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Liu YH, Xu Y, He YT, Wen JL, Yuan TQ. Lignocellulosic biomass-derived functional nanocellulose for food-related applications: A review. Int J Biol Macromol 2024; 277:134536. [PMID: 39111481 DOI: 10.1016/j.ijbiomac.2024.134536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 07/14/2024] [Accepted: 08/04/2024] [Indexed: 08/11/2024]
Abstract
In recent years, nanocellulose (NC) has gained significant attention due to its remarkable properties, such as adjustable surface chemistry, extraordinary biological properties, low toxicity and low density. This review summarizes the preparation of NC derived from lignocellulosic biomass (LCB), including cellulose nanofibrils (CNF), cellulose nanocrystals (CNC), and lignin-containing cellulose nanofibrils (LCNF). It focuses on examining the impact of non-cellulosic components such as lignin and hemicellulose on the functionality of NC. Additionally, various surface modification strategies of NC were discussed, including esterification, etherification and silylation. The review also emphasizes the progress of NC application in areas such as Pickering emulsions, food packaging materials, food additives, and hydrogels. Finally, the prospects for producing NC from LCB and its application in food-related fields are examined. This work aims to demonstrate the effective benefits of preparing NC from lignocellulosic biomass and its potential application in the food industry.
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Affiliation(s)
- Yi-Hui Liu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Ying Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Yu-Tong He
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Jia-Long Wen
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China; State Key Laboratory of Efficient Production of Forest Resources, Beijing Forestry University, Beijing 100083, China.
| | - Tong-Qi Yuan
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China; State Key Laboratory of Efficient Production of Forest Resources, Beijing Forestry University, Beijing 100083, China
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2
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Mou H, Wu T, Wu X, Zhang H, Ji X, Fan H, Song H. Improvement of interface bonding of bacterial cellulose reinforced aged paper by amino-silanization. Int J Biol Macromol 2024; 275:133130. [PMID: 38945703 DOI: 10.1016/j.ijbiomac.2024.133130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 06/04/2024] [Accepted: 06/11/2024] [Indexed: 07/02/2024]
Abstract
The aging of paper seriously threatens the service life of cultural heritage documents. Bacterial cellulose (BC), which has a good fiber aspect ratio and is rich in hydroxyl groups, is suitable for strengthening aged paper. However, a single BC added was not ideal for paper restoration, since only strengthening was not able to resist the persistent acidification of ancient book. In this work, BC was functionalized by 3-aminopropyltriethoxysilane (APTES) to develop the interface bonding with aged paper. Fourier transform infrared (FTIR), X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and elemental analysis identified the successful amino-silanization of BC. The modification parameters were optimized as the concentration of APTES of 5 wt%, the reaction time of 4 h, and the reaction temperature of 80 °C based on a considerable improvement in the strength properties without obvious appearance impact on reinforced papers. Moreover, the pH value of the repaired paper was achieved at 8.03, ensuring the stability of the anti-aging effect. The results confirmed that APTES-BC had great potential applications in ancient books conservation.
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Affiliation(s)
- Hongyan Mou
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China.
| | - Ting Wu
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China
| | - Xiao Wu
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China.
| | - Hongjie Zhang
- National Engineering Lab for Pulp and Paper, China National Pulp and Paper Research Institute Co., Ltd, Beijing 100102, China
| | - Xingxiang Ji
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Huiming Fan
- State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University and Technology, Guangzhou 510640, China
| | - Helong Song
- Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands
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3
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Bajwa DS, Holt G, Stark N, Bajwa SG, Chanda S, Quadir M. Nano Boron Oxide and Zinc Oxide Doped Lignin Containing Cellulose Nanocrystals Improve the Thermal, Mechanical and Flammability Properties of High-Density Poly(ethylene). Polymers (Basel) 2023; 16:36. [PMID: 38201701 PMCID: PMC10780719 DOI: 10.3390/polym16010036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/11/2023] [Accepted: 12/15/2023] [Indexed: 01/12/2024] Open
Abstract
The widely used high-density polyethylene (HDPE) polymer has inadequate mechanical and thermal properties for structural applications. To overcome this challenge, nano zinc oxide (ZnO) and nano boron oxide (B2O3) doped lignin-containing cellulose nanocrystals (L-CNC) were blended in the polymer matrix. The working hypothesis is that lignin will prevent CNC aggregation, and metal oxides will reduce the flammability of polymers by modifying their degradation pathways. This research prepared and incorporated safe, effective, and eco-friendly hybrid systems of nano ZnO/L-CNC and nano B2O3/L-CNC into the HDPE matrix to improve their physio-mechanical and fire-retardant properties. The composites were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, thermo-gravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis, horizontal burning test, and microcalorimetry test. The results demonstrated a substantial increase in mechanical properties and a reduction in flammability. The scanning electron microscope (SEM) images showed some agglomeration and irregular distribution of the inorganic oxides.
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Affiliation(s)
- Dilpreet S. Bajwa
- Mechanical and Industrial Engineering Department, Montana State University, Bozeman, MT 59717, USA;
| | - Greg Holt
- Cotton Production and Processing Research Unit, United States Department of Agriculture, Agricultural Research Service, Lubbock, TX 79403, USA;
| | - Nicole Stark
- Forest Biopolymer Science and Engineering, United States Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI 53726, USA;
| | - Sreekala G. Bajwa
- College of Agriculture, Montana State University, Bozeman, MT 59717, USA;
| | - Saptaparni Chanda
- Mechanical and Industrial Engineering Department, Montana State University, Bozeman, MT 59717, USA;
| | - Mohiuddin Quadir
- Department of Coatings and Polymeric Materials, North Dakota State University; Fargo, ND 58108, USA;
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4
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Ludovici F, Hartmann R, Rudolph M, Liimatainen H. Thiol-Silylated Cellulose Nanocrystals as Selective Biodepressants in Froth Flotation. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:16176-16184. [PMID: 38022739 PMCID: PMC10647933 DOI: 10.1021/acssuschemeng.3c04013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023]
Abstract
The extraction of various minerals is commonly conducted through froth flotation, which is a versatile separation method in mineral processing. In froth flotation, depressants are employed to improve the flotation selectivity by modifying the wettability of the minerals and reducing their natural or induced floatability. However, the environmental impact of many current flotation chemicals poses a challenge to the sustainability and selectivity of the ore beneficiation processes. To mitigate this issue, cellulose, particularly nanocelluloses, has been explored as a potential alternative to promote sustainable mineral processing. This study focused on silylated cellulose nanocrystals (CNCs) as biodepressants for sulfide minerals in froth flotation. CNCs containing thiol silane groups or bifunctional CNCs containing both thiol and propyl silanes were synthesized using an aqueous silylation reaction, and their performance in the flotation of chalcopyrite and pyrite was investigated in the presence of a sodium isobutyl xanthate collector. The results showed that the modified CNCs exhibited preferential interaction between chalcopyrite, and the flotation recovery of chalcopyrite decreased from ∼76% to ∼24% in the presence of thiol-grafted CNCs at pH 6, while the pyrite recovery decreased only from ∼82% to ∼75%, indicating the efficient selectivity of thiol-silylated CNCs toward chalcopyrite depression.
