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Nakayama K, Sakakibara K. Machine learning strategy to improve impact strength for PP/cellulose composites via selection of biomass fillers. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2024; 25:2351356. [PMID: 38817247 PMCID: PMC11138231 DOI: 10.1080/14686996.2024.2351356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 04/30/2024] [Indexed: 06/01/2024]
Abstract
Lignocellulosic materials have inherent complexities and natural nanoarchitectures, such as various chemical constituents in wood cell walls, structural factors such as fillers, surface properties, and variations in production. Recently, the development of lignocellulosic filler-reinforced polymer composites has attracted increasing attention due to their potential in various industries, which are recognized for environmental sustainability and impressive mechanical properties. The growing demand for these composites comes with increased complexity regarding their specifications. Conventional trial-and-error methods to achieve desired properties are time-intensive and costly, posing challenges to efficient production. Addressing these issues, our research employs a data-driven approach to streamline the development of lignocellulosic composites. In this study, we developed a machine learning (ML)-assisted prediction model for the impact energy of the lignocellulosic filler-reinforced polypropylene (PP) composites. Firstly, we focused on the influence of natural supramolecular structures in biomass fillers, where the Fourier transform infrared spectra and the specific surface area are used, on the mechanical properties of the PP composites. Subsequently, the effectiveness of the ML model was verified by selecting and preparing promising composites. This model demonstrated sufficient accuracy for predicting the impact energy of the PP composites. In essence, this approach streamlines selecting wood species, saving valuable time.
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Affiliation(s)
- Koyuru Nakayama
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Hiroshima, Japan
| | - Keita Sakakibara
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Hiroshima, Japan
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2
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Wu X, Yuan X, Zhao J, Ji D, Guo H, Yao W, Li X, Zhang L. Study on the effects of different pectinase/cellulase ratios and pretreatment times on the preparation of nanocellulose by ultrasound-assisted bio-enzyme heat treatment. RSC Adv 2023; 13:5149-5157. [PMID: 36777933 PMCID: PMC9909377 DOI: 10.1039/d2ra08172e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/25/2023] [Indexed: 02/11/2023] Open
Abstract
With the development of science and technology, efficient, fast and green methods are increasingly being pursued. The production of nanocellulose by green methods, such as bio-enzymes-assisted ultrasound treatment, has been the focus of many studies. However, the yield of cellulose nanocrystals prepared by this method is very low. In this paper, by pretreatment of microcrystalline cellulose (MCC), nanocellulose was prepared by heating and stirring + pectinase/cellulase + ultrasonic treatment (HSt - P/C - Ultr). The effects of the ratios of pectinase and cellulase and the hydrolysis time on the yield of nanocellulose were studied. FTIR, XRD, SEM, TEM and TG were used to determine the structure, crystallinity, morphology and thermal stability of nanocellulose. The results showed that optimal hydrolysis conditions were determined as a pectinase : cellulase ratio of 1 : 1, 90 min and 50 °C. The yield of nanocellulose was about 32.0%. The yield of pectinase cellulase = 1 : 1 was higher than that of microcrystalline cellulose (MCC) treated by a single bio-enzyme. This indicated that the synergistic effects of pectinase and cellulase have a certain effect on the formation of nanocellulose. During the preparation, the crystalline form of cellulose did not change. It was still cellulose I with a crystallinity of 73.5%, which is 9.50% higher than that of microcrystalline cellulose (MCC), a width of 20-50 nm, a high aspect ratio and a winding network structure. Therefore, nanocellulose prepared by this method is an ideal toughening material for manufacturing composite materials.
