1
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Xu E, Yu H, Wu W, Ji B, Feng X, Xu H, Zhong Y, Wang B, Mao Z. Preparation of high antioxidant nanolignin and its application in cosmetics. Int J Biol Macromol 2024; 272:132635. [PMID: 38797295 DOI: 10.1016/j.ijbiomac.2024.132635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/17/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
Lignin, as a natural polyphenol, displays anti-oxidant activity by trapping and binding free radicals through its free phenolic hydroxyl groups. However, the most accessible form, industrial lignins, generally has low phenolic hydroxyl content, which severely limits their application value and scenarios. Herein, we showed that potassium-glycerate deep eutectic solvent (PG-DES) treatment can be combined with laccase oxidation to afford prepared high antioxidant lignin nanoparticles (HA-LNPs) with notably improved anti-oxidant activities benefiting from both the enhanced phenolic hydroxyl content 170.8 % and reduced average particle size (59.0 nm). At concentrations as low as 60 μg/mL, HA-LNPs showed favorable effects in promoting collagen formation. When HA-LNPs were used as an active ingredient in the anti-aging mask formulation, the reactive oxygen species (ROS) scavenging activity of mask samples containing 0.4 % HA-LNPs reached 37.2 %. The data suggest great promise of HA-LNPs as a natural antioxidant for formulating in anti-aging skin care products.
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Affiliation(s)
- Enhui Xu
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Hainan Yu
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Wei Wu
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Bolin Ji
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Xueling Feng
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology of Donghua University, Shanghai 201620, China
| | - Hong Xu
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Yi Zhong
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Bijia Wang
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology of Donghua University, Shanghai 201620, China.
| | - Zhiping Mao
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology of Donghua University, Shanghai 201620, China; National Dyeing and Finishing Engineering Technology Research Center, Donghua University, Shanghai 201620, China.
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2
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Zourif A, Chajii O, Chemchame Y, Benbiyi A, Azoubi Z, El Guendouzi M, El Bouari A. High extraction and excellent anti-UV and anti-oxidant proprieties of lignin from Reseda Luteola L. waste by organosolv process. Int J Biol Macromol 2024; 268:131624. [PMID: 38642685 DOI: 10.1016/j.ijbiomac.2024.131624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/06/2024] [Accepted: 04/13/2024] [Indexed: 04/22/2024]
Abstract
Lignin is an abundant natural biopolymer found in plant cell walls. Lignin can come from tinctorial plants, whose residual biomass after dye extraction was typically discarded as waste. The main objective of this study was to extract lignin from the residual biomass of Reseda luteola L. using an organosolv process and to optimize the extraction conditions. The extracted lignin was characterized, and its potential applications as an antimicrobial, anti-oxidant, and anti-UV agent were investigated. Response surface methodology based on a Box-Behnken design was employed to optimize the lignin extraction conditions (organic acid concentration, material-to-liquid ratio, extraction time). The extracted lignin was comprehensively characterized using NMR, FTIR, XRD, SEM-EDX, TGA, DSC, and UV-Vis techniques. The optimal extraction conditions yielded a remarkably high lignin recovery of 62.41 % from the plant waste, which was rarely achieved for non-wood plants in previous works. The extracted lignin exhibited excellent thermal stability and radical scavenging anti-oxidant activity but no significant antimicrobial effects. Treating wool fabrics with lignin nanoparticles substantially enhanced UV protection from the "good" to "excellent" category based on the UPF rating. This sustainable valorization approach converted abundant tinctorial plant waste into high-purity lignin with promising anti-oxidant and UV-blocking properties suitable for various applications.
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Affiliation(s)
- Ali Zourif
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco
| | - Oumaima Chajii
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco
| | - Younes Chemchame
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco; Department of Traditional Weaving, Academy of Traditional Arts, Foundation of Hassan II Mosque, Casablanca, Morocco
| | - Asmaa Benbiyi
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco.
| | - Zineb Azoubi
- Laboratory of Physiopathology and Molecular Genetics, Faculty of Sciences Ben M'Sick, University of Hassan II, Casablanca, Morocco
| | - Mohamed El Guendouzi
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco
| | - Abdeslam El Bouari
- Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco
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3
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Zhu Y, Li H, Zhao QS, Zhao B. Effect of DES lignin incorporation on physicochemical, antioxidant and antimicrobial properties of carboxymethyl cellulose-based films. Int J Biol Macromol 2024; 263:130294. [PMID: 38382790 DOI: 10.1016/j.ijbiomac.2024.130294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 02/15/2024] [Accepted: 02/17/2024] [Indexed: 02/23/2024]
Abstract
Herein, three pretreated grapevine lignins were incorporated into carboxymethyl cellulose films. The effects of traditional NaOH pretreated lignin and DES (ChCl-LA, ChCl-LA & K2CO3-EG) pretreated lignin on film properties were compared. Modern analytical techniques were employed to systematically characterize the pretreated lignin and the different CMC-lignin films. The results showed that DES lignin was of high purity, low molecular weight, and homogeneous structure. It outperformed traditional NaOH lignin in terms of compatibility with CMC, enabling it to perform its bioactivity and physicochemical functions in films. This feature effectively enhanced the hydrophobicity, UV shielding ability, water vapor barrier, thermal stability, mechanical properties, and biological activity of CMC-DES lignin film. NMR (2D HSQC) showed that the excellent antioxidant and antibacterial capabilities of CMC-DES lignin film are due to the retention of butyl (S) and p-hydroxyphenyl (H) units in DES lignin, resulting in its rich phenolic hydroxyl content. The detailed structural elucidation of DES lignin's chemical interactions with CMC provided valuable insights into the advantageous properties observed in the films, presenting innovative solutions for applications in the food packaging and preservation industries.
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Affiliation(s)
- Yuan Zhu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Hang Li
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Qing-Sheng Zhao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Bing Zhao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
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4
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Li Y, Chen M, Liu H, Zhang D, Shi QS, Xie XB, Guo Y. Antimicrobial Peptide-Inspired Design of Amino-Modified Lignin with Improved Antimicrobial Activities. Biomacromolecules 2023; 24:5381-5393. [PMID: 37908117 DOI: 10.1021/acs.biomac.3c00841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
A major challenge to make use of lignin as an antimicrobial material is the weak antimicrobial activity of industrial lignin. Inspired by the antimicrobial mechanism of actions of antimicrobial peptides, alkyldiamines were employed as lysine mimics for lignin modifications. Accordingly, aminoalkyl-modified lignins with different degrees of substitution of amino groups and different hydrophobicity were synthesized. The chemical structure, properties, and antimicrobial activities of the as-prepared aminoalkyl lignins were thoroughly characterized with state-of-the-art technologies. The results indicated that aminobutyl lignin showed enhanced antimicrobial activity against S. aureus and E. coli and performed even better than copper ions. The antimicrobial mechanism of action of the as-prepared aminobutyl lignin was similar to that of polylysine, which damaged the cell membrane, leading to the leakage of intracellular molecules and death of the cell. This study provides a feasible approach to afford modified lignin with enhanced antimicrobial performance, which would facilitate the high-value valorization of lignin as biological materials.
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Affiliation(s)
- Yan Li
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Mingjie Chen
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Huiming Liu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Dandan Zhang
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Qing-Shan Shi
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Xiao-Bao Xie
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Yanzhu Guo
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
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5
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Kong Y, Xu J, Zhou J, Wang X. A universal approach for producing lignin-based monocomponent fiber by one-step ethanol fractionation. Int J Biol Macromol 2023; 242:124751. [PMID: 37164137 DOI: 10.1016/j.ijbiomac.2023.124751] [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: 04/05/2023] [Revised: 04/25/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
To achieve sustainable whole process of carbon-fiber production and high-value utilization of lignin, one-step ethanol fractionation followed by coaxial electrospinning was applied to produce lignin-based monocomponent carbon-fiber. To elucidate the mechanism, hydrothermal extracted poplar lignin (HPL) were obtained to be divide into two parts through ethanol fractionation, in which the ethanol-soluble lignin (ESL) was eletrcospun into fiber precursors. Then, to verify the universality of this method, four more lignin were extracted to produce fiber precursors, after which five kinds of carbon fibers were prepared by carbonization of the corresponding precursors. Structural analysis showed that ESL of HPL is a small and highly branched three-dimensional stereomolecules. Combined with the SEM results of fiber precursors, the mechanism which hydrogen bonding promotes fiber formation was elucidated. Among all five samples, carbon-fiber prepared from HPL possesses the minimum fiber diameter of 557 nm, the smallest interplanar spacing of 0.3909 nm, ID/IG value of 0.6345 and the largest specific surface area of 408.15 m2/g. This work proposes a universal method to prepare lignin-based monocomponent carbon-fiber, in which carbon-fibers prepared from HPL exhibits the best comprehensive performance and can be applied to capture radioactive iodine.