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Affiliation(s)
- Feliciana Ludovici
- Fiber
and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
| | - Robert Hartmann
- Fraunhofer
Center for Chemical-Biotechnological Processes, 06237 Leuna, Germany
| | - Martin Rudolph
- Helmholtz-Zentrum-Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, 09599 Freiberg, Germany
| | - Henrikki Liimatainen
- Fiber
and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
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5
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Reactivity of Waterlogged Archeological Elm Wood with Organosilicon Compounds Applied as Wood Consolidants: 2D 1H- 13C Solution-State NMR Studies. Molecules 2022; 27:molecules27113407. [PMID: 35684343 PMCID: PMC9181845 DOI: 10.3390/molecules27113407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/02/2022] Open
Abstract
Some organosilicon compounds, including alkoxysilanes and siloxanes, proved effective in stabilizing the dimensions of waterlogged archaeological wood during drying, which is essential in the conservation process of ancient artifacts. However, it was difficult to determine a strong correlation between the wood stabilizing effect and the properties of organosilicon compounds, such as molecular weight and size, weight percent gain, and the presence of other potentially reactive groups. Therefore, to better understand the mechanism behind the stabilization effectiveness, the reactivity of organosilicons with wood polymers was studied using a 2D 1H–13C solution-state NMR technique. The results showed an extensive modification of lignin through its demethoxylation and decarbonylation and also the absence of the native cellulose anomeric peak in siloxane-treated wood. The most substantial reactivity between wood polymers and organosilicon was observed with the (3-mercaptopropyl)trimethoxysilane treatment, showing complete removal of lignin side chains, the lowest syringyl/guaiacyl ratio, depolymerization of cellulose and xylan, and reactivity with the C6 primary hydroxyls in cellulose. This may explain the outstanding stabilizing effectiveness of this silane and supports the conclusion that extensive chemical interactions are essential in this process. It also indicates the vital role of a mercapto group in wood stabilization by organosilicons. This 2D NMR technique sheds new light on the chemical mechanisms involved in organosilicon consolidation of wood and reveals what chemical characteristics are essential in developing future conservation treatments.
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Tian X, Wu M, Wang Z, Zhang J, Lu P. A high-stable soybean-oil-based epoxy acrylate emulsion stabilized by silanized nanocrystalline cellulose as a sustainable paper coating for enhanced water vapor barrier. J Colloid Interface Sci 2022; 610:1043-1056. [PMID: 34872721 DOI: 10.1016/j.jcis.2021.11.149] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/14/2021] [Accepted: 11/24/2021] [Indexed: 01/01/2023]
Abstract
Soybean-oil-based polymer is a promising bio-based water barrier coating on paper packaging but the application is challenged due to its poor water dispersibility. In this present study, 3-aminopropyltriethoxysilane (APTES) modified nanocrystalline cellulose (NCC) was used to implement a stable dispersion of acrylated epoxidized soybean oil (AESO) in water and thus synergistically improved the water vapor barrier properties after coating on paper. APTES-NCC was successfully prepared, and displayed a better interface compatibility with AESO through the Michael addition reaction. Compared with NCC, APTES-NCC displayed an improved hydrophobicity and wettability with AESO, with an increase of contact angle from 38.0° to 76.4°, and a decrease of interfacial tension from 91.5 ± 3.5 mN/m to 82.9 ± 1.8 mN/m. As an emulsifier, APTES-NCC can be more effectively adsorbed on the oil-water interface to form a more stable emulsion than NCC, with a decrease of AESO droplets size from 4.8 µm to 3.1 µm, and a remarkable improvement in static and centrifugal stability. In rheological measurement, the APTES-NCC/AESO emulsion showed a wider linear viscoelastic region (3.4%), better viscoelasticity and thermal curing properties than that of NCC/AESO emulsion, which further explained that the stability of APTES-NCC/AESO emulsion were improved. Therefore, APTES-NCC/AESO emulsion as a coating on paper cured into a continuous barrier film can effectively improve the water vapor barrier properties of paper, and the water vapor transmission rate (WVTR) of paper can be reduced from 1392.8 g/m2•24 h (NCC/AESO emulsion-coated) to 1286.3 g/m2 24 h (APTES-NCC/AESO emulsion-coated), both are significantly lower than that of base paper (1926.7 g/m2•24 h). CLSM testing showed that APTES-NCC could interact effectively with AESO to forming a tight barrier on paper surface and at the same time, sealing the pores inside the paper to resist water vapor penetration. The high-stable AESO emulsion prepared by APTES-NCC is expected to facilitate the utilization of NCC and AESO as a value-added material in making sustainable barrier packaging.
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Affiliation(s)
- Xuwang Tian
- College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Min Wu
- College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhiwei Wang
- College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Jian Zhang
- College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China; Liaoning Key Laboratory of Pulp and Papermaking Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, China
| | - Peng Lu
- College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China.
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7
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da Silva LCE, Gonçalves MC, de Oliveira MG. Nitric oxide-releasing supramolecular cellulose nanocrystals/silsesquioxane foams. Macromol Rapid Commun 2022; 43:e2100930. [PMID: 35267220 DOI: 10.1002/marc.202100930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/13/2022] [Indexed: 11/09/2022]
Abstract
Cellulose nanocrystals (CNC)-based foams are promising tissue engineering materials that may facilitate implant-tissue integration and allow localized and controlled drug delivery. Herein, hybrid CNC-based foams, which are ultralightweight (30 to 100 mg cm-3 ), highly porous (> 95%), ominiphilic and superabsorbent (1500 to 3000 wt% of water and/or toluene uptake) are obtained by the in-situ condensation of poly(ethylene glycol) ditriethoxysilyl (TES-PEG-TES) into a three-dimensional network, where silsesquioxane nanoparticles (SS-NP) are the cross-linking nodes, and CNC are entangled and forming ionic interactions, resulting in a supramolecular structure. In a new approach, using 3-mercaptopropyltrimethoxysilane, sulfhydryl groups are inserted on the SS-NP periphery and S-nitrosated to enable the functionalization of SS-NP with S-nitrosothiol groups, which are capable of releasing nitric oxide (NO), in a process triggered by the hydration of the foams and modulated by the supramolecular structure of the foams. CNC-SS-PEG foams exhibit elevated thermal and structural stability, compressive strength compatible with various soft human tissues, and NO release rates (1 - 18 pmol mg-1 min-1 ) within the range of the beneficial NO actions. Thus, the CNC-SS-PEG foams herein described represent a new platform of supramolecular hybrid materials for localized delivery of NO, with potential uses in tissue engineering and other biomedical applications. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Laura C E da Silva
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. box 6154, Campinas, SP, 13083-970, Brazil
| | - Maria C Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. box 6154, Campinas, SP, 13083-970, Brazil
| | - Marcelo G de Oliveira
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. box 6154, Campinas, SP, 13083-970, Brazil
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Zezhong J, Haiyue W, Rongrong Z, Kun L, Qiao Z, Lei H, Liying G. Preparation and Catalytic Performance of Supramolecular Ionic Liquid Catalyst. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222030132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Dhali K, Daver F, Cass P, Adhikari B. Surface modification of the cellulose nanocrystals through vinyl silane grafting. Int J Biol Macromol 2022; 200:397-408. [PMID: 35041891 DOI: 10.1016/j.ijbiomac.2022.01.079] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/16/2021] [Accepted: 01/12/2022] [Indexed: 01/14/2023]
Abstract
Incompatibility of nanocellulose with non-polar polymer matrices disrupts the interfacial interaction and results in aggregation and phase separation. In this study a facile and environmentally friendly method was used to partially substitute the surface hydroxyl groups by attaching polysiloxane to impart hydrophobic properties. The silanization reaction proceeded with hydrolysis of triethoxyvinylsilane (TEVS) into reactive silanols followed by condensation to form the branched polymer. These polysiloxane oligomers were chemically grafted to form alkoxy silane bonds on the surface of CNCs. A suitable degree of hydrophilic-hydrophobic balance of the modified CNCs was achieved which improved their dispersion in hydrophobic matrix poly(butylene adipate-co-terephthalate) (PBAT). FTIR, NMR (13C and 29Si) and XPS demonstrated successful surface chemical modification and confirmed extent of silanization as a function of silane concentration. XRD showed successful grafting of the vinyl silane agent and confirmed polymorph structure of the nanocellulose was retained. The results from TEM and AFM demonstrated successful coating of nano whiskers at 5 wt% silane loading. The successful grafting of the silane agent with pendant vinyl groups improved surface hydrophobicity. These results show that this facile method produces adequately surface modified CNC which can be used as filler in hydrophobic matrices of bioplastics.