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Affiliation(s)
- Xiaoxiao Wu
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Xushuo Yuan
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Jiaxin Zhao
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Decai Ji
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Haiyang Guo
- College of Biological, Chemical Sciences and Engineering, Jiaxing University Jiaxing 314001 Zhejiang China
| | - Wentao Yao
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Xiaoping Li
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
| | - Lianpeng Zhang
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University Kunming 650224 Yunnan China
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3
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He H, An F, Wang Y, Wu W, Huang Z, Song H. Effects of pretreatment, NaOH concentration, and extraction temperature on the cellulose from Lophatherum gracile Brongn. Int J Biol Macromol 2021; 190:810-818. [PMID: 34530035 DOI: 10.1016/j.ijbiomac.2021.09.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/26/2021] [Accepted: 09/07/2021] [Indexed: 01/24/2023]
Abstract
Lophatherum gracile Brongn. (LGB), a homology material of medicine and food, has plentiful cellulose. Aiming to investigate the physiochemical characteristic differences of LGB cellulose extracted by various pretreatment methods and extraction conditions, the effect of dry crushing and wet beating, and the alkaline solution concentration and temperature were compared. Results showed that the extracted cellulose after dry crushing pretreatment had higher purity and lower non-cellulosic components such as hemicellulose, lignin and ash than those obtained by wet beating pretreatment. Furthermore, the impurities were more thoroughly removed by the alkaline solution at high concentration and temperature. Structural characterization revealed that the cellulose obtained by wet beating pretreatment had more fibrillation and smaller particle size, while destroyed crystallinity resulting in bad thermal stability. The alkaline solution temperature had no effect on the morphology and particle size, but high alkaline solution temperature (90 °C) improved crystallinity and thermal stability. Furtherly, the cellulose II produced by at high alkaline solution concentration (18 wt%) exhibited denser surface, smaller particle size and higher thermal stability than the cellulose I extracted at low alkaline solution concentration (4 wt%). Especially, the crystallinity of cellulose II was higher than that of cellulose I with dry crushing pretreatment, while the cellulose obtained by wet beating displayed an opposite trend. Hydration properties indicated that the water holding capacity, oil binding capacity and swelling capacity of the cellulose pretreated by dry crushing were higher than those of the cellulose pretreated by wet beating, and the cellulose I exhibited higher hydration properties compared to the cellulose II, which may depend on its loose network structure. This study suggested that dry crushing pretreatment and high alkaline solution temperature could effectively improve functional properties of LGB cellulose I and II, which promoted its use in food applications.
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Affiliation(s)
- Hong He
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China
| | - Fengping An
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China; Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fuzhou, Fujian, PR China
| | - Yiwei Wang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China
| | - Wanying Wu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China
| | - Zhiwei Huang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China; Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fuzhou, Fujian, PR China.
| | - Hongbo Song
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, PR China; Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fuzhou, Fujian, PR China.
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4
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Ling Z, Tang W, Su Y, Shao L, Wang P, Ren Y, Huang C, Lai C, Yong Q. Promoting enzymatic hydrolysis of aggregated bamboo crystalline cellulose by fast microwave-assisted dicarboxylic acid deep eutectic solvents pretreatments. BIORESOURCE TECHNOLOGY 2021; 333:125122. [PMID: 33878500 DOI: 10.1016/j.biortech.2021.125122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
Deep eutectic solvents (DESs) have received considerable interests as pretreatment solvents for biorefinery. In the present work, five kinds of dicarboxylic acids based DESs were introduced to pretreatments on moso bamboo (MB) with microwave irradiation assistance. Factors influencing the enzymatic conversion of MB cellulose to glucose were determined. With the fast heating, pretreated samples all present significant delignification and hemicelluloses matrix removal, thus improving the enzymatic conversion yield from 15% of MB to ~60%. For the DESs, hydrogen donors with less carbon atoms (oxalic acid) and more hydroxyl groups (tartaric acid) displayed higher efficiency due to separation of aggregated cellulose microfibrils. The microwave assisted DESs (MW-DESs) pretreatments also contributed to cellulose crystal variations including decrystallization and more exposure of hydrophobic surfaces, which are beneficial for followed cellulase adsorption and hydrolysis. The exploration of fast MW-DESs pretreatments may expand the potentials of lignocellulose biomass on effective and applicable biorefinery.