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Affiliation(s)
- Yue Kong
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jingyu Xu
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jinghui Zhou
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xing Wang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
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6
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Du B, Li W, Zhu H, Xu J, Wang Q, Shou X, Wang X, Zhou J. A functional lignin for heavy metal ions adsorption and wound care dressing. Int J Biol Macromol 2023; 239:124268. [PMID: 37003375 DOI: 10.1016/j.ijbiomac.2023.124268] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/15/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
Recently, the application of lignin activation by demethylation to improve reactivity and enrich multiple functions has intensively attracted attention. However, it is still challenge up to now due to the low reactivity and complexity of lignin structure. Here, an effective demethylation way was explored by microwave-assisted method for substantially enhancing the hydroxyl (-OH) content and retaining the structure of lignin. Then, the optimum demethylated lignin was used to removal heavy metal ions and promote wound healing, respectively. In detail, for microwave-assisted demethylated poplar lignin (M-DPOL), the contents of phenolic (Ar-OH) and total hydroxyl (Tot-OH) groups reached the maximum for 60 min at 90 °C in DMF with 7.38 and 9.13 mmol/g, respectively. After demethylation, with this M-DPOL as lignin-based adsorbent, the maximum adsorption capacity (Qmax) for Pb2+ ions reached 104.16 mg/g. Based on the isotherm, kinetic and thermodynamic models analyses, the chemisorption occurred in monolayer on the surface of M-DPOL, and all adsorption processes were endothermic and spontaneous. Meanwhile, M-DPOL as a wound dressing had excellent antioxidant property, outstanding bactericidal activity and remarkable biocompatibility, suggesting that it did not interfere with cell proliferation. Besides, the wounded rats treated with M-DPOL significantly promoted its formation of re-epithelialization and wound healing of full-thickness skin defects. Overall, microwave-assisted method of demethylated lignin can offer great advantages for heavy metal ions removal and wound care dressing, which facilitates high value application of lignin.
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Affiliation(s)
- Boyu Du
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, China
| | - Wanjing Li
- Department of Cardiology, Shaanxi Province People's Hospital and The Third Affiliated Hospital Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi Province 710018, China
| | - Hongwei Zhu
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, China
| | - Jingyu Xu
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, China
| | - Qingyu Wang
- Institute for Catalysis (ICAT) and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21W10, Kita-ku, Sapporo 001-0021, Japan
| | - Xiling Shou
- Department of Cardiology, Shaanxi Province People's Hospital and The Third Affiliated Hospital Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi Province 710018, China.
| | - Xing Wang
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, China.
| | - Jinghui Zhou
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, China.
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7
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Zhu Y, Yang TX, Qi BK, Li H, Zhao QS, Zhao B. Acidic and alkaline deep eutectic solvents (DESs) pretreatment of grapevine: Component analysis, characterization, lignin structural analysis, and antioxidant properties. Int J Biol Macromol 2023; 236:123977. [PMID: 36906200 DOI: 10.1016/j.ijbiomac.2023.123977] [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: 01/09/2023] [Revised: 02/26/2023] [Accepted: 03/04/2023] [Indexed: 03/12/2023]
Abstract
Deep eutectic solvents (DESs) have been extensively applied to pretreat lignocellulose; however, comparative research on acidic and alkaline DES pretreatment is relatively lacking. Herein, pretreatment of grapevine agricultural by-products with seven DESs were compared in terms of removal of lignin and hemicellulose and component analysis of the pretreated residues. Among the tested DESs, both acidic choline chloride-lactic (CHCl-LA), and alkaline potassium carbonate-ethylene glycol (K2CO3-EG) were effective in delignification. Thereafter, the CHCl-LA and K2CO3-EG extracted lignin was compared by analyzing their physicochemical structure changes and antioxidant properties. The results showed that the thermal stability, molecular weight, and phenol hydroxyl percentage of CHCl-LA lignin were inferior to K2CO3-EG lignin. It was found that the high antioxidant activity of K2CO3-EG lignin was mainly attributed to the abundant phenol hydroxyl, guaiacyl (G), and para-hydroxy-phenyl (H). By comparing acidic and alkaline DES pretreatments and their lignin nuances in biorefining, novel insights are derived for the scheduling and selection of DES for lignocellulosic pretreatment.
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Affiliation(s)
- Yuan Zhu
- 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, China
| | - Tian-Xiao Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Department of Biomedicine, Beijing City University, Beijing 100094, PR China
| | - Ben-Kun Qi
- 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, China
| | - Hang 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, China
| | - Qing-Sheng Zhao
- 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, China.
| | - Bing Zhao
- 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, China.
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8
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Cassoni AC, Costa P, Mota I, Vasconcelos MW, Pintado M. Recovery of lignins with antioxidant activity from Brewer’s spent grain and olive tree pruning using deep eutectic solvents. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.01.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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9
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Rabelo SC, Nakasu PYS, Scopel E, Araújo MF, Cardoso LH, Costa ACD. Organosolv pretreatment for biorefineries: Current status, perspectives, and challenges. BIORESOURCE TECHNOLOGY 2023; 369:128331. [PMID: 36403910 DOI: 10.1016/j.biortech.2022.128331] [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: 09/27/2022] [Revised: 11/08/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
Biorefineries integrate processes for the sustainable conversion of biomass into chemicals, materials, and bioenergy so that resources are optimized and effluents are minimized. Despite the vast potential of lignocellulosic biorefineries, their success depends heavily on effective, economically viable, and sustainable biomass fractionation. Although efficient, organosolv pretreatment still faces challenges that must be overcome for its widespread utilization, mainly related to solvent type and recycling, robustness regarding biomass type and integration of hemicellulose recovery and use. This review shows the recent advances and state-of-the-art of organosolv pretreatment, discussing the advances, such as the use of biobased solvents, whilst also shedding light on the perspectives of using the streams - cellulose, hemicellulose, and lignin - to produce biofuels and products of high added value. In addition, it presents an overview of the existing industrial implementations of organosolv processes and, lastly, shows the main scientific and industrial challenges and opportunities for this process.
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Affiliation(s)
- Sarita Cândida Rabelo
- School of Agriculture, São Paulo State University (Unesp), Botucatu Campus, Botucatu, São Paulo, Brazil.
| | | | - Eupídio Scopel
- Institute of Chemistry, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil
| | | | - Luiz Henrique Cardoso
- School of Agriculture, São Paulo State University (Unesp), Botucatu Campus, Botucatu, São Paulo, Brazil; Institute of Biosciences, São Paulo State University (Unesp), Botucatu Campus, Botucatu, São Paulo, Brazil
| | - Aline Carvalho da Costa
- Chemical Engineering School in State University of Campinas (Unicamp), Campinas, São Paulo, Brazil
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10
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Yang Y, Xu J, Kong Y, Zhou J, Wang X. Breakthrough of lignin valorization: A novel alcohol-dichoromethane binary mixture solvent for lignin dissolution with excellent properties. Int J Biol Macromol 2023; 225:219-226. [PMID: 36343839 DOI: 10.1016/j.ijbiomac.2022.10.252] [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: 08/26/2022] [Revised: 10/20/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
A novel binary solvent system consisting of alcohols (e.g., methanol, ethanol, isopropanol) and dichloromethane was developed as an efficient dissolution system for dissolving various types of lignin. It was found that in this dissolution system, adjusting the volume ratio of alcohol and dichloromethane will significantly affect the solubility of lignin. At the same time, this study proposed that the reason why the solvent can dissolve lignin was the hydrophobic skeleton and hydrophilic groups can be solvated by dichloromethane and alcohols respectively, which significantly promoted the dissolution of lignin. Furthermore, the solvent did not significantly alter the structure of the lignin. The proposed novel solvent is simple, efficient, versatile and flexible, can adapt to the high diversity of lignin, and has broad application prospects.
