1
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Chen Y, Nishiyama Y, Lu A, Fang Y, Shao Z, Hu T, Ye D, Qi H, Li X, Wohlert J, Chen P. The thermodynamics of enhanced dope stability of cellulose solution in NaOH solution by urea. Carbohydr Polym 2023; 311:120744. [PMID: 37028854 DOI: 10.1016/j.carbpol.2023.120744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/10/2023] [Accepted: 02/22/2023] [Indexed: 03/07/2023]
Abstract
The addition of urea in pre-cooled alkali aqueous solution is known to improve the dope stability of cellulose solution. However, its thermodynamic mechanism at a molecular level is not fully understood yet. By using molecular dynamics simulation of an aqueous NaOH/urea/cellulose system using an empirical force field, we found that urea was concentrated in the first solvation shell of the cellulose chain stabilized mainly by dispersion interaction. When adding a glucan chain into the solution, the total solvent entropy reduction is smaller if urea is present. Each urea molecule expelled an average of 2.3 water molecules away from the cellulose surface, releasing water entropy that over-compensates the entropy loss of urea and thus maximizing the total entropy. Scaling the Lennard-Jones parameter and atomistic partial charge of urea revealed that direct urea/cellulose interaction was also driven by dispersion energy. The mixing of urea solution and cellulose solution in the presence or absence of NaOH are both exothermic even after correcting for the contribution from dilution.
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Affiliation(s)
- Yu Chen
- Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, 100081 Beijing, PR China
| | | | - Ang Lu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yan Fang
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian 350007, PR China
| | - Ziqiang Shao
- Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, 100081 Beijing, PR China
| | - Tao Hu
- School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, China
| | - Dongdong Ye
- School of Textile Materials and Engineering, Wuyi University, Jiangmen 529020, PR China
| | - Haisong Qi
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, PR China
| | - Xiaodong Li
- School of Materials Science and Engineering, Beijing Institute of Technology, 100081 Beijing, PR China
| | - Jakob Wohlert
- Wallenberg Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-10044 Stockholm, Sweden.
| | - Pan Chen
- Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, 100081 Beijing, PR China.
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2
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Cryogenic grinding of cotton fiber cellulose: The effect on physicochemical properties. Carbohydr Polym 2022; 289:119408. [DOI: 10.1016/j.carbpol.2022.119408] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 11/18/2022]
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3
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Kong F, Zeng Q, Li Y, Guo X. Effect of Steam Explosion on Structural Characteristics of β-Conglycinin and Morphology, Chemical Compositions of Soybean Meal. Front Nutr 2022; 9:896664. [PMID: 35719153 PMCID: PMC9202520 DOI: 10.3389/fnut.2022.896664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, steam explosion was applied as a means to degrade β-conglycinin. We investigated changes in morphology, the chemical composition of soybean meal, and the structural characteristics of β-conglycinin. The results showed that steam explosion at 0.7 MPa for 8 min could effectively decrease the β-conglycinin content of soybean meal while the histamine content was not increased. The structural characteristics of soybean meal proteins were analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), Fourier transform infrared spectroscopy (FTIR), circular dichroism (CD), and X-ray diffraction (XRD). Steam explosion caused the degradation of high weight proteins and reduced the band density of α', α, and β subunits in β-conglycinin. The micro-surface of soybean meal seemed to be in the cracked or puffed stage and the color became brown or dark after steam explosion. Steam explosion facilitated the dissolution of water-extractable arabinoxylans, which are 4.81 fold higher than that of native soybean meal. Phytic acid was exposed to the hydrothermal environment of the steam explosion process and consequently degraded by 12.95-24.69%. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of soybean meal extract was gradually increased from 20.70 to 33.71% with the rising of treated pressure from 0.3 to 0.7 MPa, which was 1.11-1.81 fold of native extract. The steam explosion may be a new modification technology that could decrease antigenicity, and steam-exploded soybean meal (0.7 MPa, 8 min) with lower β-conglycinin and phytic acid content that could be widely used in food products.
