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Han X, Song K, Yu H, Zhou X, Guo J. Extraction and characterisation of kudzu root residue lignin based on deep eutectic solvents. PHYTOCHEMICAL ANALYSIS : PCA 2024; 35:786-798. [PMID: 38279552 DOI: 10.1002/pca.3328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/31/2023] [Accepted: 01/03/2024] [Indexed: 01/28/2024]
Abstract
INTRODUCTION Lignin has great potential as the most abundant renewable phenolic polymer. Studies have shown that lignin structure varies depending on different sources and different extraction methods. However, there are few studies on lignin in kudzu root residue. OBJECTIVES The aim of the study was to explore optimal extraction conditions of Pueraria lobata residue lignin (PLL) with deep eutectic solvents (DESs) and characterise the structure and morphology of PLL. METHODS Firstly, the chemical composition of kudzu root residue was determined by the Van-soest method. Then, betaine was used as hydrogen bond acceptor (HBA), nine kinds of common acids and alcohol were selected as hydrogen bond donor (HBD) to synthesise a DES to extract lignin from kudzu root residue. The influence of conditions on the extraction of PLL was explored by a betaine-based DES according to a single-factor experiment, and then the best process of PLL extraction was determined by an orthogonal experiment. Finally, the morphology and structure of PLL were analysed by scanning electron microscope (SEM), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), and NMR. RESULTS Cellulose, hemicellulose, lignin, and ash content in kudzu root residue were 41.13%, 16.39%, 25.03%, and 0.41%, respectively. When the DES consisted of betaine and formic acid, the solid-liquid ratio was 1:45, the extraction time was 5.5 h at 160°C, the extraction yield of lignin was 89.29%, and the purity was 83.01%. PLL was composed of interconnected spherical particles with good thermal stability and narrow polydispersity index (PDI) distribution. FTIR and 2D-heteronuclear singular quantum correlation (HSQC) NMR illustrated that PLL was a typical G-type and S-type lignin. CONCLUSION This study would fill the gap of research on lignin in kudzu root residue and provide a theoretical reference for the utilisation of lignin in kudzu roots as well as a new thinking for the recycling of kudzu root resources.
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Affiliation(s)
- Xinran Han
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, China
| | - Ke Song
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, China
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, National and Local United Engineering Laboratory of Integrative Utilization of Eucommia ulmoides, Jishou University, Zhangjiajie, China
| | - Huazhong Yu
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, China
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, National and Local United Engineering Laboratory of Integrative Utilization of Eucommia ulmoides, Jishou University, Zhangjiajie, China
| | - Xianwu Zhou
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, China
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, National and Local United Engineering Laboratory of Integrative Utilization of Eucommia ulmoides, Jishou University, Zhangjiajie, China
| | - Jie Guo
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, China
- Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, National and Local United Engineering Laboratory of Integrative Utilization of Eucommia ulmoides, Jishou University, Zhangjiajie, China
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2
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Feng Y, Eberhardt TL, Meng F, Xu C, Pan H. Efficient extraction of lignin from moso bamboo by microwave-assisted ternary deep eutectic solvent pretreatment for enhanced enzymatic hydrolysis. BIORESOURCE TECHNOLOGY 2024; 400:130666. [PMID: 38583673 DOI: 10.1016/j.biortech.2024.130666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Applications of deep eutectic solvent (DES) systems to separate lignocellulosic components are of interest to develop environmentally friendly processes and achieve efficient utilization of biomass. To enhance the performance of a binary neutral DES (glycerol:guanidine hydrochloride), various Lewis acids (e.g., AlCl3·6H2O, FeCl3·6H2O, etc.) were introduced to synthesize a series of ternary DES systems; these were coupled with microwave heating and applied to moso bamboo. Among the ternary DES systems evaluated, the FeCl3-based DES effectively removed lignin (81.17%) and xylan (85.42%), significantly improving enzymatic digestibility of the residual glucan and xylan (90.15% and 99.51%, respectively). Furthermore, 50.74% of the lignin, with high purity and a well-preserved structure, was recovered. A recyclability experiment showed that the pretreatment performance of the FeCl3-based DES was still basically maintained after five cycles. Overall, the microwave-assisted ternary DES pretreatment approach proposed in this study appears to be a promising option for sustainable biorefinery operations.
