Dissolving of cellulose in PEG/NaOH aqueous solution

Yan, Lifeng; Gao, Zhiyuan

doi:10.1007/s10570-008-9233-5

Cited by 135 publications

(94 citation statements)

References 22 publications

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“…The possible swelling mechanism of the aqueous mixture is that sodium hydroxide hydrates destroy the intermolecular and intramolecular hydrogen bonds in cellulose, whereas the amino groups of urea easily form hydrogen bonds with hydroxyl groups in cellulose. The synergistic action of NaOH and urea prevents binding between cellulose molecules and finally weakens the binding force of cellulose molecules (Cai and Zhang 2005;Yan and Gao 2008). Compared with single NaOH solution, the presence of urea could further enhance the effect of pretreatment due to its synergy with NaOH and lead to better swelling of the cellulose (Wang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Nanocellulose Fibers from NaOH/Urea Pretreatment of Oil Palm Fibers

Luo¹,

Wang²

2017

BioResources

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A facile method is reported to prepare nanocellulose fibers from oil palm trunk fibers. The fibers were pretreated 2 hours with NaOH/urea solution, and the fully swelled fibers were mechanically treated through highpressure homogenization to obtain nanocellulose. The nanocellulose fibers were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). FTIR results revealed that there was no obvious difference between the spectra of the bleached fibers (BF), pretreated cellulose fibers (PCF), and cellulose nanofibers (NCF), which indicated that the pretreatment process is a non-derivative reaction. The crystallinity of PCF and NCF decreased and contained the cellulose I crystal structure. The PCF presented both a distorted structure and a coarser surface. The resulting NCF were approximately 10 nm to 100 nm in diameter with the length varying from hundreds of nanometers to several micrometers, as observed by SEM. The thermal degradation of NCF was 223 °C with about 20% weight loss, and the maximum degradation temperature was 338 °C. NaOH/urea showed potential as a mild solvent for preparing nanocellulose fibers.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Nanocellulose Fibers from NaOH/Urea Pretreatment of Oil Palm Fibers

Luo¹,

Wang²

2017

BioResources

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“…These include sodium hydroxide (NaOH) at low temperatures without or with additives, such as urea, thiourea, and polyethylene glycol [13][14][15][16].…”

Section: Aqueous Mediamentioning

confidence: 99%

Cellulose modification and shaping – a review

Jedvert

Heinze

2017

Journal of Polymer Engineering

142

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Abstract This review aims to present cellulose as a versatile resource for the production of a variety of materials, other than pulp and paper. These products include fibers, nonwovens, films, composites, and novel derivatized materials. This article will briefly introduce the structure of cellulose and some common cellulose derivatives, as well as the formation of cellulosic materials in the micro- and nanoscale range. The challenge with dissolution of cellulose will be discussed and both derivatizing and nonderivatizing solvents for cellulose will be described. The focus of the article is the critical discussion of different shaping processes to obtain a variety of cellulose products, from commercially available viscose fibers to advanced and functionalized materials still at the research level.

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“…In this work, the regeneration of ball-milled Masson pine dissolved in NaOH aqueous solution was carried out by adding HCl into the solution (Yan and Gao 2008). The pH of this solution was adjusted to 0, 1, 4, and 7 using 3 M HCl, and the regenerated lignin and cellulose were analyzed to understand the effect of pH on the regeneration of different structural components in the ball-milled pine sample.…”

Section: Regeneration Of Ball-milled Masson Pine Dissolved In Naoh Aqmentioning

confidence: 99%

Complete Dissolution of Ball-Milled Masson Pine Using an Aqueous Sodium Hydroxide Solvent

Zhu

Yang

et al. 2016

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An inorganic sodium hydroxide aqueous solution was developed for the dissolution of ball-milled softwood. Extractive-free Masson pine powder was prepared from the wood meal by planetary ball milling for various lengths of time. The effects of ball milling on the dissolution and regeneration of Masson pine powder were investigated. After 4 h of ball milling, the wood powder was completely dissolved in 6 wt% NaOH aqueous solution under vigorous magnetic stirring for 10 to 20 min at room temperature. The alkaline nitrobenzene oxidation products yield of 4 h ballmilled wood was very close to that of coarse wood meal without ball milling. Regeneration of the lignin fraction was easier than cellulose during the acid neutralization process, and the dialysis regeneration yield of total biomass was 91.1%. Therefore, the complete dissolution of the Masson pine in sodium hydroxide solution is of great potential for enhancing lignin isolation with a very little structural change.

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Dissolving of cellulose in PEG/NaOH aqueous solution

Cited by 135 publications

References 22 publications

Preparation and Characterization of Nanocellulose Fibers from NaOH/Urea Pretreatment of Oil Palm Fibers

Preparation and Characterization of Nanocellulose Fibers from NaOH/Urea Pretreatment of Oil Palm Fibers

Cellulose modification and shaping – a review

Complete Dissolution of Ball-Milled Masson Pine Using an Aqueous Sodium Hydroxide Solvent

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