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Affiliation(s)
| | | | | | - Xingfeng Guo
- College of Agronomy, Liaocheng University, Liaocheng, China
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4
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Acharya S, Liyanage S, Parajuli P, Rumi SS, Shamshina JL, Abidi N. Utilization of Cellulose to Its Full Potential: A Review on Cellulose Dissolution, Regeneration, and Applications. Polymers (Basel) 2021; 13:4344. [PMID: 34960895 PMCID: PMC8704128 DOI: 10.3390/polym13244344] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 12/17/2022] Open
Abstract
As the most abundant natural polymer, cellulose is a prime candidate for the preparation of both sustainable and economically viable polymeric products hitherto predominantly produced from oil-based synthetic polymers. However, the utilization of cellulose to its full potential is constrained by its recalcitrance to chemical processing. Both fundamental and applied aspects of cellulose dissolution remain active areas of research and include mechanistic studies on solvent-cellulose interactions, the development of novel solvents and/or solvent systems, the optimization of dissolution conditions, and the preparation of various cellulose-based materials. In this review, we build on existing knowledge on cellulose dissolution, including the structural characteristics of the polymer that are important for dissolution (molecular weight, crystallinity, and effect of hydrophobic interactions), and evaluate widely used non-derivatizing solvents (sodium hydroxide (NaOH)-based systems, N,N-dimethylacetamide (DMAc)/lithium chloride (LiCl), N-methylmorpholine-N-oxide (NMMO), and ionic liquids). We also cover the subsequent regeneration of cellulose solutions from these solvents into various architectures (fibers, films, membranes, beads, aerogels, and hydrogels) and review uses of these materials in specific applications, such as biomedical, sorption, and energy uses.
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Affiliation(s)
| | | | | | | | | | - Noureddine Abidi
- Department of Plant and Soil Science, Fiber and Biopolymer Research Institute, Texas Tech University, Lubbock, TX 79409, USA; (S.A.); (S.L.); (P.P.); (S.S.R.); (J.L.S.)
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5
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Surface and Interface Treatments on Wooden Artefacts: Potentialities and Limits of a Non-Invasive Multi-Technique Study. COATINGS 2020. [DOI: 10.3390/coatings11010029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Wooden artefacts embrace wide-ranging types of objects, like paintings on panel, sculptures, musical instruments, and furniture. Generally, in the manufacturing process of an artwork, wood is firstly treated with organic and inorganic materials to make it nonporous and morphologically homogeneous, and, at last, the surface treatment consists of varnishes or coatings applied with the aims of conferring aesthetic properties and protecting wood from biological growth and external degradation agents, as well as mechanical damage. In this work, different wooden mock-ups were prepared by varying some parameters: concentration of filler and pigment, respectively, in the ground and paint layers, thickness of the protective varnish coat, and sequence of the layers. The mock-ups were subsequently exposed to time-varying artificial aging processes. The multi-analytical non-invasive approach involved spectroscopic (reflection FT-IR, Raman, and X-ray fluorescence), tomographic (optical coherence tomography) and colorimetric techniques. Data were interpreted using both univariate and multivariate methods. The aim was to evaluate potential and limits of each non-invasive technique into the study of different stratigraphies of wooden artworks. This approach was supported by microscopic observations of cross-sections obtained from selected mock-ups. The methodological approach proposed here would add valuable technical know-how and information about the non-invasive techniques applied to the study of wooden artworks.
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6
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Wright A, Marsh A, Ricciotti F, Shaw A, Iza F, Holdich R, Bandulasena H. Microbubble-enhanced dielectric barrier discharge pretreatment of microcrystalline cellulose. BIOMASS & BIOENERGY 2018; 118:46-54. [PMID: 31007419 PMCID: PMC6473562 DOI: 10.1016/j.biombioe.2018.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 08/09/2018] [Accepted: 08/20/2018] [Indexed: 05/17/2023]
Abstract
Cellulose recalcitrance is one of the major barriers in converting renewable biomass to biofuels or useful chemicals. A pretreatment reactor that forms a dielectric barrier discharge plasma at the gas-liquid interface of the microbubbles has been developed and tested to pretreat α-cellulose. Modulation of the plasma discharge provided control over the mixture of species generated, and the reactive oxygen species (mainly ozone) were found to be more effective in breaking-up the cellulose structure compared to that of the reactive nitrogen species. The effectiveness of pretreatment under different conditions was determined by measuring both the solubility of treated samples in sodium hydroxide and conversion of cellulose to glucose via enzymatic hydrolysis. Solutions pretreated under pH 3 buffer solutions achieved the best result raising the solubility from 17% to 70% and improving the glucose conversion from 24% to 51%. Under the best conditions, plasma-microbubble treatment caused pronounced crevices on the cellulose surface enhancing access to the reactive species for further breakdown of the structure and to enzymes for saccharification.
