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Jiang N, Hu Y, Cheng Y. TEMPO-Oxidized Nanocellulose Films Modified by Tea Saponin Derived from Camellia oleifera: Physicochemical, Mechanical, and Antibacterial Properties. Polymers (Basel) 2024; 16:1016. [PMID: 38611274 PMCID: PMC11014315 DOI: 10.3390/polym16071016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/26/2024] [Accepted: 04/01/2024] [Indexed: 04/14/2024] Open
Abstract
Nanocellulose materials have been widely used in biomedicine, food packaging, aerospace, composite material, and other fields. In this work, cellulose obtained from Camellia shells through alkali boiling and subbleaching was micro-dissolved and regenerated using the DMAc (N,N-Dimethylacetamide)/LiCl system, and TOCNs (TEMPO-oxidized cellulose nanofibers) with different degrees of oxidation. The membrane was prepared by filtration of polytetrafluoroethylene (pore size 0.1 μm), and the oxidized nanocellulose film was obtained after drying, Then, the crystallinity, mechanical properties and oxygen barrier properties of the TOCN film were investigated. Furthermore, based on TS (tea saponin) from Camellia oleifera seed cake and TOCNs, TS-TOCN film was prepared by the heterogeneous reaction. The TS-TOCN film not only shows excellent oxygen barrier properties (the oxygen permeability is 2.88 cc·m-2·d-1) but also has good antibacterial effects on both Gram-negative and Gram-positive bacteria. The antibacterial property is comparable to ZnO-TOCN with the same antibacterial content prepared by the in-situ deposition method. Antioxidant activity tests in vitro showed that TS-TOCN had a significant scavenging effect on DPPH (2,2-Diphenyl-1-picrylhydrazyl) radicals. This design strategy makes it possible for inexpensive and abundant Camellia oleifera remainders to be widely used in the field of biobased materials.
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Affiliation(s)
- Nan Jiang
- School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China; (Y.H.); (Y.C.)
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Wu C, McClements DJ, Ma B, He Z, Wu F, Zhang Y, Liu X, Wang P. Fabrication of composite hydrogels by sonication-assisted assembly of okara cellulose nanofibers and chitosan: structure and properties. J Sci Food Agric 2024; 104:3458-3467. [PMID: 38133630 DOI: 10.1002/jsfa.13231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/23/2023] [Accepted: 12/17/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Okara cellulose is a highly abundant, green, sustainable, and biodegradable polymer with many potential industrial applications. In this study, we fabricated composite hydrogels with okara cellulose nanofibers (CNFs) and chitosan (CH) by hydrating, sonicating, and heating them at 100 °C for 30 min, and then induced their assembly by cooling. The effects of okara CNF (with and without 2,2,6,6-tetramethylpiperidinyloxy (TEMPO) oxidation) and CH concentration on the structure and properties of the hydrogels was examined, including their microstructure, surface properties, rheological properties, and thermal stability. RESULTS Our results indicate that there was an electrostatic attraction between the anionic okara CNF and cationic CH, which facilitated hydrogel formation. The surface, textural, rheological, and thermal stability properties were better for the composite hydrogels than for the single CH ones, as well as for the CNF that had undergone TEMPO oxidation. For the TC-CH hydrogels, the contact angle was 39.5°, the interfacial tension was 69.1 mN m-1 , and the surface tension was 1.44 mN m-1 . CONCLUSION In this study, the novel hydrogels developed may be useful as a soft material in a range of applications in foods, supplements, health care products, cosmetics, and drugs. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Changling Wu
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | | | - Bohui Ma
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | - Zhiping He
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | - Fenghua Wu
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | - Yongzhu Zhang
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | - Xingquan Liu
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
| | - Peng Wang
- Department of Food Science, Zhejiang A&F University, Hangzhou, China
- National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou, China
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Wang F, Borjas A, Bonto A, Ursu AV, Dupont M, Roche J, Delattre C. Exploring Novel Applications for Hydrogels Derived from Modified Celluloses. Polymers (Basel) 2024; 16:530. [PMID: 38399908 PMCID: PMC10892153 DOI: 10.3390/polym16040530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/06/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024] Open
Abstract
The valorization of lignocellulosic biomass by-products holds significant economic and ecological potential, considering their global overproduction. This paper introduces the fabrication of a novel wheat-straw-based hydrogel and a new microcellulose-based hydrogel through 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO) oxidation. In this study, Fourier transform infrared (FTIR) analysis was employed for the detection of carboxyl groups, neutralization titration was conducted using a conductivity meter, viscosity analysis was performed using a rheometer, and transmittance analysis was carried out using a spectrophotometer. Two novel hydrogels based on TEMPO oxidation have been developed. Among them, the bio-based hydrogel derived from oxidized wheat straw exhibited exceptional printability and injectability. We found that the oxidation degree of microcellulose reached 56-69%, and the oxidation degree of wheat straw reached 56-63%. The cross-linking of 4% oxidized wheat straw and calcium chloride was completed in 400 seconds, and the viscosity exceeded 100,000 Pa·s. In summary, we have successfully created low-cost hydrogels through the modification of wheat straw and microcellulose, transforming lignocellulosic biomass by-products into a sustainable source of polymers. This paper verifies the future applicability of biomass materials in 3D printing.
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Affiliation(s)
- Feiyang Wang
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Aldo Borjas
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
- INRAE, Laboratoire de Génétique, Diversité et Écophysiologie des céréales (GDEC), Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Aldrin Bonto
- Department of Chemistry, De La Salle University, 2401 Taft, Avenue, Manila 0922, Philippines
| | - Alina Violeta Ursu
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Maxime Dupont
- INRAE, Laboratoire de Génétique, Diversité et Écophysiologie des céréales (GDEC), Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Jane Roche
- INRAE, Laboratoire de Génétique, Diversité et Écophysiologie des céréales (GDEC), Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Cédric Delattre
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
- Institut Universitaire de France (IUF), 1 Rue Descartes, 75005 Paris, France
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Wu C, McClements DJ, Ma B, Lai Z, Wu F, Liu X, Wang P. Composite hydrogels formed from okara cellulose nanofibers and carrageenan: Fabrication and characterization. Int J Biol Macromol 2024; 258:129079. [PMID: 38161024 DOI: 10.1016/j.ijbiomac.2023.129079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Currently, there is great interest in converting edible agro-waste, such as okara from soybean production, into value-added products. For this study, we focus on fabricating composite hydrogels from okara cellulose nanofibers (CNFs) and carrageenan (CA). We also examined the effects of TEMPO oxidation of the okara CNFs, as well as CA concentration, on the microstructure and physicochemical properties of the composite hydrogels. The water holding capacity, oil holding capacity, surface tension, gel strength, and viscoelasticity of the composite microgels increased with increasing CA concentration, and it was found that the highest values were obtained for TC-CA2 hydrogel: contact angle = 43.6° and surface tension = 45.12 mN/m, which was attributed to the formation of a more regular and dense three-dimensional gel network. All the CNF-CA microgels had highly anionic ζ-potential values (-38.8 to -50.1 mV), with the magnitude of the negative charge increasing with TEMPO oxidation and carrageenan concentration. These results suggest there would be strong electrostatic repulsion between the composite hydrogels. The composite microgels produced in our work may be useful functional materials for utilization within the food industry, thereby converting a waste product into a valuable commodity.