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Affiliation(s)
- Zhe Ling
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Wei Tang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yan Su
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Lupeng Shao
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Peng Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yuxuan Ren
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Caoxing Huang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Chenhuan Lai
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Qiang Yong
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
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5
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Zhuang H, Lee PH, Wu Z, Jing H, Guan J, Tang X, Tan GYA, Leu SY. Genomic driven factors enhance biocatalyst-related cellulolysis potential in anaerobic digestion. BIORESOURCE TECHNOLOGY 2021; 333:125148. [PMID: 33878497 DOI: 10.1016/j.biortech.2021.125148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/01/2021] [Accepted: 04/04/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion (AD) is a promising technology to recover bioenergy from biodegradable biomass, including cellulosic wastes. Through a few fractionation/separation techniques, cellulose has demonstrated its potential in AD, but the performance of the process is rather substrate-specific, as cellulolysis bacteria are sensitive to the enzyme-substrate interactions. Cellulosome is a self-assembled enzyme complex with many functionalized modules in the bacteria which has been gradually studied, however the genomic fingerprints of the culture-specific cellulosome in AD are relatively unclear especially under processing conditions. To clarify the key factors affecting the cellulosome induced cellulolysis, this review summarized the most recent publications of AD regarding the fates of cellulose, sources and functional genes of cellulosome, and omics methods for functional analyses. Different processes for organic treatment including applying food grinds in sewer, biomass valorization, cellulose fractionation, microaeration, and enzymatic hydrolysis enhanced fermentation, were highlighted to support the sustainable development of AD technology.
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Affiliation(s)
- Huichuan Zhuang
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Po-Heng Lee
- Dept. of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Zhuoying Wu
- Dept. of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Houde Jing
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Jianyu Guan
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Xiaojing Tang
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Giin-Yu Amy Tan
- Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Shao-Yuan Leu
- Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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6
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Enzymatic hydrolysis of cellulose using extracts from insects. Carbohydr Res 2019; 485:107811. [PMID: 31526927 DOI: 10.1016/j.carres.2019.107811] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 09/02/2019] [Accepted: 09/08/2019] [Indexed: 11/20/2022]
Abstract
The use of Zophobas morio extracts in the aspect of cellulose hydrolysis is presented for the first time. The aim of this study was to investigate the action of enzymes obtained from Z. morio on cellulose hydrolysis and to determine their influence on the structural properties of cellulose with use the Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). Cellulose hydrolysis products were analyzed by high performance liquid chromatography (HPLC). This analysis indicated that microcrystalline cellulose with smaller particle size was more susceptible to enzymatically treatment. Moreover, our investigation of cellulase activity showed a different profile of the used enzyme during particular developmental stages of Z. morio. Midgut extracts obtained from adult insects are more effective in degrading cellulose than extracts from larvae. The analysis of cellulose hydrolysis confirms that the efficiency of this reaction also depends on the structure of cellulosic materials and internal conditions of enzymatic reaction. In this study the cellulolytic activity of Z. morio midgut extracts showed that these insects could be valuable sources of cellulases.
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7
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Wang H, Li S, Wu T, Wang X, Cheng X, Li D. A Comparative Study on the Characterization of Nanofibers with Cellulose I, I/II, and II Polymorphs from Wood. Polymers (Basel) 2019; 11:E153. [PMID: 30960137 PMCID: PMC6401748 DOI: 10.3390/polym11010153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/08/2019] [Accepted: 01/14/2019] [Indexed: 12/03/2022] Open
Abstract
Polymorphic changes in cellulose nanofibers (CNFs) are closely related to their properties and applications, and it is of interest to investigate how polymorphic changes influence their properties. A comparative study on the properties of CNFs with cellulose I, I/II, and II polymorphs from wood was conducted herein. CNFs were obtained by chemical extraction combined with a simple and efficient mechanical treatment (one pass through a grinder). This process resulted in a relatively high yield of 80⁻85% after a simple grinding treatment. The polymorphic changes in the CNFs and the chemical composition, morphology, tensile performances, and thermal properties were systematically characterized and compared. The X-ray diffraction and FTIR analyses verified the existence of three types of purified pulps and CNFs with cellulose I, cellulose I/II, and cellulose II polymorphs (CNF-I, CNF-I/II, CNF-II). Morphological observations presented that these three types of CNFs all exhibited high aspect ratios and entangled structures. Tensile testing showed that the CNF films all exhibited high tensile strengths, and the fracture strains of the CNF-I/II (11.8%) and CNF-II (13.0%) films were noticeably increased compared to those of the CNF-I film (6.0%). If CNF-II is used as reinforcing material, its larger fracture strain can improve the mechanical performance of the CNF composites, such as fracture toughness and impact strength. In addition, CNF-I, CNF-I/II, and CNF-II films showed very low thermal expansion in the range 20⁻150 °C, with the coefficient of thermal expansion values of 9.4, 17.1, and 17.3 ppm/K, respectively. Thermogravimetric analysis (TGA) revealed that the degradation temperature of CNF-I and CNF-II was greater than that of CNF-I/II, which was likely due to increased α-cellulose content. This comparative study of the characterization of CNF-I, CNF-I/II, and CNF-II provides a theoretical basis for the application of CNFs with different polymorphs and could broaden the applications of CNFs.