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Affiliation(s)
- Kingshuk Dhali
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia; Department of Post-Harvest Engineering, Faculty of Agricultural Engineering, Bidhan Chandra Krishi Viswavidyalaya, Nadia, W.B., India.
| | - Fugen Daver
- School of Engineering, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Peter Cass
- Manufacturing, Commonwealth Scientific and Industrial Research Organization (CSIRO), Clayton, VIC 3168, Australia
| | - Benu Adhikari
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia.
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Nhi TTY, Cong TD, Hop TTT, Hai LN, Huu NT, Tung NT. Surface Modification of Cellulose Microfibrils with Silane Agent for Eco-Friendly Hydrophobic Coatings. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222030065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Robbins M, Pisupati V, Azzarelli R, Nehme SI, Barker RA, Fruk L, Schierle GSK. Biofunctionalised bacterial cellulose scaffold supports the patterning and expansion of human embryonic stem cell-derived dopaminergic progenitor cells. Stem Cell Res Ther 2021; 12:574. [PMID: 34774094 PMCID: PMC8590306 DOI: 10.1186/s13287-021-02639-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Stem cell-based therapies for neurodegenerative diseases like Parkinson's disease are a promising approach in regenerative medicine and are now moving towards early stage clinical trials. However, a number of challenges remain including the ability to grow stem cells in vitro on a 3-dimensional scaffold, as well as their loss, by leakage or cell death, post-implantation. These issues could, however, be helped through the use of scaffolds that support the growth and differentiation of stem cells both in vitro and in vivo. The present study focuses on the use of bacterial cellulose as an in vitro scaffold to promote the growth of different stem cell-derived cell types. Bacterial cellulose was used because of its remarkable properties such as its wettability, ability to retain water and low stiffness, all of which is similar to that found in brain tissue. METHODS We cultured human embryonic stem cell-derived progenitor cells on bacterial cellulose with growth factors that were covalently functionalised to the surface via silanisation. Epifluorescence microscopy and immunofluorescence were used to detect the differentiation of stem cells into dopaminergic ventral midbrain progenitor cells. We then quantified the proportion of cells that differentiated into progenitor cells and compared the effect of growing cells on biofunctionalised cellulose versus standard cellulose. RESULTS We show that the covalent functionalisation of bacterial cellulose sheets with bioactive peptides improves the growth and differentiation of human pluripotent stem cells into dopaminergic neuronal progenitors. CONCLUSIONS This study suggests that the biocompatible material, bacterial cellulose, has potential applications in cell therapy approaches as a means to repair damage to the central nervous system, such as in Parkinson's disease but also in tissue engineering.
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Affiliation(s)
- Miranda Robbins
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Venkat Pisupati
- John Van Geest Centre for Brain Repair and WT-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0PY, UK
| | - Roberta Azzarelli
- Unit of Cell and Developmental Biology, Department of Biology, University of Pisa, S.S. 12 Abetone e Brennero 4, 56127, Pisa, Italy
- Wellcome - MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, University of Cambridge, Cambridge, CB2 0AW, UK
| | - Samer I Nehme
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Roger A Barker
- John Van Geest Centre for Brain Repair and WT-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0PY, UK
| | - Ljiljana Fruk
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Gabriele S Kaminski Schierle
- Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK.
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12
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Contribution to a Circular Economy Model: From Lignocellulosic Wastes from the Extraction of Vegetable Oils to the Development of a New Composite. Polymers (Basel) 2021; 13:polym13142269. [PMID: 34301027 PMCID: PMC8309261 DOI: 10.3390/polym13142269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/01/2021] [Accepted: 07/06/2021] [Indexed: 12/02/2022] Open
Abstract
The present works focuses on the development of a novel fully bio-based composite using a bio-based high-density polyethylene (Bio-HDPE) obtained from sugar cane as matrix and a by-product of extraction of chia seed oil (CO) as filler, with the objective of achieving a circular economy model. The research aims to revalorize an ever-increasing waste stream produced by the growing interest in vegetable oils. From the technical point of view, the chia seed flour (CSF) was chemically modified using a silane treatment. This treatment provides a better interfacial adhesion as was evidenced by the mechanical and thermal properties as well as field emission scanning electron microscopy (FESEM). The effect of silane treatment on water uptake and disintegration rate was also studied. On the other hand, in a second stage, an optimization of the percentage of treated CSF used as filler was carried out by a complete series of mechanical, thermal, morphological, colour, water absorption and disintegration tests with the aim to evaluate the new composite developed using chia by-products. It is noteworthy as the disintegration rate increased with the addition of CSF filler, which leads to obtain a partially biodegradable wood plastic composite (WPC) and therefore, becoming more environmentally friendly.
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13
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Oberlintner A, Likozar B, Novak U. Hydrophobic functionalization reactions of structured cellulose nanomaterials: Mechanisms, kinetics and in silico multi-scale models. Carbohydr Polym 2021; 259:117742. [PMID: 33674002 DOI: 10.1016/j.carbpol.2021.117742] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/12/2022]
Abstract
Nanoscale-interfaced cellulose nanomaterials are extracted from polysaccharides, which are widely available in nature, biocompatible and biodegradable. Moreover, the latter have a potential to be recycled, upcycled, and formulate therefore a great theoretical predisposition to be used in a number of applications. Nanocrystals, nano-fibrils and nanofibers possess reactive functional groups that enable hydrophobic surface modifications. Analysed literature data, concerning mechanisms, pathways and kinetics, was screened, compared and assessed with regard to the demand of a catalyst, different measurement conditions and added molecule reactions. There is presently only a scarce technique description for carbonOH bond functionalization, considering the elementary chemical steps, sequences and intermediates of these (non)catalytic transformations. The overview of the prevailing basic research together with in silico modelling approach methodology gives us a deeper physical understanding of processes. Finally, to further highlight the applicability of such raw materials, the review of the development in several multidisciplinary fields was presented.
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Affiliation(s)
- Ana Oberlintner
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova Cesta 39, 1000 Ljubljana, Slovenia.
| | - Blaž Likozar
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia; Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot 113, SI-1000, Ljubljana, Slovenia.
| | - Uroš Novak
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.
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14
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Cabrera IC, Berlioz S, Fahs A, Louarn G, Carriere P. Chemical functionalization of nano fibrillated cellulose by glycidyl silane coupling agents: A grafted silane network characterization study. Int J Biol Macromol 2020; 165:1773-1782. [PMID: 33075339 DOI: 10.1016/j.ijbiomac.2020.10.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/29/2020] [Accepted: 10/06/2020] [Indexed: 11/19/2022]
Abstract
Nano fibrillated cellulose (NFC) has turned into a material widely studied due to its desirable performance for numerous organic systems. Nevertheless, its surface is not very compatible with most organic systems; hence, chemical functionalization methods offer a path to solve this problem. In this study, NFC is successfully functionalized with two silane coupling agents: 3-glycidyloxypropyl trimethoxysilane (GPS) and 3-glycidyloxypropyl dimethylethoxysilane (GPMES) by a simple, direct, and environmentally friendly method. Different analyses have been carried out in order to confirm the chemical modification of NFC. ATR-IR, XPS, and 29Si NMR spectroscopies confirmed the chemical modification that allowed the understanding of the structure and the conformation onto the modified NFC surface. SEM and AFM microscopies were performed to study possible alterations in morphology; a slight change was observed. Thermal properties were also analyzed by TGA analysis. It remains stable after chemical functionalization. Grafted NFC showed good performance compared to the pristine one. It allows a better dispersion into organic systems improving their properties.