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Affiliation(s)
- Changling Wu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China; Suzhou Zuoci Technology Co., Ltd, Suzhou 215100, China.
| | | | - Bohui Ma
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China
| | - Zhiquan Lai
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China
| | - Fenghua Wu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China
| | - Xingquan Liu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China.
| | - Peng Wang
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China.
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Tang L, Wang B, Bai S, Fan B, Zhang L, Wang F. Preparation and characterization of cellulose nanocrystals with high stability from okara by green solvent pretreatment assisted TEMPO oxidation. Carbohydr Polym 2024; 324:121485. [PMID: 37985081 DOI: 10.1016/j.carbpol.2023.121485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/17/2023] [Accepted: 10/09/2023] [Indexed: 11/22/2023]
Abstract
Because the traditional preparation methods of cellulose nanocrystals (CNCs) involve chemical pollution issues, in this study, two typical green solvents, alkali/urea solvent (AUS) and deep-eutectic solvent (DES), were used to dissolve insoluble soybean fibers (ISF) extracted from okara and prepare regenerated CNCs (AUS/CNC and DES/CNC), which were further modified by TEMPO oxidation (AUS/T-CNC and DES/T-CNC). The recoveries of AUS and DES were 82.58 % and 84.00 %, respectively. Chemical composition analysis showed high cellulose purity (>95 %) of the regenerated CNCs. FTIR, XRD and 13C NMR analysis indicated the cellulose structure and polymorph of CNCs. Thermal analysis revealed that the maximum degradation peak of regenerated CNC shifted to a lower temperature. AFM revealed that CNCs exhibited rod-like fiber structures, while AUS-pretreated CNCs exhibited some special spherical fibers. TEMPO oxidation showed an enhancement effect on the characteristics of AUS/T-CNC and DES/T-CNC; DES/T-CNC exhibited higher stability and apparent viscosity than AUS/T-CNC. The DES/T-CNC-based cryogel displayed a higher adsorption capacity for anthocyanin (0.40 g/g) and curcumin (1.09 g/g) with good controlled release capacity. These results indicated that green solvent pretreatment-assisted TEMPO oxidation is a new environmentally friendly and low-cost method for the preparation of CNCs and shows excellent potential in the field of drug loading and controlled release.
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Affiliation(s)
- Lu Tang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bo Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shiru Bai
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bei Fan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Liang Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Fengzhong Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Pirozzi A, Rincón E, Espinosa E, Donsì F, Serrano L. Nanostructured Cellulose-Based Aerogels: Influence of Chemical/Mechanical Cascade Processes on Quality Index for Benchmarking Dye Pollutant Adsorbents in Wastewater Treatment. Gels 2023; 9:958. [PMID: 38131944 PMCID: PMC10742814 DOI: 10.3390/gels9120958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
(1) Background: Nanostructured cellulose has emerged as an efficient bio-adsorbent aerogel material, offering biocompatibility and renewable sourcing advantages. This study focuses on isolating (ligno)cellulose nanofibers ((L)CNFs) from barley straw and producing aerogels to develop sustainable and highly efficient decontamination systems. (2) Methods: (Ligno)cellulose pulp has been isolated from barley straw through a pulping process, and was subsequently deconstructed into nanofibers employing various pre-treatment methods (TEMPO-mediated oxidation process or PFI beater mechanical treatment) followed by the high-pressure homogenization (HPH) process. (3) Results: The aerogels made by (L)CNFs, with a higher crystallinity degree, larger aspect ratio, lower shrinkage rate, and higher Young's modulus than cellulose aerogels, successfully adsorb and remove organic dye pollutants from wastewater. (L)CNF-based aerogels, with a quality index (determined using four characterization parameters) above 70%, exhibited outstanding contaminant removal capacity over 80%. The high specific surface area of nanocellulose isolated using the TEMPO oxidation process significantly enhanced the affinity and interactions between hydroxyl and carboxyl groups of nanofibers and cationic groups of contaminants. The efficacy in adsorbing cationic dyes in wastewater onto the aerogels was verified by the Langmuir adsorption isotherm model. (4) Conclusions: This study offers insights into designing and applying advanced (L)CNF-based aerogels as efficient wastewater decontamination and environmental remediation platforms.
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Affiliation(s)
- Annachiara Pirozzi
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;
| | - Esther Rincón
- BioPrEn Group (RNM 940), Chemical Engineering Department, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Faculty of Science, Universidad de Córdoba, 14014 Córdoba, Spain; (E.R.); (E.E.)
| | - Eduardo Espinosa
- BioPrEn Group (RNM 940), Chemical Engineering Department, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Faculty of Science, Universidad de Córdoba, 14014 Córdoba, Spain; (E.R.); (E.E.)
| | - Francesco Donsì
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;
| | - Luis Serrano
- BioPrEn Group (RNM 940), Chemical Engineering Department, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Faculty of Science, Universidad de Córdoba, 14014 Córdoba, Spain; (E.R.); (E.E.)