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Affiliation(s)
- Yingying Yang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jingyu Xu
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Yue Kong
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jinghui Zhou
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Xing Wang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
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11
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Maltari R, Kontro J, Koivu K, Farooq M, Mikkilä J, Zhang R, Hildén K, Sipilä J, Nousiainen PA. Fractionation of Technical Lignin from Enzymatically Treated Steam-Exploded Poplar Using Ethanol and Formic Acid. ACS APPLIED POLYMER MATERIALS 2022; 4:9388-9398. [PMID: 36532889 PMCID: PMC9748740 DOI: 10.1021/acsapm.2c01665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/11/2022] [Indexed: 06/01/2023]
Abstract
Lignocellulosic biorefineries produce lignin-rich side streams with high valorization potential concealed behind their recalcitrant structure. Valorization of these residues to chemicals, materials, and fuels increases the profitability of biorefineries. Fractionation is required to reduce the lignins' structural heterogeneity for further processing. We fractionated the technical biorefinery lignin received after steam explosion and saccharification processes. More homogeneous lignin fractions were produced with high β-O-4' and aromatic content without residual carbohydrates. Non-toxic biodegradable organic solvents like ethanol and formic acid were used for fractionation and can be adapted to the existing biorefinery processes. Macromolecular properties of the isolated fractions were carefully characterized by structural, chemical, and thermal methods. The ethanol organosolv treatment produced highly soluble lignin with a reasonable yield, providing a uniform material for lignin applications. The organosolv fractionation with formic acid and combined ethanol-formic acid produced modified lignins that, based on thermal analysis, are promising as thermoresponsive materials.
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Affiliation(s)
- Riku Maltari
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
- Department
of Microbiology, University of Helsinki, P.O. Box 56, Viikinkaari 9, Helsinki FI-00014, Finland
| | - Jussi Kontro
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
| | - Klaus Koivu
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
| | - Muhammad Farooq
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo FI-02150, Finland
| | - Joona Mikkilä
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
- Department
of Microbiology, University of Helsinki, P.O. Box 56, Viikinkaari 9, Helsinki FI-00014, Finland
| | - Rui Zhang
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
| | - Kristiina Hildén
- Department
of Microbiology, University of Helsinki, P.O. Box 56, Viikinkaari 9, Helsinki FI-00014, Finland
| | - Jussi Sipilä
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
| | - Paula A. Nousiainen
- Department
of Chemistry, University of Helsinki, P.O. Box 55, A. I. Virtasen Aukio
1, Helsinki FI-00014, Finland
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo FI-02150, Finland
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12
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Parchami M, Agnihotri S, Taherzadeh MJ. Aqueous ethanol organosolv process for the valorization of Brewer's spent grain (BSG). BIORESOURCE TECHNOLOGY 2022; 362:127764. [PMID: 35985459 DOI: 10.1016/j.biortech.2022.127764] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/05/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Brewers spent grain (BSG), the main solid byproduct of brewing, is annually generated by ca 37 million tons worldwide, which due to limited application, mostly ends up in landfills. This study aims to separate BSG's fractions (lignin, cellulose, and hemicellulose) by ethanol organosolv pretreatment. Lignin-rich fractions were recovered using a two-step separation technique. The effects of temperature, retention time, and ethanol concentration on the quantity and quality of fractions were studied. The temperature considerably impacted the quality and quantity of obtained fractions, while other parameter effects greatly depended on the temperature. Substantial hemicellulose removal (90 %) along with lignin removal (56 %) and recovery (57 %) were obtained at 180 °C. The highest lignin purity (95 %) was obtained at the pretreatment conditions of 180 °C, 120 min, and 50 % ethanol concentration. This work provides an alternative route for BSG utilization, mitigating its environmental impact while enhancing the economy of a brewery.
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Affiliation(s)
- Mohsen Parchami
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
| | - Swarnima Agnihotri
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
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13
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Cassoni AC, Costa P, Vasconcelos MW, Pintado M. Systematic review on lignin valorization in the agro-food system: From sources to applications. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115258. [PMID: 35751227 DOI: 10.1016/j.jenvman.2022.115258] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Lignocellulosic biomass is the most abundant renewable resource on earth and currently most of this biomass is considered a low-value waste. Specifically, lignin is an underrated bioresource that is mostly burned for energy production and few value-added products have been created. Since the agro-food industry produces large amounts of wastes that can be potential sources of high-quality lignin, scientific efforts should be directed to this industry. Thus, this review provides a systematic overview of the trends and evolution of research on agro-food system-derived lignin (from 2010 to 2020), including the extraction of lignin from various agro-food sources and emergent applications of lignin in the agro-food chain. Crops with the highest average production/year (n = 26) were selected as potential lignin sources. The extraction process efficiency (yield) and lignin purity were used as indicators of the raw material potential. Overall, it is notable that research interest on agro-food lignin has increased exponentially over the years, both as source (567%) and application (128%). Wheat, sugarcane, and maize are the most studied sources and are the ones that render the highest lignin yields. As for the extraction methods used, alkaline and organosolv methods are the most employed (∼50%). The main reported applications are related to lignin incorporation in polymers (∼55%) and as antioxidant (∼24%). Studies on agro-food system-derived lignin is of most importance since there are numerous possible sources that are yet to be fully valorized and many promising applications that need to be further developed.
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Affiliation(s)
- Ana C Cassoni
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - Patrícia Costa
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - Marta W Vasconcelos
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal
| | - Manuela Pintado
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005, Porto, Portugal.
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14
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Pongchaiphol S, Suriyachai N, Hararak B, Raita M, Laosiripojana N, Champreda V. Physicochemical characteristics of organosolv lignins from different lignocellulosic agricultural wastes. Int J Biol Macromol 2022; 216:710-727. [PMID: 35803411 DOI: 10.1016/j.ijbiomac.2022.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/22/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022]
Abstract
Lignin is a promising alternative to petrochemical precursors for conversion to industrial-needed products. Organosolv lignins were extracted from different agricultural wastes including sugarcane bagasse (BG) and trash (ST), corncob (CC), eucalyptus wood (EW), pararubber woodchip (PRW), and palm wastes (palm kernel cake (PKC), palm fiber (PF), and palm kernel shell (PKS), representing different groups of lignin origins. Physicochemical characteristics of lignins were analyzed by several principal techniques. Most recovered lignin showed high purity of >90 % with trace sugar contamination, while lower purities were found for lignin from palm wastes. Hardwood lignins (EW and PRW) mainly contained guaiacyl (G) and syringyl (S) units with a minor fraction of p-hydroxyphenyl units (H) with high molecular weight, glass transition temperature, phenolic hydroxy group and low aliphatic hydroxy group. Grass-type lignins (BG, ST, CC) and palm lignins (PKC, PF, and PKS) contained three monolignols of H, G, and S units with lower molecular weights and C5-substituted hydroxy of S unit. Among the grass-type lignins, PKC lignin contained the highest nitrogen and lipophilic components with the lowest molecular weight, thermal stability, and glass transition temperature. This provides insights into properties of organosolv lignin as basis for their further applications in chemical, polymer and material industries.