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Affiliation(s)
- Isis Castro Cabrera
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Sophie Berlioz
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Armand Fahs
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France
| | - Guy Louarn
- Université de Nantes, CNRS, Institut des Matériaux Jean Rouxel, IMN, 2 Rue de la Houssinière, 44 000 Nantes, France
| | - Pascal Carriere
- Université de Toulon, Laboratoire MAtériaux, Polymères, Interfaces et Environnement Marin (MAPIEM), CS 60584, 83 041 Toulon Cedex 9, France.
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15
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Soontornvatin V, Prasansuttiporn T, Thanatvarakorn O, Jittidecharaks S, Hosaka K, Foxton RM, Nakajima M. Bond strengths of three-step etch-and-rinse adhesives to silane contaminated dentin. Dent Mater J 2020; 40:385-392. [PMID: 33208575 DOI: 10.4012/dmj.2020-025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to evaluate the effect of silane coupling agent contamination on the microtensile bond strength (µTBS) of 3-step etch-and-rinse adhesives on dentin. Flat occlusal dentin surfaces were prepared and randomly divided into 8 groups (n=20) based on the tested adhesives; Scotchbond Multi-purpose or Optibond FL, with contamination of an experimental silane (2 vol% of 3-m ethacryloxypropyltrimethoxysilane at pH 4.5) before acid-etching, after-etching or after-priming; while the groups without silane contamination served as controls. µTBS data were analyzed by two-way ANOVA and Tukey's HSD tests at a significance level of 0.05. Additional specimens of contaminated dentin were used to analyze changes in the organic molecules by Fourier transform infrared spectroscopy (FTIR). Silane contamination before acid-etching did not significantly change µTBS (p>0.05), but contamination after-etching and after-priming significantly decreased µTBS of both adhesives (p<0.05). Silane contamination had an adverse effect on the dentin bond strength of 3-step etch-and-rinse adhesives especially after-priming.
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Affiliation(s)
- Vasavat Soontornvatin
- Dentist, Dental Section, Nongsung Hospital.,Master of Science Program in Dentistry, Faculty of Dentistry, Chiang Mai University
| | - Taweesak Prasansuttiporn
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University.,Center of Excellence in Materials Science and Technology, Chiang Mai University
| | | | - Sumana Jittidecharaks
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University
| | - Keiichi Hosaka
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Richard M Foxton
- Restorative Dentistry, King's College London Dental Institute, King's College London
| | - Masatoshi Nakajima
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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16
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Lucia A, Bacher M, van Herwijnen HWG, Rosenau T. A Direct Silanization Protocol for Dialdehyde Cellulose. Molecules 2020; 25:E2458. [PMID: 32466232 PMCID: PMC7287999 DOI: 10.3390/molecules25102458] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 02/02/2023] Open
Abstract
Cellulose derivatives have many potential applications in the field of biomaterials and composites, in addition to several ways of modification leading to them. Silanization in aqueous media is one of the most promising routes to create multipurpose and organic-inorganic hybrid materials. Silanization has been widely used for cellulosic and nano-structured celluloses, but was a problem so far if to be applied to the common cellulose derivative "dialdehyde cellulose" (DAC), i.e., highly periodate-oxidized celluloses. In this work, a straightforward silanization protocol for dialdehyde cellulose is proposed, which can be readily modified with (3-aminopropyl)triethoxysilane. After thermal treatment and freeze-drying, the resulting product showed condensation and cross-linking, which was studied with infrared spectroscopy and 13C and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy. The cross-linking involves both links of the hydroxyl group of the oxidized cellulose with the silanol groups (Si-O-C) and imine-type bonds between the amino group and keto functions of the DAC (-HC=N-). The modification was achieved in aqueous medium under mild reaction conditions. Different treatments cause different levels of hydrolysis of the organosilane compound, which resulted in diverse condensed silica networks in the modified dialdehyde cellulose structure.
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Affiliation(s)
- Arianna Lucia
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Markus Bacher
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Hendrikus W. G. van Herwijnen
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
| | - Thomas Rosenau
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland
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17
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Crosslinked Facilitated Transport Membranes Based on Carboxymethylated NFC and Amine-Based Fixed Carriers for Carbon Capture, Utilization, and Storage Applications. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10010414] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Herein, we report the performances of crosslinked facilitated transport membranes based on carboxymethylated nanofibrils of cellulose (cmNFC) and polyvinylamine (PVAm) with the use of 3-(2-Aminoethylamino) propyltrimethoxysilane (AEAPTMS) as second fixed carrier for CO2 selectivity and permeability. The grafting of AEAPTMS on cmNFC was optimized by following the hydrolysis/condensation kinetics by 29Si Nuclear Magnetic Resonance (NMR) analyses and two different strategies of the process of membrane production were investigated. In optimized conditions, around 25% of the -COOH functions from cmNFC have crosslinked with PVAm. The crosslinked membranes were less sensitive to liquid water and the crystallinity of PVAm was tuned by the conditions of the membrane elaboration. In both processes, CO2 selectivity and permeability were enhanced especially at high water vapor concentration by the use of PVAm and AEAPTMS suggesting the existence of a facilitation effect due to amine-CO2 interaction, while the mechanical integrity of the swollen membranes remained intact.
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18
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Hendren KD, Higgins MA, Long BK, Foster EJ. Cellulose nanocrystal-reinforced poly(5-triethoxysilyl-2-norbornene) composites. Polym Chem 2020. [DOI: 10.1039/c9py00963a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate the reinforcement of a previously inaccessible norbornene-silane with a stiff, bio-based nanofiller.
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Affiliation(s)
- Keith D. Hendren
- Virginia Polytechnic and State University Materials Science and Engineering
- Blacksburg
- USA
| | | | - Brian K. Long
- University of Tennessee Department of Chemistry
- Dr Knoxville
- USA
| | - E. Johan Foster
- Virginia Polytechnic and State University Materials Science and Engineering
- Blacksburg
- USA
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19
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Isotactic Polybutene-1/Bamboo Powder Composites with Excellent Properties at Initial Stage of Molding. Polymers (Basel) 2019; 11:polym11121981. [PMID: 31810159 PMCID: PMC6961014 DOI: 10.3390/polym11121981] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/23/2019] [Accepted: 11/24/2019] [Indexed: 11/30/2022] Open
Abstract
Isotactic polybutylene-1 (iPB) has lots of advantages and is best used as hot water pipe. However, to transform into stable crystal form I, the iPB needs as long as 7 days. In this process, the irreversible damage brings great difficulties to the use of the iPB. The method which convert it directly into crystal I has shortcomings such as being requiring complex operation and being expensive. In this study, an innovative idea was put forward, not paying attention to the crystal transformation of iPB but only focusing on reducing the time it can be applied. In this study, bamboo powder was modified by the silane coupling agent KH570 (KBP) to prepare iPB/KBP composite. The infiltration test and Fourier transform infrared (FTIR) analysis showed that the hydrophilicity of KBP is greatly reduced, which can greatly improve the compatibility of the iPB and KBP. The tensile strength, tensile modulus, flexural strength, and flexural modulus of the composites storage for 3 days is equal to the pure iPB with storage 7 days with the KBP additions of 3%, 3%, 7%, and 5%, respectively. The heat deformation temperature (HDT) of the composite with 3% KBP after 1-day storage reached the value of pure iPB storage for 7 days. This provides more space and possibilities for the industrialization of the iPB. The crystallization behavior of iPB/KBP composites proves that the addition of KBP accelerates the crystallization rate of iPB, but the crystallinity of the iPB/KBP composites is not changed. The SEM photograph of iPB/KBP composites showed that when the KBP addition was low the compatibility between KBP and iPB was good. When the KBP addition was increased the agglomeration of KBP in the iPB was very obvious, which leads to the poor mechanical properties of the composite.