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Giraldo Isaza L, Mortha G, Marlin N, Molton F, Duboc C. ClO 2-Mediated Oxidation of the TEMPO Radical: Fundamental Considerations of the Catalytic System for the Oxidation of Cellulose Fibers. Molecules 2023; 28:6631. [PMID: 37764407 PMCID: PMC10535468 DOI: 10.3390/molecules28186631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
The reaction mechanism of ClO2-mediated TEMPO oxidation was investigated by EPR spectroscopy and UV-Vis spectroscopy in the context of an alternative TEMPO sequence for cellulose fiber oxidation. Without the presence of a cellulosic substrate, a reversibility between TEMPO and its oxidation product, TEMPO+, was displayed, with an effect of the pH and reagent molar ratios. The involvement of HOCl and Cl-, formed as byproducts in the oxidation mechanism, was also evidenced. Trapping HOCl partly inhibits the reaction, whereas adding methylglucoside, a cellulose model compound, inhibits the reversibility of the reaction to TEMPO.
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Affiliation(s)
- Laura Giraldo Isaza
- Institute of Engineering, University Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Gérard Mortha
- Institute of Engineering, University Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Nathalie Marlin
- Institute of Engineering, University Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
| | - Florian Molton
- Department of Molecular Chemistry, University Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
| | - Carole Duboc
- Department of Molecular Chemistry, University Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
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Onyianta AJ, Xu G, Etale A, Eloi JC, Eichhorn SJ. Tackling the challenge of drying and redispersion of cellulose nanofibrils via membrane-facilitated liquid phase exchange. Carbohydr Polym 2023; 314:120943. [PMID: 37173032 DOI: 10.1016/j.carbpol.2023.120943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/31/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023]
Abstract
It is generally acknowledged that to advance the application of cellulose nanofibrils (CNFs) in product formulations, challenges associated with the drying and redispersion of this material must be addressed. Despite increased research efforts in this area, these interventions still involve the use of additives or conventional drying technologies, which both have the capacity to drive up the cost of the final CNF powders. Herein, we prepared dried and redispersible CNF powders with varying surface functionalities without the use of additives nor conventional drying technologies. Rapid drying in air was achieved after liquid phase exchange from water to isopropyl alcohol. The surface properties, morphology and thermal stabilities were the same for the never-dried and redispersed forms. The rheological properties of the CNFs were also unaffected after drying and redispersion of unmodified and organic acid modified materials. However, for 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-mediated oxidised CNFs with higher surface charge and longer fibrils, the storage modulus could not be recovered to the never-dried state because of the possible non-selective reduction in length upon redispersion. Nevertheless, this method provides an effective and low-cost process for the drying and redispersion of unmodified and surface modified CNFs.
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Affiliation(s)
- Amaka J Onyianta
- Bristol Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol BS8 1TR, UK.
| | - Guofan Xu
- Bristol Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol BS8 1TR, UK
| | - Anita Etale
- Bristol Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol BS8 1TR, UK
| | | | - Stephen J Eichhorn
- Bristol Composites Institute, School of Civil, Aerospace and Mechanical Engineering, University of Bristol, University Walk, Bristol BS8 1TR, UK
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Wu C, McClements DJ, He M, Li Y, Teng F. The measurement of molecular interactions, structure and physical properties of okara cellulose composite hydrogels using different analytical methods. J Sci Food Agric 2022; 102:4162-4170. [PMID: 35018651 DOI: 10.1002/jsfa.11765] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/12/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Aiming to address the practical problems of a low utilization rate and the serious waste of soybean residue, novel composite hydrogels based on okara cellulose before and after 2,2,6,6-tetramethylpiperidine oxide (TEMPO) oxidation and high polymers of chitosan (CH), carrageenan (CA) or Arabic gum (AG) were prepared by a homogeneous mixture in ionic liquid. RESULTS In the present study, composite hydrogels fabricated from okara cellulose and CH, CA or AG were prepared by dissolving them in an ionic liquid, followed by heating (100 °C, 3 h) and then soaking them in a 1:1 water-isopropanol solution. The composite hydrogels prepared from TEMPO oxidation-treated cellulose were physically cross-linked to CH, CA or AG. The results showed that the intramolecular hydrogen bonds in the amorphous regions of the cellulose were disrupted, whereas the intermolecular hydrogen bonds between the biopolymers were increased, which promoted the formation of composite gels with crystalline structures. The TEMPO treatment increased the gel strength. For example, for the cellulose/CA gels, the hardness, fracturability, springiness and cohesiveness values were 5.9-, 4.3-, 2.4- and 3.6-fold higher compared to the non-treated ones, respectively. The composite hydrogels exhibited good thermal stability, swelling properties and mechanical properties. These novel composite polysaccharide-based hydrogels may therefore have great potential in various food and non-food fields. CONCLUSION In summary, the addition of polymers (CH, CA or AG) and TEMPO oxidized cellulose was suitable for increasing the swelling, textural properties, thermal stability and rheological properties of hydrogels, which provides new ideas and new methods for the preparation of bio-based composite hydrogels. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Changling Wu
- Department of Food Science, Northeast Agricultural University, Harbin, China
| | | | - Mingyu He
- Department of Food Science, Northeast Agricultural University, Harbin, China
| | - Yang Li
- Department of Food Science, Northeast Agricultural University, Harbin, China
- National Soybean Engineering Technology Research Center, Harbin, China
- Heilongjiang Academy of Green Food Science, Harbin, China
| | - Fei Teng
- Department of Food Science, Northeast Agricultural University, Harbin, China
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Xiao WD, Xiao LP, Xiao WZ, Liu K, Zhang Y, Zhang HY, Sun RC. Cellulose-based bio-adsorbent from TEMPO-oxidized natural loofah for effective removal of Pb(II) and methylene blue. Int J Biol Macromol 2022; 218:285-94. [PMID: 35870625 DOI: 10.1016/j.ijbiomac.2022.07.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/13/2022] [Accepted: 07/17/2022] [Indexed: 11/22/2022]
Abstract
Excessive discharge of inorganic and organic contaminants in water poses a serious threat to the ecosystems. However, most synthetic adsorbents lack cost-effectiveness in terms of preparation. Interestingly, loofah sponge (LS) was a natural absorbent that could effectively remove pollutions in wastewater, but its adsorption capacity is barely satisfactory. Herein, we present a novel strategy of TEMPO-oxidized loofah sponge (TOLS) to boost the adsorption performance of LS. The batch experiments demonstrated that the maximum removal capacity of TOLS for Pb(II) and methylene blue (MB) was 96.6 mg/g and 10.0 mg/g, respectively, which were 3.5 and 1.3 times that of pristine LS. Notably, the continuous-flow reaction testing of the mixed solution revealed that the elimination rate of Pb(II) and MB was still better than 90 % even after 16 h. Such excellent performance was benefit from the enhanced specific surface area and surface carboxyl content of TOLS. This work offers new insights into the rational development of multifunctional and inexpensive cellulose-based bio-adsorbents for wastewater remediation.