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Affiliation(s)
- Alexander Wright
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
| | - Adam Marsh
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
| | - Federica Ricciotti
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40136, Italy
| | - Alex Shaw
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
| | - Felipe Iza
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
| | - Richard Holdich
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
| | - Hemaka Bandulasena
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
- Corresponding author.
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7
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Lorenzo-Hernando A, Martín-Juárez J, Bolado-Rodríguez S. Study of steam explosion pretreatment and preservation methods of commercial cellulose. Carbohydr Polym 2018; 191:234-241. [DOI: 10.1016/j.carbpol.2018.03.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/13/2018] [Accepted: 03/12/2018] [Indexed: 11/24/2022]
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8
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Dou X, Tang Y. The Influence of Cold Caustic Extraction on the Purity, Accessibility and Reactivity of Dissolving-Grade Pulp. ChemistrySelect 2017. [DOI: 10.1002/slct.201701551] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoli Dou
- Department of Wood Science; The University of British Columbia; 2424 Main Mall Vancouver, BC Canada
| | - Yong Tang
- Department of Chemical and Biological Engineering; The University of British Columbia; 2360 East Mall Vancouver, BC Canada
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9
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Lindman B, Medronho B, Alves L, Costa C, Edlund H, Norgren M. The relevance of structural features of cellulose and its interactions to dissolution, regeneration, gelation and plasticization phenomena. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp02409f] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The interactions and structural properties of cellulose influence different phenomena.
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Affiliation(s)
- Björn Lindman
- FSCN
- Mid Sweden University
- SE-851 70 Sundsvall
- Sweden
- Physical Chemistry
| | - Bruno Medronho
- Faculty of Sciences and Technology (MeditBio)
- Ed. 8
- University of Algarve
- 8005-139 Faro
- Portugal
| | - Luis Alves
- CQC
- University of Coimbra
- Department of Chemistry
- 3004-535 Coimbra
- Portugal
| | | | - Håkan Edlund
- FSCN
- Mid Sweden University
- SE-851 70 Sundsvall
- Sweden
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10
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Meng C, Lu H, Cao GP, Yao CW, Liu Y, Zhang QM, Bai YB, Wang H. Activation of Cellulose by Supercritical Tetrafluoroethane and Its Application in Synthesis of Cellulose Acetate. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03418] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chen Meng
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hui Lu
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Gui-Ping Cao
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chen-Wei Yao
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yue Liu
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qi-Ming Zhang
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yun-Bo Bai
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hua Wang
- UNILAB,
State Key Lab of
Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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11
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Alves L, Medronho BF, Antunes FE, Romano A, Miguel MG, Lindman B. On the role of hydrophobic interactions in cellulose dissolution and regeneration: Colloidal aggregates and molecular solutions. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Guo J, Bian YY, Zhu KX, Guo XN, Peng W, Zhou HM. Effect of Steam Flash Explosion Pretreatment on Phytate Degradation of Wheat Bran. FOOD BIOPROCESS TECH 2015. [DOI: 10.1007/s11947-015-1517-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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14
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Manhas N, Balasubramanian K, Prajith P, Rule P, Nimje S. PCL/PVA nanoencapsulated reinforcing fillers of steam exploded/autoclaved cellulose nanofibrils for tissue engineering applications. RSC Adv 2015. [DOI: 10.1039/c4ra17191h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The process of extraction of cellulose nanofibrils by steam explosion followed by electrospinning with biodegradable polymers to yield PCL/PVA nanoencapsulated cellulosic reinforcing fillers for tissue engineering applications.
