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Peng Z, Jiang X, Si C, Joao Cárdenas-Oscanoa A, Huang C. Advances of Modified Lignin as Substitute to Develop Lignin-Based Phenol-Formaldehyde Resin Adhesives. CHEMSUSCHEM 2023; 16:e202300174. [PMID: 37338272 DOI: 10.1002/cssc.202300174] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/06/2023] [Indexed: 06/21/2023]
Abstract
Traditionally, phenols used to prepare phenol-formaldehyde (PF) resin adhesives are obtained from phenolic compounds and various chemicals, which are extracted from petroleum-based raw materials. Lignin, a sustainable phenolic macromolecule in the cell wall of biomass with an aromatic ring and a phenolic hydroxyl group similar to those of phenol, can be an ideal substitute for phenol in PF resin adhesives. However, only a few lignin-based adhesives are produced on a large scale in industry, mainly because of the low activity of lignin. Preparing lignin-based PF resin adhesives with exceptional achievements by modifying lignin instead of phenol is an efficient method to improve the economic benefits and protect the environment. In this review, the latest progress in the preparation of PF resin adhesives via lignin modification, including chemical, physical, and biological modifications, is discussed. In addition, the advantages and disadvantages of different lignin modification methods for adhesives are compared and discussed, and future research directions for the synthesis of lignin-based PF resin adhesives are proposed.
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Affiliation(s)
- Zhenwen Peng
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
| | - Xiao Jiang
- Department of Forestry Biomaterials, North Carolina State University Campus Box 8005, Raleigh, NC 27695-8005, USA
| | - Chuanling Si
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Aldo Joao Cárdenas-Oscanoa
- Forest Industry Department, Faculty of Forest Science, Universidad Nacional Agraria La Molina, Lima, 15024, Perú
| | - Caoxing Huang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
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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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Liu Z, Liu T, Jiang H, Zhang X, Li J, Shi SQ, Gao Q. Biomimetic lignin-protein adhesive with dynamic covalent/hydrogen hybrid networks enables high bonding performance and wood-based panel recycling. Int J Biol Macromol 2022; 214:230-240. [PMID: 35697168 DOI: 10.1016/j.ijbiomac.2022.06.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/24/2022] [Accepted: 06/07/2022] [Indexed: 01/21/2023]
Abstract
Exploring the reusability of wood-based panels is imperative in the wood industry for sustainable development and carbon balance. Non-reusable adhesives make wood-based panel recycling difficult. In this study, inspired by the adhesion and de-adhesion behavior of snail slime, we built dynamic covalent/hydrogen hybrid networks into adhesive system for achieving both high bonding performance and reusability. Specifically, the softwood lignin was purified and pretreated by ultrasonication to form a catechol structure (UAL) and then combined with soybean protein to develop a 100 % bio-based wood adhesive. The catechol structure of UAL formed dynamic covalent bonds (CN) with the amino groups of the protein to improve the water resistance and formed multiple hydrogen bonds as a sacrificial network to improve the toughness of the adhesive. Thus, the wet shear strength of plywood bonded by the resultant adhesive improved by 101.4 % to 1.37 MPa. The adhesive also exhibited flame retardancy (LOI = 37.7 %), mildew resistance (60 h), and antibacterial performance (inhibition zone = 8 mm). Notably, owing to the rearrangement of dynamic covalent/hydrogen hybrid networks and the thermoplastic property of UAL, the resultant adhesive was reusable (3 cycles) and degradable (2 months), which provides a potential method for the reuse of wood-based panels.
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Affiliation(s)
- Zheng Liu
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Tao Liu
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Huguo Jiang
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Xin Zhang
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Jianzhang Li
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Sheldon Q Shi
- Mechanical Engineering, University of North Texas, Denton, TX 76203, USA
| | - Qiang Gao
- MOE Key Laboratory of Wooden Material Science and Application & Beijing Key, Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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Zhang KN, Wang CZ, Lü QF, Chen MH. Enzymatic hydrolysis lignin functionalized Ti 3C 2T x nanosheets for effective removal of MB and Cu 2+ ions. Int J Biol Macromol 2022; 209:680-691. [PMID: 35413323 DOI: 10.1016/j.ijbiomac.2022.04.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/26/2022] [Accepted: 04/05/2022] [Indexed: 11/28/2022]
Abstract
Functionalized two-dimensional Ti3C2Tx (TN-EHL) was prepared as an effective adsorbent for removal of methylene blue dye (MB) and copper ions (Cu2+). Enzymatic hydrolysis lignin (EHL), a reproducible natural resource, was used to functionalize the Ti3C2Tx nanosheets. EHL can not only introduce active functional groups into TN-EHL but also prevent the oxidation of Ti3C2Tx, thus promoting the adsorption performance of TN-EHL. The maximum adsorption capacities of TN-EHL50 (in which the EHL content is 50 wt%) for MB and Cu2+ were 293.7 mg g-1 and 49.96 mg g-1, respectively. The higher correlation coefficients (R2) of MB (0.9996) and Cu2+ (0.9995) indicating that their adsorption processes can be described by the pseudo-second-order kinetic model. The MB adsorption data fit the Freundlich isotherm with R2 of 0.9953, whereas the Cu2+ ions adsorption data fit the Langmuir isotherm with R2 of 0.9998. The thermodynamic analysis indicates that the adsorption process of MB and Cu2+ on TN-EHL50 is spontaneous and endothermic. Significantly, the Cu2+ ions were reduced to Cu2O and CuO particles during the adsorption process. Therefore, TN-EHL has a great potential as an environmentally friendly adsorbent for MB removal and recovery of Cu2+ ions from wastewater.