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Xie F, De Wever P, Fardim P, Van den Mooter G. TEMPO-Oxidized Cellulose Beads as Potential pH-Responsive Carriers for Site-Specific Drug Delivery in the Gastrointestinal Tract. Molecules 2021; 26:molecules26041030. [PMID: 33672078 PMCID: PMC7919685 DOI: 10.3390/molecules26041030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/29/2021] [Accepted: 02/10/2021] [Indexed: 11/16/2022] Open
Abstract
The development of controlled drug delivery systems based on bio-renewable materials is an emerging strategy. In this work, a controlled drug delivery system based on mesoporous oxidized cellulose beads (OCBs) was successfully developed by a facile and green method. The introduction of the carboxyl groups mediated by the TEMPO(2,2,6,6-tetramethylpiperidine-1-oxyradical)/NaClO/NaClO2 system presents the pH-responsive ability to cellulose beads, which can retain the drug in beads at pH = 1.2 and release at pH = 7.0. The release rate can be controlled by simply adjusting the degree of oxidation to achieve drug release at different locations and periods. A higher degree of oxidation corresponds to a faster release rate, which is attributed to a higher degree of re-swelling and higher hydrophilicity of OCBs. The zero-order release kinetics of the model drugs from the OCBs suggested a constant drug release rate, which is conducive to maintaining blood drug concentration, reducing side effects and administration frequency. At the same time, the effects of different model drugs and different drug-loading solvents on the release behavior and the physical state of the drugs loaded in the beads were studied. In summary, the pH-responsive oxidized cellulose beads with good biocompatibility, low cost, and adjustable release rate have shown great potential in the field of controlled drug release.
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Affiliation(s)
- Fan Xie
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium;
| | - Pieter De Wever
- Bio & Chemical Systems Technology, Reactor Engineering and Safety, Department of Chemical Engineering, KU Leuven, 3000 Leuven, Belgium; (P.D.W.); (P.F.)
| | - Pedro Fardim
- Bio & Chemical Systems Technology, Reactor Engineering and Safety, Department of Chemical Engineering, KU Leuven, 3000 Leuven, Belgium; (P.D.W.); (P.F.)
| | - Guy Van den Mooter
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium;
- Correspondence: ; Tel.: +32-16-330-304
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Asgarpour Khansary M, Pouresmaeel-Selakjani P, Aroon MA, Hallajisani A, Cookman J, Shirazian S. A molecular scale analysis of TEMPO-oxidation of native cellulose molecules. Heliyon 2020; 6:e05776. [PMID: 33426323 PMCID: PMC7779718 DOI: 10.1016/j.heliyon.2020.e05776] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/27/2020] [Accepted: 12/15/2020] [Indexed: 11/25/2022] Open
Abstract
The native cellulose, through TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation, can be converted into individual fibers. It has been observed that oxidized fibers disperse completely and individually in water. It is believed that electrostatic repulsive forces might be responsible for such observations. In order to study the TEMPO-oxidation of cellulose molecules, we used Density Functional Theory (DFT) calculations and Flory-Huggins theory combined with molecular dynamics (MD). The surface electrostatic potential in native cellulose and TEMPO-oxidized cellulose were calculated using DFT calculations. We found that TEMPO-oxidized cellulose accommodates a threefold screw conformation where the negatively charged (–COO–) functional groups are pointed away from the surface in all spatial directions. This spatial orientation causes that TEMPO-oxidized cellulose molecules repulse each other due to strong negatively charged surface. At the same time, the spatial orientation increases the hydrophilicity in TEMPO-oxidized cellulose molecules. These observations explain the improved dispersion in water and separability of TEMPO-oxidized cellulose molecules. We obtained large and positive Flory–Huggins interaction parameters for TEMPO-oxidized cellulose molecules indicating their higher dispersion once in water.
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Affiliation(s)
- Milad Asgarpour Khansary
- Confirm Smart Manufacturing Center, Bernal Institute, University of Limerick, Limerick, Ireland.,Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
| | | | - Mohammad Ali Aroon
- Membrane Research Laboratory, Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran , Iran
| | - Ahmad Hallajisani
- Biofuel Research Laboratory, Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran , Iran
| | | | - Saeed Shirazian
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
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Revin VV, Nazarova NB, Tsareva EE, Liyaskina EV, Revin VD, Pestov NA. Production of Bacterial Cellulose Aerogels With Improved Physico-Mechanical Properties and Antibacterial Effect. Front Bioeng Biotechnol 2020; 8:603407. [PMID: 33344435 PMCID: PMC7738610 DOI: 10.3389/fbioe.2020.603407] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 11/13/2020] [Indexed: 12/13/2022] Open
Abstract
Aerogels have gained significant interest in recent decades because of their unique properties such as high porosity, low density, high surface area, and excellent heat and noise insulation. However, their high cost and low mechanical strength limit their practical application. We developed appropriate conditions to produce aerogels with controlled density, high mechanical strength, and thermal characteristics from bacterial cellulose (BC) synthesized by the strain Komagataeibacter sucrofermentans H-110. Aerogels produced using TEMPO oxidized BC (OBC) exhibited high mechanical strength and lower shrinkage than those from native bacterial cellulose (NBC). Compared to the NBC, the use of TEMPO-oxidized BC with oxidation degrees (OD) of 1.44 and 3.04% led to the reduction of shrinkage of the aerogels from 41.02 to 17.08%. The strength of the aerogel produced from the TEMPO-oxidized BC with an oxidation degree of 1.44% was twice that of the aerogel produced from NBC. The addition of Mg2+ at concentrations of 20 and 40 mM during the preparation of the aerogels increased the strength of the aerogels by 4.9 times. The combined use of TEMPO-oxidized BC and Mg2+ allowed pore size reduction from 1,375 to 197.4 μm on the outer part of the aerogels, thereby decreasing the thermal conductivity coefficient from 0.036 to 0.0176 W/(m•K). Furthermore, novel biocomposites prepared from the aerogels based on NBC and OBC and sodium fusidate, which have high antibiotic activity against Staphylococcus aureus, were obtained. Owing to their antibacterial properties, these aerogels can be used as functional biomaterials in a wide range of applications such as in tissue engineering and fabrication of wound dressing materials.
