Influence of molar mass distribution on the final properties of fibers regenerated from cellulose dissolved in ionic liquid by dry-jet wet spinning

Michud, Anne; Hummel, Michael; Sixta, Herbert

doi:10.1016/j.polymer.2015.08.017

Cited by 80 publications

(106 citation statements)

References 28 publications

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“…The zero shear viscosity is sensitivet ot he polymer concentration and molecular weighto ft he cellulose solutes.T he distinct influence of the temperature is illustrated explicitly in Figure 2f or the solutiono f7 %C oW 750. [36,[43][44][45] The values of the complex moduli and the angular frequency of the COP of nonspinnable dopes also showed ad istinct deviation from the values of the spinnables olutions as shown in Figures 1a nd 2. In other words, ahighertemperature facilitates the flow of the cellulose chains in the solution,w hich weakenst heir entangled structure.…”

Section: Dry-jet Wets Pinning and Spinnability Of The Cellulose Solutmentioning

confidence: 84%

“…[36] According to previous studies, [46] the addition of as mall amount of high-molecular-weight polymer increases the resistance to flow of the solution in extension significantly.T his propertyi nf luids will lead to ab etter spinnability,w hich meanst he prevention of filamentb reaks upon extrusion throughaspinneret. [36] According to previous studies, [46] the addition of as mall amount of high-molecular-weight polymer increases the resistance to flow of the solution in extension significantly.T his propertyi nf luids will lead to ab etter spinnability,w hich meanst he prevention of filamentb reaks upon extrusion throughaspinneret.…”

Section: Dry-jet Wets Pinning and Spinnability Of The Cellulose Solutmentioning

confidence: 89%

“…[24][25][26][27][28] Preliminary investigations also indicated that ILs can dissolve cellulose selectively from ab lend of cotton with polyester or Nylon. [36] Therefore, the viscosity adjustment of the heterogeneous raw material is mandatory for as uccessful spinning process. [31] The next concern with these ILs is the severe degradation of cellulose, especially at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Renewable High‐Performance Fibers from the Chemical Recycling of Cotton Waste Utilizing an Ionic Liquid

et al. 2016

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A new chemical recycling method for waste cotton is presented that allows the production of virgin textile fibers of substantially higher quality than that from the mechanical recycling methods that are used currently. Cotton postconsumer textile wastes were solubilized fully in the cellulose-dissolving ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) to be processed into continuous filaments. As a result of the heterogeneous raw material that had a different molar mass distribution and degree of polymerization, pretreatment to adjust the cellulose degree of polymerization by acid hydrolysis, enzyme hydrolysis, or blending the waste cotton with birch prehydrolyzed kraft pulp was necessary to ensure spinnability. The physical properties of the spun fibers and the effect of the processing parameters on the ultrastructural changes of the fibers were measured. Fibers with a tenacity (tensile strength) of up to 58 cN tex (870 MPa) were prepared, which exceeds that of native cotton and commercial man-made cellulosic fibers.

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Section: Dry-jet Wets Pinning and Spinnability Of The Cellulose Solutmentioning

confidence: 84%

Section: Dry-jet Wets Pinning and Spinnability Of The Cellulose Solutmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Renewable High‐Performance Fibers from the Chemical Recycling of Cotton Waste Utilizing an Ionic Liquid

et al. 2016

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“…Michud and coworkers [209] produced regenerated cellulose fibers by dry-jet spinning from cellulose/[DBNH]OAc solutions to study the influence of cellulose molecular structure on the spinnability and the mechanical properties of the resulting fibers. The solutions were extruded through a multi-hole spinneret (36 holes, diameter of 100 µm, and capillary length of 20 µm) via 1 cm air gap into a cold (10-15 • C) aqueous coagulation bath at a constant extrusion velocity of 16 cm 3 /min.…”

Section: Cellulose Precipitationmentioning

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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“…Chemically, ionic liquids are made of an organic cation and smaller, organic or inorganic anion [5], and the most interesting are the properties of room temperature ionic liquids (RTILs) [9]. The ability to dissolve cellulose in ionic liquids allows for a relatively simple processing of this polymer to obtain fibers [10][11][12][13][14][15][16], nanofibers [17][18][19] cellulose particles [20], cellulose gels and aerogels [21][22][23][24], flocs [25] and membranes.…”

Section: Introductionmentioning

confidence: 99%

Properties and Structure of Cellulosic Membranes Obtained from Solutions in Ionic Liquids Coagulated in Primary Alcohols

Fryczkowska

Kowalska

Biniaś

et al. 2018

Autex Research Journal

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This paper presents the results of studies on the preparation of cellulosic membranes, from a solution in 1-ethyl-3- methylimidazolium acetate (EMIMAc), using the phase inversion method. Initially, the membranes were obtained by coagulation of the polymer film in water and primary alcohols (methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol), 1-hexanol, 1-octanol) resulting in membranes with significantly differing morphologies. Subsequently, composite membranes were produced, with the support layer being a membrane with the largest pores, and the skin layer a membrane with smaller pores. The resulting membranes were tested for physicochemical and transport properties. The morphology of the membrane surfaces and their cross-sections were investigated by using a scanning electron microscope (SEM). The structure of the membranes, on the other hand, was investigated by FTIR spectroscopy and WAXS structural analysis.

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Influence of molar mass distribution on the final properties of fibers regenerated from cellulose dissolved in ionic liquid by dry-jet wet spinning

Cited by 80 publications

References 28 publications

Renewable High‐Performance Fibers from the Chemical Recycling of Cotton Waste Utilizing an Ionic Liquid

Renewable High‐Performance Fibers from the Chemical Recycling of Cotton Waste Utilizing an Ionic Liquid

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

Properties and Structure of Cellulosic Membranes Obtained from Solutions in Ionic Liquids Coagulated in Primary Alcohols

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