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Affiliation(s)
- Kai-Ning Zhang
- College of Materials Science and Engineering, Fuzhou University, 2 Wulongjiang North Avenue, Fuzhou 350108, China
| | - Cheng-Zhen Wang
- College of Materials Science and Engineering, Fuzhou University, 2 Wulongjiang North Avenue, Fuzhou 350108, China
| | - Qiu-Feng Lü
- College of Materials Science and Engineering, Fuzhou University, 2 Wulongjiang North Avenue, Fuzhou 350108, China.
| | - Ming-Hui Chen
- College of Materials Science and Engineering, Fuzhou University, 2 Wulongjiang North Avenue, Fuzhou 350108, China
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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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Zhao Y, Yue J, Tao L, Liu Y, Shi SQ, Cai L, Xiao S. Effect of lignin on the self-bonding of a natural fiber material in a hydrothermal environment: Lignin structure and characterization. Int J Biol Macromol 2020; 158:1135-1140. [PMID: 32360469 DOI: 10.1016/j.ijbiomac.2020.04.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 12/23/2022]
Abstract
Self-bonding natural fiber materials (SNFMs) were prepared at different initial moisture contents (IMCs) through a molding pressing process. The self-bonding mechanism of the SNFMs was deduced from the chemical and structural changes of lignin and their mechanical strengths. The structural transformations of milled wood lignin (MWL) in the SNFMs were investigated by two-dimensional heteronuclear single quantum coherence, quantitative 31P-nuclear magnetic resonance spectra, gelpermeation chromatography, and thermogravimetric analysis. As IMC increased from 0% to 80%, the tensile strength increased from 23.0 to 70.0 MPa and the density increased from 0.99 to 1.05 g/cm3. IMC affected the distribution and abundance of the typical lignin linkages (β-O-4', β-β, and β-5') and the S-OH/G-OH ratios of lignin. Moreover, as IMC increased, the aliphatic hydroxyl groups proportionally decreased, while the condensed phenolic and non-condensed phenolic hydroxyl groups increased, the molecular weight of MWL became larger, and the thermal stability of lignin improved. These findings indicate the simultaneous occurrence of depolymerization and condensation reactions of lignin. The condensation reaction dominated, improving the mechanical strength of the material. Our results explain (at least partly) the self-bonding mechanism of SNFMs.
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Affiliation(s)
- Yinling Zhao
- College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China
| | - Jinquan Yue
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Longchen Tao
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Yusen Liu
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Sheldon Q Shi
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA
| | - Liping Cai
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA
| | - Shengling Xiao
- College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China.
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Wang S, Liu Y, Lü QF, Zhuang H. Facile preparation of biosurfactant-functionalized Ti2CTX MXene nanosheets with an enhanced adsorption performance for Pb(II) ions. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111810] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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da Cruz Filho IJ, da Silva Barros BR, de Souza Aguiar LM, Navarro CDC, Ruas JS, de Lorena VMB, de Moraes Rocha GJ, Vercesi AE, de Melo CML, Maior AMS. Lignins isolated from Prickly pear cladodes of the species Opuntia fícus-indica (Linnaeus) Miller and Opuntia cochenillifera (Linnaeus) Miller induces mice splenocytes activation, proliferation and cytokines production. Int J Biol Macromol 2018; 123:1331-1339. [PMID: 30244129 DOI: 10.1016/j.ijbiomac.2018.09.120] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/14/2018] [Accepted: 09/20/2018] [Indexed: 01/14/2023]
Abstract
Opuntia fícus-indica and Opuntia cochenillifera are species of Cactaceae, found in the arid regions of the planet. They present water, cellulose, hemicellulose, pectins, extractives, ashes and lignins. Here we aimed to study the immunomodulatory action of lignins from these two species against mice splenocytes, since no study for this purpose has yet been reported. The antioxidant activities of these lignins were evaluated by the DPPH, ABTS, NO assays and total antioxidant activity. Cytotoxicity was evaluated through Annexin V-FITC and propidium iodide-PE probs and cell proliferation was determined by CFSE. Immunomodulation studies with Opuntia lignins obtained were performed through investigation of ROS levels, cytosolic calcium release, changes on mitochondrial membrane potential, cytokine production and NO release. Results showed that Opuntia cochenillifera lignin presented more phenolic amount and antioxidant activities than Opuntia ficius-indica. Both lignins showed high cell viability (>96%) and cell proliferation. Activation signal was observed for both lignins with increase of ROS and cytosolic calcium levels, and changes in mitochondrial membrane potential. In addition, lignins induced high TNF-α, IL-6 and IL-10 production and reduced NO release. Therefore, these lignins present great potential to be used as molecules with a proinflammatory profile, being shown as a promising therapeutic agent.