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Affiliation(s)
- Navdeep Manhas
- Dept. of Mechanical Engineering
- DIAT (DU)
- Ministry of Defence
- Pune-411025
- India
| | - K. Balasubramanian
- Dept. of Materials Engineering
- DIAT (DU)
- Ministry of Defence
- Pune-411025
- India
| | - P. Prajith
- Dept. of Materials Engineering
- DIAT (DU)
- Ministry of Defence
- Pune-411025
- India
| | - Prashant Rule
- Dept. of Materials Engineering
- DIAT (DU)
- Ministry of Defence
- Pune-411025
- India
| | - Sunil Nimje
- Dept. of Mechanical Engineering
- DIAT (DU)
- Ministry of Defence
- Pune-411025
- India
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15
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Medronho B, Lindman B. Competing forces during cellulose dissolution: From solvents to mechanisms. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2013.12.001] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Kang Y, Bansal P, Realff MJ, Bommarius AS. SO2-catalyzed steam explosion: The effects of different severity on digestibility, accessibility, and crystallinity of lignocellulosic biomass. Biotechnol Prog 2013; 29:909-16. [DOI: 10.1002/btpr.1751] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 04/16/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Yuzhi Kang
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology; Atlanta GA 30332-0100
| | - Prabuddha Bansal
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology; Atlanta GA 30332-0100
| | - Matthew J. Realff
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology; Atlanta GA 30332-0100
| | - Andreas S. Bommarius
- School of Chemistry and Biochemistry, Georgia Institute of Technology; Atlanta GA 30332-0400
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17
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Miyamoto H, Ago M, Yamane C, Seguchi M, Ueda K, Okajima K. Supermolecular structure of cellulose/amylose blends prepared from aqueous NaOH solutions and effects of amylose on structural formation of cellulose from its solution. Carbohydr Res 2011; 346:807-14. [DOI: 10.1016/j.carres.2011.01.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 01/28/2011] [Accepted: 01/31/2011] [Indexed: 10/18/2022]
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18
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Kamide K, Saito M. Recent advances in molecuar and supermolecuar characterization of cellulose and cellulose derivatives. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19940830122] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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MIYAMOTO H, YAMANE C, SEGUCHI M, OKAJIMA K. Comparison between Cellulose Blend Films Prepared from Aqueous Sodium Hydroxide Solution and Edible Films of Biopolymers with Possible Application for New Food Materials. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2010. [DOI: 10.3136/fstr.17.21] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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20
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Structural changes and alkaline solubility of wood cellulose fibers after enzymatic peeling treatment. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.08.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Wang K, Jiang JX, Xu F, Sun RC. Influence of steaming explosion time on the physic-chemical properties of cellulose from Lespedeza stalks (Lespedeza crytobotrya). BIORESOURCE TECHNOLOGY 2009; 100:5288-5294. [PMID: 19502052 DOI: 10.1016/j.biortech.2009.05.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 05/14/2009] [Accepted: 05/14/2009] [Indexed: 05/27/2023]
Abstract
The synergistic effect of steam explosion pretreatment and sodium hydroxide post-treatment of Lespedeza stalks (Lespedeza crytobotrya) has been investigated in this study. In this case, Lespedeza stalks were firstly exploded at a fixed steam pressure (22.5 kg/m(2)) for 2-10 min. Then the steam-exploded Lespedeza stalks was extracted with 1 M NaOH at 50 degrees C for 3 h with a shrub to water ratio of 1:20 (g/ml), which yielded 57.3%, 53.1%, 55.4%, 52.8%, 53.2%, and 56.4% (% dry weight) cellulose rich fractions, comparing to 68.0% from non-steam-exploded material. The content of glucose in cellulose rich residues increased with increment of the steaming time and reached to 94.10% at the most severity. The similar increasing trend occurred during the dissolution of hemicelluloses. It is evident that at shorter steam explosion time, autohydrolysis mainly occurred on the hemicelluloses and the amorphous area of cellulose. The crystalline region of cellulose was depolymerized under a prolonged incubation time. The characteristics of the cellulose rich fractions in terms of FT-IR and CP/MAS (13)C NMR spectroscopy and thermal analysis were discussed, and the surface structure was also investigated by SEM.