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Affiliation(s)
- Viktor V Revin
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Natalia B Nazarova
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Ekaterina E Tsareva
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Elena V Liyaskina
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Vadim D Revin
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
| | - Nikolay A Pestov
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, Saransk, Russia
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Xiao G, Montgomery JRD, Lancefield CS, Panovic I, Westwood NJ. Copper-Mediated Conversion of Complex Ethers to Esters: Enabling Biopolymer Depolymerisation under Mild Conditions. Chemistry 2020; 26:12397-12402. [PMID: 32378750 PMCID: PMC7589252 DOI: 10.1002/chem.202000088] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/27/2020] [Indexed: 11/06/2022]
Abstract
Selective processing of the β-O-4 unit in lignin is essential for the efficient depolymerisation of this biopolymer and therefore its successful integration into a biorefinery set-up. An approach is described in which this unit is modified to incorporate a carboxylic ester with the goal of enabling the use of mild depolymerisation conditions. Inspired by preliminary results using a Cu/TEMPO/O2 system, a protocol was developed that gave the desired β-O-4-containing ester in high yield using certain dimeric model compounds. The optimised reaction conditions were then applied to an oligomeric lignin model system. Extensive 2D NMR analysis demonstrated that analogous chemistry could be achieved with the oligomeric substrate. Mild depolymerisation of the ester-containing oligomer delivered the expected aryl acid monomer.
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Affiliation(s)
- Ganyuan Xiao
- School of Chemistry and Biomedical Sciences Research ComplexUniversity of St Andrews and EaStChemNorth HaughSt AndrewsFifeKY16 9STUK
| | - James R. D. Montgomery
- School of Chemistry and Biomedical Sciences Research ComplexUniversity of St Andrews and EaStChemNorth HaughSt AndrewsFifeKY16 9STUK
| | - Christopher S. Lancefield
- School of Chemistry and Biomedical Sciences Research ComplexUniversity of St Andrews and EaStChemNorth HaughSt AndrewsFifeKY16 9STUK
| | - Isabella Panovic
- School of Chemistry and Biomedical Sciences Research ComplexUniversity of St Andrews and EaStChemNorth HaughSt AndrewsFifeKY16 9STUK
| | - Nicholas J. Westwood
- School of Chemistry and Biomedical Sciences Research ComplexUniversity of St Andrews and EaStChemNorth HaughSt AndrewsFifeKY16 9STUK
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15
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Salama A, Abou-Zeid RE, Cruz-Maya I, Guarino V. Soy protein hydrolysate grafted cellulose nanofibrils with bioactive signals for bone repair and regeneration. Carbohydr Polym 2020; 229:115472. [PMID: 31826419 DOI: 10.1016/j.carbpol.2019.115472] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/29/2019] [Accepted: 10/13/2019] [Indexed: 01/10/2023]
Abstract
TEMPO oxidized cellulose nanofibers (T-CNF) were prepared from cellulose pulp which is extracted from bagasse. Soy protein hydrolysate (SPH) was grafted on T-CNF via amidation of carboxylic groups. Biomineralization was, then, assessed via calcium phosphates (CaP) precipitation in twice-simulated body fluid until formation of a new bioactive material. Protein was efficiently grafted without alteration of morphology and nanofibrils packing as reported by Fourier Transform infrared analysis /X Ray Diffraction /Scanning and Transmission Electron Microscopy / Atomic Force Microscopy. Highly crystalline calcium phosphate deposits - ca. 22.1% - were detected, with a Ca/P ratio equal to 1.63, in agreement with native bone apatite composition. In vitro response of human Mesenchymal Stem Cells confirmed the biocompatibility. No significant differences in terms of cell adhesion were recognized while a significant increase in cell proliferation was detected until 7 days. The presence of calcium phosphates tends to cover the nanofibrillar pattern, inducing the inhibition of cell proliferation and promoting the ex-novo precipitation of mineral phases. All the results suggest a promising use of these biomaterials in the repair and/or the regeneration of hard tissues such as bone.
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Affiliation(s)
- Ahmed Salama
- Cellulose and Paper Department, National Research Center, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt.
| | - Ragab E Abou-Zeid
- Cellulose and Paper Department, National Research Center, 33 El-Bohouth St., Dokki, P.O. 12622, Giza, Egypt
| | - Iriczalli Cruz-Maya
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, Naples, Italy; Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy
| | - Vincenzo Guarino
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, Mostra d'Oltremare, Pad.20, Naples, Italy.
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16
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Korica M, Peršin Z, Trifunović S, Mihajlovski K, Nikolić T, Maletić S, Fras Zemljič L, Kostić MM. Influence of Different Pretreatments on the Antibacterial Properties of Chitosan Functionalized Viscose Fabric: TEMPO Oxidation and Coating with TEMPO Oxidized Cellulose Nanofibrils. Materials (Basel) 2019; 12:E3144. [PMID: 31561509 DOI: 10.3390/ma12193144] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/12/2019] [Accepted: 09/24/2019] [Indexed: 11/17/2022]
Abstract
The main objective of this study was to obtain chitosan functionalized viscose fabric with improved antibacterial properties and washing durability. In this regard carboxyl and aldehyde groups, as binding points for irreversible chitosan attachment into/onto viscose fabric, were introduced by two different pretreatments: 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) oxidation and coating with TEMPO oxidized cellulose nanofibrils (TOCN). The Fourier transform infrared spectroscopy, elemental analysis, zeta potential measurements, scanning electron microscopy, breaking strength and antibacterial testing were used to evaluate the influence of these pretreatments on chitosan binding, but also on chemical, electrokinetic, morphological, mechanical and antibacterial properties of pretreated and chitosan functionalized viscose fabrics. Washing durability of chitosan functionalized viscose was monitored through changes in the chitosan content, electrokinetic and antibacterial properties after multiple washing. TOCN coating improves mechanical properties of fabric, while TEMPO oxidation deteriorates them. The results show that both pretreatments improve chitosan adsorption and thus antibacterial properties, which are highly durable to washing. After five washings, the chitosan functionalized pretreated viscose fabrics preserve their antibacterial activity against Staphylococcus aureus, while antibacterial activity against Escherichia coli was lost. TOCN coated and chitosan functionalized viscose fabric is a high value-added product with simultaneously improved antibacterial and mechanical properties, which may find application as medical textiles.
