Choline chloride based deep eutectic solvents for the lignocellulose nanofibril production from Mongolian oak (Quercus mongolica)

Kwon, Gu-Joong; Bandi, Rajkumar; Yang, Bong-Suk; Park, Chanwoo; Han, Sang‐Ik; Park, Ji-Soo; Lee, Eun-Ah; Kim, Namhun; Lee, Seung Hwan

doi:10.1007/s10570-021-04102-3

Cited by 19 publications

(6 citation statements)

References 43 publications

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“…It can be seen that temperature has a much greater in uence than mole ratio. This nding is in accordance with those previous studies (Kwon et al 2021). Using MW, the reduction of cellulose, hemicellulose, and lignin contents was negligible until 100 s and were greatly reduced at 110 s, which matches the trend in solid residue yield.…”

Section: Chemical Compositionsupporting

confidence: 93%

“…An extensive molecular library of HBDs and HBAs for DES production has been compiled (Zdanowicz et al 2018;Satlewal et al 2018). Among them, DESs based on choline chloride (ChCl) and lactic acid (LA) have been extensively studied, and the literature suggests that ChCl-LA-based DES pretreatment is an e cient method to extract lignin from biomass (Kwon et al 2020(Kwon et al , 2021Liu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Production of lignocellulose nanofibrils by conventional and microwave-assisted deep-eutectic-solvent pretreatments: mechanical, antioxidant, and UV-blocking properties

et al. 2023

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Herein for the rst time, lignocellulose nano brils (LCNF) were prepared from pine-wood powder using microwave (MW)-assisted deep eutectic solvent (DES) pretreatment coupled with high-pressure homogenization. A DES based on choline chloride and lactic acid was employed, and LCNFs prepared by conventional DES pretreatment at 110°C (LCNF-110) and 130°C (LCNF-130) were used for comparison.Although MW treatment offered a high removal of lignin (70%) and hemicellulose (90%) within a short time (110 s), the morphological observations by scanning and transmission electron microscopies revealed excellent de brillation of the conventionally heat-treated samples. Likewise, LCNF-110 and LCNF-130 exhibited high tensile strengths of 154.6 ± 5.0 and 136.8 ± 1.2 MPa, respectively, whereas that of LCNF-MW was only 75.6 ± 1.4 MPa. Interestingly, LCNF-MW with a lignin content between that of LCNF-110 and LCNF-130 exhibited high thermal stability (T max 309.6°C) and potent antioxidant properties.However, the lignin contents of the LCNFs determined their UV-radiation blocking e ciency, where LCNF-110 > LCNF-MW > LCNF-130. Furthermore, all LCNF lms exhibited good visible-light transparency, exibility, and water contact angles (> 87°), indicating their promising potential for packaging applications.

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Section: Chemical Compositionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Production of lignocellulose nanofibrils by conventional and microwave-assisted deep-eutectic-solvent pretreatments: mechanical, antioxidant, and UV-blocking properties

et al. 2023

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“…At the optimum ChCl/G ratio of 1:2, the lignin removal was only 28.98 ± 1.23%, which is the lowest compared to other DES types (Table 1), indicating that ChCl/G is less effective in removing lignin from sugarcane leaves. This is because ChCl/G has a neutral pH (6.4-7.93), making the ChCl/G solution less efficient at eliminating lignin [42].…”

Section: Effects Of Molar Ratio and Type Of Deep Eutectic Solvent (De...mentioning

confidence: 99%

Biohydrogen and Methane Production from Sugarcane Leaves Pretreated by Deep Eutectic Solvents and Enzymatic Hydrolysis by Cellulolytic Consortia

et al. 2022

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This study determined the optimal conditions for the deep eutectic solvent (DES) pretreatment of sugarcane leaves and the best fermentation mode for hydrogen and methane production from DES-pretreated sugarcane leaves. Choline chloride (ChCl):monoethanolamine (MEA) is the most effective solvent for removing lignin from sugarcane leaves. The optimum conditions were a ChCl: MEA molar ratio of 1:6, 120 °C, 3 h, and substrate-to-DES solution ratio of 1:12. Under these conditions, 86.37 ± 0.36% lignin removal and 73.98 ± 0.42% hemicellulose removal were achieved, whereas 84.13 ± 0.77% cellulose was recovered. At a substrate loading of 4 g volatile solids (VS), the simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF) processes yielded maximum hydrogen productions of 3187 ± 202 and 2135 ± 315 mL H2/L, respectively. In the second stage, methane was produced using the hydrogenic effluent. SSF produced 5923 ± 251 mL CH4/L, whereas SHF produced 3583 ± 128 mL CH4/L. In a one-stage methane production process, a maximum methane production of 4067 ± 320 mL CH4/L with a substrate loading of 4 g VS was achieved from the SSF process. SSF proved to be more efficient than SHF for producing hydrogen from DES-pretreated sugarcane leaves in a two-stage hydrogen and methane production process as well as a one-stage methane production process.

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“…A two-step ultrasonication process resulted in lignin-containing CNF and CNC fractions with the yield of 59.1 wt %. Mongolian oak was used by Kwon et al (2021) as a starting material for the production of lignocellulosic nanofibrils (LCNFs) applying DES pretreatment and mechanical defibrillation. Lactic acid (carboxyl HBD), glycerol (hydroxyl HBD), and urea (amide HBD) were selected as HBDs, and choline chloride was used as HBA.…”

Section: Production Of Lignin-containing Cellulose Nanofibrils/cellul...mentioning

confidence: 99%

The role of deep eutectic solvents in the production of cellulose nanomaterials from biomass

Jančíková

Jablonský

2022

Acta Chimica Slovaca

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In recent years, the demand for environment-friendly products has been on an increasing trend among researchers and industry for sustainable development. Deep eutectic solvents are green solvents which, due to their properties (biodegradability, recyclability, low cost, availability, easy preparation, low toxicity, chemical and thermal stability), can be used in various fields such as polymer chemistry, which includes nanocellulose isolation and polysaccharides processing. Several studies have illustrated the effectiveness of using deep eutectic solvents instead of the conventional reaction system to produce and disperse nanomaterials. This work summarizes the use of deep eutectic solvents in the isolation of cellulosic nanomaterials from different types of biomass. Deep eutectic solvents demonstrate high effectiveness in swelling lignocellulosic biomass and producing cellulose nanomaterials. Overall, deep eutectics solvents represent an innovative and effective pretreatment process for the fractionation of raw cellulose-containing fibres to promote subsequent isolation of nanomaterials made from cellulose.

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Choline chloride based deep eutectic solvents for the lignocellulose nanofibril production from Mongolian oak (Quercus mongolica)

Cited by 19 publications

References 43 publications

Production of lignocellulose nanofibrils by conventional and microwave-assisted deep-eutectic-solvent pretreatments: mechanical, antioxidant, and UV-blocking properties

Production of lignocellulose nanofibrils by conventional and microwave-assisted deep-eutectic-solvent pretreatments: mechanical, antioxidant, and UV-blocking properties

Biohydrogen and Methane Production from Sugarcane Leaves Pretreated by Deep Eutectic Solvents and Enzymatic Hydrolysis by Cellulolytic Consortia

The role of deep eutectic solvents in the production of cellulose nanomaterials from biomass

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