Efficient preparation of high concentration cellulose solution with complex DMSO/ILs solvent

Li, Xinda; Zhang, Yue; Tang, Jingwen; Lan, Ai; Yang, Yanping; Gibril, Magdi E.; Yu, Miao

doi:10.1007/s10965-016-0922-8

Cited by 23 publications

(17 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to increased steric repulsion between the chains of the biopolymer-IL complex, and disruption of the solvophobic interactions between the AGUs, due to interactions of the latter with the (usually voluminous) cation. Most certainly, these IL-cellulose interactions proceed simultaneously rather than in the above-mentioned stepwise manner, as represented schematically in Figure 3 for the dissolution of cellulose in a mixture of EtMeImAcO-DMSO [41]. Thus, the charge density (hardness; Lewis basicity) and volume of the anion, the volume, rigidity, Lewis acidity, and hydrophobic character of the cation are determinant to cellulose dissolution [16].…”

Section: Solvatochromism and Calculation Of Solvatochromic Parametersmentioning

confidence: 99%

“…Polymers 2019, 11, x FOR PEER REVIEW 6 of 28 uptake by the cellulose/IL solution during the experiment (e.g., that resulted from opening the vials to take samples for examination) is not commented upon. Likewise, biopolymer dissolution was judged visually, using a camera, a microscope, or by turbidity measurements [8,11,41,43,47]. Additionally, dissolution efficiency was reported using different composition scales, including, wt or volume percentage (100 × (wtCellulose/[wtIL + wtMS]) or 100 × (wtCellulose/[VIL + VMS]), and mole fraction χ.…”

Section: Use Of Solvatochromic Parameters To Assess the Efficiency Ofmentioning

confidence: 99%

“…Schematic representation of the mechanism of cellulose dissolution in 1-ethyl-3-methylimidazolium acetate-dimethyl sulfoxide (EtMeImAcO-DMSO) mixture. The ionic liquid (IL) cation is solvated by DMSO and associated with the negatively charged cellulose-acetate ion H-bonded complex, redrawn from[41], with permission from Springer, 2016.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration

et al. 2019

View full text Add to dashboard Cite

This review is focused on assessment of solvents for cellulose dissolution and the mechanism of regeneration of the dissolved biopolymer. The solvents of interest are imidazole-based ionic liquids, quaternary ammonium electrolytes, salts of super-bases, and their binary mixtures with molecular solvents. We briefly discuss the mechanism of cellulose dissolution and address the strategies for assessing solvent efficiency, as inferred from its physico-chemical properties. In addition to the favorable effect of lower cellulose solution rheology, microscopic solvent/solution properties, including empirical polarity, Lewis acidity, Lewis basicity, and dipolarity/polarizability are determinants of cellulose dissolution. We discuss how these microscopic properties are calculated from the UV-Vis spectra of solvatochromic probes, and their use to explain the observed solvent efficiency order. We dwell briefly on use of other techniques, in particular NMR and theoretical calculations for the same purpose. Once dissolved, cellulose is either regenerated in different physical shapes, or derivatized under homogeneous conditions. We discuss the mechanism of, and the steps involved in cellulose regeneration, via formation of mini-sheets, association into "mini-crystals", and convergence into larger crystalline and amorphous regions. We discuss the use of different techniques, including FTIR, X-ray diffraction, and theoretical calculations to probe the forces involved in cellulose regeneration.

show abstract

Section: Solvatochromism and Calculation Of Solvatochromic Parametersmentioning

confidence: 99%

Section: Use Of Solvatochromic Parameters To Assess the Efficiency Ofmentioning

confidence: 99%

See 1 more Smart Citation

Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Ionic liquids are considered environmentally friendly solvents, and some of them dissolve cellulose. Besides, ionic liquids have low toxicity, thermal stability, negligible volatility, recyclability, and promote dissolvability for cellulosic particles (Li et al 2016b). Ionic liquids, including 1-butyl-3-methylimidazolium formate (BMIMFmO) (Xu et al 2010), 1-butyl-3-methylimidazolium chloride (BmimCl) (Erdmenger et al 2007), N,Ndimethylacetamide/lithium chloride (DMAc/LiCl) (Potthast et al 2002), NaOH/thiourea (Jiang et al 2017), LiOH/urea, and NaOH-urea (Cai and Zhang 2005) are able to properly dissolve cellulose.…”