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Affiliation(s)
- Haiying Wang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Suiyi Li
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Tiantian Wu
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Xiaoxuan Wang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Xudong Cheng
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Dagang Li
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
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8
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Yataka Y, Tanaka S, Sawada T, Serizawa T. Mechanically robust crystalline monolayer assemblies of oligosaccharide-based amphiphiles on water surfaces. Chem Commun (Camb) 2019; 55:11346-11349. [DOI: 10.1039/c9cc05629g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cellulose oligomers with a terminal alkyl group at the reducing end formed mechanically robust crystalline monolayers via self-assembly against water surfaces from aqueous solutions in air.
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Affiliation(s)
- Yusuke Yataka
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Meguro-ku
- Japan
| | - Shoki Tanaka
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Meguro-ku
- Japan
| | - Toshiki Sawada
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Meguro-ku
- Japan
- Precursory Research for Embryonic Science and Technology
| | - Takeshi Serizawa
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Meguro-ku
- Japan
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9
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Hu W, Liu C, Liu W, Ren X. The Study on the Stress and Photo-Oxidative Aging of Polyethylene Cable Sheath Under Different Processing Conditions. Macromol Res 2018. [DOI: 10.1007/s13233-018-6052-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Ling Z, Chen S, Zhang X, Takabe K, Xu F. Unraveling variations of crystalline cellulose induced by ionic liquid and their effects on enzymatic hydrolysis. Sci Rep 2017; 7:10230. [PMID: 28860612 PMCID: PMC5579251 DOI: 10.1038/s41598-017-09885-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/28/2017] [Indexed: 11/11/2022] Open
Abstract
Ionic liquid (IL) is one of the pretreatment processes gaining considerable interests to remove the native recalcitrance of lignocellulose. But the cellulose crystalline transformation during the pretreatment and their correlations with enzymatic digestibility have not been fully elucidated. Microcrystalline cellulose (Avicel) and holocellulose, which have differential sources and original crystallinity, were respectively pretreated with 1-butyl-3-methylimidazolium chloride ([C4min]Cl). Cellulose crystalline variations as well as chemical and morphological changes were determined. Crystallinity of different materials was proved to influence the effects of pretreatment and following enzymatic digestibility. Recrystallized cellulose Iβ was revealed from slight initial cellulose Iα of Avicel, which was accomplished via formation of intermediate paracrystalline phases. The conversion yield of IL pretreated Avicel displayed no obvious changes, mainly resulted from initial high crystalline order and the recrystallization behavior. Recalcitrance of holocellulose was destroyed during cellulose allomorph transformation and hemicelluloses extraction, contributing to significant increase of glucose yield up to 92.20%. Explicit comprehension on cellulose supramolecular structure may help provide more efficient process for bioconversion after IL pretreatment.
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Affiliation(s)
- Zhe Ling
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Sheng Chen
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Xueming Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Keiji Takabe
- Laboratory of Tree Cell Biology, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan
| | - Feng Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China.
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Ling Z, Chen S, Zhang X, Xu F. Exploring crystalline-structural variations of cellulose during alkaline pretreatment for enhanced enzymatic hydrolysis. BIORESOURCE TECHNOLOGY 2017; 224:611-617. [PMID: 27816348 DOI: 10.1016/j.biortech.2016.10.064] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/19/2016] [Accepted: 10/20/2016] [Indexed: 05/24/2023]
Abstract
The study aimed to explore the crystallinity and crystalline structure of alkaline pretreated cellulose. The enzymatic hydrolysis followed by pretreatment was conducted for measuring the efficiency of sugar conversion. For cellulose Iβ dominated samples, alkaline pretreatment (<8wt%) caused increased cellulose crystallinity and depolymerized hemicelluloses, that were superimposed to affect the enzymatic conversion to glucose. Varying crystallite sizes and lattice spacings indicated the separation of cellulose crystals during mercerization (8-12wt% NaOH). Completion of mercerization was proved under higher alkaline concentration (14-18wt% NaOH), leading to distortion of crystalline cellulose to some extent. Cellulose II crystallinity showed a stimulative impact on enzymatic hydrolysis due to the weakened hydrophobic interactions within cellulose chains. The current study may provide innovative explanations for enhanced enzymatic digestibility of alkaline pretreated lignocellulosic materials.