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Affiliation(s)
- Suchat Pongchaiphol
- The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok 10140, Thailand; BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand
| | - Nopparat Suriyachai
- BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand; School of Energy and Environment, University of Phayao, Tambon Maeka, Amphur Muang, Phayao 56000, Thailand
| | - Bongkot Hararak
- National Metal and Materials Technology Center (MTEC), 114 Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand
| | - Marisa Raita
- The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok 10140, Thailand; BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand.
| | - Navadol Laosiripojana
- The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok 10140, Thailand; BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand
| | - Verawat Champreda
- Biorefinery Technology and Bioproducts Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand; BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani 12120, Thailand
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15
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Pei W, Deng J, Wang P, Wang X, Zheng L, Zhang Y, Huang C. Sustainable lignin and lignin-derived compounds as potential therapeutic agents for degenerative orthopaedic diseases: A systemic review. Int J Biol Macromol 2022; 212:547-560. [PMID: 35643155 DOI: 10.1016/j.ijbiomac.2022.05.152] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/13/2022] [Accepted: 05/22/2022] [Indexed: 12/12/2022]
Abstract
Lignin, the most abundant natural and sustainable phenolic compound in biomass, has exhibited medicinal values due to its biological activities decided by physicochemical properties. Recently, the lignin and its derivatives (such as lignosulfonates and lignosulfonate) have been proven efficient in regulating cellular process and the extracellular microenvironment, which has been regarded as the key factor in disease progression. In orthopaedic diseases, especially the degenerative diseases represented by osteoarthritis and osteoporosis, excessive activated inflammation has been proven as a key stage in the pathological process. Due to the excellent biocompatibility, antibacterial and antioxidative activities of lignin and its derivatives, they have been applied to stimulate cells and restore the uncoupling bone remodeling in the degenerative orthopaedic diseases. However, there is a lack of a systemic review to state the current research actuality of lignin and lignin-derived compounds in treating degenerative orthopaedic diseases. Herein, we summarized the current application of lignin and lignin-derived compounds in orthopaedic diseases and proposed their possible therapeutic mechanism in treating degenerative orthopaedic diseases. It is hoped this work could guide the future preparation of lignin/lignin-derived drugs and implants as available therapeutic strategies for clinically degenerative orthopaedic diseases.
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Affiliation(s)
- Wenhui Pei
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Junping Deng
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Peng Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Xucai Wang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Liming Zheng
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China.
| | - Yangheng Zhang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
| | - Caoxing Huang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
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16
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Lu X, Gu X, Shi Y. A review on lignin antioxidants: Their sources, isolations, antioxidant activities and various applications. Int J Biol Macromol 2022; 210:716-741. [PMID: 35526770 DOI: 10.1016/j.ijbiomac.2022.04.228] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/13/2022] [Accepted: 04/29/2022] [Indexed: 12/14/2022]
Abstract
Lignin, a biopolymer obtained from agricultural/forestry residues or paper pulping wastewater, is rich in aromatic structure, which is central to its adoption as a candidate to natural antioxidants. Through insight into its structural features from biomass, different functional groups would influence lignin antioxidant activity, wherein phenolic content is the most important factor, hence massive studies have focused on its improvement via different pretreatments and post-processing methods. Besides, lignin nanoparticles and chemical modifications are also efficient methods to improve antioxidant activity via increasing free content and decreasing bond dissociation enthalpy of phenolic hydroxyl. Lignin samples exhibit comparable radicals scavenging ability to commercial ones, showing their potential as renewable alternatives of synthesized antioxidants. Besides, their applications have also been discussed, which demonstrates lignin potential as an inexpensive antioxidant additive and consequent improvements on multiple functionalities. This review is dedicated to summarize lignin antioxidants extracted from biomass resources, methods to improve their antioxidant activity and their applications, which is beneficial for realizing lignin valorization.
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Affiliation(s)
- Xinyu Lu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products, College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Xiaoli Gu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products, College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China.
| | - Yijun Shi
- Division of Machine Elements, Luleå University of Technology, SE97187 Luleå, Sweden.
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17
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Xu F, Ma Z, Wang X, Wang Q, Han Y, Li Y, Sun G. From liquid hot water pretreatment solution to lignin-based hydrophobic deep eutectic solvent for highly efficient extraction of Cr (VI). Int J Biol Macromol 2022; 208:883-889. [PMID: 35367274 DOI: 10.1016/j.ijbiomac.2022.03.190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/27/2022] [Accepted: 03/28/2022] [Indexed: 11/05/2022]
Abstract
Liquid hot water (LHW) pretreatment has been widely investigated attributed to its advantages, such as environmental friendliness, the potential application of dissolved hemicellulose, and no chemical addition. Expanding the portfolio of products that can be made from LHW pretreatment solutions will be critical to enabling a viable LHW-based economy. We provide a one-step method to separate and functionalize lignin from the LHW pretreatment solution. A hydrophobic deep eutectic solvent (hDES) was prepared by using methyltrioctylammonium chloride (MTAC) and the LHW pretreatment solution and directly applied to the extraction of Cr (VI) in an aqueous solution. In the process of forming hDES, the removal rate of liquid hot water lignin (LHWL) was reached 99%. The new LHW-hDES exhibited excellent extraction performance for Cr (VI), the extraction capacity was as high as 198.402 mg g-1, optimum extraction conditions at the mass of hDES 0.10 g, vortex time 90 s, room temperature, and natural pH. Notably, we have shown that the method of combining the separation and functionalization of lignin in the LHW pretreatment solution, which can provide a way of thinking for the application of the LHW pretreatment solution.
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Affiliation(s)
- Fuqiong Xu
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zihao Ma
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xing Wang
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; Laboratory of Pulp and Papermaking Engineering, Yueyang Forest & Paper Co., Ltd., Hunan 414002, China.
| | - Qingyu Wang
- Institute for Catalysis (ICAT) and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21W10, Kita-Ku, Sapporo 001-0021, Japan
| | - Ying Han
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Yao Li
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Guangwei Sun
- Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
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18
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Yang T, Li Z, Wei W, Wang X, Liu F, Xu X, Liu Z. Antioxidant properties of lignin extracted from cotton stalks by ethanol solution-assisted liquid hot water before and after adding supercritical CO2. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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19
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Marques FP, Colares AS, Cavalcante MN, Almeida JS, Lomonaco D, Silva LMA, de Freitas Rosa M, Leitão RC. Optimization by Response Surface Methodology of Ethanosolv Lignin Recovery from Coconut Fiber, Oil Palm Mesocarp Fiber, and Sugarcane Bagasse. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco P. Marques
- Departament of Organic and Inorganic Chemistry, Federal University of Ceará, 60440-900, Fortaleza-CE, Brazil
| | - Aldo S. Colares
- Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, 60511-110, Fortaleza-CE, Brazil
| | - Maria N. Cavalcante
- Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, 60511-110, Fortaleza-CE, Brazil
| | - Jessica S. Almeida
- Chemical Engineering Department, Federal University of Ceará, 60455-760, Fortaleza-CE, Brazil
| | - Diego Lomonaco
- Departament of Organic and Inorganic Chemistry, Federal University of Ceará, 60440-900, Fortaleza-CE, Brazil
| | - Lorena M. A. Silva
- Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, 60511-110, Fortaleza-CE, Brazil
| | | | - Renato C. Leitão
- Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, 60511-110, Fortaleza-CE, Brazil
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20
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You S, Xie Y, Zhuang X, Chen H, Qin Y, Cao J, Lan T. Effect of high antioxidant activity on bacteriostasis of lignin from sugarcane bagasse. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Integral Analysis of Liquid-Hot-Water Pretreatment of Wheat Straw: Evaluation of the Production of Sugars, Degradation Products, and Lignin. SUSTAINABILITY 2021. [DOI: 10.3390/su14010362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Developing sustainable biorefineries is an urgent matter to support the transition to a sustainable society. Lignocellulosic biomass (LCB) is a crucial renewable feedstock for this purpose, and its complete valorization is essential for the sustainability of biorefineries. However, it is improbable that a single pretreatment will extract both sugars and lignin from LCB. Therefore, a combination of pretreatments must be applied. Liquid-hot-water (LHW) is highlighted as a pretreatment for hemicellulose hydrolysis, conventionally analyzed only in terms of sugars and degradation products. However, lignin is also hydrolyzed in the process. The objective of this work was to evaluate LHW at different conditions for sugars, degradation products, and lignin. We performed LHW at 160, 180, and 200 °C for 30, 60, and 90 min using wheat straw and characterized the extract for sugars, degradation products (furfural, hydroxymethylfurfural, and acetic acid), and lignin. Three conditions allowed reaching similar total sugar concentrations (~12 g/L): 160 °C for 90 min, 180 °C for 30 min, and 180 °C for 60 min. Among these, LHW performed at 160 °C for 90 min allowed the lowest concentration of degradation products (0.2, 0.01, and 1.4 g/L for furfural, hydroxymethylfurfural, and acetic acid, respectively) and lignin hydrolysis (2.2 g/L). These values indicate the potential use of the obtained sugars as a fermentation substrate while leaving the lignin in the solid phase for a following stage focused on its extraction and valorization.
