TEMPO-mediated oxidation of polysaccharides: An ongoing story

Pierre, Guillaume; Punta, Carlo; Delattre, Cédric; Melone, Lucio; Dubessay, Pascal; Fiorati, Andrea; Pastori, Nadia; Galante, Yves M.; Michaud, Philippe

doi:10.1016/j.carbpol.2017.02.028

Cited by 136 publications

(95 citation statements)

References 135 publications

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“…Many scientific publications have explored the production of water-soluble chitouronic acid sodium (carboxylated chitin or CS) with the use of TEMPO, which is an organic catalyst used for the oxidation of hydroxyl functions into aldehyde ones in NaOCl and NaBr conditions [46][47][48][49]. TEMPO is mainly known for its use for regioselectively oxidizing primary hydroxyl groups of various polysaccharides.…”

Section: Oxy-chitosan Derivativesmentioning

confidence: 99%

“…In their work, Muzarelli et al [46] also used fungal biomass from Trichoderma and Aspergillus to produce a new range of carboxylated CS/chitin with a high degree of biocompatibility on human keratocytes, highlighting their potential use in drug delivery applications [51]. Pierre et al [49] have synthesized a new bioactive C6 oxy-CS derivative. This new derivative showed good anti-parasitic properties against Leishmania.…”

Section: Oxy-chitosan Derivativesmentioning

confidence: 99%

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Modification of Chitosan for the Generation of Functional Derivatives

et al. 2019

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Today, chitosan (CS) is probably considered as a biofunctional polysaccharide with the most notable growth and potential for applications in various fields. The progress in chitin chemistry and the need to replace additives and non-natural polymers with functional natural-based polymers have opened many new opportunities for CS and its derivatives. Thanks to the specific reactive groups of CS and easy chemical modifications, a wide range of physico-chemical and biological properties can be obtained from this ubiquitous polysaccharide that is composed of β-(1,4)-2-acetamido-2-deoxy-d-glucose repeating units. This review is presented to share insights into multiple native/modified CSs and chitooligosaccharides (COS) associated with their functional properties. An overview will be given on bioadhesive applications, antimicrobial activities, adsorption, and chelation in the wine industry, as well as developments in medical fields or biodegradability.

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Section: Oxy-chitosan Derivativesmentioning

confidence: 99%

Section: Oxy-chitosan Derivativesmentioning

confidence: 99%

Modification of Chitosan for the Generation of Functional Derivatives

et al. 2019

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“…In terms of the specific nanostructured materials based on cellulose, using nanostructured materials rather than nanosized solutions overcomes issues related to eco‐ and health‐safety. The synthetic strategy herein reported has two main advantages compared to standard adsorbent approaches (Corsi et al., ): (a) the production of fibers under mild conditions, according to a standard oxidation protocol (Pierre et al., ); (b) the promotion of efficient cross‐linking by thermal treatment.…”

Section: Discussionmentioning

confidence: 99%

Life cycle assessment of emerging environmental technologies in the early stage of development: A case study on nanostructured materials

Bartolozzi

Daddi

Punta

et al. 2019

J of Industrial Ecology

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The use of nanostructured materials has been recently proposed in the field of environmental nanoremediation. This approach consists in using nanomaterials not directly, but as building blocks for the design of nano-porous micro-dimensional systems, overcoming the eco-and healthtoxicology risks generally associated with the use of nano-sized technologies. Herein we report the use of life cycle assessment (LCA) as an eco-design tool for optimizing the production of cellulose nanosponges (CNS), nanostructured materials recently developed for water remediation purposes. LCA was applied from the acquisition of raw materials to the synthesis of CNS (from cradleto-gate), considering three production systems, from the lab-level to a modeled scale-up system.The lab-scale LCA identified the main environmental hotspots, namely the energy-consuming steps and the final purification of the material (washing step). In a second lab-scale production, an improvement action could be implemented, switching the washing solvent from methanol to water and decreasing the washing temperature. A second LCA showed a reduced contribution to the impacts from the materials, while the global impacts remained within the same order of magnitude. A simulated scale-up of the process allowed to optimize the energy-consuming steps and the water consumption, through internal recycling. A third LCA assessed the resulting benefits and a decrease in the global impacts by two orders of magnitude. Our study contributes to the discussion of LCA community, providing a focus on the importance of scaling-up of emerging technologies, namely nanostructured porous materials, highlighting the benefits of a LCA based approach since the very beginning of product design (eco-design). K E Y W O R D Scellulose nanosponges, eco-design, life cycle assessment, nanotechnologies, prospective LCA, scale-up

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“…Cellulose is a naturally occurring polymer of great interest in different research areas due to its abundance, availability, and low price. It is a polysaccharide comprised of β(1,4)‐linked D‐glucose units ,. Thus this biopolymer can be easily modified by manipulation of the carbinol functionalities to improve specific physical and/or chemical features of the raw unmodified cellulose.…”

Section: Introductionmentioning

confidence: 99%

“…Thus this biopolymer can be easily modified by manipulation of the carbinol functionalities to improve specific physical and/or chemical features of the raw unmodified cellulose. The material warrants special attention as a platform for environmental applications due to its natural abundance, biodegradability, and renewability . Cellulose can be obtained from several different sources, including wood, other plants, tunicates, algae, and bacteria .…”

Section: Introductionmentioning

confidence: 99%

Capture of Aldehyde VOCs Using a Series of Amine‐Functionalized Cellulose Nanocrystals

et al. 2018

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Aldehydes are commonly encountered VOCs released to the atmosphere from a variety of anthropogenic sources. We have previously reported the use of poly(ethyleneimine) (PEI) modified biodegradable poly(lactic acid) nanoparticles for the capture of volatile aldehydes and carboxylic acids in the gas phase. In this study we evaluated the performance of aminedecorated cellulose materials by grafting three stable aminebearing molecules (i. e. ethylendiamine (EDA), tris(2-aminoethyl) amine (Tris), and PEI) to the surface of cellulose micro and nanocrystals using a convenient two step protocol. The aminemodified cellulose materials were then characterized using TGA, FTIR, EDS, and elemental analysis. GC headspace experi-ments were conducted to assess the ability of the aminemodified cellulose materials to capture two illustrative aldehyde VOCs, hexanal and octanal, in the gas phase. PEI-cellulose nanocrystals successfully captured gaseous hexanal, and significantly outperformed related PEI-cellulose microcrystals. In a second round of optimization, cellulose nanocrystals modified with simpler amine-bearing molecules, Tris and EDA, were prepared for comparison. Tris and EDA modified cellulose nanocrystals also efficiently captured the target VOCs. These results demonstrate that the size of cellulose substrate and the chemical composition of the amine molecules on the surface are critical parameters for efficient contaminant capture.[a] Dr.

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TEMPO-mediated oxidation of polysaccharides: An ongoing story

Cited by 136 publications

References 135 publications

Modification of Chitosan for the Generation of Functional Derivatives

Modification of Chitosan for the Generation of Functional Derivatives

Life cycle assessment of emerging environmental technologies in the early stage of development: A case study on nanostructured materials

Capture of Aldehyde VOCs Using a Series of Amine‐Functionalized Cellulose Nanocrystals

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