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20
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Grunin L, Oztop MH, Guner S, Baltaci SF. Exploring the crystallinity of different powder sugars through solid echo and magic sandwich echo sequences. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:607-615. [PMID: 30868656 DOI: 10.1002/mrc.4866] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 03/04/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Time-domain nuclear magnetic resonance techniques are frequently used in polymer, pharmaceutical, and food industries as they offer rapid experimentation and generally do not require any considerable preliminary sample preparation. Detection of solid and liquid fractions in a sample is possible with the free induction decay (FID). However, for the classical FID sequence that consists of a single pulse followed by relaxation decay acquisition, the dead time of the probe (ring out of resonance circuitry) occurs and varies between 5 and 15 μs for standard 10-mm tubes. In such a case, there arises a risk that the signal from the solid fraction cannot be detected correctly. To obtain quantitative measurement on crystalline and more mobile amorphous fractions, alternative sequences to the classical FID in the solid-state nuclear magnetic resonance were developed. Solid echo and magic sandwich echo sequences perform the relaxation decay refocusing somehow excluding the dead time problem and allow detection of the signal from the solid fraction. In this study, knowledge of amorphous/crystal fraction, which is obtained through solid echo and magic sandwich echo, has been explored on powder sugar samples for the purpose of developing a groundwork for a reliable quality control method. Different sugars were examined for the utilization of the sequences. What is important to add and make this study unique is that the method proposed did not involve multiparameter fitting of the "bead" pattern FID signal that normally suffers from ambiguity; just the integration of the fast Fourier transform of the solid echo was needed to calculate the second moment, (M2 ).
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Affiliation(s)
- Leonid Grunin
- Department of Physics, Volga State University of Technology, Yoshkar-Ola, Russian Federation
| | - Mecit Halil Oztop
- Department of Food Engineering, Middle East Technical University, Ankara, Turkey
| | - Selen Guner
- Department of Food Engineering, Middle East Technical University, Ankara, Turkey
| | - Saadet Fatma Baltaci
- Department of Food Engineering, Middle East Technical University, Ankara, Turkey
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21
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Silylation of TEMPO oxidized nanocellulose from oil palm empty fruit bunch by 3-aminopropyltriethoxysilane. Int J Biol Macromol 2019; 135:106-112. [DOI: 10.1016/j.ijbiomac.2019.05.161] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/22/2019] [Accepted: 05/21/2019] [Indexed: 11/22/2022]
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22
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Xiong M, Ren Z, Liu W. Fabrication of superhydrophobic and UV-resistant surface on cotton fabric via layer-by-layer assembly of silica-based UV absorber. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1634589] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mimi Xiong
- School of Materials Science and Engineering, South China University of Technology , Guangzhou , PR China
| | - Zhonghai Ren
- Guangdong Inspection and Quarantine Technology Centre , Guangzhou , PR China
| | - Weijin Liu
- School of Materials Science and Engineering, South China University of Technology , Guangzhou , PR China
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23
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Siuda J, Perdoch W, Mazela B, Zborowska M. Catalyzed Reaction of Cellulose and Lignin with Methyltrimethoxysilane-FT-IR, 13C NMR and 29Si NMR Studies. MATERIALS 2019; 12:ma12122006. [PMID: 31234564 PMCID: PMC6631634 DOI: 10.3390/ma12122006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 11/23/2022]
Abstract
It can be found that reaction mechanisms and interactions between wood and organosilicone compounds have not been sufficiently explored. The aim of the study was to determine bonds formed between either cellulose or lignin and methyltrimethoxysilane (MTMOS) during a catalytic silanization reaction. Silanization was performed in the presence of two catalysts of a diverse mechanism of functionalization: aluminum acetylacetonate (Al(acac)3) and acetic acid (AcOH). For this purpose, FT-IR, 13C and 29Si NMR techniques were used. Cellulose silanization efficiency without a catalyst was unlikely. Lignin undergoes a silanization reaction with alkoxysilanes much easier than cellulose. The results showed new bonds between biopolymers and the silanising agent. The new bonds were confirmed by signals at the FT-IR spectra, e.g., 770 cm−1 and 1270 cm−1 (Si–CH3), and at the NMR signal coming from the T1, T2 and T3 structures. Efficiency of reaction was confirmed by atomic absorption spectroscopy (AAS) analysis.
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Affiliation(s)
- Joanna Siuda
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Waldemar Perdoch
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Bartłomiej Mazela
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
| | - Magdalena Zborowska
- Institute of Wood Chemical Technology, Faculty of Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland.
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24
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Mao T, Wei Y, Zheng C, Cheng W, Zhang Z, Zhu Y, Wang R, Zeng Z. Antibacterial Cotton Fabrics Coated by Biodegradable Cationic Silicone Softeners. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Taoyan Mao
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
| | - Yuan Wei
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
| | - Cheng Zheng
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
- Guangzhou Vocational College of Science and Technology, Guangzhou Guangdong 510550 P. R. China
| | - Wenjing Cheng
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 P. R. China
| | - Zhenqiang Zhang
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
| | - Yiting Zhu
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
| | - Runhao Wang
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
| | - Zhaowen Zeng
- School of Chemistry and Chemical EngineeringGuangzhou University Guangzhou 510006 P. R. China
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25
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Travis CR, Mazur LE, Peairs EM, Gaunt GH, Young DD. Mechanistic investigation and further optimization of the aqueous Glaser-Hay bioconjugation. Org Biomol Chem 2019; 17:3396-3402. [PMID: 30869108 PMCID: PMC6482449 DOI: 10.1039/c9ob00327d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Glaser-Hay bioconjugation has recently emerged as an efficient and attractive method to generate stable, useful bioconjugates with numerous applications, specifically in the field of therapeutics. Herein, we investigate the mechanism of the aqueous Glaser-Hay coupling to better understand optimization strategies. In doing so, it was identified that catalase is able to minimize protein oxidation and improve coupling efficiency, suggesting that hydrogen peroxide is produced during the aqueous Glaser-Hay bioconjugation. Further, several new ligands were investigated to minimize protein oxidation and maximize coupling efficiency. Finally, two novel strategies to streamline the Glaser-Hay bioconjugation and eliminate the need for secondary purification have been developed.
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Affiliation(s)
- Christopher R Travis
- Department of Chemistry, College of William & Mary, PO Box 8795, Williamsburg, VA, USA 23185.
