Rheology of 1‐butyl‐3‐methylimidazolium chloride cellulose solutions. III. Elongational rheology

Sammons, Rhea J.; Collier, J. R.; Rials, Timothy G.; Petrovan, S.

doi:10.1002/app.28928

Cited by 13 publications

(11 citation statements)

References 21 publications

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“…Only two studies are available on the elongational rheology of cellulose-IL solutions. Sammons et al used a capillary extrusion rheometer with hyperbolic dies of Hencky strains of 5, 6, and 7 [49]. The tested cellulose-[bmim]Cl 2a solutions exhibited strain hardening and strain rate thinning.…”

Section: Rheology Of Cellulose-il Solutionsmentioning

confidence: 97%

“…Recently, Sammons et al suggested the use of semi-hyperbolically converging dies to spin a pulp-[bmim]Cl 2a solution [83]. The dies were the same as used in their study of the elongational rheology (vide supra) and are claimed to extrude the spinning dope shear-free [49]. The authors defined an orientation number as the product of the characteristic elongational relaxation time, the Hencky strain, and the elongational strain rate.…”

Section: Fiber Spinningmentioning

confidence: 97%

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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: Rheology Of Cellulose-il Solutionsmentioning

confidence: 97%

Section: Fiber Spinningmentioning

confidence: 97%

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

Hummel

Michud

Tanttu

et al. 2015

Advances in Polymer Science

132

View full text Add to dashboard Cite

show abstract

“…Sammons et al reported the elongational rheology of IL/cellulose solutions using a capillary rheometer with hyperbolic dies . The results revealed the shear thinning and strain hardening behaviors of the considered solution.…”

Section: Rheology Of Il Based Solutionsmentioning

confidence: 99%

Rheology of Pure Ionic Liquids and Their Complex Fluids: A Review

Shakeel

Mahmood

Farooq

et al. 2019

ACS Sustainable Chem. Eng.

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Ionic liquids (ILs) are liquid salts at ambient or lower temperatures and consist of ions and short-lived ion pairs. They are potential alternatives to toxic, hazardous, highly flammable, and volatile solvents for preparing solutions, dispersions, gels, composites, and polymeric melts. ILs have some very interesting and unique characteristics like good chemical and thermal stability and very low vapor pressures. They have good solvation interactions with a wide range of organic, inorganic, and polymeric compounds. They can enhance colloidal stability and the elasticity range of polymers. ILs are environmental friendly, easily recyclable, and structurally similar to the conventional solvents. For optimal performance, it is necessary to fully understand the rheological properties of ILs and their different systems for academic interests such as understanding the ability of ILs as processing aids particularly in film casting, fiber spinning and spraying, comprehension of thermodynamics and dynamics of polymer chains in ILs, analyzing the hydrodynamic volume of dispersed polymer, polymer–ILs interactions, characterizing the viscoelastic properties and nanophase–ILs interactions in nanocomposite systems, analyzing the plasticization efficiency, and the final properties of the composite system. The rheological analysis is also important for industrial purposes particularly for designing processing techniques and suitable operating conditions for IL based systems. The aim of this review is to give an overview of the rheological properties of pure ionic liquids and solutions, dispersions, gels, composites, and melts based on ionic liquids.

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“…There have been many reports in the literature of the solubilities and rheological properties of the cellulose solution in ionic liquids, but few about the spinning process and especially about the wet spinning process of cellulose/[EMIM]Ac solution . By wet spinning of cellulose from [EMIM]Ac into hot water without drawing, Olsson and Westman prepared fibers of different mechanical qualities, and showed that both tenacity and stiffness increased steeply with increased degree of polymerization of the polymers.…”

Section: Introductionmentioning

confidence: 99%

Cellulose fibers from cellulose/1‐ethyl‐3‐methylimidazolium acetate solution by wet spinning with increasing spinning speeds

et al. 2013

J of Applied Polymer Sci

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Cellulose fibers from cellulose/1-ethyl-3-methylimidazolium acetate solution were prepared by wet spinning with increasing extrusion speeds and draw ratios. The effects of spinning speeds on the structures and mechanical properties of these fibers were investigated by using scanning electron microscopy, wide angle X-ray diffraction, birefringence, thermogravimetric analysis, tensilefineness tester, and wet friction. The results showed that the crystallinity, orientation, and mechanical properties of the fibers were improved with increasing draw ratio. The break draw ratios, degrees of crystallinity and orientation, tenacities, and wet friction time of the cellulose fibers decreased with increasing extruding speeds. The wet friction time decreased with increasing draw ratio and decreased faster under higher extrusion speed. Due to the high dope concentration and the increased draw ratio, the maximum tenacity of the regenerated cellulose fibers reached 2.73 cN/dtex. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40225.

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Rheology of 1‐butyl‐3‐methylimidazolium chloride cellulose solutions. III. Elongational rheology

Cited by 13 publications

References 21 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

Rheology of Pure Ionic Liquids and Their Complex Fluids: A Review

Cellulose fibers from cellulose/1‐ethyl‐3‐methylimidazolium acetate solution by wet spinning with increasing spinning speeds

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