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17
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Zheng D, Zhang Y, Guo Y, Yue J. Isolation and Characterization of Nanocellulose with a Novel Shape from Walnut ( Juglans Regia L.) Shell Agricultural Waste. Polymers (Basel) 2019; 11:E1130. [PMID: 31277229 PMCID: PMC6680793 DOI: 10.3390/polym11071130] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/21/2019] [Accepted: 06/24/2019] [Indexed: 01/21/2023] Open
Abstract
Herein, walnut shell (WS) was utilized as the raw material for the production of purified cellulose. The production technique involves multiple treatments, including alkaline treatment and bleaching. Furthermore, two nanocellulose materials were derived from WS by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation and sulfuric acid hydrolysis, demonstrating the broad applicability and value of walnuts. The micromorphologies, crystalline structures, chemical functional groups, and thermal stabilities of the nanocellulose obtained via TEMPO oxidation and sulfuric acid hydrolysis (TNC and SNC, respectively) were comprehensively characterized. The TNC exhibited an irregular block structure, whereas the SNC was rectangular in shape, with a length of 55-82 nm and a width of 49-81 nm. These observations are expected to provide insight into the potential of utilizing WSs as the raw material for preparing nanocellulose, which could address the problems of the low-valued utilization of walnuts and pollution because of unused WSs.
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Affiliation(s)
- Dingyuan Zheng
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Yangyang Zhang
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Yunfeng Guo
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Jinquan Yue
- College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China.
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18
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Jun SH, Park SG, Kang NG. One-Pot Method of Synthesizing TEMPO-Oxidized Bacterial Cellulose Nanofibers Using Immobilized TEMPO for Skincare Applications. Polymers (Basel) 2019; 11:polym11061044. [PMID: 31197111 PMCID: PMC6631351 DOI: 10.3390/polym11061044] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 02/05/2023] Open
Abstract
In the skincare field, water-dispersed bacterial cellulose nanofibers synthesized via an oxidation reaction using 2,2,6,6–tetramethyl–1–piperidine–N–oxy radical (TEMPO) as a catalyst are promising bio-based polymers for engineered green materials because of their unique properties when applied to the surface of the skin, such as a high tensile strength, high water-holding capacity, and ability to block harmful substances. However, the conventional method of synthesizing TEMPO-oxidized bacterial cellulose nanofibers (TOCNs) is difficult to scale due to limitations in the centrifuge equipment when treating large amounts of reactant. To address this, we propose a one-pot TOCN synthesis method involving TEMPO immobilized on silica beads that employs simple filtration instead of centrifugation after the oxidation reaction. A comparison of the structural and physical properties of the TOCNs obtained via the proposed and conventional methods found similar properties in each. Therefore, it is anticipated that due to its simplicity, efficiency, and ease of use, the proposed one-pot synthesis method will be employed in production scenarios to prepare production quantities of bio-based polymer nanofibers in various potential industrial applications in the fields of skincare and biomedical research.
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Affiliation(s)
- Seung-Hyun Jun
- LG Household and Health Care R&D Center, Seoul 100-859, Korea.
| | - Sun-Gyoo Park
- LG Household and Health Care R&D Center, Seoul 100-859, Korea.
| | - Nae-Gyu Kang
- LG Household and Health Care R&D Center, Seoul 100-859, Korea.
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Jiang J, Yu J, Liu L, Wang Z, Fan Y, Satio T, Isogai A. Preparation and Hydrogel Properties of pH-Sensitive Amphoteric Chitin Nanocrystals. J Agric Food Chem 2018; 66:11372-11379. [PMID: 30346166 DOI: 10.1021/acs.jafc.8b02899] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Different from single charged or uncharged nanocrystals, amphoteric chitin nanocrystals (A-ChNCs) with both amine and carboxylate groups prepared with 2,2,6,6-tetramethylpiperidine-1-oxy-radical (TEMPO)-mediated oxidation and partial deacetylation were individually nanodispersed by sonicating in water at pH 3 and pH 11. The effects of the amount of NaClO2 added in TEMPO-oxidation, deacetylation time, and sequence of the two treatments on the weight recovery ratios of the A-ChNCs were investigated. The A-ChNCs prepared under optimum conditions had an average length of ∼544 nm and an average width of ∼10 nm. The A-ChNCs nanodispersed in water at pH 3 and pH 11 had absolute ζ-potentials of >30 mV; however, in neutral water, they formed aggregations, which were nanodispersed again when pH was adjusted to 3 or 11, showing pH sensitivity. Hydrogels of A-ChNC were prepared by adding saturated NaCl solution and adsorbed both anionic and cationic dyes. Freeze-dried A-ChNC aerogels had three-dimensional network structures containing abundant pores.
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Affiliation(s)
- Jie Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Juan Yu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Liang Liu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Zhiguo Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Yimin Fan
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Tsuguyuki Satio
- Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo 113-8657 , Japan
| | - Akira Isogai
- Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo 113-8657 , Japan
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20
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Weishaupt R, Heuberger L, Siqueira G, Gutt B, Zimmermann T, Maniura-Weber K, Salentinig S, Faccio G. Enhanced Antimicrobial Activity and Structural Transitions of a Nanofibrillated Cellulose-Nisin Biocomposite Suspension. ACS Appl Mater Interfaces 2018; 10:20170-20181. [PMID: 29767501 DOI: 10.1021/acsami.8b04470] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Resistance to antibiotics has posed a high demand for novel strategies to fight bacterial infections. Antimicrobial peptides (AMPs) are a promising alternative to conventional antibiotics. However, their poor solubility in water and sensitivity to degradation has limited their application. Here, we report the design of a smart, pH-responsive antimicrobial nanobiocomposite material based on the AMP nisin and 2,2,6,6-tetramethyl-1-piperidinyloxyl-oxidized nanofibrillated cellulose (TONFC). Morphological transformations of the nanoscale structure of nisin functionalized-TONFC fibrils were discovered at pH values between 5.8 and 8.0 using small-angle X-ray scattering. Complementary ζ potential measurements indicate that electrostatic attractions between the negatively charged TONFC surface and the positively charged nisin molecules are responsible for the integration of nisin. Modification of the pH level or increasing the ionic strength reduces the nisin binding capacity of TONFC. Biological evaluation studies using a bioluminescence-based reporter strain of Bacillus subtilis and a clinically relevant strain of Staphylococcus aureus indicated a significantly higher antimicrobial activity of the TONFC-nisin biocomposite compared to the pure nisin against both strains under physiological pH and ionic strength conditions. The in-depth characterization of this new class of antimicrobial biocomposite material based on nanocellulose and nisin may guide the rational design of sustainable antimicrobial materials.