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26
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Baatti A, Erchiqui F, Bébin P, Godard F, Bussières D. Fabrication of hydrophobic cellulose nanocrystals. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Abdessamad Baatti
- Université du Québec en Abitibi‐TémiscamingueRouyn‐NorandaQC, J9X 5E4Canada
| | - Fouad Erchiqui
- Université du Québec en Abitibi‐TémiscamingueRouyn‐NorandaQC, J9X 5E4Canada
| | - Philippe Bébin
- Centre de Technologie Minérale et de PlasturgieThetford MinesQC, G6G 1N1Canada
| | - François Godard
- Université du Québec en Abitibi‐TémiscamingueRouyn‐NorandaQC, J9X 5E4Canada
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27
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Sundell BJ, Harrigan DJ, Hayden SC, Vaughn JT, Guzan KA, Lawrence III JA, Ostraat ML. Improved gas transport properties of cellulose acetate via sub-Tg acid-catalyzed silanation. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2018.11.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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28
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Ultralight, hydrophobic, anisotropic bamboo-derived cellulose nanofibrils aerogels with excellent shape recovery via freeze-casting. Carbohydr Polym 2018; 208:232-240. [PMID: 30658796 DOI: 10.1016/j.carbpol.2018.12.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/18/2018] [Accepted: 12/21/2018] [Indexed: 12/24/2022]
Abstract
Cellulose aerogels have shown outstanding potential as renewable functional materials; however, their practical applications are still limited by inherent hydrophilicity and weak mechanical properties. To overcome hydrophilicity and fragility issues of aerogels, in this study, silylated bamboo-derived cellulose nanofibrils (CNF) aerogels with aligned porous structures were achieved by directionally freeze-casting a mixture of CNF suspension and methyltrimethoxysilane sol. The silylated CNF aerogels exhibited distinct aligned lamellar structures and significantly anisotropic mechanical properties. They had improved strength and stiffness in the axial direction (along the freezing direction) and excellent rapid shape recovery ability in the radial direction (perpendicular to the freezing direction) with a significant high shape recovery ratio of 92% after 100 cycles at 80% compression. Owing to their ultra-low density, hydrophobicity, and high compressive recoverability, the silylated CNF aerogels can be potentially used in a wide range of industrial applications, such as hydrophobic polymer nanocomposites, absorbents, and biomedical scaffolds.
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29
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Pang B, Zhang Y, Liu G, She W. Interface Properties of Nanosilica-Modified Waterborne Epoxy Cement Repairing System. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21696-21711. [PMID: 29727157 DOI: 10.1021/acsami.8b04092] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nowadays, numerous concrete structures are urgently needed to be repaired and strengthened for the severe safety and durability of constructions. In this study, a novel type of silane-based interfacial coupling agent (ICA) is prepared by modifying the silane coupling agent (SCA) with a hydrothermally treated nanosilica (HTNS). The effect of ICA on the cement hydration and crystalline form as well as the hydrolysis/condensation extent of siloxanes is illustrated. The bonding strength, morphology and propagation of the interface cracks, and the interfacial ductile fracture characterization are investigated. Besides, the coupling mechanism of ICA in the repaired interface is explored. The results show that HTNS effectively catalyzes SCA hydrolysis and condensation to form Si-O-Si bonding in a neutral environment. The application of ICA on an old cementitious matrix not only significantly improves the bonding strength and toughness of the repair interface, but also mitigates the negative effect of dealcoholization of siloxanes on the hydration of the cement. The repaired interface simultaneously exhibits stiffness, toughness, and multicracking features in the process of straining. On a microlevel, ICA consumes portlandite during cement hydration and finely crystallizes to form a layered plug structure at the repaired interface . With the continuous dissolution of portlandite, the nanosilica in ICA forms a fibrous, stable product with ions and enhances the interfacial pore plug effect.
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30
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Yao C, Yu J, Wang Y, Tang C, Huang C. Acidic pH weakens the bonding effectiveness of silane contained in universal adhesives. Dent Mater 2018. [PMID: 29525358 DOI: 10.1016/j.dental.2018.02.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Some silane-containing universal adhesives were introduced that a separate ceramic primer was unnecessary to glass-ceramic bonding because of incorporated silane. We aimed to investigate the effectiveness of silane in universal adhesives with acidic media. METHODS A functional γ-methacryloxypropyltrimethoxysilane (γ-MPTS) was used, and its pH value was adjusted to 2.7 by adding hydrochloric acid (HCl) or 10-methacryloxydecyl phosphate (MDP). The prepared acidic silane solutions after 2h or 10d storage were characterized by Fourier transform infrared spectroscopy (FTIR), 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Micro-shear bond strength (μSBS) was used to evaluate the bonding performance of glass ceramics. Two silane-containing and two silane-free universal adhesives were included. Field-emission scanning electron microscopy fractography analysis was also performed. RESULTS FTIR, 1H and 13C NMR revealed that the hydrolysis of γ-MPTS and the self-condensation reaction of silanol groups occurred over time under acidic conditions (HCl or MDP solution). This reaction formed the siloxane oligomers. For glass-ceramic bonding, the μSBS of acidic silane after 10 d storage was lower than that of silane stored for 2h storage (p<0.05), although the difference among the μSBS of the four universal adhesives were nonsignificant (p>0.05). Additionally, cohesive failure was the main fracture pattern of universal adhesive bonding. SIGNIFICANCE The effectiveness of silane contained in low pH universal adhesives can be weakened by dehydration self-condensation and consequently became unstable. For the enhancement of glass-ceramic bonding efficiency with universal adhesives, a separate ceramic primer was recommended.
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Affiliation(s)
- Chenmin Yao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jian Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yake Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Chuliang Tang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Cui Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
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Rao J, Zhou Y, Fan M. Revealing the Interface Structure and Bonding Mechanism of Coupling Agent Treated WPC. Polymers (Basel) 2018; 10:polym10030266. [PMID: 30966301 PMCID: PMC6414935 DOI: 10.3390/polym10030266] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 02/23/2018] [Accepted: 02/27/2018] [Indexed: 11/16/2022] Open
Abstract
This paper presents the interfacial optimisation of wood plastic composites (WPC) based on recycled wood flour and polyethylene by employing maleated and silane coupling agents. The effect of the incorporation of the coupling agents on the variation of chemical structure of the composites were investigated by Attenuated total reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and Solid state 13C Nuclear Magnetic Resonance spectroscopy (NMR) analyses. The results revealed the chemical reactions that occurred between the coupling agents and raw materials, which thus contributed to the enhancement of compatibility and interfacial adhesion between the constituents of WPC. NMR results also indicated that there existed the transformation of crystalline cellulose to an amorphous state during the coupling agent treatments, reflecting the inferior resonance of crystalline carbohydrates. Fluorescence Microscope (FM) and Scanning Electron Microscope (SEM) analyses showed the improvements of wood particle dispersion and wettability, compatibility of the constituents, and resin penetration, and impregnation of the composites after the coupling agent treatments. The optimised interface of the composites was attributed to interdiffusion, electrostatic adhesion, chemical reactions, and mechanical interlocking bonding mechanisms.
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Affiliation(s)
- Jiuping Rao
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yonghui Zhou
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, UK.
| | - Mizi Fan
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, UK.
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Yue L, Maiorana A, Khelifa F, Patel A, Raquez JM, Bonnaud L, Gross R, Dubois P, Manas-Zloczower I. Surface-modified cellulose nanocrystals for biobased epoxy nanocomposites. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.11.051] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Surface chemical functionalization of cellulose nanocrystals by 3-aminopropyltriethoxysilane. Int J Biol Macromol 2018; 106:1288-1296. [DOI: 10.1016/j.ijbiomac.2017.08.136] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/15/2017] [Accepted: 08/23/2017] [Indexed: 11/20/2022]
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34
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Rahimi SK, Otaigbe JU. The effects of the interface on microstructure and rheo-mechanical properties of polyamide 6/cellulose nanocrystal nanocomposites prepared by in-situ ring-opening polymerization and subsequent melt extrusion. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.064] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Saini S, Belgacem MN, Bras J. Effect of variable aminoalkyl chains on chemical grafting of cellulose nanofiber and their antimicrobial activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:760-768. [DOI: 10.1016/j.msec.2017.02.062] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 11/08/2016] [Accepted: 02/14/2017] [Indexed: 01/10/2023]
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36
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Applications of bacterial cellulose as precursor of carbon and composites with metal oxide, metal sulfide and metal nanoparticles: A review of recent advances. Carbohydr Polym 2017; 157:447-467. [DOI: 10.1016/j.carbpol.2016.09.008] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/01/2016] [Accepted: 09/03/2016] [Indexed: 12/26/2022]
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37
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Zhou J, Xu T, Wang X, Liu C, Liao X, Huang X, Shi B. A low-cost and water resistant biomass adhesive derived from the hydrolysate of leather waste. RSC Adv 2017. [DOI: 10.1039/c6ra27132d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A low-cost and water resistant biomass adhesive was prepared by using collagen hydrolysate extracted from leather wastes as the starting material and silane coupling agent as the crosslinking agent.
