Influence of water on phase transition and rheological behavior of cellulose/ionic liquid/water ternary systems

Lee, Young Jae; Kwon, Minji; Lee, Sung Jun; Jeong, Sang Won; Kim, Hyun-Chul; Oh, Tae Hwan; Lee, Se Geun

doi:10.1002/app.44658

Cited by 25 publications

(11 citation statements)

References 59 publications

(116 reference statements)

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“…Influence of water content on the complex viscosity of 14 wt % MCC/[C 2 C 1 im][Ac]/water systems. Formation of self-associated LC network of cellulose in IL with no or little water [Adapted with permission from ref . Copyright 2016.…”

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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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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“…Both are related to the processing properties of the blended solution. In a certain shear frequency range (0.1 Hz < f < 100 Hz), as the shear frequency increased, both the storage modulus and the loss modulus increased, with a crossing point at a certain shear frequency, namely, the gel point (Lee et al 2017). Table 5 lists the G′-G″ crossing point (Gc) and crossing point frequency (fc) values of the pure BP solution and the BP/CS blend solutions at different temperatures.…”

Section: Crossing Point (Gc) and Crossing Point Frequency (Fc) Of Bp/cs Blend Solutionsmentioning

confidence: 99%

Effect of chitosan on membrane formation and processability of bamboo dissolving pulp based ultrafiltration membrane

Yuan

Lin

et al. 2021

BioRes

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Bamboo dissolving pulp (BP)/chitosan (CS) blend solutions were obtained by adding different weight ratios of BP and CS particles to N-methyl-morpholine-N-oxide (NMMO) solvent. The processing and membrane-forming performances of the blend solutions were studied using a rotating rheometer. The BP/CS blend solutions’ optimal processing temperature was 50 to 70 °C. When the CS weight ratio was 9.09 wt%, the viscosity of the solution decreased, which was conducive to the processing of the membrane. The BP/CS blend ultrafiltration membranes were prepared by phase transformation of the blend solutions. The results showed that the rejection rate of the BP/CS blend ultrafiltration membrane with physically added CS particles was greatly improved compared with that of the regenerated BP ultrafiltration membrane.

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“…Fendt et al have shown that the addition of 5% (w/w) of water or organic solvents (acetonitrile and ethylene glycol) to [EMIM][OAc] and [BMIM][OAc] decreased their viscosity by 50% [72]. Many reports showed that the presence of water decreased the solubility of cellulose in ionic liquids because the water supports the reformation of hydrogen bonding of cellulose and affects the cation/anion interactions [23,[73][74][75]. Similar behavior was reported for some organic solvents [76].…”

Section: Impact Of the Addition Of Water Organic Solvents And Saltsmentioning

confidence: 99%

A Review on the Partial and Complete Dissolution and Fractionation of Wood and Lignocelluloses Using Imidazolium Ionic Liquids

Abushammala

Mao

2020

Polymers

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Ionic liquids have shown great potential in the last two decades as solvents, catalysts, reaction media, additives, lubricants, and in many applications such as electrochemical systems, hydrometallurgy, chromatography, CO2 capture, etc. As solvents, the unlimited combinations of cations and anions have given ionic liquids a remarkably wide range of solvation power covering a variety of organic and inorganic materials. Ionic liquids are also considered “green” solvents due to their negligible vapor pressure, which means no emission of volatile organic compounds. Due to these interesting properties, ionic liquids have been explored as promising solvents for the dissolution and fractionation of wood and cellulose for biofuel production, pulping, extraction of nanocellulose, and for processing all-wood and all-cellulose composites. This review describes, at first, the potential of ionic liquids and the impact of the cation/anion combination on their physiochemical properties and on their solvation power and selectivity to wood polymers. It also elaborates on how the dissolution conditions influence these parameters. It then discusses the different approaches, which are followed for the homogeneous and heterogeneous dissolution and fractionation of wood and cellulose using ionic liquids and categorize them based on the target application. It finally highlights the challenges of using ionic liquids for wood and cellulose dissolution and processing, including side reactions, viscosity, recyclability, and price.

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Influence of water on phase transition and rheological behavior of cellulose/ionic liquid/water ternary systems

Cited by 25 publications

References 59 publications

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

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

Effect of chitosan on membrane formation and processability of bamboo dissolving pulp based ultrafiltration membrane

A Review on the Partial and Complete Dissolution and Fractionation of Wood and Lignocelluloses Using Imidazolium Ionic Liquids

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