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Affiliation(s)
- Yingying Feng
- Jiangsu CoInnovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road 210037, Nanjing, PR China
| | - Thomas L Eberhardt
- USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53726, USA
| | - Fanyang Meng
- Jiangsu CoInnovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road 210037, Nanjing, PR China
| | - Chen Xu
- Jiangsu CoInnovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road 210037, Nanjing, PR China
| | - Hui Pan
- Jiangsu CoInnovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road 210037, Nanjing, PR China.
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3
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Troncoso OP, Corman-Hijar JI, Torres FG. Lignocellulosic Biomass for the Fabrication of Triboelectric Nano-Generators (TENGs)-A Review. Int J Mol Sci 2023; 24:15784. [PMID: 37958768 PMCID: PMC10647769 DOI: 10.3390/ijms242115784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/12/2023] [Accepted: 10/18/2023] [Indexed: 11/15/2023] Open
Abstract
Growth in population and increased environmental awareness demand the emergence of new energy sources with low environmental impact. Lignocellulosic biomass is mainly composed of cellulose, lignin, and hemicellulose. These materials have been used in the energy industry for the production of biofuels as an eco-friendly alternative to fossil fuels. However, their use in the fabrication of small electronic devices is still under development. Lignocellulose-based triboelectric nanogenerators (LC-TENGs) have emerged as an eco-friendly alternative to conventional batteries, which are mainly composed of harmful and non-degradable materials. These LC-TENGs use lignocellulose-based components, which serve as electrodes or triboelectric active materials. These materials can be derived from bulk materials such as wood, seeds, or leaves, or they can be derived from waste materials from the timber industry, agriculture, or recycled urban materials. LC-TENG devices represent an eco-friendly, low-cost, and effective mechanism for harvesting environmental mechanical energy to generate electricity, enabling the development of self-powered devices and sensors. In this study, a comprehensive review of lignocellulosic-based materials was conducted to highlight their use as both electrodes and triboelectric active surfaces in the development of novel eco-friendly triboelectric nano-generators (LC-TENGs). The composition of lignocellulose and the classification and applications of LC-TENGs are discussed.
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Affiliation(s)
| | | | - Fernando G. Torres
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, Lima 15088, Peru; (O.P.T.); (J.I.C.-H.)
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4
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Mero A, Moody NR, Husanu E, Mezzetta A, D’Andrea F, Pomelli CS, Bernaert N, Paradisi F, Guazzelli L. Challenging DESs and ILs in the valorization of food waste: a case study. Front Chem 2023; 11:1270221. [PMID: 37942401 PMCID: PMC10628488 DOI: 10.3389/fchem.2023.1270221] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 10/12/2023] [Indexed: 11/10/2023] Open
Abstract
In this study, the efficacy of two of the best performing green solvents for the fractionation of lignocellulosic biomass, cholinium arginate (ChArg) as biobased ionic liquid (Bio-IL) and ChCl:lactic acid (ChCl:LA, 1:10) as natural deep eutectic solvent (NADES), was investigated and compared in the pretreatment of an agri-food industry waste, apple fibers (90°C for 1 h). For the sake of comparison, 1-butyl-3-methylimidazolium acetate (BMIM OAc) as one of the best IL able to dissolve cellulose was also used. After the pretreatment, two fractions were obtained in each case. The results gathered through FTIR and TG analyses of the two materials and the subsequent DNS assay performed after enzymatic treatment led to identify ChArg as the best medium to delignify and remove waxes, present on the starting apple fibers, thus producing a material substantially enriched in cellulose (CRM). Conversely, ChCl:LA did not provide satisfactorily results using these mild conditions, while BMIM OAc showed intermediate performance probably on account of the reduced crystallinity of cellulose after the dissolution-regeneration process. To corroborate the obtained data, FTIR and TG analyses were also performed on the residues collected after the enzymatic hydrolysis. At the end of the pretreatment, ChArg was also quantitatively recovered without significant alterations.