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Affiliation(s)
- Zhe Ling
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Sheng Chen
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Xun Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Feng Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
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12
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Yataka Y, Sawada T, Serizawa T. Multidimensional Self-Assembled Structures of Alkylated Cellulose Oligomers Synthesized via in Vitro Enzymatic Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10120-10125. [PMID: 27606835 DOI: 10.1021/acs.langmuir.6b02679] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The self-assembly of biomolecules into highly ordered nano-to-macroscale structures is essential in the construction of biological tissues and organs. A variety of biomolecular assemblies composed of nucleic acids, peptides, and lipids have been used as molecular building units for self-assembled materials. However, crystalline polysaccharides have rarely been utilized in self-assembled materials. In this study, we describe multidimensional self-assembled structures of alkylated cellulose oligomers synthesized via in vitro enzymatic reactions. We found that the alkyl chain length drastically affected the assembled morphologies and allomorphs of cellulose moieties. The modulation of the intermolecular interactions of cellulose oligomers by alkyl substituents was highly effective at controlling their assembly into multidimensional structures. This study proposes a new potential of crystalline oligosaccharides for structural components of molecular assemblies with controlled morphologies and crystal structures.
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Affiliation(s)
- Yusuke Yataka
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshiki Sawada
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Takeshi Serizawa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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13
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Serizawa T, Kato M, Okura H, Sawada T, Wada M. Hydrolytic activities of artificial nanocellulose synthesized via phosphorylase-catalyzed enzymatic reactions. Polym J 2016. [DOI: 10.1038/pj.2015.125] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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14
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Liu Y, Chen J, Wu X, Wang K, Su X, Chen L, Zhou H, Xiong X. Insights into the effects of γ-irradiation on the microstructure, thermal stability and irradiation-derived degradation components of microcrystalline cellulose (MCC). RSC Adv 2015. [DOI: 10.1039/c5ra03300d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The microstructure, thermal stability and irradiated degradation components of microcrystalline cellulose were investigated under 60Co γ-irradiation (0–1400 kGy).
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Affiliation(s)
- Yun Liu
- Beijing Key Laboratory of Bioprocessing
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jingping Chen
- Biotechnology Research Center
- Hunan Academy of Agricultural Sciences
- Changsha 410125
- China
| | - Xiaofeng Wu
- Hunan Institute of Nuclear Agricultural Science and Space Breeding
- Hunan Collaborative Utilization of Botanical Functional Ingredients
- Hunan Academy of Agricultural Sciences
- Changsha 410125
- China
| | - Keqin Wang
- Hunan Institute of Nuclear Agricultural Science and Space Breeding
- Hunan Collaborative Utilization of Botanical Functional Ingredients
- Hunan Academy of Agricultural Sciences
- Changsha 410125
- China
| | - Xiaojun Su
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization
- Hunan Agricultural University
- Changsha 410128
- China
| | - Liang Chen
- Hunan Institute of Nuclear Agricultural Science and Space Breeding
- Hunan Collaborative Utilization of Botanical Functional Ingredients
- Hunan Academy of Agricultural Sciences
- Changsha 410125
- China
| | - Hua Zhou
- Beijing Key Laboratory of Bioprocessing
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Xingyao Xiong
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization
- Hunan Agricultural University
- Changsha 410128
- China
- The Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences
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Kawaguchi H, Uematsu K, Ogino C, Teramura H, Niimi-Nakamura S, Tsuge Y, Hasunuma T, Oinuma KI, Takaya N, Kondo A. Simultaneous saccharification and fermentation of kraft pulp by recombinant Escherichia coli for phenyllactic acid production. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2014.04.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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