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Affiliation(s)
- Jianfei Zhou
- Department of Biomass Chemistry and Engineering
- Sichuan University
- Chengdu 610065
- China
- National Engineering Laboratory for Clean Technology of Leather Manufacture
| | - Teng Xu
- National Engineering Laboratory for Clean Technology of Leather Manufacture
- Sichuan University
- Chengdu 610065
- China
| | - Xiaoling Wang
- Department of Biomass Chemistry and Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Chang Liu
- Department of Biomass Chemistry and Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Xuepin Liao
- Department of Biomass Chemistry and Engineering
- Sichuan University
- Chengdu 610065
- China
- National Engineering Laboratory for Clean Technology of Leather Manufacture
| | - Xin Huang
- Department of Biomass Chemistry and Engineering
- Sichuan University
- Chengdu 610065
- China
- National Engineering Laboratory for Clean Technology of Leather Manufacture
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture
- Sichuan University
- Chengdu 610065
- China
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38
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Giannici F, Mossuto Marculescu A, Cattaneo AS, Tealdi C, Mustarelli P, Longo A, Martorana A. Covalent and Ionic Functionalization of HLN Layered Perovskite by Sonochemical Methods. Inorg Chem 2016; 56:645-653. [DOI: 10.1021/acs.inorgchem.6b02581] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesco Giannici
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
| | - Adriana Mossuto Marculescu
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
| | - Alice Silvia Cattaneo
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Cristina Tealdi
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Piercarlo Mustarelli
- Dipartimento di Chimica Sezione di Chimica-Fisica, Università degli Studi di Pavia, Via Taramelli 16, I-2700 Pavia, Italy
| | - Alessandro Longo
- CNR−Istituto per lo Studio dei Materiali Nanostrutturati, Via U. La Malfa, I-90146 Palermo, Italy
- Netherlands Organization for Scientific Research at ESRF, F-38043 Grenoble, France
| | - Antonino Martorana
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze ed. 17, I-90128 Palermo, Italy
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39
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Spectroscopic analysis of methacrylate groups introduced on silica particle surfaces by the aza-Michael addition reaction. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0150-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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40
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Loof D, Hiller M, Oschkinat H, Koschek K. Quantitative and Qualitative Analysis of Surface Modified Cellulose Utilizing TGA-MS. MATERIALS 2016; 9:ma9060415. [PMID: 28773537 PMCID: PMC5456835 DOI: 10.3390/ma9060415] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/13/2016] [Accepted: 05/20/2016] [Indexed: 11/16/2022]
Abstract
With the aim to enhance interfacial adhesion of a hydrophobic polymer matrix and cellulosic fibers and fillers, chemical surface modifications with silane coupling agents are performed. Thermogravimetric analysis (TGA) could be used to determine the degree of surface functionalization. However, similar thermal properties of treated and untreated cellulose hamper a precise determination of silane loading. This contribution deals with quantitative determination of silane loading combining both TGA and elemental analysis. Firstly, silane modified celluloses were studied by FT-IR, Raman, solid state NMR spectroscopy, and polarized light microscopy in order to determine functional groups and to study the impact of chemical treatment on cellulose morphology. Secondly, thermal stability and pyrolysis processes were studied by TG-MS analysis. In order to determine the exact silane loading, the mass percentages of the appropriate elements were quantified by elemental analysis and correlated with the charred residues determined by TGA yielding a linear dependency. With that correlation, it was possible to determine silane loadings for additional samples utilizing simple TGA measurements. The main advantage of that approach is that only one calibration is necessary for routine analyses of further samples and TGA-MS coupling gives additional information on thermal stability and pyrolysis routes, simultaneously.
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Affiliation(s)
- Daniel Loof
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, Bremen 28359, Germany.
- Department of Biology/Chemistry (FB2), University of Bremen, Leobener Strasse NW2C, Bremen 28359, Germany.
| | - Matthias Hiller
- Department NMR-supported Structural Biology, Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, Berlin 13125, Germany.
| | - Hartmut Oschkinat
- Department NMR-supported Structural Biology, Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, Berlin 13125, Germany.
| | - Katharina Koschek
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, Bremen 28359, Germany.
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41
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Mi D, La R, Chen W, Zhang J. Different kinds of transcrystallinity developed from glass fiber/isotactic polypropylene/β-nucleation agents composite by microinjection molding. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3787] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dashan Mi
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Renxi La
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Wanwan Chen
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
| | - Jie Zhang
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu China
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42
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Hettegger H, Beaumont M, Potthast A, Rosenau T. Aqueous Modification of Nano- and Microfibrillar Cellulose with a Click Synthon. CHEMSUSCHEM 2016; 9:75-9. [PMID: 26612209 DOI: 10.1002/cssc.201501358] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 10/13/2015] [Indexed: 05/24/2023]
Abstract
The modification of cellulose as a renewable resource has received wide attention in research and industry. A major problem regarding chemical modification, including heating and drying, is related to hornification that causes pore-system collapse and results in decreased reactivity and changes in the 3D structure of the material. A mild and green approach for the modification of different never-dried and thus wet cellulose substrates (pulp, nanostructured celluloses, and viscose fibers) by an alkoxysilane-azide in water is presented. A kinetic study of the silanization reaction demonstrates that alkoxy-trans-silanization of the cellulose surface is accomplished in water as a suspension medium within a few hours at room temperature. The resulting, azido-equipped celluloses are widely applicable precursor materials for subsequent functionalization by so-called click chemistry, for example, with a fluorescent Rhodamine derivative as a representative reagent. Successful covalent bonding was shown by GPC and a model reaction. The 3D structure of the materials remained intact, as was inter alia visualized by optical and fluorescence microscopy.
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Affiliation(s)
- Hubert Hettegger
- University of Natural Resources and Life Sciences Vienna (BOKU), Department of Chemistry, Division of Chemistry of Renewable Resources, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Marco Beaumont
- University of Natural Resources and Life Sciences Vienna (BOKU), Department of Chemistry, Division of Chemistry of Renewable Resources, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Antje Potthast
- University of Natural Resources and Life Sciences Vienna (BOKU), Department of Chemistry, Division of Chemistry of Renewable Resources, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Thomas Rosenau
- University of Natural Resources and Life Sciences Vienna (BOKU), Department of Chemistry, Division of Chemistry of Renewable Resources, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria.
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43
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Revisiting the Challenges in Fabricating Uniform Coatings with Polyfunctional Molecules on High Surface Energy Materials. COATINGS 2015. [DOI: 10.3390/coatings5041002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Lee H, Sung D, Kim J, Kim BT, Wang T, An SSA, Seo SW, Yi DK. Silica nanoparticle-based dual imaging colloidal hybrids: cancer cell imaging and biodistribution. Int J Nanomedicine 2015; 10 Spec Iss:215-25. [PMID: 26357472 PMCID: PMC4559254 DOI: 10.2147/ijn.s88311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In this study, fluorescent dye-conjugated magnetic resonance (MR) imaging agents were investigated in T mode. Gadolinium-conjugated silica nanoparticles were successfully synthesized for both MR imaging and fluorescence diagnostics. Polyamine and polycarboxyl functional groups were modified chemically on the surface of the silica nanoparticles for efficient conjugation of gadolinium ions. The derived gadolinium-conjugated silica nanoparticles were investigated by zeta potential analysis, transmission electron microscopy, inductively coupled plasma mass spectrometry, and energy dispersive x-ray spectroscopy. MR equipment was used to investigate their use as contrast-enhancing agents in T1 mode under a 9.4 T magnetic field. In addition, we tracked the distribution of the gadolinium-conjugated nanoparticles in both lung cancer cells and organs in mice.