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Affiliation(s)
- Kun Wang
- Institute of Biomass Chemistry and Technology, Beijing Forestry University, Beijing 100083, China
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22
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MIYAMOTO H, YAMANE C, SEGUCHI M, OKAJIMA K. Structure and Properties of Cellulose-Starch Blend Films Regenerated from Aqueous Sodium Hydroxide Solution. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2009. [DOI: 10.3136/fstr.15.403] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Cherian BM, Pothan LA, Nguyen-Chung T, Mennig G, Kottaisamy M, Thomas S. A novel method for the synthesis of cellulose nanofibril whiskers from banana fibers and characterization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:5617-5627. [PMID: 18570426 DOI: 10.1021/jf8003674] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Alkali treatment coupled with high pressure defibrillation and acid treatment have been tried on banana fibers obtained from the pseudo stem of the banana plant Musa sapientum. The structure and morphology of the fibers have been found to be affected on the basis of the concentration of the alkali and acid and also on the pressure applied. Steam explosion in alkaline medium followed by acidic medium is found to be effective in the depolymerization and defibrillation of the fiber to produce banana nanowhiskers. The chemical constituents of raw and steam exploded fibers were analyzed according to the ASTM standards. Structural analysis of steam exploded fibers was carried out by FTIR and XRD. The fiber diameter and percentage crystallinity of the modified fibers were investigated using X-ray diffraction studies. Characterization of the fibers by SFM and TEM supports the evidence for the development of nanofibrils of banana fibers.
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Affiliation(s)
- Bibin Mathew Cherian
- Post Graduate Department of Chemistry, Bishop Moore College, Mavelikara 690110, Kerala, India
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24
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Zhou J, Zhang L, Shu H, Chen F. Regenerated cellulose films from NaOH/urea aqueous solution by coagulating with sulfuric acid. J MACROMOL SCI B 2007. [DOI: 10.1081/mb-120002342] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jinping Zhou
- a Department of Chemistry , Wuhan University , Wuhan, 430072, People's Republic of China
| | - Lina Zhang
- b Department of Chemistry , Wuhan University , Wuhan, 430072, People's Republic of China
| | - Hong Shu
- a Department of Chemistry , Wuhan University , Wuhan, 430072, People's Republic of China
| | - Fangeng Chen
- c Laboratory of Cellulose and Lignocellulosic Chemistry , Chinese Academy of Sciences , Guangzhou Institute of Chemistry , Guangzhou, 510650, People's Republic of China
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25
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Yang G, Miyamoto H, Yamane C, Okajima K. Structure of Regenerated Cellulose Films from Cellulose/Aqueous NaOH Solution as a Function of Coagulation Conditions. Polym J 2006. [DOI: 10.1295/polymj.pj2006025] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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27
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Kuo YN, Hong J. Investigation of solubility of microcrystalline cellulose in aqueous NaOH. POLYM ADVAN TECHNOL 2005. [DOI: 10.1002/pat.595] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Petreu? O, Bubulac T, Petreu? I, Cazacu G. Reactions of some phosphorus compounds with cellulose dissolved in aqueous alkaline solution. J Appl Polym Sci 2003. [DOI: 10.1002/app.12532] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Abstract
Pure natural cellulose (softwood pulp) modified with cellulase is allowed to react with sodium hydroxide in a muller, and changes in structure and properties are investigated by FTIR and DSC. The reactivity of cellulose for some dissolving and derivatization processes is shown to be improved by an enzymatic hydrolysis and admixture with sodium hydroxide. The modified cellulose dissolved at 9% (wt) sodium hydroxide at -10 degrees C at 6% pulp consistency, while the DP of cellulose is >350.
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Affiliation(s)
- Yu Cao
- School of Chemical Engineering and Materials Science, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing, 100081, PR China
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30
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Yamane C, Mori M, Saito M, Okajima K. Structures and Mechanical Properties of Cellulose Filament Spun from Cellulose/Aqueous NaOH Solution System. Polym J 1996. [DOI: 10.1295/polymj.28.1039] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hongo T, Yamane C, Saito M, Okajima K. Super-Molecular Structures Controlling the Swelling Behavior of Regenerated Cellulose Membranes. Polym J 1996. [DOI: 10.1295/polymj.28.769] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
This paper concerns the morphology of hemp woody core cells, investigated by optical and scanning electron microscopy, and the chemical analysis of the hemp cells. Steam explosion was investigated as a pre-treatment step for woody hemp 'chènevotte', with the aim of optimizing the separation and delignification of woody fibres. In this study, we report the results of five experiments performed on 'chènevotte' samples impregnated in acid solution (0.1% w/w H2SO4) and steamed at 200, 210, 220, 230 and 240 degrees C for 180 s. The effect of process temperatures on the woody hemp core after acidic impregnation was followed by optical and scanning electron microscopy, by assessment of the chemical composition, and by evolution of the average degree of polymerization (DPv) values of the purified wood fibres. We found that treatment at 200 and 210 degrees C led to samples that were difficult to delignigy because the destructuring and disintegration of lignocellulosic materials were insufficient. A temperature of the order of 220-230 degrees C is required to obtain well-separated fibres. However, at a temperature of 240 degrees C, degradation and fibre damage were noted.