Section: Cellulose Propertiesmentioning

confidence: 99%

Cellulose and its derivatives: towards biomedical applications

et al. 2021

View full text Add to dashboard Cite

Cellulose is the most abundant polysaccharide on Earth. It can be obtained from a vast number of sources, e.g. cell walls of wood and plants, some species of bacteria, and algae, as well as tunicates, which are the only known cellulose-containing animals. This inherent abundance naturally paves the way for discovering new applications for this versatile material. This review provides an extensive survey on cellulose and its derivatives, their structural and biochemical properties, with an overview of applications in tissue engineering, wound dressing, and drug delivery systems. Based on the available means of selecting the physical features, dimensions, and shapes, cellulose exists in the morphological forms of fiber, microfibril/nanofibril, and micro/nanocrystalline cellulose. These different cellulosic particle types arise due to the inherent diversity among the source of organic materials or due to the specific conditions of biosynthesis and processing that determine the consequent geometry and dimension of cellulosic particles. These different cellulosic particles, as building blocks, produce materials of different microstructures and properties, which are needed for numerous biomedical applications. Despite having great potential for applications in various fields, the extensive use of cellulose has been mainly limited to industrial use, with less early interest towards the biomedical field. Therefore, this review highlights recent developments in the preparation methods of cellulose and its derivatives that create novel properties benefiting appropriate biomedical applications.

show abstract

“…Due to extremely interesting properties of cellulose including biocompatibility, renewability, biodegradability and fascinating structural, thermal and chemical stabilities, it has been employed for a wide spectrum of applications such as in the production of textiles, paints, membranes and pharmaceuticals and particularly in the production of biofuels by fermentation of glucose units after enzymatic or acidic hydrolysis of cellulose …”

Section: Introductionmentioning

confidence: 99%

Impact of non‐solvent on regeneration of cellulose dissolved in 1‐(carboxymethyl)pyridinium chloride ionic liquid

Taheri

Abdolmaleki

Fashandi

2019

Polymer International

View full text Add to dashboard Cite

Cellulose dissolved in ionic liquid (1-(carboxymethyl)pyridinium chloride)/water (60/40 w/w) mixture is regenerated in various non-solvents, namely water, ethanol, methanol and acetone, to gain more insight into the contribution of non-solvent medium to the morphology of regenerated cellulose. To this end, the initial and regenerated celluloses were characterized with respect to crystallinity, thermal stability, chemical structure and surface morphology using wide-angle X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. According to the results, regardless of non-solvent type, all regenerated samples have the same chemical structure and lower crystallinity in comparison to the initial cellulose, making them a promising candidate for efficient biofuel production based on enzymatic hydrolysis of cellulose. The reduction in crystallinity of regenerated samples is explained based on the potential of the non-solvent to break the hydrogen bonds between cellulose chains and ionic liquid molecules as well as the affinity of water and non-solvent which can be evaluated based on Hansen solubility parameter. The latter also determines the phase-separation mechanism during the regeneration process, which in turn affects surface morphology of the regenerated cellulose. The pivotal effect of regenerated cellulose crystallinity on its thermal stability is also demonstrated. Regenerated cellulose with lower crystallinity is more susceptible to molecular rearrangement during heating and hence exhibits enhanced thermal stability.

show abstract

Efficient preparation of high concentration cellulose solution with complex DMSO/ILs solvent

Cited by 23 publications

References 36 publications

Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration

Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration

Cellulose and its derivatives: towards biomedical applications

Impact of non‐solvent on regeneration of cellulose dissolved in 1‐(carboxymethyl)pyridinium chloride ionic liquid

Contact Info

Product

Resources

About