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Affiliation(s)
- Iranildo José da Cruz Filho
- Laboratory of Biothecnological Process, Antibiotics Department, Federal University of Pernambuco, Pernambuco, Brazil
| | - Bárbara Rafaela da Silva Barros
- Laboratory of Immunological and Antitumor Analyzes, Antibiotics Department, Federal University of Pernambuco, Pernambuco, Brazil
| | - Lethícia Maria de Souza Aguiar
- Laboratory of Immunological and Antitumor Analyzes, Antibiotics Department, Federal University of Pernambuco, Pernambuco, Brazil
| | | | - Juliana Silveira Ruas
- Laboratory of Bioenergetic, Department of Clinical Patology, Campinas State University, São Paulo, Brazil
| | | | - George Jackson de Moraes Rocha
- National Laboratory of Bioethanol Science and Technology, National Center for Research in Energy and Materials, São Paulo, Brazil
| | - Aníbal Eugênio Vercesi
- Laboratory of Bioenergetic, Department of Clinical Patology, Campinas State University, São Paulo, Brazil
| | | | - Ana Maria Souto Maior
- Laboratory of Biothecnological Process, Antibiotics Department, Federal University of Pernambuco, Pernambuco, Brazil
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Structural elucidation of lignin-carbohydrate complexes (LCCs) from Chinese quince (Chaenomeles sinensis) fruit. Int J Biol Macromol 2018; 116:1240-1249. [DOI: 10.1016/j.ijbiomac.2018.05.117] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/09/2018] [Accepted: 05/16/2018] [Indexed: 11/21/2022]
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Niu N, Ma Z, He F, Li S, Li J, Liu S, Yang P. Preparation of Carbon Dots for Cellular Imaging by the Molecular Aggregation of Cellulolytic Enzyme Lignin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5786-5795. [PMID: 28514158 DOI: 10.1021/acs.langmuir.7b00617] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Carbon dots, which are less than 10 nm in diameter, have been widely investigated because of their unique luminescence properties and potential for use in bioimaging. In the present work, natural carbon dots (L-CDs) were obtained by molecular aggregation, using ethanol-extracted cellulolytic enzyme lignin. The whole process for the preparation of L-CDs was green and simple to operate and did not use toxic chemical reagents or harsh conditions. The newly prepared L-CDs emitted multicolor photoluminescence following one- and two-photon excitation. The L-CDs also showed good cellular biocompatibility, which is crucial for biological applications. One- and two-photon cell-imaging studies demonstrated the potential of L-CDs for bioimaging.
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Affiliation(s)
| | | | - Fei He
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University , Harbin 150001, P.R. China
| | | | | | | | - Piaoping Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University , Harbin 150001, P.R. China
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Novel pyrazoles and pyrazolo[1,2- a ]pyridazines as selective COX-2 inhibitors; Ultrasound-assisted synthesis, biological evaluation, and DFT calculations. Bioorg Med Chem Lett 2017; 27:2377-2383. [DOI: 10.1016/j.bmcl.2017.04.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 04/04/2017] [Accepted: 04/06/2017] [Indexed: 01/02/2023]
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12
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Zhou G, Fan T, Xu M, Qiu H, Wang J, Qiu L. The development and characterization of a novel coagulant for dust suppression in open-cast coal mines. ADSORPT SCI TECHNOL 2017. [DOI: 10.1177/0263617417711025] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This paper proposes the development of a novel coagulant for dust suppression in open-cast mines. Specifically, pretreated sodium lignin sulfonate and acrylic acid were first cross-linked, then the graft copolymerization of the intermediate product (the cross-linking product) and acrylamide was conducted and finally the resulting gelatinous substances were crushed. During the reaction process, N,N’-methylene-bis-acrylamide and ammonium persulfate were used as the cross-linking agent and initiator, respectively. Subsequently, the functional groups, crystalline structure, and thermal stability of the dust coagulant were examined by means of Fourier transform infrared spectra measurements, X-ray diffraction spectra measurements, and differential scanning calorimeter analysis. Moreover, single-factor experiments were conducted to explore the optimal synthesis condition. According to the experimental results, the coagulant achieved its optimal dust suppression performance under the following conditions: the mass ratio of lignin to acrylic acid was 1:3, the mass ratio of lignin to acrylamide was 2:7, the content of the cross-linking agent was 0.9%, the mass ratio of initiator to acrylamide was 2:100, the reaction temperature was set as 60℃, and the pH value was set as 7. Finally, the coagulant was measured for its swelling kinetics, viscosity, film-forming hardness, peeling strength, and ability to suppress dust. It can be concluded that the coagulant exhibits a very high standard of both dust suppression and wind resistance.
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Affiliation(s)
- Gang Zhou
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China; School of Safety Engineering, China University of Mining and Technology, China
| | - Tao Fan
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China
| | - Mao Xu
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China
| | - Han Qiu
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China
| | - Jiayuan Wang
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China
| | - Lei Qiu
- College of Mining and Safety Engineering, Shandong University of Science and Technology, China
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