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22
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Sustainability in Heritage Wood Conservation: Challenges and Directions for Future Research. FORESTS 2021. [DOI: 10.3390/f13010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Conserving the world’s cultural and natural heritage is considered a key contributor to achieving the targets set out in the United Nation’s Sustainable Development Goals, yet how much attention do we pay to the methods we use to conserve and protect this heritage? With a specific focus on wooden objects of cultural heritage, this review discusses the current state-of-the-art in heritage conservation in terms of sustainability, sustainable alternatives to currently used consolidants, and new research directions that could lead to more sustainable consolidants in the future. Within each stage a thorough discussion of the synthesis mechanisms and/or extraction protocols, particularly for bio-based resources is provided, evaluating resource usage and environmental impact. This is intended to give the reader a better understanding of the overall sustainability of each different approach and better evaluate consolidant choices for a more sustainable approach. The challenges facing the development of sustainable consolidants and recent research that is likely to lead to highly sustainable new consolidant strategies in the future are also discussed. This review aims to contribute to the ongoing discussion of sustainable conservation and highlight the role that consolidants play in truly sustainable heritage conservation.
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23
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Nivedha M, Manisha M, Gopinath M, Baskar G, Tamilarasan K. Fractionation, characterization, and economic evaluation of alkali lignin from saw industry waste. BIORESOURCE TECHNOLOGY 2021; 335:125260. [PMID: 34015566 DOI: 10.1016/j.biortech.2021.125260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 06/12/2023]
Abstract
The present work was focused on the investigation of lignin isolation from saw industry biomass (sawdust (SD)) using alkali solution, and to perform economic analysis for 2000 kg/batch hypothetical plant using techno-economic analysis. The isolated lignin was fractionated using organic solvent to obtain purified lignin. FTIR and 1H NMR analysis were performed to examine the structural characteristics of lignin. Lignin nanoparticles (LN) showed higher total phenolic content (TPC) (244.1 ± 2 µg of GAE per mg) and antioxidant activity (63.2 ± 1.7%) compared with crude lignin (CL), ethanol fractionated lignin (EL), and acetone fractionated lignin (AL). SuperPro designer was exposed to design and simulated 2000 kg/batch of sawdust fractionation process. The techno-economic analysis estimated that the lignin production cost is about $ 487,000 per year, and the annual revenue could be $ 1,850,000 per year. The techno-economic analysis and sensitivity analysis could be useful for the industrial level sawdust fractionation process.
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Affiliation(s)
- Murugesan Nivedha
- Department of Biotechnology, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai-600 062, Tamil Nadu, India
| | - Madhusudhanan Manisha
- Department of Biotechnology, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai-600 062, Tamil Nadu, India
| | - Margavelu Gopinath
- Department of Biotechnology, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai-600 062, Tamil Nadu, India
| | - Gurunathan Baskar
- Department of Biotechnology, St.Joseph's College of Engineering, Chennai-600119, Tamil Nadu, India
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24
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Biodegradable and renewable UV-shielding polylactide composites containing hierarchical structured POSS functionalized lignin. Int J Biol Macromol 2021; 188:323-332. [PMID: 34375661 DOI: 10.1016/j.ijbiomac.2021.08.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/04/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023]
Abstract
The demand for biodegradable and renewable UV-shielding materials is ever increasing due to the rising concern for the environment. In this paper, biobased lignin was functionalized by polyhedral oligomeric silsesquioxane (POSS) with an epoxy substituent. Then the POSS decorated lignin (lignin-POSS) was mixed with polylactide (PLA) to act as UV-shielding filler by melt compounding. The SEM observation revealed that the presence of POSS contributed to improving the homogeneous dispersion of lignin-POSS in the PLA matrix with good compatibility when the content of lignin-POSS was lower than 5 wt%. The synergistic effects of lignin and POSS endowed PLA composite films with a good balance of UV-shielding ability and transparency in the visible light region. With the addition of 5 wt% lignin-POSS, the PLA composite film absorbed almost all UV irradiation across the entire UV spectrum. In addition, the presence of lignin-POSS could serve as a nucleating agent to increase the degree of crystallinity of PLA. The dynamical rheological tests revealed that the lignin-POSSS reduced the complex viscosity and storage modulus of PLA composites, improving the flowability of PLA composites. This work presents a viable pathway to prepare biodegradable and renewable UV-shielding materials for potential packaging applications.
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25
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Chu Q, Tong W, Chen J, Wu S, Jin Y, Hu J, Song K. Organosolv pretreatment assisted by carbocation scavenger to mitigate surface barrier effect of lignin for improving biomass saccharification and utilization. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:136. [PMID: 34118969 PMCID: PMC8199801 DOI: 10.1186/s13068-021-01988-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/05/2021] [Indexed: 05/03/2023]
Abstract
BACKGROUND Ethanol organosolv (EOS) pretreatment is one of the most efficient methods for boosting biomass saccharification as it can achieve an efficient fractionation of three major constituents in lignocellulose. However, lignin repolymerization often occurs in acid EOS pretreatment, which impairs subsequent enzymatic hydrolysis. This study investigated acid EOS pretreatment assisted by carbocation scavenger (2-naphthol, 2-naphthol-7-sulfonate, mannitol and syringic acid) to improve biomass fractionation, coproduction of fermentable sugars and lignin adsorbents. In addition, surface barrier effect of lignin on cellulose hydrolysis was isolated from unproductive binding effect of lignin, and the analyses of surface chemistry, surface morphology and surface area were carried out to reveal the lignin inhibition mitigating effect of various additives. RESULTS Four different additives all helped mitigate lignin inhibition on cellulose hydrolysis in particular diminishing surface barrier effect, among which 2-naphthol-7-sulfonate showed the best performance in improving pretreatment efficacy, while mannitol and syringic acid could serve as novel green additives. Through the addition of 2-naphthol-7-sulfonate, selective lignin removal was increased up to 76%, while cellulose hydrolysis yield was improved by 85%. As a result, 35.78 kg cellulose and 16.63 kg hemicellulose from 100 kg poplar could be released and recovered as fermentable sugars, corresponding to a sugar yield of 78%. Moreover, 22.56 kg ethanol organosolv lignin and 17.53 kg enzymatic hydrolysis residue could be recovered as lignin adsorbents for textile dye removal, with the adsorption capacities of 45.87 and 103.09 mg g-1, respectively. CONCLUSIONS Results in this work indicated proper additives could give rise to the form of less repolymerized surface lignin, which would decrease the unproductive binding of cellulase enzymes to surface lignin. Besides, the supplementation of additives (NS, MT and SA) resulted in a simultaneously increased surface area and decreased lignin coverage. All these factors contributed to the diminished surface barrier effect of lignin, thereby improving the ease of enzymatic hydrolysis of cellulose. The biorefinery process based on acidic EOS pretreatment assisted by carbocation scavenger was proved to enable the coproduction of fermentable sugars and lignin adsorbents, allowing the holistic utilization of lignocellulosic biomass for a sustainable biorefinery.
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Affiliation(s)
- Qiulu Chu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China
- International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, China
| | - Wenyao Tong
- College of Biology and the Environment, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China
| | - Jianqiang Chen
- College of Biology and the Environment, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China
| | - Shufang Wu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China
- International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, China
| | - Yongcan Jin
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China
- International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB, T2N 1Z4, Canada
| | - Kai Song
- College of Biology and the Environment, Nanjing Forestry University, No.159 Longpan Road, Nanjing, 210037, China.
