal analysis (TG), and X-ray diffraction (XRD). Mechanical tests showed that films have a good elongation property, up to 50%, depending on ionic liquid incorporation. The influence of the conjugated acid and dissolution temperature on mechanical properties were evaluated. These results revealed the potential of this methodology for the preparation of new biobased films.

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Section: Resultsmentioning

confidence: 99%

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

et al. 2021

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“…With ionic liquid/dimethyl sulfoxide as the solvent at 80°C, the solubility of microcrystalline cellulose was improved by up to 13.5%. [ 33 ] In another study, a 13.5% improvement in the solubility of cellulose extracted from kenaf was observed after hydrothermal pretreatment. [ 34 ] Therefore, ozone treatment is effective for improving the cellulose solubility.…”

Section: Resultsmentioning

confidence: 99%

Ozone treatment for improving the solubility of cellulose extracted from palm fiber

Pujokaroni

Ohtani

Ichiura

2020

J of Applied Polymer Sci

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We investigated effects of ozone treatment on solubility of cellulose and chemical composition in cellulose extracted from palm fiber. The initial holocellulose, α-cellulose, and lignin contents of the extracted cellulose were 88.0, 81.9, and 8.75%, respectively. The extracted cellulose was treated with ozone and NaOH solution. Ozone treatment for 5 hr at 40 C using 3% citric acid decreased the lignin content from 8.75 to 2.71%. Under these conditions, the degree of polymerization (DP) of the cellulose decreased to 29 from 160 and the carboxyl content increased to 2.05 mmol/g. When the solid phase was treated with NaOH after ozone treatment, the mass of the solid phase decreased as the ozone treatment time increased. The lowest mass was 0.43 g. Additionally, the mass of cellulose regenerated from the liquid phase increased with increasing treatment time. The highest mass of regenerated cellulose was 0.54 g. The masses of the solid phase and regenerated cellulose obtained without ozone treatment under the same conditions were 0.76 and 0.18 g, respectively. These results suggest that ozone treatment improves the solubility of cellulose by converting hydroxyl groups in the cellulose to carboxyl groups and reducing the DP.

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“…The cellulose solution in IL/DMSO solvent mixture was prepared according to the method described previously [16]. Firstly, a certain amount of cellulose powder was added to a glass vial that contained 3 g of DMSO.…”

Section: Preparation Of Biopolymer Solutionsmentioning

confidence: 99%

“…From among proposed ideas, the processing of biopolymers in ionic liquid-based solvents has attracted the greatest interest [15][16][17][18]. It has been proven that ionic liquids (ILs, organic salts which are in a liquid state below 100 °C) show high efficiency in the dissolution of cellulose or chitin and are moreover eco-friendly and recyclable.…”

Section: Introductionmentioning

confidence: 99%

Chitin and chitin-cellulose composite hydrogels prepared by ionic liquid-based process as the novel electrolytes for electrochemical capacitors

Kasprzak

Galiński

2021

J Solid State Electrochem

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This paper reports on the preparation and electrochemical performance of chitin- and chitin-cellulose-based hydrogel electrolytes. The materials were prepared by a casting solution technique using ionic liquid-based solvents. The method of chitin dissolution in ionic liquid with the assistance of dimethyl sulfoxide co-solvent was investigated. The obtained membranes were soaked with 1-M lithium sulfate aqueous solution. The prepared materials were preliminarily characterized in terms of structural and physicochemical properties. Further, the most promising biopolymer membranes were assembled with activated carbon cloth electrodes in symmetric electrochemical capacitor cells. The electrochemical performances of these devices were studied in a 2-electrode system by commonly known electrochemical techniques, such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The devices operated at a maximum voltage of 0.8 V. All the investigated materials have shown high efficiency in terms of specific capacitance, power density, and cyclability. The studied capacitors exhibited specific capacitance values in the range of 92–98 F g−1, with excellent capacitance retention (ca. 97–98%) after 20,000 galvanostatic charge and discharge cycles. Taking into account the above information and the eco-friendly nature of the biopolymer, it appears that the prepared chitin- and chitin-cellulose-based hydrogel electrolytes can be promising components for green electrochemical capacitors.

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Dissolution of cellulose in novel carboxylate-based ionic liquids and dimethyl sulfoxide mixed solvents

Cited by 45 publications

References 57 publications

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

Ozone treatment for improving the solubility of cellulose extracted from palm fiber

Chitin and chitin-cellulose composite hydrogels prepared by ionic liquid-based process as the novel electrolytes for electrochemical capacitors

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