Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Tan, Xiaoyan; Li, Xiaoxi; Chen, Ling; Xie, Fengwei

doi:10.1039/c6cp04426c

Cited by 60 publications

(45 citation statements)

References 47 publications

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“…The crystallites of MCC could be completely damaged during dissolution, which was caused by the cleavage of the inter-and intra-molecular hydrogen bonds in MCC [16]. Then, by regeneration, the molecular chains of cellulose rearranged and reconstituted into an aggregated structure.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of anti-solvents on the characteristics of regenerated cellulose from 1-ethyl-3-methylimidazolium acetate ionic liquid

Tan

Chen

et al. 2019

International Journal of Biological Macromolecules

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This work investigates the effect of different anti-solvents (water, ethanol, or both water and ethanol) on the characteristics of cellulose dissolved and then generated from 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]). Compared with original microcrystalline cellulose (MCC) granules, all regenerated celluloses showed a homogeneous, agglomerated macromorphology and had its crystalline structure transformed from original cellulose I to cellulose II. The regenerated cellulose using water (43.3%) had a higher degree of crystallinity than that using ethanol (13.5%), and a degree of crystallinity of 21.3% was obtained when an ethanol-water-ethanol treatment method was used. SAXS and FTIR results indicate that water as an anti-solvent could promote the rearrangement of cellulose molecular chains and the rebuilding of an ordered aggregated structure. Moreover, the regenerated cellulose with water showed better thermal stability than that of the samples regenerated using ethanol. Thus, our results suggest that the reconstitution of cellulose molecules during regeneration with various anti-solvents can affect the multiscale structures and properties of cellulose.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of anti-solvents on the characteristics of regenerated cellulose from 1-ethyl-3-methylimidazolium acetate ionic liquid

Tan

Chen

et al. 2019

International Journal of Biological Macromolecules

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“…Moreover, the absorption peaks at 1376 cm -1 and 1561 cm -1 (associated with symmetric and asymmetric acetate group) are characteristic of [C2mim]OAc. They are shifted, also suggesting that the interactions between [C2mim]OAc and DMC become strong [44]. The hydroxyl-functionalized polytriazole itself plays an important role in the cosolvency for the ternary system investigated here.…”

Section: Cosolvencymentioning

confidence: 75%

Highly porous polytriazole ion exchange membranes cast from solutions in non-toxic cosolvents

Chişcă

Torsello

Avanzato

et al. 2017

Polymer

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Citation Chisca S, Torsello M, Avanzato M, Xie Y, Boi C, et al. (2017) Highly porous polytriazole ion exchange membranes cast from solutions in non-toxic cosolvents. Polymer. Available: http:// dx.Please cite this article as: Chisca S, Torsello M, Avanzato M, Xie Y, Boi C, Nunes SP, Highly porous polytriazole ion exchange membranes cast from solutions in non-toxic cosolvents, Polymer (2017), AbstractThe development of highly functionalized porous materials for protein separation is important for biotech processes. We report the preparation of highly porous polytriazole with sulfonic acid functionalization. The resulting ion exchange membranes are selective for protein adsorption. The starting material was a hydroxyl-functionalized polytriazole, which is an advantageous platform for further modification. The polymer was dissolved in a mixture of 1ethyl-3-methylimidazolium acetate ([C2mim]OAc) and dimethyl carbonate (DMC), which can be both considered green solvents. The polymer solubilization was only possible due to an interesting effect of cosolvency, which is discussed, based in phase diagrams. Membranes were prepared by solution casting, followed by immersion in a non-solvent bath. We then grafted sulfone groups on the membranes, by reacting the hydroxyl groups with 1,3-propane sultone and 1,4-butane sultone. Lysozyme adsorption was successfully evaluated. Membranes modified with 1,4-butane sultone adsorbed more protein than those with 1,3-propane sultone.

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“…The crystallites of G50 starch can be completely damaged during the dissolution . In addition, the molecular chains of starch can rearrange into an aggregated structure with the addition of excess anti‐solvents.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, 1‐ethyl‐3‐methylimidazolium acetate ([Emim][OAc]) was used as a solvent of a high‐amylose starch considering its excellent dissolution capability . Native G50 starch was firstly dissolved in [Emim][OAc].…”

Section: Introductionmentioning

confidence: 99%

Characterization of regenerated starch from 1‐ethyl‐3‐methylimidazolium acetate ionic liquid with different anti‐solvents

Liu

Tan

et al. 2018

J Polym Sci B Polym Phys

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A comparison study of the structures and properties of starches regenerated from 1‐ethyl‐3‐methylimidazolium acetate ([Emim][OAc]) using different anti‐solvents (water, ethanol, or both water and ethanol) was conducted. The starch regenerated with water presented a V‐type crystalline structure whereas the one regenerated in ethanol displayed amorphous structure. Moreover, when an ethanol–water–ethanol method was used for regeneration, the product showed a weak V‐type crystalline structure. SAXS and FTIR were also used to investigate the molecular order of native and regenerated starches. With water used for regeneration, the aggregation and rearrangement of starch molecules occurred more easily. The increased enzyme resistance and thermal stability of regenerated starch with water could be ascribed to the rearrangement of molecular chains forming an aggregated structure with some degree of order. The reconstitution of starch molecules during regeneration with different anti‐solvents changed the multiscale structures and properties of the starch. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 1231–1238

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Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Cited by 60 publications

References 47 publications

Effect of anti-solvents on the characteristics of regenerated cellulose from 1-ethyl-3-methylimidazolium acetate ionic liquid

Effect of anti-solvents on the characteristics of regenerated cellulose from 1-ethyl-3-methylimidazolium acetate ionic liquid

Highly porous polytriazole ion exchange membranes cast from solutions in non-toxic cosolvents

Characterization of regenerated starch from 1‐ethyl‐3‐methylimidazolium acetate ionic liquid with different anti‐solvents

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