Role of low-concentration acetic acid in promoting cellulose dissolution

Hu, Yang; Thalangamaarachchige, Vidura D.; Acharya, Sanjit; Abidi, Noureddine

doi:10.1007/s10570-018-1863-7

Cited by 24 publications

(13 citation statements)

References 47 publications

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“…Some green solvent systems including N-methylmorpholine-N-oxide (NMMO) [9], ionic liquid [10], water-based solvent systems [11] and mixed solvent systems-including amino acid ionic liquid/dimethyl sulfoxide (DMSO), tetra(n-butyl) ammonium hydroxide (TBAH) aqueous solution [12] and deep eutectic solvents (DESs) [13]-have been successively developed to dissolve cellulose. Although the mechanisms of cellulose dissolution varies with solvents, most researchers believe that-regardless of the molecule weight and crystallinity of cellulose [14]-the destruction of inter-molecule and intra-molecule hydrogen bonds in the complex structure of cellulose is a prerequisite to dissolve cellulose. Moreover, the interaction between the hydroxyl protons of D-dehydrated pyran glucose unit and dissociated solvent anions is the main driving force for cellulose dissolution [15].…”

Section: Introductionmentioning

confidence: 99%

Glycerin/NaOH Aqueous Solution as a Green Solvent System for Dissolution of Cellulose

Yang

Jiang

et al. 2020

Polymers

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Dissolving cellulose in water-based green solvent systems is highly desired for further industrial applications. The green solvent glycerin—which contains hydrogen-bonding acceptors—was used together with NaOH and water to dissolve cellulose. This mixed aqueous solution of NaOH and glycerin was employed as the new green solvent system for three celluloses with different degree of polymerization. FTIR (Fourier-transform infrared), XRD (X-ray diffractometer) and TGA (thermogravimetric analysis) were used to characterize the difference between cellulose before and after regenerated by HCl. A UbbeloHde viscometer was used to measure the molecule weight of three different kinds of cellulose with the polymerization degree of 550, 600 and 1120. This solvent system is useful to dissolve cellulose with averaged molecule weight up to 2.08 × 105 g/mol.

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Section: Introductionmentioning

confidence: 99%

Glycerin/NaOH Aqueous Solution as a Green Solvent System for Dissolution of Cellulose

Yang

Jiang

et al. 2020

Polymers

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“…All cellulose samples (Avicel, Avicel CNC, BEP CNC and BEP CNF) and LiCl were previously dried at 70 ºC in a JSR JSVO-60 T vacuum oven (Gongju city, South Korea) for at least 24 h to remove residual moisture, which could affect the dissolution e ciency. The dissolution method was based on Hu et al (2018) and Ishii et al (2008), using the cellulose to DMAc/LiCl ratio (w/w) of 3/97. First, each of the dried cellulose samples was mixed with DMAc, heated to 150 ºC and stirred for 1 h. Heating the DMAc just below its boiling point is crucial for cellulose activation and consequent dissolution since it allows the penetration of the solvent and swelling of the bers (Dupont 2003).…”

Section: Cellulose Dissolutionmentioning

confidence: 99%

“…However, none of these methods could accomplish cellulose dissolution when used along with other polymers; yet these were only able to disperse the cellulose within the membranes. This is due to its complex and crystalline structure that makes it insoluble in most organic solvents (Hu, et al 2018;Ishii et al 2008;Zhang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

High-flux, porous and homogeneous PVDF/cellulose microfiltration membranes

et al. 2022

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Low hydrophilicity of membranes is probably the biggest concern in membrane ltration since it increases the costs for water treatment. Conversely, application of hydrophilic biopolymers (such as cellulose) is limited because of its complex and crystalline structure. Enabling the widely use of the most common biopolymer in nature is crucial to improve the performance of water treatment, especially in terms of membrane sustainability. Here, we study the effect of cellulose dissolution in the synthesis of homogeneous PVDF/cellulose membranes. Although only partial dissolution was achieved for studied samples, adding cellulose to the membranes greatly improved their water ux. Besides, the porous structure obtained after partial solvent removal indicates the WF (and consequently the pore size) may be tailored according to the membrane production method. Therefore, the homogeneous cellulose micro ltration membranes studied here may have potential for water treatment considering their highwater ux and low complexity to produce.

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“…The scan speed was 1°•min −1 at 40 kV and 30 mA with a 2θ range of 5° to 50°. The crystallinity index (CrI) was calculated using the following equation (Hu et al 2018;Yao et al 2020;Ruan et al 2016).…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

“…Even mixtures of metal chlorides and ionic liquids can only dissolve cellulose with a DP of approximately 800 (Li et al 2019). Thus, high-molecular-weight (HMW) cellulose such as cotton cellulose (DP >5000) remains relatively insoluble and has a slow dissolution rate (Hu et al 2019;Hu et al 2018). Therefore, a simple and rapid method for improving the solubility of HMW-cellulose is urgently required.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 2-methylacrylamide/high-molecular-weight Cellulose for Removing Anionic Dyes from Water by Irradiation with Gamma Rays

Zhang

Fan

et al. 2021

Preprint

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We report a new method for treating high-molecular-weight cellulose with 60Co gamma rays to simultaneously graft functional groups onto the natural polymer and promote its solubility. After exposing cellulose to a 40-kilogray dose of gamma rays in the presence of 2-methylacrylamide, numerous amide groups were grafted onto the cellulose chain and its solubility increased markedly. Amide-functionalized aerogels were prepared via the sol-gel method using the irradiated product as a raw material. Compared with 40-kGy-irradiated cellulose aerogel, the amide-functionalized aerogels had relatively high zero-point charge pH values and excellent adsorption capacities with regard to anionic dyes over the pH range 2-10. They were also stable in terms of reusability. Therefore, the 2-methylacrylamide/high-molecular-weight cellulose aerogel has great potential for use in the treatment of colored surface wastewater. The 60Co gamma ray irradiation technique described herein is a flexible, stable and highly efficient method for the preparation of functionalized cellulose products.

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Role of low-concentration acetic acid in promoting cellulose dissolution

Cited by 24 publications

References 47 publications

Glycerin/NaOH Aqueous Solution as a Green Solvent System for Dissolution of Cellulose

Glycerin/NaOH Aqueous Solution as a Green Solvent System for Dissolution of Cellulose

High-flux, porous and homogeneous PVDF/cellulose microfiltration membranes

Synthesis of 2-methylacrylamide/high-molecular-weight Cellulose for Removing Anionic Dyes from Water by Irradiation with Gamma Rays

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