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Affiliation(s)
- Angelica Mero
- Department of Pharmacy, Università di Pisa, Pisa, Italy
- Consorzio INSTM, Firenze, Italy
| | - Nicholas R. Moody
- Department of Chemistry, University of Nottingham, Nottingham, United Kingdom
| | - Elena Husanu
- Department of Pharmacy, Università di Pisa, Pisa, Italy
| | - Andrea Mezzetta
- Department of Pharmacy, Università di Pisa, Pisa, Italy
- Consorzio INSTM, Firenze, Italy
| | - Felicia D’Andrea
- Department of Pharmacy, Università di Pisa, Pisa, Italy
- Consorzio INSTM, Firenze, Italy
| | | | - Nathalie Bernaert
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Technology and Food Science Unit, Melle, Belgium
| | - Francesca Paradisi
- Department of Chemistry, University of Nottingham, Nottingham, United Kingdom
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Lorenzo Guazzelli
- Department of Pharmacy, Università di Pisa, Pisa, Italy
- Consorzio INSTM, Firenze, Italy
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Chen Y, Ma C, Tang W, He YC. Comprehensive understanding of enzymatic saccharification of Betaine:Lactic acid-pretreated sugarcane bagasse. BIORESOURCE TECHNOLOGY 2023; 386:129485. [PMID: 37454960 DOI: 10.1016/j.biortech.2023.129485] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Green solvents, especially deep eutectic solvents (DESs), are widely applied to pretreat biomass for enhancing its enzymatic hydrolysis. In this work, lactic acid was selected as the hydrogen-bond-donor to prepare Betaine-base DES (Betaine:LA), The DES was utilized to pretreat sugarcane bagasse (SCB) at 160 ℃ for 80 min (severity factor LogR0 = 3.67). The influences of Betaine:LA treatment on the chemical composition, crystal and microstructure structure of cellulose, and cellulase digestion were investigated. The results showed that the lignin (47.1%) and xylan (44.6%) were removed, the cellulase digestibility of Betaine:LA-treated SCB was 4.2 times that of the raw material. This improved efficiency was attributed to the enhanced accessibility of cellulose, the weakened surface area of lignin, the declined hydrophobicity, and the decreased crystallinity of cellulose. Several compelling linear correlations were fitted between enzymatic hydrolysis and these alterations of physicochemical features, comprehensively understanding enzymatic saccharification of Betaine:LA-pretreated SCB.
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Affiliation(s)
- Ying Chen
- School of Pharmacy & School of Biological and Food Engineering, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China
| | - Cuiluan Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, PR China
| | - Wei Tang
- School of Pharmacy & School of Biological and Food Engineering, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China
| | - Yu-Cai He
- School of Pharmacy & School of Biological and Food Engineering, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, PR China.
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6
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Wang D, Liu L, Shen R, Chen Y, Diao M, Yao J. Fascinating polyphenol lignin extracted from sawdust via a green and recyclable solvent route. Int J Biol Macromol 2023; 234:123780. [PMID: 36822281 DOI: 10.1016/j.ijbiomac.2023.123780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023]
Abstract
Due to the complexity, heterogeneity and recalcitrant structure of lignin, the extraction of multifunctional lignin directly from lignocellulose is still a challenge. Here, a green and recyclable route was proposed to separate high-quality lignin and tailor its functionalities. Through tuning the components of deep eutectic solvent (DES) and separation procedures, DES extracted lignin (DESL) exhibited high purity of 99.6 %, yield of 83.2 % and phenolic hydroxyl content of 8.33 wt%. The results of FTIR and 13C NMR demonstrated that DESL possessed more oxygen-containing reactive groups compared with commercial lignin (CL), enabling DESL with more superior functional activities. DESL exhibited higher antioxidant activity with the DPPH capture rate of 73.2 %. Meanwhile, DESL showed strong bactericidal effects against E. coli (100 %) and S. aureus (100 %) due to higher phenolic hydroxyl content, which could destroy bacterial cell membranes and inhibit bacterial metabolism by interacting with phospholipid layer and protein. Additionally, DESL displayed strong UV absorption and could be blended with polyurethane to enhance UV shielding property of polyurethane composite film with >50 of UPF value. In summary, DES treatment is a suitable strategy for high-quality lignin separation, which opens a broad spectrum of possibilities for lignin valorization.
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Affiliation(s)
- Dengfeng Wang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Lin Liu
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing 312000, China.
| | - Rongsheng Shen
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yangliu Chen
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Mengyuan Diao
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Juming Yao
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; School of Materials Science and Chemical Engineering, Ningbo University, 818 Fenghua Road, Ningbo 315211, China.
