Interactions of Ionic Liquids with Polysaccharides – 7: Thermal Stability of Cellulose in Ionic Liquids and <i>N</i>‐Methylmorpholine‐<i>N</i>‐oxide

Dorn, Susann; Wendler, Frank; Meister, Frank; Heinze, Thomas

doi:10.1002/mame.200800153

Cited by 44 publications

(30 citation statements)

References 25 publications

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“…The thermal stability of a cellulose-IL system has been reported to be lower than the respective IL itself [116,117]. Moreover, the detailed mechanisms of cellulose depolymerization in ILs are still unclear.…”

Section: Thermal Degradation Of the Cellulose-il Systemmentioning

confidence: 98%

Ionic Liquids for the Production of Man-Made Cellulosic Fibers: Opportunities and Challenges

Hummel

Michud

Tanttu

et al. 2015

Advances in Polymer Science

132

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The constant worldwide increase in consumption of goods will also affect the textile market. The demand for cellulosic textile fibers is predicted to increase at such a rate that by 2030 there will be a considerable shortage, estimated at~15 million tons annually. Currently, man-made cellulosic fibers are produced commercially via the viscose and Lyocell™ processes. Ionic liquids (ILs) have been proposed as alternative solvents to circumvent certain problems associated with these existing processes. We first provide a comprehensive review of the progress in fiber spinning based on ILs over the last decade. A summary of the reports on the preparation of pure cellulosic and composite fibers is complemented by an overview of the rheological characteristics and thermal degradation of cellulose-IL solutions. In the second part, we present a non-imidazolium-based ionic liquid, 1,5-diazabicyclo[4.3.0]non-5-enium acetate, as an excellent solvent for cellulose fiber spinning. The use of moderate process temperatures in this process avoids the otherwise extensive cellulose degradation. The structural and morphological properties of the spun fibers are described, as determined by WAXS, birefringence, and SEM measurements. Mechanical properties are also reported. Further, the suitability of the spun fibers to produce yarns for various textile applications is discussed.

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Section: Thermal Degradation Of the Cellulose-il Systemmentioning

confidence: 98%

Ionic Liquids for the Production of Man-Made Cellulosic Fibers: Opportunities and Challenges

Hummel

Michud

Tanttu

et al. 2015

Advances in Polymer Science

132

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“…It is noteworthy that the viscosity of solutions varied enormously and was not proportional with that of the original solvent, although the same raw materials were used for preparing these solutions. Thus, it could be inferred that the variation of viscosity in this investigation might be due to the interaction between cellulose and solvent . During cellulose dissolution, the inter and intramolecular hydroxyl groups of cellulose are replaced either by hydrogen bonds or coordination bonds between the solvent and the hydroxyl groups of cellulose .…”

Section: Resultsmentioning

confidence: 82%

Regenerated Cellulose Fibers Prepared from Wheat Straw with Different Solvents

Chen

Guan

Wang

et al. 2015

Macro Materials & Eng

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Wheat straw cellulose (WSC) was simply isolated by delignification and hemicellulose‐removal processes, and then dissolved in five non‐derivatizing solvents, including N, N‐dimethylacetamide /lithium chloride, N‐methylmorpholine‐N‐oxide, 1‐butyl‐3‐methylimidazolium chloride, 1‐allyl‐3‐methylimidazolium chloride and 1‐ethyl‐3‐methylimidazolium acetate, to prepare regenerated cellulose fibers with wet spinning method. The results showed that WSC could be completely dissolved in all of the five solvents, and the chemical structure and thermal stability of the regenerated fibers were similar. However, the viscosity of the solutions, the morphology and mechanical strength of the fibers were highly depended on the type of the solvents.

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“…Besides other auxiliaries (e.g., carbon disulfide, sodium hydroxide, sulfuric acid, zinc sulfate), a significant volume of fresh water is required and amounts to approximately about 1 ton of water per kg of produced cellulosic fiber . Also, the cellulose concentration in solution is limited to a range of 8–10 wt%, which is critical with an eye on the environmental effects caused by the process …”

Section: Cellulose Fiber Spinning Using Il‐technologymentioning

confidence: 99%

Processing of Cellulose Using Ionic Liquids

Hermanutz

Vocht

Panzier

et al. 2018

Macro Materials & Eng

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The processing of cellulose dissolved in ionic liquids (ILs) enables the development of new materials. Besides the established production of cellulosic fiber products, interesting technical applications are developed like super micro filament fibers, cellulose/chitin blend fibers, precursors for carbon fibers, and all‐cellulose composites. This review provides a detailed summary of these new developments and describes how ILs are selected for the processing of cellulose with a particular emphasis on industrial realization. State‐of‐the‐art spinning processes are reviewed and it is illustrated how uniquely selected ILs can be used not only for established fiber spinning but for the development of new cellulose‐based materials.

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Interactions of Ionic Liquids with Polysaccharides – 7: Thermal Stability of Cellulose in Ionic Liquids and N‐Methylmorpholine‐N‐oxide

Cited by 44 publications

References 25 publications

Ionic Liquids for the Production of Man-Made Cellulosic Fibers: Opportunities and Challenges

Ionic Liquids for the Production of Man-Made Cellulosic Fibers: Opportunities and Challenges

Regenerated Cellulose Fibers Prepared from Wheat Straw with Different Solvents

Processing of Cellulose Using Ionic Liquids

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