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Haqiqi M, Bankeeree W, Lotrakul P, Pattananuwat P, Punnapayak H, Ramadhan R, Kobayashi T, Amirta R, Prasongsuk S. Antioxidant and UV-Blocking Properties of a Carboxymethyl Cellulose-Lignin Composite Film Produced from Oil Palm Empty Fruit Bunch. ACS OMEGA 2021; 6:9653-9666. [PMID: 33869945 PMCID: PMC8047929 DOI: 10.1021/acsomega.1c00249] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 03/15/2021] [Indexed: 06/01/2023]
Abstract
Oil palm empty fruit bunch (EFB) pulp with the highest cellulose content of 83.42% was obtained from an optimized process of acid pretreatment (0.5% v/v H2SO4), alkaline extraction (15% w/w NaOH), and hydrogen peroxide bleaching (10% w/v H2O2), respectively. The EFB cellulose was carboxymethylated, and the obtained carboxymethyl cellulose (CMC) was readily water-soluble (81.32%). The EFB CMC was blended with glycerol and cast into a composite film. Lignin that precipitated from the EFB black liquor was also incorporated into the film at different concentrations, and its effect on the UV-blocking properties of the film was determined. Interestingly, the EFB CMC film without lignin addition completely blocked UV-B transmittance. The incorporation of lignin at all concentrations significantly enhanced the UV-A blocking and other physical properties of the film, including the surface roughness, thickness, and thermal stability, although the tensile strength and water vapor permeability were not significantly affected. Complete UV-A and UV-B blocking were observed when lignin was added at 0.2% (w/v), and the film also exhibited the highest antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals with an half-maximal inhibitory concentration (IC50) value of 3.87 mg mL-1.
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Affiliation(s)
- Muhammad
T. Haqiqi
- Program
in Biotechnology, Faculty of Science, Chulalongkorn
University, Bangkok 10330, Thailand
- Plant
Biomass Utilization Research Unit, Department of Botany, Faculty of
Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Wichanee Bankeeree
- Plant
Biomass Utilization Research Unit, Department of Botany, Faculty of
Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Pongtharin Lotrakul
- Plant
Biomass Utilization Research Unit, Department of Botany, Faculty of
Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Prasit Pattananuwat
- Department
of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Hunsa Punnapayak
- Plant
Biomass Utilization Research Unit, Department of Botany, Faculty of
Science, Chulalongkorn University, Bangkok 10330, Thailand
- Department
of Biology, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia
| | - Rico Ramadhan
- Department
of Chemistry, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia
- Division
of Exploration and Synthesis of Bioactive Compound, Research Center
for Bio-Molecule Engineering, Airlangga
University, Surabaya 60115, Indonesia
| | - Takaomi Kobayashi
- Department
of Materials Science and Technology, Nagaoka
University of Technology, Nagaoka 940-2188, Japan
| | - Rudianto Amirta
- Faculty
of Forestry, Mulawarman University, Samarinda 75124, Indonesia
| | - Sehanat Prasongsuk
- Plant
Biomass Utilization Research Unit, Department of Botany, Faculty of
Science, Chulalongkorn University, Bangkok 10330, Thailand
- Department
of Biology, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia
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Gómez-Cruz I, del Mar Contreras M, Romero I, Castro E. A biorefinery approach to obtain antioxidants, lignin and sugars from exhausted olive pomace. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Tailored organosolv banana peels lignins: Improved thermal, antioxidant and antimicrobial performances by controlling process parameters. Int J Biol Macromol 2021; 181:241-252. [PMID: 33781810 DOI: 10.1016/j.ijbiomac.2021.03.156] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 11/20/2022]
Abstract
There is a growing environmental concern in the world for replacing the traditional petroleum-based products. The aim of this work was to evaluate the structure - property relationship of banana peel lignins (BPLs) as antioxidant and antimicrobial agents by controlling the parameters of organosolv process. The milled banana peel was hydrolyzed using an aqueous acetic acid solution (70, 80 and 90% v/v) and 2.0% v/v HCl at 110 °C for 1, 2 and 3 h. BPLs were characterized by FTIR, 1H NMR, 1H13C HSQC, 31P NMR, GPC and TGA. The antioxidant capacity of BPLs was evaluated by DPPH, ABTS and H2O2 assays, comparing their performance with that of ascorbic and gallic acid. The antimicrobial activity of BPLs was evaluated against E. coli. The reaction time and acetic acid/water ratio had significant effects on the yield and purity of BPLs. The composition of organosolv solution also affected their total amount of hydroxyls (0.71-0.82 mmol g-1), Mw (2759-3954 g mol-1), Tonset (232-254 °C), antioxidant and antimicrobial activities. It can be concluded that the control of organosolv parameters can be a useful tool for tuning the structural features of lignins and to maximize their performance.
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Arruda MDM, da Paz Leôncio Alves S, da Cruz Filho IJ, de Sousa GF, de Souza Silva GA, do Nascimento Santos DKD, do Carmo Alves de Lima M, de Moraes Rocha GJ, de Souza IA, de Melo CML. Characterization of a lignin from Crataeva tapia leaves and potential applications in medicinal and cosmetic formulations. Int J Biol Macromol 2021; 180:286-298. [PMID: 33737189 DOI: 10.1016/j.ijbiomac.2021.03.077] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/08/2021] [Accepted: 03/13/2021] [Indexed: 12/18/2022]
Abstract
Lignins are phenolic macromolecules that have several applications. In this work, we examine some biological activities of a lignin-like macromolecule isolated from the Crataeva tapia leaves, not yet studied to evaluate its potential applications in medicinal and cosmetic formulations. Lignin was obtained by alkaline delignification and its physical-chemical characterization was made by means of FT-IR, UV-Vis, NMR spectroscopy, elementary analysis, molecular mass determination and thermal analysis. Lignin is of the GSH type, with levels of hydrogen (5.10%), oxygen (27.18%), carbon (67.60%), nitrogen (0.12%) and phenolic content of 189.6 ± 9.6 mg GAE/g. In addition, it is a thermally stable macromolecule with low antioxidant activity. Cytotoxicity and cytokine production were assessed by flow cytometry. The photoprotective activity was evaluated by adding different concentrations of lignin to a commercial cream. Lignin was not cytotoxic, it stimulated the production of TNF-α, IL-6 and IL-10 and did not promote a significant change in nitric oxide levels. In addition, this macromolecule was able to promote increased absorption of ultraviolet light from a commercial cream. These results reinforce the ethnopharmacological use of C. tapia leaves and suggest the need for further studies to determine the potential medicinal and cosmetic applications (sunscreen) of lignin from C. tapia leaves.
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Affiliation(s)
- Marcela Daniela Muniz Arruda
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - Simone da Paz Leôncio Alves
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - Iranildo José da Cruz Filho
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - Georon Ferreira de Sousa
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - Guilherme Antonio de Souza Silva
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | | | - Maria do Carmo Alves de Lima
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - George Jackson de Moraes Rocha
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Polo II de Alta Tecnologia, Rua Giuseppe Máximo Scolfaro, 10.000, PO Box 6192, 13083-100 Campinas, SP, Brazil.
| | - Ivone Antonia de Souza
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
| | - Cristiane Moutinho Lagos de Melo
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco (UFPE), Avenida Prof. Artur de Sá, s/n, 50740-520 Recife, PE, Brazil
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30
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Extraction of lignin from Chinese quince fruit by acetic acid solution at above atmospheric pressure: Yield distribution, structural characterization, and antioxidant activities. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01561-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Thermal stability, hydrophobicity and antioxidant potential of ultrafine poly (lactic acid)/rice husk lignin fibers. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2021. [DOI: 10.1007/s43153-020-00083-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Pereira PHF, Ornaghi HL, Arantes V, Cioffi MOH. Effect of chemical treatment of pineapple crown fiber in the production, chemical composition, crystalline structure, thermal stability and thermal degradation kinetic properties of cellulosic materials. Carbohydr Res 2021; 499:108227. [PMID: 33388571 DOI: 10.1016/j.carres.2020.108227] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022]
Abstract
Recently, the growing environmental concerns and economic demands have driven the need to develop effective solutions for the treatment of vegetal fibers to be used as renewable source for various industrial applications. The present study aimed to explore pineapple crown fibers (PCs) as an alternative source of cellulose. The three treatments (alcohol-insoluble residue (AIR), alkaline (AT), and organosolv) evaluated promoted chemical and morphological changes to the PCs. Fresh and treated PCs were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), thermogravimetric analysis (TG), and chemical composition. The XRD results showed that the Cellulose-I allomorph was not altered during extraction, and that the crystallinity index of the fibers treated with AT, first bleaching step, second bleaching step, and the second bleaching step followed by KOH treatment (2B_KOH) increased to 77.8; 83.2; 83.5 and 86% when compared with fresh PC (62.3%). Results from the thermal analysis revealed that thermal stability increased for the isolated cellulose, and the maximum degradation for (2B_KOH) is 350 °C. Chemical composition results showed a decrease in the content of hemicellulose, lignin and other soluble materials after alkaline treatment, suggesting high-quality 2B_KOH with 74.6% of cellulose. SEM revealed changes in the morphological structure on fibers. Alkaline treatment followed by H2O2 bleaching is an excellent alternative for the removal of non-cellulosic material and facilitates the isolation of cellulose. These results suggested that there is a potential to isolate cellulose from PC via the sequence of treatment of a methodology by chlorite-free.
