Preparation of cellulose I nanowhiskers with a mildly acidic aqueous ionic liquid: reaction efficiency and whiskers attributes

Mao, Jia; Osorio‐Madrazo, Anayancy; Laborie, Marie‐Pierre

doi:10.1007/s10570-013-9942-2

Cited by 74 publications

(47 citation statements)

References 44 publications

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“…The application of nanotechnology has been first introduced in papermaking to understand the basic organization of cellulose fibers and its components. The cell wall of native cellulose fibers is composed of primary and secondary layers with a specific arrangement of fine fibrils with nanoscale dimensions, which can be liberated by mechanical disintegration [80], or chemical hydrolysis [81] leading to so-called micro/nanofibrillated cellulose (MFC and NFC) and cellulose nanocrystals (CNC), respectively. These materials have been used as filler materials paper sheets [82,83], and nanopaper production [84] with improved mechanical and barrier properties.…”

Section: Advances In Nanotechnology For Paper Applicationsmentioning

confidence: 99%

Bio-Based Coatings for Paper Applications

2015

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Abstract:The barrier resistance and wettability of papers are commonly controlled by the application of petroleum-based derivatives such as polyethylene, waxes and/or fluor-derivatives as coating. While surface hydrophobicity is improved by employing these polymers, they have become disfavored due to limitations in fossil-oil resources, poor recyclability, and environmental concerns on generated waste with lack of biodegradation. Alternatively, biopolymers including polysaccharides, proteins, lipids and polyesters can be used to formulate new pathways for fully bio-based paper coatings. However, difficulties in processing of most biopolymers may arise due to hydrophilicity, crystallization behavior, brittleness or melt instabilities that hinder a full exploitation at industrial scale. Therefore, blending with other biopolymers, plasticizers and compatibilizers is advantageous to improve the coating performance. In this paper, an overview of barrier properties and processing of bio-based polymers and their composites as paper coating will be discussed. In particular, recent technical advances in nanotechnological routes for bio-based nano-composite coatings will be summarized, including the use of biopolymer nanoparticles, or nanofillers such as nanoclay and nanocellulose. The combination of biopolymers along with surface modification of nanofillers can be used to create hierarchical structures that enhance hydrophobicity, complete barrier protection and functionalities of coated papers. OPEN ACCESSCoatings 2015, 5 888

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Section: Advances In Nanotechnology For Paper Applicationsmentioning

confidence: 99%

Bio-Based Coatings for Paper Applications

2015

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“…Despite the fact that the mechanism of cellulose dissolution with ionic liquid remains disputable, some ionic liquids, favorably imidazole-based, are used to produce nanometric cellulose. Moreover, it was proved that aqueous ionic liquid is as well or even more effective in terms of nanometric cellulose production than dehydrated ones [12,13]. Time and temperature of ionic liquid treatment were also found to be of critical importance [14].…”

Section: Introductionmentioning

confidence: 98%

Thermal and mechanical properties of chitosan nanocomposites with cellulose modified in ionic liquids

Grząbka-Zasadzińska

Amietszajew

Borysiak

2017

J Therm Anal Calorim

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In this paper, ionic liquid treatment was applied to produce nanometric cellulose particles of two polymorphic forms. A complex characterization of nanofillers including wide-angle X-ray scattering, Fourier transform infrared spectroscopy, and particle size determination was performed. The evaluated ionic liquid treatment was effective in terms of nanocrystalline cellulose production, leaving chemical and supermolecular structure of the materials intact. However, nanocrystalline cellulose II was found to be more prone to ionic liquid hydrolysis leading to formation larger amount of small particles. Each nanocrystalline cellulose was subsequently mixed with a solution of chitosan, so that composite films containing 1, 3, and 5% mass/mass of nanometric filler were obtained. Reference samples of chitosan and chitosan with micrometric celluloses were also solvent casted. Thermal, mechanical, and morphological properties of films were tested and correlated with properties of filler used. The results of both, tensile tests and thermogravimetric analysis showed a significant discrepancy between composites filled with nanocrystalline cellulose I and nanocrystalline cellulose II.

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“…Two or more acid functions can be built‐in to the same Brønsted acidic ionic liquids to enhance the catalytic function. The acidic ionic liquids like 1‐butyl‐3‐methylimidazolium hydrogensulfate are used in partial depolymerisations and preparation of cellulose nanowhiskers . These Brønsted acidic ionic liquids can behave as the solvent as well as the catalyst; no neutralization and separation of the acid catalyst is required, and there is no waste in acid.…”

Section: Ionic Liquids In Biomass Depolymerisationsmentioning

confidence: 99%

Ionic Liquids in Biomass Processing

Amarasekara

2018

Israel Journal of Chemistry

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The ionic liquids have emerged as new solvents and catalysts for processing biomass to value added chemicals and fuels. This review will present the recent developments in applications of ionic liquids in lignocellulosic biomass pretreatments, depolymerization, biodiesel synthesis, dehydration of carbohydrates to renewable feedstock chemicals as well as further transformations of biomass derived feedstocks such as furfural, 5‐hydroxymethylfurfural and levulinic acid to value added chemicals. In addition, the recycling of ionic liquids used in biomass processing is also discussed in the review.

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Preparation of cellulose I nanowhiskers with a mildly acidic aqueous ionic liquid: reaction efficiency and whiskers attributes

Cited by 74 publications

References 44 publications

Bio-Based Coatings for Paper Applications

Bio-Based Coatings for Paper Applications

Thermal and mechanical properties of chitosan nanocomposites with cellulose modified in ionic liquids

Ionic Liquids in Biomass Processing

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