Plasma-chemical destruction and modification of chitosan in solution

Титов, В. А.; Lipatova, I. M.; Mezina, E. A.; Kuz’micheva, L. A.

doi:10.1134/s0018143916050167

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…Moreover, cellulose can be utilized to produce "smart materials", including active electronic papers, sensors, shape-memory materials, and smart membranes [7]. Chitin and chitosan (product of the deacetylation of chitin), weight species [43][44][45]. These processes are mediated by the formation of radicals and can be applied for the fast and effective immobilization of chitosan onto polymeric supports for potential wound dressing applications [46,47].…”

Section: Introductionmentioning

confidence: 99%

Dual-Mode Solution Plasma Processing for the Production of Chitosan/Ag Composites with the Antibacterial Effect

et al. 2020

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The development of novel biocompatible and biodegradable materials for medical applications has been drawing significant interest in the scientific community for years. Particularly, chitosan loaded with silver nanoparticles (Ag NPs) has a strong antimicrobial potential and could be applied, for example, as wound dressing material. In this work, chitosan/Ag NP composites were produced utilizing a single-step plasma-solution process, which is simple and environmentally friendly. An acetic solution of chitosan containing AgNO3 was treated by the direct current (DC) atmospheric pressure glow discharge, with the liquid serving as either cathode or anode. The plasma-solution system with liquid anode is more useful for the production of Ag NPs. Nevertheless, the NP size is comparable for both cases. The plasma treatment with both polarities led to chitosan degradation. The cleavage of glucosidic chains mostly occurred in the system with the liquid cathode, whereas the side oxidation reactions took place when the solution served as the anode. The oxidation processes were possibly induced by the hydrogen peroxide H2O2 efficiently formed in the last case. The composite materials produced with both polarities of liquid electrode demonstrated the bactericidal action against Gram-negative Escherichia coli, Gram-positive Staphylococcus aureus, and Gram-positive Bacillus subtilis.

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Section: Introductionmentioning

confidence: 99%

Dual-Mode Solution Plasma Processing for the Production of Chitosan/Ag Composites with the Antibacterial Effect

et al. 2020

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“…As a consequence, chitosan forms stable complexes with almost all transition metal ions. [62] Nonetheless, raw chitosan displays some limitations for the remediation of wastewaters contaminated by heavy metals, such as poor selectivity, low adsorption capacity, short pH range, and rather low number of functional groups. Therefore, chitosan has often been chemically modified for application of heavy metal removal.…”

Section: Grégoriomentioning

confidence: 99%

“…These groups are arranged in a regular manner on the molecular chains of the chitosan matrix, thus forming cage molecules which can chelate compounds by hydrogen binding. As a consequence, chitosan forms stable complexes with almost all transition metal ions . Nonetheless, raw chitosan displays some limitations for the remediation of wastewaters contaminated by heavy metals, such as poor selectivity, low adsorption capacity, short pH range, and rather low number of functional groups.…”

Section: Physicochemical Properties Of Chitosanmentioning

confidence: 99%

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Zhang

Crini

Lichtfouse

et al. 2020

The Chemical Record

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Abatement of mercury emissions in air and waters has become a global challenge due to the toxicity of mercury species for life, yet actual remediation techniques are limited. In particular, adsorption of mercury ions onto solids is widely used but most adsorption techniques are not specific, and in turn, removal efficiency is lower. Adsorbents developed so far include activated carbon, clay, bentonite, cellulose and chitosan. Chitosan derivatives have recently attracted research attention for water purification because their molecular frames contain a large amount of À NH 2 and À OH groups that can chelate with metal ions specifically. This manuscript reviews recent advances in chitosan-based adsorbents designed to remove mercury ions from wastewater. Focus is placed on their design, synthesis, characterization, adsorption properties, adsorption mechanisms and applications.

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“…The second pathway that leads to the depolymerization is the interaction of polysaccharides chains with atomic oxygen that reacts fast with various carbonaceous materials [62]. The importance of atomic oxygen species compared to that of excited atomic or molecular nitrogen species was confirmed in studies of isolation of chitin biopolymer from waste crustacean biomass and chitosan degradation/gelation in the RF low-pressure discharge, atmospheric-pressure dielectric barrier discharge, and in the liquid-phase plasma systems [35,[62][63][64][65][66].…”

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confidence: 95%

Chitosan Plasma Chemical Processing in Beam-Plasma Reactors as a Way of Environmentally Friendly Phytostimulants Production

et al. 2021

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A novel technique of phytoactive water-soluble chitooligosaccharide (COS) production in low-temperature plasma is described. Design, operation, and control of plasma chemical reactors used to produce COS from the powder of high molecular weight chitosan are presented. The electron beam plasma is strongly non-equilibrium and chemically active; plasma was excited by injecting the scanning electron beam into reaction volume filled with aerosol, containing oxygen and chitosan powder. Plasma chemical processes, responsible for the raw chitosan destruction and techniques of these processes to obtain control of products of optimal molecular weight, are considered. COS, in amounts sufficient for laboratory tests with some plants, were produced. Tests showed that the addition of COS into the liquid growing medium at 0.25 and 1 mg/mL stimulates root growth in Arabidopsis thaliana seedlings (Col-0) by up to 40%, with respect to control plants. Foliar application of these COS formulations at 0.25 mg/mL on tomato plants (cv. Micro-Tom) also resulted in increases between 11.9% and 36% in two important plant productivity indicators (flower and fruit numbers) compared to the control plants. Being environmentally friendly (and resource saving) the electron beam plasma technology of renewable natural biopolymer processing can be considered as a competitive way to produce biostimulants for commercial agriculture.

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Plasma-chemical destruction and modification of chitosan in solution

Cited by 11 publications

References 19 publications

Dual-Mode Solution Plasma Processing for the Production of Chitosan/Ag Composites with the Antibacterial Effect

Dual-Mode Solution Plasma Processing for the Production of Chitosan/Ag Composites with the Antibacterial Effect

Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review

Chitosan Plasma Chemical Processing in Beam-Plasma Reactors as a Way of Environmentally Friendly Phytostimulants Production

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