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Affiliation(s)
- Paulo Henrique Fernandes Pereira
- Fatigue and Aeronautical Material Research Group, Department of Materials and Technology, São Paulo State University (Unesp), School of Engineering, Guaratinguetá, 12516-410, São Paulo, Brazil.
| | - Heitor Luiz Ornaghi
- Fatigue and Aeronautical Material Research Group, Department of Materials and Technology, São Paulo State University (Unesp), School of Engineering, Guaratinguetá, 12516-410, São Paulo, Brazil
| | - Valdeir Arantes
- Biocatalysis and Bioproducts Laboratory, Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, 12602-810, Brazil
| | - Maria Odila Hilário Cioffi
- Fatigue and Aeronautical Material Research Group, Department of Materials and Technology, São Paulo State University (Unesp), School of Engineering, Guaratinguetá, 12516-410, São Paulo, Brazil
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33
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Xiao L, Liu W, Huang J, Lou H, Qiu X. Study on the Antioxidant Activity of Lignin and Its Application Performance in SBS Elastomer. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04699] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liangfeng Xiao
- School of Chemistry and Chemical Engineering, Guangdong Engineering Research Center for Green Fine Chemicals, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Weifeng Liu
- School of Chemistry and Chemical Engineering, Guangdong Engineering Research Center for Green Fine Chemicals, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Jinhao Huang
- School of Chemistry and Chemical Engineering, Guangdong Engineering Research Center for Green Fine Chemicals, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Hongming Lou
- School of Chemistry and Chemical Engineering, Guangdong Engineering Research Center for Green Fine Chemicals, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Xueqing Qiu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Waihuan Xi Road 100, Guangzhou Higher Education
Mega Center, Guangzhou 510006, P.R China
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34
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de Oliveira DR, Avelino F, Mazzetto SE, Lomonaco D. Microwave-assisted selective acetylation of Kraft lignin: Acetic acid as a sustainable reactant for lignin valorization. Int J Biol Macromol 2020; 164:1536-1544. [PMID: 32738321 DOI: 10.1016/j.ijbiomac.2020.07.216] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/13/2020] [Accepted: 07/26/2020] [Indexed: 11/30/2022]
Abstract
Lignin acetylation, one of the most widespread chemical modifications used for improve the solubility of this biopolymer in organic solvents and increase polymer-lignin compatibility, has been performed for decades using time-consuming methodologies and acetylating agents with serious drawbacks. Moreover, traditional acetylation reactions generally conduce to non-selective acetylation of both aliphatic and phenolic groups. In this work, we demonstrated that partial and selective acetylation of kraft lignin can be carried out through a greener, simple and fast microwave-assisted process using acetic acid as solvent and acetylating agent. Structural characterization via FTIR, 1H-13C HSQC and 31P NMR demonstrated that acetylation reaction occurs selectively only in aliphatic hydroxyls, preserving the phenolic hydroxyls. Optimal reaction conditions were obtained using 1% (v/v) of H2SO4 as catalyst and only 5 min as reaction time. The acetylated Kraft lignin (AKL) obtained, have enhanced solubility in organic solvents (ethyl acetate, chloroform and dichloromethane) compared to unmodified Kraft lignin (KL) and antioxidant capacity almost 8 times higher than a commercial antioxidant BHT. These characteristics make the partially and selectively acetylated Kraft lignin a potential green antioxidant additive to be used in polymers blends.
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Affiliation(s)
- Davi Rabelo de Oliveira
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, 60440-900 Fortaleza, CE, Brazil
| | - Francisco Avelino
- Federal Institute of Education, Science and Technology of Ceará, 63503-790 Iguatu, CE, Brazil
| | - Selma Elaine Mazzetto
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, 60440-900 Fortaleza, CE, Brazil
| | - Diego Lomonaco
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, 60440-900 Fortaleza, CE, Brazil.
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35
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Lourençon TV, de Lima GG, Ribeiro CSP, Hansel FA, Maciel GM, da Silva K, Winnischofer SMB, de Muniz GIB, Magalhães WLE. Antioxidant, antibacterial and antitumoural activities of kraft lignin from hardwood fractionated by acid precipitation. Int J Biol Macromol 2020; 166:1535-1542. [PMID: 33186650 DOI: 10.1016/j.ijbiomac.2020.11.033] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023]
Abstract
Kraft lignin, so far useful for energy generation, has been gathering considerable attention as an alternative material to replace fossil-based resources mainly due to its high phenolic content. However, the wide molecular weight distribution and chemical composition heterogeneity led to the development of fractionation methods. Herein, to narrow such characteristics we used eucalypt kraft lignin fractionated at pH's 9, 7, 5 and 3 by sequential acid precipitation. These lignin fractions were first characterised by simultaneous pyrolysis and trimethylsilylation (SPyT) with N-Methyl-N-(trimethylsilyl) trifluoroacetamide with posterior tests of antioxidant, antibacterial, and antitumour activities. We observed higher ratio of syringyl/guaiacyl groups and increase in antioxidant activity in those fractions with lower molecular weight (precipitated at lower pH's). Fractions precipitated at pH's 9 and 7 have shown an outstanding antibacterial activity against five bacteria. Moreover, fractions 7 and 5 presented at cytotoxicity tests higher ability to inhibit the growth of U87MG and T98G glioma cells, while only a slight inhibition of adult human fibroblasts (non-tumour cells) was detected.
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Affiliation(s)
- Tainise V Lourençon
- Wood and Forestry Science Center (PPGEF), Federal University of Paraná, Lothário Meissner 900, 80210-170 Curitiba, Brazil; Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland.
| | - Gabriel G de Lima
- Integrated Program in Engineering & Materials Science, Federal University of Paraná, Polytechnic Center, 81531-990 Curitiba, Brazil; Materials Research Institute, Athlone Institute of Technology, Athlone, Ireland
| | - Carolina S P Ribeiro
- Biochemistry and Molecular Biology Department, Section of Biological Sciences, Federal University of Paraná, 81530-980 Curitiba, Brazil
| | - Fabricio A Hansel
- Embrapa Florestas, Estrada da Ribeira, Km 111, 83411-000 Colombo, Brazil
| | - Giselle M Maciel
- Biotechnology Laboratory, Chemistry and Biology Department, Federal University of Technology, 81280-340 Curitiba, Brazil
| | - Krisle da Silva
- Embrapa Florestas, Estrada da Ribeira, Km 111, 83411-000 Colombo, Brazil
| | - Sheila M B Winnischofer
- Biochemistry and Molecular Biology Department, Section of Biological Sciences, Federal University of Paraná, 81530-980 Curitiba, Brazil
| | - Graciela I B de Muniz
- Wood and Forestry Science Center (PPGEF), Federal University of Paraná, Lothário Meissner 900, 80210-170 Curitiba, Brazil
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36
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Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.110107] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Lignin isolated from Caesalpinia pulcherrima leaves has antioxidant, antifungal and immunostimulatory activities. Int J Biol Macromol 2020; 162:1725-1733. [DOI: 10.1016/j.ijbiomac.2020.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/28/2020] [Accepted: 08/01/2020] [Indexed: 02/06/2023]
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38
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Freitas FMC, Cerqueira MA, Gonçalves C, Azinheiro S, Garrido-Maestu A, Vicente AA, Pastrana LM, Teixeira JA, Michelin M. Green synthesis of lignin nano- and micro-particles: Physicochemical characterization, bioactive properties and cytotoxicity assessment. Int J Biol Macromol 2020; 163:1798-1809. [PMID: 32961194 DOI: 10.1016/j.ijbiomac.2020.09.110] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/13/2020] [Accepted: 09/15/2020] [Indexed: 12/29/2022]
Abstract
Lignin particles (LPs) have gained prominence due to their biodegradability and bioactive properties. LP production at nano and micro scale produced from organosolv lignin and the understanding of size's effect on their properties is unexplored. This work aimed to produce and characterize lignin nanoparticles and microparticles using a green synthesis process, based on ethanol-solubilized lignin and water. Spherical shape LPs, with a mean size of 75 nm and 215 nm and with a low polydispersity were produced, as confirmed by transmission electron microscopy and dynamic light scattering. LPs thermal stability improved over raw lignin, and the chemical structure of lignin was not affected by the production method. The antimicrobial tests proved that LPs presented a bacteriostatic effect on Escherichiacoli and Salmonella enterica. Regarding the antioxidant potential, LPs had a good antioxidant activity that increased with the reaction time and LPs concentration. LPs also presented an antioxidant effect against intracellular ROS, reducing the intracellular ROS levels significantly. Furthermore, the LPs showed a low cytotoxic effect in Caco-2 cell line. These results showed that LPs at different scales (nano and micro) present biological properties and are safe to be used in different high value industrial sectors, such as biomedical, pharmaceutical and food.
