All-cellulose composites based on microfibrillated cellulose and filter paper via a NaOH-urea solvent system

Duchemin, B.; LeCorre, Déborah; Leray, Nolwenn; Dufresne, Alain; Staiger, Mark P.

doi:10.1007/s10570-015-0835-4

Cited by 86 publications

(60 citation statements)

References 74 publications

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“…Several investigators have employed these same compositions as their cold alkaline solvents to prepare their ACCs [3,8,11,12]. Li et al employed a 94% aqueous solution volume of 4.6% LiOH⋅H 2 O/12% urea solution to dissolve 6% cotton/cellulose [7].…”

Section: Resultsmentioning

confidence: 99%

“…Initially, we chose to employ this aqueous alkaline formulation in our first LC studies, since this solution was identified to be very effective [7]. In contrast to other studies, we initially employed a 22% cellulose/lignocellulose mass in a 78% alkaline aqueous solution volume of 4.6% LiOH⋅H 2 O/12% urea solution at −10 ∘ C. Rather than attempting to dissolve the entire cotton (cellulose) portion in the alkaline aqueous solvent as other investigators did [3,[6][7][8][9][10], our aim was to only partially dissolve the cotton/cellulose portion in order to obtain an "adhesive" or "plastic-like" gel matrix that could then be mixed with lignocellulosic reinforcement agents (e.g., OOW and/or AF). Initially, we prepared construct formulations of 100% cotton, 100% OOW, 100% AF, 25% cotton: 75% OOW, 25% cotton: 75% AF, or 25% cotton: 75% OOW/AF.…”

Section: Resultsmentioning

confidence: 99%

“…The carbohydrate fraction (cellulose and hemicellulose) of lignocellulosic biomass is speculated to be covalently linked to lignin [1,3]. One method used to break down the lignocellulosic bonds is to employ cold alkaline solvents [1][2][3][4][5][6][7][8][9][10][11]. For example, cold sodium hydroxide (7% NaOH) or sodium hydroxide/urea solutions (≈7% NaOH/12% urea solution) cooled to −12 ∘ C is capable of breaking cellulose linkages to synthesis cellulose derivatives [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing these techniques, dissolved cellulose could serve as a matrix and be reinforced with undissolved cellulose materials to generate novel all-cellulose composites (ACC) once the alkaline solution was removed [3][4][5][6][7][8][10][11][12]. These novel ACCs are "environmentally friendly" and can be "recycled" since the composite is entirely composed of cellulose [1,3,6,8,[10][11][12]. ACC films (0.25 mm thick) composed of cellulose nanowhiskers and a cellulose matrix has been produced using a cold aqueous alkaline solution (7% NaOH/12% urea at −12 ∘ C) [7,8,11].…”

Section: Introductionmentioning

confidence: 99%

“…These novel ACCs are "environmentally friendly" and can be "recycled" since the composite is entirely composed of cellulose [1,3,6,8,[10][11][12]. ACC films (0.25 mm thick) composed of cellulose nanowhiskers and a cellulose matrix has been produced using a cold aqueous alkaline solution (7% NaOH/12% urea at −12 ∘ C) [7,8,11]. Recently, a cold aqueous alkaline solution of LiOH⋅H 2 O (4.6% LiOH⋅H 2 O : 15% urea at −12 ∘ C) was used to generate a nonporous cellulose gel from cotton fibers [7].…”

Section: Introductionmentioning

confidence: 99%

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Lignocellulosic Composites Prepared Utilizing Aqueous Alkaline/Urea Solutions with Cold Temperatures

Tisserat

Liu

Haverhals

2018

International Journal of Polymer Science

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Lignocellulosic composites (LCs) were fabricated by partially dissolving cotton to create a matrix that was reinforced with osage orange wood (OOW) particles and/or blue agave fibers (AF). LCs were composed of 15-35% cotton matrix and 65-85% OWW/AF reinforcement. The matrix was produced by soaking cotton wool in a cold aqueous alkaline/urea solvent and was stirred for 15 minutes at 350 rpm to create a viscous gel. The gel was then reinforced with lignocellulosic components, mixed, and then pressed into a panel mold. LC panels were soaked in water to remove the aqueous solvent and then oven dried to obtain the final LC product. Several factors involved in the preparation of these LCs were examined including reaction temperatures (−5 to −15 ∘ C), matrix concentration (15-35% cotton), aqueous solvent volume (45-105 ml/panel), and the effectiveness of employing various aqueous solvent formulations. The mechanical properties of LCs were determined and reported. Conversion of the cotton into a suitable viscous gel was critical in order to obtain LCs that exhibited high mechanical properties. LCs with the highest mechanical properties were obtained when the cotton wools were subjected to a 4.6% LiOH/15% urea solvent at −12.5 ∘ C using an aqueous solvent volume of 60 ml/panel. Cotton wool subjected to excessive cold alkaline solvents volumes resulted in irreversible cellulose breakdown and a resultant LC that exhibited poor mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Lignocellulosic Composites Prepared Utilizing Aqueous Alkaline/Urea Solutions with Cold Temperatures

Tisserat

Liu

Haverhals

2018

International Journal of Polymer Science

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Construction of novel regenerated cellulose based foam derived from waste cigarette filters as effective oil adsorbent

Zhang

Cheng

Fang

et al. 2021

J of Applied Polymer Sci

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The reuse of waste cigarette filters is helpful to save resources and protect environment, and cellulose based functional materials can be applied in wastewater treatment due to the high porosity. Therefore, a novel kind of cellulose foams were fabricated by using waste cigarette filters and polyvinyl alcohol via a lyophilization technology and hydrophobicity modification in this work.As-prepared foams possessed an ultra-low density and high specific surface area (up to 40 m 2 g À1 ). After the hydrophobicity modification, the cellulose foam exhibited a water contact angle of 91.9 and 126.2 on external surface and cross section, which showed a superior oil adsorption capacity of 14 g g À1 . These developed cellulose foams have a low cost, good hydrophobicity and high adsorption capacity for oil as a promising absorbent, realizing the conversion of waste into high-value products successfully.

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Synthesis of Alkaline‐Soluble Cellulose Methyl Carbamate Using a Reactive Deep Eutectic Solvent

Sirviö

Heiskanen

2016

ChemSusChem

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This study presents the use of a reactive deep eutectic solvent (DES) for the chemical modification of wood cellulose fibers. DES based on dimethylurea and ZnCl was used to synthetize cellulose methyl carbamate (CMeC). This synthesis was performed at elevated temperature under solvent-free conditions. Chemical characterization based on FTIR and NMR indicated that methyl carbamate was successfully introduced to cellulose, and a degree of substitution (DS) of 0.17 was obtained after 3 h of reaction at 150 °C. The product with a DS of 0.17 exhibited good alkaline solubility (in 3 % NaOH solution) after freeze-thawing, whereas the original cellulose fibers were practically insoluble even in 9 % NaOH. As dimethylurea can be produced from CO , this method can be used as a sustainable way to obtain novel cellulose materials with desirable properties for use in a wide range of applications.

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All-cellulose composites based on microfibrillated cellulose and filter paper via a NaOH-urea solvent system

Cited by 86 publications

References 74 publications

Lignocellulosic Composites Prepared Utilizing Aqueous Alkaline/Urea Solutions with Cold Temperatures

Lignocellulosic Composites Prepared Utilizing Aqueous Alkaline/Urea Solutions with Cold Temperatures

Construction of novel regenerated cellulose based foam derived from waste cigarette filters as effective oil adsorbent

Synthesis of Alkaline‐Soluble Cellulose Methyl Carbamate Using a Reactive Deep Eutectic Solvent

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