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Affiliation(s)
- M R Vignon
- Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), Grenoble, France
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Abstract
For the majority of the last century, commercial routes to regenerated cellulose fibres have coped with the difficulties of making a good cellulose solution by using an easy to dissolve derivative (e.g. xanthate in the case of viscose rayon) or complex (e.g. cuprammonium rayon). For the purposes of this paper, advanced cellulosic fibres are defined as those made from a process involving direct dissolution of cellulose. The first examples of such fibres have now been generically designated as lyocell fibres to distinguish them from rayons, and the first commercial lyocell fibre is Courtaulds' Tencel.
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Miyamoto I, Inamoto M, Matsui T, Saito M, Okajima K. Studies on Structure of Cuprammonium Cellulose I. A Circular Dichroism Study on the Dissolved State of Cellulose in Cuprammonium Solution. Polym J 1995. [DOI: 10.1295/polymj.27.1113] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Matsui T, Sano T, Yamane C, Kamide K, Okajima K. Structure and Morphology of Cellulose Films Coagulated from Novel Cellulose/Aqueous Sodium Hydroxide Solutions by Using Aqueous Sulfuric Acid with Various Concentrations. Polym J 1995. [DOI: 10.1295/polymj.27.797] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Nazhad M, Ramos L, Paszner L, Saddler J. Structural constraints affecting the initial enzymatic hydrolysis of recycled paper. Enzyme Microb Technol 1995. [DOI: 10.1016/0141-0229(94)00057-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ramos L, Nazhad M, Saddler J. Effect of enzymatic hydrolysis on the morphology and fine structure of pretreated cellulosic residues. Enzyme Microb Technol 1993. [DOI: 10.1016/0141-0229(93)90093-h] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kamide K, Miyamoto I, Okajima K. Formation and Properties of the Lyotropic Mesophase of the Cellulose/Mixed Inorganic Acid System. Polym J 1993. [DOI: 10.1295/polymj.25.453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Yasuda K, Saito M, Kamide K. Flow birefringence and viscosity of cellulose solutions in semi-dilute regime. POLYM INT 1993. [DOI: 10.1002/pi.4990300320] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kamide K, Okajima K, Kowsaka K. Dissolution of Natural Cellulose into Aqueous Alkali Solution: Role of Super-Molecular Structure of Cellulose. Polym J 1992. [DOI: 10.1295/polymj.24.71] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Matsuda Y, Kowsaka K, Okajima K, Kamide K. Structural change of cellulose contained in immature cotton boll during its growth. POLYM INT 1992. [DOI: 10.1002/pi.4990270410] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Okajima K, Kowsaka K, Kamide K. An explanation of the solubility behaviour of cellulose acetate in various solvents in terms of supermolecular structure formed by introduction of a substituent group into the glucopyranose unit. POLYM INT 1992. [DOI: 10.1002/pi.4990290110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kowsaka K, Yasuda K, Okajima K, Kamide K. Experimental evidence for the existence of intramolecular hydrogen bonds in the water-insoluble sodium salt of carboxyethyl cellulose solid. POLYM INT 1991. [DOI: 10.1002/pi.4990250206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Yamashiki T, Matsui T, Saitoh M, Matsuda Y, Okajima K, Kamide K, Sawada T. Characterisation of cellulose treated by the steam explosion method. Part 3: Effect of crystal forms (cellulose I, II and III) of original cellulose on changes in morphology, degree of polymerisaion, solubility and supermolecular structure by steam explosion. ACTA ACUST UNITED AC 1990. [DOI: 10.1002/pi.4980220305] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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