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Affiliation(s)
- Filipa M C Freitas
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Miguel A Cerqueira
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Catarina Gonçalves
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Sarah Azinheiro
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Alejandro Garrido-Maestu
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - António A Vicente
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Lorenzo M Pastrana
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - José A Teixeira
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Michele Michelin
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Cheng XC, Guo XR, Qin Z, Wang XD, Liu HM, Liu YL. Structural features and antioxidant activities of Chinese quince (Chaenomeles sinensis) fruits lignin during auto-catalyzed ethanol organosolv pretreatment. Int J Biol Macromol 2020; 164:4348-4358. [PMID: 32931830 DOI: 10.1016/j.ijbiomac.2020.08.249] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 08/24/2020] [Accepted: 08/31/2020] [Indexed: 02/02/2023]
Abstract
Chinese quince fruits (Chaenomeles sinensis) have an abundance of lignins with antioxidant activities. To facilitate the utilization of Chinese quince fruits, lignin was isolated from it by auto-catalyzed ethanol organosolv pretreatment. The effects of three processing conditions (temperature, time, and ethanol concentration) on yield, structural features and antioxidant activities of the auto-catalyzed ethanol organosolv lignin samples were assessed individually. Results showed the pretreatment temperature was the most significant factor; it affected the molecular weight, S/G ratio, number of β-O-4' linkages, thermal stability, and antioxidant activities of lignin samples. According to the GPC analyses, the molecular weight of lignin samples had a negative correlation with pretreatment temperature. 2D-HSQC NMR and Py-GC/MS results revealed that the S/G ratios of lignin samples increased with temperature, while total phenolic hydroxyl content of lignin samples decreased. The structural characterization clearly indicated that the various pretreatment conditions affected the structures of organosolv lignin, which further resulted in differences in the antioxidant activities of the lignin samples. These results can be helpful for controlling and optimizing delignification during auto-catalyzed ethanol organosolv pretreatment, and they provide theoretical support for the potential applications of Chinese quince fruits lignin as a natural antioxidant in the food industry.
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Affiliation(s)
- Xi-Chuang Cheng
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
| | - Xin-Ran Guo
- School of International Education, Henan University of Technology, Zhengzhou 450001, China
| | - Zhao Qin
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China.
| | - Xue-De Wang
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
| | - Hua-Min Liu
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China.
| | - Yu-Lan Liu
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
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do Nascimento Santos DKD, Barros BRDS, Aguiar LMDS, da Cruz Filho IJ, de Lorena VMB, de Melo CML, Napoleão TH. Immunostimulatory and antioxidant activities of a lignin isolated from Conocarpus erectus leaves. Int J Biol Macromol 2020; 150:169-177. [DOI: 10.1016/j.ijbiomac.2020.02.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/27/2020] [Accepted: 02/06/2020] [Indexed: 12/11/2022]
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Dagnino EP, Chiappero LR, Nicolau VV, Chamorro ER. Separation process optimisation and characterisation of lignin from black carob tree sawdust into a biorefinery. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2019.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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42
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Fractionation and characterization of lignin from waste rice straw: Biomass surface chemical composition analysis. Int J Biol Macromol 2020; 145:795-803. [DOI: 10.1016/j.ijbiomac.2019.10.068] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/29/2019] [Accepted: 10/07/2019] [Indexed: 11/20/2022]
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da Silva CMS, Vital BR, Rodrigues FDÁ, de Almeida ÊW, Carneiro ADCO, Cândido WL. Hydrothermal and organic-chemical treatments of eucalyptus biomass for industrial purposes. BIORESOURCE TECHNOLOGY 2019; 289:121731. [PMID: 31323712 DOI: 10.1016/j.biortech.2019.121731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 05/05/2023]
Abstract
This study aimed to evaluate the promising feasibility of the hydrothermal pre-processing of eucalyptus wood and eucalyptus bark under organosolv and organic acid conditions to produce a highly concentrated cellulose feedstock. For that, particulate samples of both biomasses were heated in water solutions containing from 0 to 50%vol/vol of ethanol and from 0 to 50 mmol.L-1 of oxalic acid at temperatures between 140 and 180 °C. Significant differences on the thermal degradation profiles were observed for both biomasses indicating the partial hydrolysis converted them into a more homogeneous solid fraction with higher contents of cellulose. It was also observed a significant variation of the glycan content from approximately 39 to 76% for wood particles, whereas the variation for bark was from 32 to 50%. In general, the proposed pre-processing route was considered potentially feasible to concentrate the cellulose/glycan contents of eucalyptus biomasses for subsequent industrial utilization.
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Structure-antioxidant activity relationship of active oxygen catalytic lignin and lignin-carbohydrate complex. Int J Biol Macromol 2019; 139:21-29. [DOI: 10.1016/j.ijbiomac.2019.07.134] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/22/2019] [Accepted: 07/22/2019] [Indexed: 12/11/2022]
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Tailor-made organosolv lignins from coconut wastes: Effects of green solvents in microwave-assisted processes upon their structure and antioxidant activities. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100219] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Collins MN, Nechifor M, Tanasă F, Zănoagă M, McLoughlin A, Stróżyk MA, Culebras M, Teacă CA. Valorization of lignin in polymer and composite systems for advanced engineering applications – A review. Int J Biol Macromol 2019; 131:828-849. [DOI: 10.1016/j.ijbiomac.2019.03.069] [Citation(s) in RCA: 237] [Impact Index Per Article: 47.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 03/04/2019] [Accepted: 03/10/2019] [Indexed: 01/30/2023]
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Penín L, Santos V, Del Río JC, Parajó JC. Assesment on the chemical fractionation of Eucalyptus nitens wood: Characterization of the products derived from the structural components. BIORESOURCE TECHNOLOGY 2019; 281:269-276. [PMID: 30825830 DOI: 10.1016/j.biortech.2019.02.098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 06/09/2023]
Abstract
Following an integrated approach, Eucalyptus nitens wood samples were subjected to consecutive stages of aqueous fractionation and organosolv delignification, in order to separate hemicelluloses (mainly converted into soluble products from the aqueous stage) from lignin (largely converted into soluble fragments in the organosolv stage) and from cellulose (accumulated in the solid phase from pulping). The compositions of selected reaction media were studied by selected spectrophotometric, spectrometric, chromatographic, and nuclear magnetic resonance methods; and the solid phases from treatments were studied by diffractometry and scanning electron microscopy. The experimental information from the above tasks provides a deep insight on the yields, properties and potential applications of the target fractions in the scope of biorefineries.
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Affiliation(s)
- Lucía Penín
- Chemical Engineering Department, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, 32004 Ourense, Spain
| | - Valentín Santos
- Chemical Engineering Department, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, 32004 Ourense, Spain
| | - José Carlos Del Río
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), CSIC, PO Box 1052, E-41080 Seville, Spain
| | - Juan Carlos Parajó
- Chemical Engineering Department, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, 32004 Ourense, Spain.
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