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7
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Li P, Yang C, Jiang Z, Jin Y, Wu W. Lignocellulose Pretreatment by Deep Eutectic Solvents and Related Technologies: A Review. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2022. [DOI: 10.1016/j.jobab.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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8
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Preparation, characterization of light-colored lignin from corn stover by new ternary deep eutectic solvent extraction. Int J Biol Macromol 2022; 222:2512-2522. [DOI: 10.1016/j.ijbiomac.2022.10.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/26/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
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9
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Hong S, Li HY, Shen XJ, Sun SN, Sun Z, Yuan TQ. Unveiling the Migration and Transformation Mechanism of Lignin in Eucalyptus During Deep Eutectic Solvent Pretreatment. CHEMSUSCHEM 2022; 15:e202200553. [PMID: 35593890 DOI: 10.1002/cssc.202200553] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Deep eutectic solvents (DESs) have unique advantages in biomass conversion. However, the migration and transformation mechanism of lignin in the cell wall during the DES pretreatment is still elusive. In this work, Eucalyptus blocks were pretreated in choline chloride/lactic acid DES to reveal the lignin migration. Meanwhile, the remaining lignin in the pretreated residue, the regenerated DES lignin, and the solubilized degraded lignin in the recovered DES were investigated to decipher the lignin transformation. Results showed that the DES pretreatment resulted in the penetration of DES from the cell lumen to the cell wall, and lignin in the secondary wall was more easily dissolved than that in the cell corner middle lamella. The syringyl unit of lignin was better stabilized in the DES than the guaiacyl unit of lignin. The condensed lignin fraction mainly remained in the pretreated residue, while the solubilized degraded lignin fraction was monomeric aromatic ketone compounds. This study elucidates the fate of lignin during the DES pretreatment, which could also promote the development of a modern lignocellulosic pretreatment technique.
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Affiliation(s)
- Si Hong
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, P. R. China
| | - Han-Yin Li
- College of Forestry, Henan Agricultural University, Zhengzhou, Agricultural Road No. 63, 450002, P. R. China
| | - Xiao-Jun Shen
- State Key Laboratory of Catalysis (SKLC), Dalian National Laboratory for Clean Energy (DNL), Dalian, 116023, P. R. China
| | - Shao-Ni Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, P. R. China
| | - Zhuohua Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, P. R. China
| | - Tong-Qi Yuan
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, P. R. China
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10
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Extraction of lignin from corncob residue via a deep eutectic solvent for the preparation of nanoparticles by self-assembly. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Lou R, Zhang X. Evaluation of pretreatment effect on lignin extraction from wheat straw by deep eutectic solvent. BIORESOURCE TECHNOLOGY 2022; 344:126174. [PMID: 34737047 DOI: 10.1016/j.biortech.2021.126174] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/13/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
To investigate the effect of hemicellulose removal on subsequent choline chloride and lactic acid (ChCl-LA) based deep eutectic solvent (DES) extraction of wheat straw lignin, ChCL-LA of DES and hot water presoaking pretreatments were used for hemicellulose prehydrolysis. Both presoakings led to a significant hemicellulose removal and introduced morphological changes on fiber cell wall surface. DES presoaking also instigated ether bonds cleavage between lignin and hemicellulose and selectively removed lignin in compound middle lamella (CML) and cell corner (CC) leading to cell wall disruption and swelling which facilitated lignin extraction. Hot water presoaking removed more hemicellulose and caused a migration of lignin to fibers surface, but did not improve subsequent lignin extraction. This study demonstrated that a two-stage DES treatment method, presoaking at room temperature followed by extracting at an elevated temperature, is a viable process to produce high yield and purity of lignin.
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Affiliation(s)
- Rui Lou
- College of Mechanical and Electronic Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, PR China.
| | - Xiao Zhang
- Voilland School of Chemical Engineering and Bioengineering, Bioproducts, Science & Engineering Laboratory, Washington State University, Richland, WA 99354, USA
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12
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Wang W, Lee DJ. Lignocellulosic biomass pretreatment by deep eutectic solvents on lignin extraction and saccharification enhancement: A review. BIORESOURCE TECHNOLOGY 2021; 339:125587. [PMID: 34303094 DOI: 10.1016/j.biortech.2021.125587] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/11/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Biomass recalcitrance hinders efficient utilization of lignocellulosic biomass, making pretreatment process a crucial step for successful biorefinery process. Pretreatment processes have been developed for processing biomass, while technical obstacles including intensive energy requirement, high operational cost, equipment corrosions resulted from currently applied techniques promote the development of new pretreatment process for biomass. The deep eutectic solvent (DES) has been recognized as a promising solvent for biomass pretreatment, although the DES application toward biomass is still in its nascent stage. This review summarized the current researches using DES for biomass pretreatment, focusing particularly on lignin extraction and saccharification enhancement of lignocellulosic biomass. The mechanisms for biomass fractionation using DES as agents are introduced. Prospect and challenge were outlined.