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Affiliation(s)
- Ramon Weishaupt
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
| | - Lukas Heuberger
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
| | - Gilberto Siqueira
- Laboratory for Applied Wood Materials , Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Beatrice Gutt
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
| | - Tanja Zimmermann
- Laboratory for Applied Wood Materials , Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Katharina Maniura-Weber
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
| | - Stefan Salentinig
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
| | - Greta Faccio
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , CH-9014 St. Gallen , Switzerland
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21
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Serra A, González I, Oliver-Ortega H, Tarrès Q, Delgado-Aguilar M, Mutjé P. Reducing the Amount of Catalyst in TEMPO-Oxidized Cellulose Nanofibers: Effect on Properties and Cost. Polymers (Basel) 2017; 9:E557. [PMID: 30965860 PMCID: PMC6418795 DOI: 10.3390/polym9110557] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 10/13/2017] [Accepted: 10/24/2017] [Indexed: 11/19/2022] Open
Abstract
Cellulose nanofibers (CNF) are interesting biopolymers that find numerous applications in different scientific and technological fields. However, manufacturing costs are still one of the main drawbacks for the industrial production of highly fibrillated, transparent CNF suspensions. In the present study, cellulose nanofibers were produced from bleached eucalyptus pulp via TEMPO-mediated oxidation with varying amounts of NaClO and passed through a high-pressure homogenizer. The CNFs were chemically and physically characterized; cellulose nanopapers were also produced to study tensile properties. Production costs were also calculated. Results indicated that CNF properties are strongly dependent on the carboxyl content. Manufacturing costs showed that chemicals, in particular TEMPO catalyst, represent a large part of the final cost of CNFs. In order to solve this problem, a set of samples were prepared where the amount of TEMPO was gradually reduced. Characterization of samples prepared in this way showed that not only were the costs reduced, but also that the final properties of the CNFs were not significantly affected when the amount of TEMPO was reduced to half.
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Affiliation(s)
- Albert Serra
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
| | - Israel González
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
| | - Helena Oliver-Ortega
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
| | - Quim Tarrès
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
| | - Marc Delgado-Aguilar
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
| | - Pere Mutjé
- Group LEPAMAP, Department of Chemical Engineering, University of Girona, c/M. Aurèlia Campmany, n° 61, Girona 17071, Spain.
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22
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Deng X, Korogiannaki M, Rastegari B, Zhang J, Chen M, Fu Q, Sheardown H, Filipe CDM, Hoare T. "Click" Chemistry-Tethered Hyaluronic Acid-Based Contact Lens Coatings Improve Lens Wettability and Lower Protein Adsorption. ACS Appl Mater Interfaces 2016; 8:22064-22073. [PMID: 27509015 DOI: 10.1021/acsami.6b07433] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Improving the wettability of and reducing the protein adsorption to contact lenses may be beneficial for improving wearer comfort. Herein, we describe a simple "click" chemistry approach to surface functionalize poly(2-hydroxyethyl methacrylate) (pHEMA)-based contact lenses with hyaluronic acid (HA), a carbohydrate naturally contributing to the wettability of the native tear film. A two-step preparation technique consisting of laccase/TEMPO-mediated oxidation followed by covalent grafting of hydrazide-functionalized HA via simple immersion resulted in a model lens surface that is significantly more wettable, more water retentive, and less protein binding than unmodified pHEMA while maintaining the favorable transparency, refractive, and mechanical properties of a native lens. The dipping/coating method we developed to covalently tether the HA wetting agent is simple, readily scalable, and a highly efficient route for contact lens modification.
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Affiliation(s)
- Xudong Deng
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Myrto Korogiannaki
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Banafsheh Rastegari
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
- Department of Biology, Faculty of Sciences, Shiraz University , Shiraz, Fars 71946-84636, Iran
| | - Jianfeng Zhang
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Mengsu Chen
- School of Nursing, McMaster University , Hamilton, Ontario L8S 4L8, Canada
| | - Qiang Fu
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Heather Sheardown
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Carlos D M Filipe
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
| | - Todd Hoare
- Department of Chemical Engineering, McMaster University , Hamilton, Ontario L8S 4L7, Canada
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Jia Y, Zhai X, Fu W, Liu Y, Li F, Zhong C. Surfactant-free emulsions stabilized by tempo-oxidized bacterial cellulose. Carbohydr Polym 2016; 151:907-915. [PMID: 27474639 DOI: 10.1016/j.carbpol.2016.05.099] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 05/24/2016] [Accepted: 05/27/2016] [Indexed: 11/28/2022]
Abstract
In order to seek a safe, biodegradable, and sustainable solid stabilizer for food, topical and pharmaceutical emulsions, individualized cellulose nanofibers were prepared by oxidizing bacterial cellulose (BC) in a Tempo-mediated system; their ability to stabilize oil/water interface was investigated. Significant amounts of C6 carboxylate groups were selectively formed on each cellulose microfibril surface, so that the hydrophilicity was strengthened, leading to lower contact angles. Meanwhile, both the length and width of fibrils were decreased significantly, by partial cleavage of numerous numbers of inter- and intra-fibrillar hydrogen bonds. Tempo-oxidized BC (TOBC) was more effective than BC in stabilizing oil-water interface, attributing to the much smaller size. Fibril dosage and oxidation degree exerted a great influence on the stability and particle size distribution of emulsion samples. When the fibril dosage was 0.7wt.%, the sample was so stable that it did not experience creaming and coalescence over 8 months. The 2-TOBC coated droplets showed the greatest stability, although both the zeta potential and the electric repulsion were the largest for the 10-TOBC analogue, which was manipulated by the wettability of fibrils. In addition, the stability of samples was analyzed from the viewpoint of particle size distribution. Consequently, fibril size and wettability are two counterbalanced factors influencing the stability of TOBC-stabilized emulsions; a combination of suitable wettability and size imparts TOBC-stabilized emulsion high stability. As a kind of biomass-based particle stabilizer, TOBC showed great potential applications in food, topical and pharmaceutical formulations.
