Alkaline treatment combined with enzymatic hydrolysis for efficient cellulose nanofibrils production

Banvillet, Gabriel; Depres, Gaël; Belgacem, Naceur; Bras, Julien

doi:10.1016/j.carbpol.2020.117383

Cited by 53 publications

(30 citation statements)

References 55 publications

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“…Cellulose fibres were dissolved in a bis(ethylenediamine)copper(II) hydroxide solution. The intrinsic viscosity [Ƞ] was measured at 25°C with a capillary viscosimeter and the DP was deduced using the Mark− Houwink−Sakurada equation (Banvillet et al, 2021). Two measurements were made for each sample.…”

Section: Degree Of Polymerisation (Dp)mentioning

confidence: 99%

“…It is known that alkaline treatment allows increasing the crystallinity as observed with other treatments such as ammonia treatment at higher temperature (Mittal, Katahira, Himmel, & Johnson, 2011) or combination of NaOH (10 wt%) with enzymatic treatment (Banvillet, Depres, Belgacem, & Bras, 2021). However, with these alkaline treatments, the initial allomorph of cellulose is changed which is not the case with DES-treatment.…”

Section: Figure 4 Xrd Diffractograms Of Treated-eucalyptus Fibres (A)...mentioning

confidence: 99%

“…For many years, one of the main topics of our group has been related to the reduction of the energy costs associated with cellulose microfibrillation (Banvillet, Depres, Belgacem, & Bras, 2021;Rol et al, 2017Rol et al, , 2020. Nowadays, various pre-treatments (biological or chemical) are used before the main mechanical treatment of the microfibrillation process (ultrafine grinding, homogenisation…) in order to reduce the energy consumption (Nechyporchuk, Belgacem, & Bras, 2016;Rol, Belgacem, Gandini, & Bras, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Section: Figure 4 Xrd Diffractograms Of Treated-eucalyptus Fibres (A)...mentioning

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“…Chemical pretreatment can destroy hydrogen bonds network inside the fibers, and the rigid structures of the fibers are softened, so that the fibers can be easily homogenized using a high pressure homogenizer. [ 114‐118 ] The most commonly used chemical pretreatment method is TEMPO (2,2,6,6‐Tetramethylpiperidine 1‐oxyl) oxidation. In the presence of NaBr and NaOCl, TEMPO oxidation is highly selective, which can oxidize hydroxyl groups on cellulose glucose unit C6 to carboxyl groups, while the hydroxyl groups on cellulose glucose unit C2 and C3 are not oxidized.…”

Section: Preparation Of Mofs Cellulose Derivatives and Mof@cellulose Hybridsmentioning

confidence: 99%

“…Since the rigid structure of the fibers has been softened, there is little blockage during the homogenization process. [ 114‐118 ] Moreover, the most common method to produce CNFs is mechanical techniques. [ 119‐120 ] These techniques pave the way for the industrial production of CNFs.…”

Section: Preparation Of Mofs Cellulose Derivatives and Mof@cellulose Hybridsmentioning

confidence: 99%

Recent Progress in Metal‐Organic Frameworks@Cellulose Hybrids and Their Applications

et al. 2021

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In recent years, metal‐organic frameworks (MOFs) are attracting increasing attention due to their charming properties. However, the intrinsic fragility, powdered crystalline state, and poor processibility of MOFs hinder their further application. By this, the designs of MOF‐based aerogels, hydrogels, membranes are effective ways to solve this problem. Graphene, silica, synthetic polymer and cellulose are the commonly used raw materials for fabricating MOF‐based aerogels, hydrogels, and membranes. Among them, cellulose and its derivatives are the best candidates to support the powdered MOFs from the perspectives of economy, environmental protection and property. This review focuses on discussing the advantages of MOF@cellulose hybrids in applications such as water treatment, antibacterial, gas separation and adsorption, energy storage, drug delivery, catalysis, and other smart composites. MOF@cellulose‐based aerogels, hydrogels and membranes can provide valuable guidance for investigating the practical application of MOFs in terms of processability, reusability, stability and easiness in handling.

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Nanocelluloses review: Preparation, biological properties, safety, and applications in the food field

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Functional diet and food safety requirements, as well as reducing the consumption of nonrenewable resources and environmental pollution are the important development themes on food processing. The development and application of edible nanocelluloses (NCs) is an urgent need in the current food field. NCs are divided into three types, including cellulose nanofibrils, and cellulose nanocrystals from natural fibers, as well as bacterial cellulose synthesized by bacteria. In this review, recent developments in surface modification, biological properties, safety issues, and their applications in the food industry were highlighted. NCs have application limits due to native hydrophilicity, surface modification strengthens their hydrophobicity and stability in the oil phase. NCs exhibit excellent physicochemical properties and successfully be used as edible coatings, emulsion stabilizers, and functional food ingredients. In particular, NCs and modified NCs can be used as low‐calorie fat substitutes and prebiotics for improving gut microbiota. However, the biological properties and safety assessments still require more attention, as well as establishing the regulations for food applications.

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Alkaline treatment combined with enzymatic hydrolysis for efficient cellulose nanofibrils production

Cited by 53 publications

References 55 publications

Effects of Deep Eutectic Solvents on cellulosic fibres and paper properties: Green “chemical” refining

Effects of Deep Eutectic Solvents on cellulosic fibres and paper properties: Green “chemical” refining

Recent Progress in Metal‐Organic Frameworks@Cellulose Hybrids and Their Applications

Nanocelluloses review: Preparation, biological properties, safety, and applications in the food field

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