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Affiliation(s)
- Wei Wang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan; Chemistry Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan; Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong.
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13
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Liang X, Zhu Y, Qi B, Li S, Luo J, Wan Y. Structure-property-performance relationships of lactic acid-based deep eutectic solvents with different hydrogen bond acceptors for corn stover pretreatment. BIORESOURCE TECHNOLOGY 2021; 336:125312. [PMID: 34044243 DOI: 10.1016/j.biortech.2021.125312] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/14/2021] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
Herein, ten types of lactic acid-based deep eutectic solvents (DESs) with differently structured hydrogen bond acceptors (HBAs) were used for corn stover pretreatment. Among the tested DESs, those composed of HBAs with short alkyl chain were more effective to remove lignin and xylan, resulting in higher enzymatic digestion of the pretreated solids than their counterparts with long alky chain. Also, functional groups of HBAs demonstrated significant effects on biomass deconstruction. In order to interpret the different pretreatment performance of the tested DESs, Kamlet-Taft solvent polarity parameters of the tested DESs were correlated to their lignocellulose pretreatment performance. It was found that hydrogen bond acidity (Kamlet-Taft α parameter) had strong positive relationships with pretreatment efficacy of the studied DESs. These findings not only clarified the structure-property-performance relationships of the DESs, but also provided novel insights into design and selection of DESs for lignocellulose pretreatment.
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Affiliation(s)
- Xinquan Liang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Yuan Zhu
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Benkun Qi
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Shiqian Li
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jianquan Luo
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yinhua Wan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
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14
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Liu F, Xue Z, Lan X, Liu Z, Mu T. CO2 switchable deep eutectic solvents for reversible emulsion phase separation. Chem Commun (Camb) 2021; 57:627-630. [DOI: 10.1039/d0cc06963a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CO2 switchable imidazole-based deep eutectic solvents (DESs) were formed and used for reversible phase separation of emulsions generated between DESs and oil.
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Affiliation(s)
- Feijie Liu
- College of Materials Science and Technology
- Beijing Forestry University
- Haidian
- China
- Department of Chemistry
| | - Zhimin Xue
- College of Materials Science and Technology
- Beijing Forestry University
- Haidian
- China
| | - Xue Lan
- Department of Chemistry
- Renmin University of China
- Haidian
- China
| | - Zhenghui Liu
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang
- China
| | - Tiancheng Mu
- Department of Chemistry
- Renmin University of China
- Haidian
- China
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15
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Yin Q, Wang M, Fang D, Zhu Y, Yang L. Novel N,Cl-doped deep eutectic solvents-based carbon dots as a selective fluorescent probe for determination of morphine in food. RSC Adv 2021; 11:16805-16813. [PMID: 35479173 PMCID: PMC9031561 DOI: 10.1039/d1ra00886b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/29/2021] [Indexed: 12/29/2022] Open
Abstract
In the present study, new N,Cl co-doped carbon dots (N,Cl-CDs) based on deep eutectic solvent (DES) were fabricated by a facile hydrothermal process. This fluorescent probe exhibited a good quantum yield of 14% and was applied for the sensitive and selective quantification of morphine in foods. In addition, the influence of solution pH, interaction time, system temperature, interfering substances and analogues on the determination was also investigated. Under the optimized conditions, the luminescence intensity of carbon dots increased linearly with the addition of morphine in the concentration range of (0.15–280.25) μg mL−1 (R2 > 0.9969) and the limit of detection (LOD) of 46.5 ng mL−1. Based on these results, it is suggested that N,Cl-CDs is a promising fluorescent probe for sensitive and selective quantification of morphine in foods. A schematic illustrating the synthesis and morphine detection of N,Cl-CDs.![]()
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Affiliation(s)
- Qinhong Yin
- Faculty of Drug Control
- Yunnan Police College
- Kunming 650223
- China
| | - Mengtao Wang
- Faculty of Materials Science and Engineering
- Kunming University of Science and Technology
- Kunming
- China
| | - Dong Fang
- Faculty of Materials Science and Engineering
- Kunming University of Science and Technology
- Kunming
- China
| | - Yanqin Zhu
- Research Center for Analysis and Measurement
- Kunming University of Science and Technology
- Kunming 650093
- China
| | - Lihua Yang
- Faculty of Drug Control
- Yunnan Police College
- Kunming 650223
- China
| |
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