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Affiliation(s)
- Yuanyuan Jia
- Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin University of Science and Technology, TEDA, Tianjin 300457, PR China; College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, TEDA, Tianjin 300457, PR China.
| | - Xiaoli Zhai
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, TEDA, Tianjin 300457, PR China.
| | - Wei Fu
- Cargill Food (Tianjin) Co. LTD., 29 Huashan Road, Hangu Modern Industrial Park, TEDA, Tianjin, PR China.
| | - Yang Liu
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, TEDA, Tianjin 300457, PR China.
| | - Fei Li
- College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, TEDA, Tianjin 300457, PR China.
| | - Cheng Zhong
- Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin University of Science and Technology, TEDA, Tianjin 300457, PR China.
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Yagyu H, Saito T, Isogai A, Koga H, Nogi M. Chemical Modification of Cellulose Nanofibers for the Production of Highly Thermal Resistant and Optically Transparent Nanopaper for Paper Devices. ACS Appl Mater Interfaces 2015; 7:22012-7. [PMID: 26402324 DOI: 10.1021/acsami.5b06915] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Optically transparent cellulose nanopaper is one of the best candidate substrates for flexible electronics. Some types of cellulose nanopaper are made of mechanically or chemically modified cellulose nanofibers. Among these, nanopapers produced from chemically modified cellulose nanofibers are the most promising substrate because of their lower power consumption during fabrication and higher optical transparency (lower haze). However, because their thermal durability is as low as plastics, paper devices using chemically modified nanopaper often do not have sufficiently high performance. In this study, by decreasing the carboxylate content in the cellulose nanofibers, the thermal durability of chemically modified nanopaper was drastically improved while maintaining high optical transparency, low coefficient of thermal expansion, and low power consumption during fabrication. As a result, light-emitting diode lights illuminated on the chemically modified nanopaper via highly conductive lines, which were obtained by printing silver nanoparticle inks and high-temperature heating.
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Affiliation(s)
- Hitomi Yagyu
- The Institute of Scientific and Industrial Research, Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047 Japan
| | - Tsuguyuki Saito
- Graduate School of Agricultural and Life Sciences, The University of Tokyo , 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Akira Isogai
- Graduate School of Agricultural and Life Sciences, The University of Tokyo , 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Hirotaka Koga
- The Institute of Scientific and Industrial Research, Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047 Japan
| | - Masaya Nogi
- The Institute of Scientific and Industrial Research, Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047 Japan
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Gu J, Hsieh YL. Surface and structure characteristics, self-assembling, and solvent compatibility of holocellulose nanofibrils. ACS Appl Mater Interfaces 2015; 7:4192-4201. [PMID: 25635536 DOI: 10.1021/am5079489] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Rice straw holocellulose was TEMPO-oxidized and mechanically defibrillated to produce holocellulose nanofibrils (HCNFs) at 33.7% yield (based on original rice straw mass), 4.6% higher yield than cellulose nanofibril (CNF) generated by the same process from pure rice straw cellulose. HCNFs were similar in lateral dimensions (2.92 nm wide, 1.36 nm thick) as CNF, but longer, less surface oxidized (69 vs 85%), and negatively charged (0.80 vs 1.23 mmol/g). HCNFs also showed higher affinity to hydrophobic surfaces than CNFs while still attracted to hydrophilic surfaces. By omitting hemicellulose/silica dissolution step, the two-step 2:1 toluene/ethanol extraction and acidified NaClO2 (1.4%, pH 3-4, 70 °C, 6 h) delignification process for holocellulose was more streamlined than that of pure cellulose, while the resulting amphiphilic HCNFs were more hydrophobic and self-assembled into much finer nanofibers, presenting unique characteristics for new potential applications.
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Affiliation(s)
- Jin Gu
- Fiber and Poglymer Science, University of California , Davis, California 95616, United States
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26
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Budhadev D, Mukhopadhyay B. Chemical synthesis of a tetrasaccharide related to the exocellular polysaccharide from Rhodococcus sp. RHA1. Carbohydr Res 2014; 394:26-31. [PMID: 24960214 DOI: 10.1016/j.carres.2014.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 05/23/2014] [Accepted: 05/24/2014] [Indexed: 10/25/2022]
Abstract
Chemical synthesis of the tetrasaccharide related to the exocellular polysaccharide from Rhodococcus sp. RHA1 is reported. The stereoselective glycosylations were achieved by activation of the thioglycoside donors using N-iodosuccinimide in the presence of La(OTf)3 varying temperature per the need of 1,2-cis or 1,2-trans glycosylations. The target tetrasaccharide is reported in the form of its p-methoxyphenyl glycoside that can be cleaved selectively from the per-O-acetylated derivative allowing further glycoconjugate formation using trichloroacetimidate chemistry.
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Affiliation(s)
- Darshita Budhadev
- Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Balaram Mukhopadhyay
- Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India.
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27
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Pierre G, Salah R, Gardarin C, Traikia M, Petit E, Delort AM, Mameri N, Moulti-Mati F, Michaud P. Enzymatic degradation and bioactivity evaluation of C-6 oxidized chitosan. Int J Biol Macromol 2013; 60:383-92. [PMID: 23817103 DOI: 10.1016/j.ijbiomac.2013.06.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 06/20/2013] [Accepted: 06/22/2013] [Indexed: 11/30/2022]
Abstract
C-6 oxidized chitosan was produced from chitosan by performing selective oxidation with NaOCl and NaBr using 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) as catalyst. Endocellulase, Celluclast 1.5 L, Glucanex(®), Macerozyme R-10, hyaluronidase, hyaluronate lyase, red scorpionfish chitinase, glucuronan lyase and a protein mix from Trichoderma reesei were used to degrade the C-6 oxidized chitosan. Glucanex(®), the crude extract from T. reesei IHEM 4122 and Macerozyme R-10 validated the enzymatic degradation through final hydrolysis yields of the derivative respectively close to 36.4, 20.3 and 12.9% (w/w). The best initial reaction velocity (2.41 U/mL) was observed for Glucanex(®). The antileishmanial activity of the derivative was evaluated against Leishmania infantum LIPA 137. The antibacterial activities against Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853 were also tested. Results showed an antileishmanial activity (IC50: 125 μg/mL) of the obtained derivatives against L. infantum LIPA 137.
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Affiliation(s)
- Guillaume Pierre
- Clermont Université, Université Blaise Pascal, Institut Pascal, UMR 6602 CNRS Polytech' Clermont-Ferrand, 24 avenue des Landais, BP 206, Aubière Cedex F-63174, France.
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