Acidic deep eutectic solvents pretreatment for selective lignocellulosic biomass fractionation with enhanced cellulose reactivity

Tian, Dong; Guo, Yujie; Hu, Jinguang; Yang, Gang; Zhang, Jing; Luo, Ling; Xiao, Yinlong; Deng, Shihuai; Deng, Ouping; Zhou, Wei; Shen, Fei

doi:10.1016/j.ijbiomac.2019.09.100

Cited by 142 publications

(41 citation statements)

References 61 publications

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“…The highest increase of reactivity was produced using ChCl:OxA at a 1/20 ratio, however, as stated before, this DES will not be considered as the best, because pulp after the treatment does not have enough quality to be considered suitable for viscose purposes. Tian et al (2020), stated that the hydrogen bonding abilities of DES could swell cellulose and as a result, increase reactivity, which agrees with this work. No literature has been found about the use of DES to increase reactivity.…”

Section: Effect Of Des Pre-treatment On Pulp Quality Parameterssupporting

confidence: 89%

Use of green solvents as pre-treatment of dissolving pulp to decrease CS2 consumption from viscose production

et al. 2020

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Choline chloride-based deep eutectic solvents are widely used in biomass processing. In this work, four different green solvent mixtures were used as pre-treatment of acid sulphite dissolving pulp with the hypothesis of increasing the possibilities to produce viscose fibres and decreasing the use of the harmful and toxic carbon disulphide in the process. The experiments were performed at two different pulp to solvent mass ratios. Pulp quality parameters were also measured to determine the suitability of the pre-treatment: α-cellulose, viscosity, lignin and pentosan content. In addition, X-ray diffraction analysis of pulps at the best solid to liquid ratio was performed to obtain the influence of the crystallinity index. Best results were obtained with the use of lactic acid, with reactivity values close to 94 %, giving a reduction of CS2 usage of 15.83 %. Furthermore, a linear relationship between the crystallinity index calculated by the XRD and reactivity with a regression factor of 0.87 was found.

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Section: Effect Of Des Pre-treatment On Pulp Quality Parameterssupporting

confidence: 89%

Use of green solvents as pre-treatment of dissolving pulp to decrease CS2 consumption from viscose production

et al. 2020

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“…Both xylan and lignin removals were successfully enhanced around 25% during the treatment using ChCl-glycerol (1:2). Similar liquid hot water pretreatment was studied by Tian et al [65] for the delignification of poplar wood shavings. To provide a mutual agreement for both hemicellulose recovery and solid yield, 170°C was preferred as temperature for the hot water extraction for 40 min.…”

Section: Fractionation Of Agro-industrial Wastes With Deep Eutectic Solvents and Recovery Of Ligninmentioning

confidence: 77%

Use of Deep Eutectic Solvents in the Treatment of Agro-Industrial Lignocellulosic Wastes for Bioactive Compounds

Ünlü¹,

Takaç²

2021

Agroecosystems – Very Complex Environmental Systems

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Lignocellulose is the most abundant component in nature since it refers to plant material. Beyond the enormous utilization of lignocellulose by human being, unignorable amount of waste is also formed simultaneously. Agro-industrial lignocellulosic wastes can cause environmental pollutions if not processed before discharged. An innovative approach for lowering the detrimental influences of lignocellulosic wastes is to consider them as a source of useful products rather than a waste to be decontaminated. Beyond the conventional techniques for evaluation of the wastes, new emerging techniques and the use of new solvents have drawn attention recently. Among new generation solvents, deep eutectic solvents (DESs) have been increasingly used in the treatment of lignocellulosics to produce value-added products such as biofuels, chemicals, and solvents and also used for the recovery of bioactive phenolic compounds. DESs are used extensively for fractionation of lignocellulosic wastes, often in combination with enzymatic hydrolysis of the biomass. On the other hand, extraction and recovery of bioactive compounds are also under research using DESs. This mini review summarizes the very recent literature reports on the use of DESs in treating agro-industrial wastes within the concept of valorization of biomass.

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“…Sulfamic acid was used as a hydrog as a hydrogen bond acceptor. The original fibers were treate make the fiber swell and sulfate the hydroxyl of the cellulos cellulose fiber interior to disrupt the inter-and intra-molecul the fibers, resulting in swelling [50]. The swelling caused a gr more hydroxyl groups [51].…”

Section: The Preparation Mechanism Of Sulfated Cellulose Nanomentioning

confidence: 99%

Facile Preparation and Characteristic Analysis of Sulfated Cellulose Nanofibril via the Pretreatment of Sulfamic Acid-Glycerol Based Deep Eutectic Solvents

Xue

et al. 2021

Nanomaterials

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A deep eutectic solvent (DES) composed of sulfamic acid and glycerol allowed for the sustainable preparation of cellulose nanofibrils (CNF) with simultaneous sulfation. The reaction time and the levels of sulfamic acid demonstrated that fibers could be swelled and sulfated simultaneously by a sulfamic acid-glycerol-based DES and swelling also promoted sulfation with a high degree of substitution (0.12). The DES-pretreated fibers were further nanofibrillated by a grinder producing CNF with diameters from 10 nm to 25 nm. The crystallinity ranged from 53–62%, and CNF maintained the original crystal structure. DES pretreatment facilitated cellulose nano-fibrillation and reduced the energy consumption with a maximum reduction of 35%. The films prepared from polyvinyl alcohol (PVA) and CNF showed good UV resistance ability and mechanical properties. This facile and efficient method provided a more sustainable strategy for the swelling, functionalization and nano-fibrillation of cellulose, expanding its application to UV-blocking materials and related fields.

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Acidic deep eutectic solvents pretreatment for selective lignocellulosic biomass fractionation with enhanced cellulose reactivity

Cited by 142 publications

References 61 publications

Use of green solvents as pre-treatment of dissolving pulp to decrease CS2 consumption from viscose production

Use of green solvents as pre-treatment of dissolving pulp to decrease CS2 consumption from viscose production

Use of Deep Eutectic Solvents in the Treatment of Agro-Industrial Lignocellulosic Wastes for Bioactive Compounds

Facile Preparation and Characteristic Analysis of Sulfated Cellulose Nanofibril via the Pretreatment of Sulfamic Acid-Glycerol Based Deep Eutectic Solvents

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