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Affiliation(s)
- Haisung Lee
- Molecular Diagnostics, In Vitro Diagnostics Unit, New Business Division, SK Telecom, Republic of Korea
| | - Dongkyung Sung
- Department of Life Sciences, Graduate School of Korea University, Seoul, Republic of Korea
| | - Jinhoon Kim
- Interdisciplinary Graduate Program of Biomedical Engineering, School of Medicine, Sungkyunkwan University, Samsung Medical Center, Seoul, Republic of Korea
| | - Byung-Tae Kim
- Interdisciplinary Graduate Program of Biomedical Engineering, School of Medicine, Sungkyunkwan University, Samsung Medical Center, Seoul, Republic of Korea
| | - Tuntun Wang
- Department of Chemistry, Myongji University, Seoul, Republic of Korea
| | - Seong Soo A An
- Department of Bionanotechnology, Gachon Medical Research Institute, Gachon University, Seongnam, Republic of Korea
| | - Soo-Won Seo
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Republic of Korea
| | - Dong Kee Yi
- Department of Chemistry, Myongji University, Seoul, Republic of Korea
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45
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Taokaew S, Phisalaphong M, Newby BMZ. Modification of Bacterial Cellulose with Organosilanes to Improve Attachment and Spreading of Human Fibroblasts. CELLULOSE (LONDON, ENGLAND) 2015; 22:2311-2324. [PMID: 26478661 PMCID: PMC4607077 DOI: 10.1007/s10570-015-0651-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bacterial Cellulose (BC) synthesized by Acetobacter xylinum has been a promising candidate for medical applications. Modifying BC to possess the properties needed for specific applications has been reported. In this study, BCs functionalized by organosilanes were hypothesized to improve the attachment and spreading of Normal Human Dermal Fibroblast (NHDF). The BC gels obtained from biosynthesis were dried by either ambient-air drying or freeze drying. The surfaces of those dried BCs were chemically modified by grafting methyl terminated octadecyltrichlorosilane (OTS) or amine terminated 3-aminopropyltriethoxysilane (APTES) to expectedly increase hydrophobic or electrostatic interactions with NHDF cells, respectively. NHDF cells improved their attachment and spreading on the majority of APTES-modified BCs (∼70-80% of area coverage by cells) with more rapid growth (∼2.6-2.8× after incubations from 24 to 48h) than on tissue culture polystyrene (∼2×); while the inverse results (< 5% of area coverage and stationary growth) were observed on the OTS-modified BCs. For organosilane modified BCs, the drying method had no effect on in vitro cell attachment/spreading behaviors.
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Affiliation(s)
- Siriporn Taokaew
- Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325-3906, United States
| | - Muenduen Phisalaphong
- Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bi-min Zhang Newby
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325-3906, United States
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46
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Hettegger H, Sumerskii I, Sortino S, Potthast A, Rosenau T. Silane meets click chemistry: towards the functionalization of wet bacterial cellulose sheets. CHEMSUSCHEM 2015; 8:680-687. [PMID: 25586200 DOI: 10.1002/cssc.201402991] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Indexed: 06/04/2023]
Abstract
The modification of cellulosic materials is of great interest in materials research. Wet bacterial cellulose sheets were modified by an alkoxysilane under mild conditions to make them accessible to click chemistry derivatization. For this purpose (3-azidopropyl)triethoxysilane was grafted covalently onto the cellulosic surface. The silanized bacterial cellulose sheets were characterized comprehensively by attenuated total reflectance FTIR spectroscopy, solid-state NMR spectroscopy, thermogravimetric analysis, SEM with energy-dispersive X-ray spectroscopy, and elemental analysis. To demonstrate subsequent click chemistry functionalization, a new fluorophore based on fluorescein was synthesized and clicked to the silane-modified bacterial cellulose. The new method renders bacterial cellulose and other never-dried cellulosic materials susceptible to direct and facile functionalization in an aqueous medium without the need to work in water-free organic phases or to employ extensive protecting group chemistry and functional group interconversion.
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Affiliation(s)
- Hubert Hettegger
- University of Natural Resources and Life Sciences Vienna (BOKU), Department of Chemistry, Division of Chemistry of Renewable Resources, Christian-Doppler Laboratory "Advanced Cellulose Chemistry and Analytics", Konrad-Lorenz-Straße 24, 3430 Tulln (Austria), Fax: (+43) 1-47654-6059
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47
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Es-haghi H, Mirabedini S, Imani M, Farnood R. Preparation and characterization of pre-silane modified ethyl cellulose-based microcapsules containing linseed oil. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Mabrouk AB, Salon MB, Magnin A, Belgacem M, Boufi S. Cellulose-based nanocomposites prepared via mini-emulsion polymerization: Understanding the chemistry of the nanocellulose/matrix interface. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.077] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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49
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Galland S, Leterrier Y, Nardi T, Plummer CJG, Månson JAE, Berglund LA. UV-cured cellulose nanofiber composites with moisture durable oxygen barrier properties. J Appl Polym Sci 2014. [DOI: 10.1002/app.40604] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sylvain Galland
- Department of Fiber and Polymer Technology; School of Chemical Science and Engineering, Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Tommaso Nardi
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Christopher J. G. Plummer
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Jan Anders E. Månson
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
| | - Lars A. Berglund
- Department of Fiber and Polymer Technology; School of Chemical Science and Engineering, Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
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50
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Zhang G, Lin S, Wyman I, Zou H, Hu J, Liu G, Wang J, Li F, Liu F, Hu M. Robust superamphiphobic coatings based on silica particles bearing bifunctional random copolymers. ACS APPLIED MATERIALS & INTERFACES 2013; 5:13466-13477. [PMID: 24256180 DOI: 10.1021/am404317c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Reported herein is the growth of bifunctional random copolymer chains from silica particles through a "grafting from" approach and the use of these copolymer-bearing particles to fabricate superamphiphobic coatings. The silica particles had a diameter of 90 ± 7 nm and were prepared through a modified Stöber process before atom transfer radical polymerization (ATRP) initiators were introduced onto their surfaces. Bifunctional copolymer chains bearing low-surface-free-energy fluorinated units and sol-gel-forming units were then grafted from these silica particles by surface-initiated ATRP. Perfluorooctyl ethyl acrylate (FOEA) and 3-(triisopropyloxy)silylpropyl methacrylate (IPSMA) were respectively used as fluorinated and sol-gel-forming monomers in this reaction. Hydrolyzing the IPSMA units in the presence of an acid catalyst yielded silica particles that were adorned with silanol-bearing copolymer chains. Coatings were prepared by spraying these hydrolyzed silica particles onto glass and cotton substrates. A series of four different copolymer-functionalized silica particles samples bearing copolymers with similar FOEA molar fractions (fF) of ~80% but with different copolymer grafting mass ratios (gm) that ranged between 12.3 wt% and 58.8 wt%, relative to silica, were prepared by varying the polymerization protocols. These copolymer-bearing silica particles with a gm exceeding 34.1 wt% were used to coat glass and cotton substrates, yielding superamphiphobic surfaces. More importantly, these particulate-based coatings were robust and resistant to solvent extraction and NaOH etching thanks to the self-cross-linking of the copolymer chains and their covalent attachment to the substrates.
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Affiliation(s)
- Ganwei Zhang
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences , Guangzhou, People's Republic of China , 510650
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