Preparation of cellulosic soft and composite materials using ionic liquid media and ion gels

Takada, Akihiko; Kadokawa, Jun‐ichi

doi:10.1007/s10570-021-04215-9

Cited by 9 publications

(7 citation statements)

References 49 publications

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“…Preparation of polysaccharide ion gels with ionic liquids was comprehensively presented [ 203 , 204 , 205 , 206 , 207 ]. The method involved dissolution of polysaccharides derived from different type substrates (including cellulose) with ionic liquids, mainly 1-butyl-3-methylimidazolium chloride ([BMIM][Cl]).…”

Section: Cellulose-based Gelsmentioning

confidence: 99%

Insights on Some Polysaccharide Gel Type Materials and Their Structural Peculiarities

Duceac¹,

Stanciu²,

Nechifor³

et al. 2022

Gels

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Global resources have to be used in responsible ways to ensure the world’s future need for advanced materials. Ecologically friendly functional materials based on biopolymers can be successfully obtained from renewable resources, and the most prominent example is cellulose, the well-known most abundant polysaccharide which is usually isolated from highly available biomass (wood and wooden waste, annual plants, cotton, etc.). Many other polysaccharides originating from various natural resources (plants, insects, algae, bacteria) proved to be valuable and versatile starting biopolymers for a wide array of materials with tunable properties, able to respond to different societal demands. Polysaccharides properties vary depending on various factors (origin, harvesting, storage and transportation, strategy of further modification), but they can be processed into materials with high added value, as in the case of gels. Modern approaches have been employed to prepare (e.g., the use of ionic liquids as “green solvents”) and characterize (NMR and FTIR spectroscopy, X ray diffraction spectrometry, DSC, electronic and atomic force microscopy, optical rotation, circular dichroism, rheological investigations, computer modelling and optimization) polysaccharide gels. In the present paper, some of the most widely used polysaccharide gels will be briefly reviewed with emphasis on their structural peculiarities under various conditions.

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Section: Cellulose-based Gelsmentioning

confidence: 99%

Insights on Some Polysaccharide Gel Type Materials and Their Structural Peculiarities

Duceac¹,

Stanciu²,

Nechifor³

et al. 2022

Gels

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“…The ion gel is prepared by removing solvents in the surface of samples and preserving inner solvents, which usually exhibits high flexibility. [135,136] The hydrogen gel usually requires a complete removal of solvents through exchanging water repeatedly. [137][138][139][140] cellulose films or aerogels could be obtained using different drying methods.…”

Section: Casting To Prepare Filmsmentioning

confidence: 99%

Progress, Challenge, and Perspective of Fabricating Cellulose

Qiao

Wang

et al. 2022

Macromol. Rapid Commun.

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Cellulose as the most abundant biopolymers on Earth, presents appealing performance in mechanical properties, thermal management, and versatile functionalization. Developing fabrication methods to design functional materials and open new application areas. However, cellulose is hard to be dissolved or melt due to its recalcitrant property. Herein, the recent progress of fabricating cellulose is summarized. First, the unique hierarchical structure of cellulose is fully investigated and the resulted processability is analysed in directions of down to nanocellulose, dissolution, and thermoplastic processing. Then, the reported fabrication methods are summarized in three aspects: (1) self‐assembly from nano/micro cellulose suspensions, especially the formation of cellulose nanocrystals; (2) dissolution–regeneration–drying, covering spinning and solvent infusion processing; and (3) thermoplastic processing, focusing on the setup and the morphology changes of the prepared products. In each aspect, the flowchart of the fabrication method, the mechanism, fabricated products, and effects of processing parameters are explored. Finally, this review provides a perspective on the further direction of fabricating cellulose, especially the challenges toward mass production.

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“…Regarding wet processing of cellulose, several imidazolium‐based ionic liquids (IL) proved to be efficient solvents for cellulose 10 . At higher cellulose concentrations, so called ionogels have shown potential in medicine, energy storage, or electrochemistry 11 as well as composite materials 12 . In this context, the influence of ILs has been investigated not only for cellulose, but also for other polymer composites 13 .…”

Section: Introductionmentioning

confidence: 99%

“…10 At higher cellulose concentrations, so called ionogels have shown potential in medicine, energy storage, or electrochemistry 11 as well as composite materials. 12 In this context, the influence of ILs has been investigated not only for cellulose, but also for other polymer composites. 13 Recently, cellulose films via the solution-precipitation method were produced with different contents of residual IL.…”

Section: Introductionmentioning

confidence: 99%

Cellulose blends from gel extrusion and compounding with polylactic acid

Müller

Fürtauer

Schmid

et al. 2022

J of Applied Polymer Sci

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Cellulose, dissolved in ionic liquids (IL), can be used successfully in the processing of thermoplastics. To recover the ionic liquid while maintaining the thermoplastic properties, other spacers than IL might be introduced into the cellulose network. Such blend materials have been prepared before by solution blending as reported in the literature. In this study, the preparation and investigation of cellulose and polylactic acid (PLA) blends using an extrusion process with an ionic liquid and co‐solvent for intermediate compatibilization is reported. The obtained transparent films show a homogeneous morphology without phase separation. Thermal analysis showed no separated glass transition for PLA, and FTIR showed hydrogen bonding between cellulose and PLA chains. Thermal stability of the blends with a degradation onset around 270°C lies between regenerated cellulose and pure PLA. The blend tensile strength and elongation of ~40 MPa and 1.3%, respectively, were comparable to a multiphase composite containing twice the molecular weight of PLA. Generally, mechanical performance of the blends was strongly influenced by degradation reactions mainly caused by the ionic liquid used, as well as blend morphology. The study shows that transfer from solution to extrusion processing is generally possible to obtain novel cellulose blends.

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Preparation of cellulosic soft and composite materials using ionic liquid media and ion gels

Cited by 9 publications

References 49 publications

Insights on Some Polysaccharide Gel Type Materials and Their Structural Peculiarities

Insights on Some Polysaccharide Gel Type Materials and Their Structural Peculiarities

Progress, Challenge, and Perspective of Fabricating Cellulose

Cellulose blends from gel extrusion and compounding with polylactic acid

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