Plasticizing of chitosan films with deep eutectic mixture of malonic acid and choline chloride

Sokolova, Maria P.; Смирнов, М. А.; Samarov, Artemiy; Bobrova, N. V.; Vorobiov, Vitaly K.; Попова, Е. Н.; Филиппова, Е. А.; Geydt, Pavel; Lähderanta, E.; Тойкка, А. М.

doi:10.1016/j.carbpol.2018.06.037

Cited by 70 publications

(48 citation statements)

References 44 publications

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“…At the same time, some characteristic peaks of ChCl (at 1348 and 1139 cm −1 ) did not appear in the spectra of plasticized CS films. The disappearance of these ChCl peaks was observed in the FTIR study of DES malonic acid/ChCl [35]. Thus, it can be considered as an evidence for the formation of NADES inside the CS film.…”

Section: Fourier Transform Infrared Spectramentioning

confidence: 86%

“…CS (with a M w = 900,000) was purchased from "Bioprogress CJSC" (Schelkovo, Russia) and used without further purification. The degree of deacetylation, %DA = 68.2% [35].…”

Section: Methodsmentioning

confidence: 99%

“…Polymers 2020, 12, x FOR PEER REVIEW 6 of 19 malonic acid/ChCl [35]. Thus, it can be considered as an evidence for the formation of NADES inside the CS film.…”

Section: Fourier Transform Infrared Spectramentioning

confidence: 99%

“…The acetic acid solution (3%) was used for mixing of CS and NADES and hot-pressing was applied for formation of films. An additional benefit, which is especially important for polysaccharides is a plasticizing effect of DES [31,32], which gives potential for obtaining of thermoplastic and elastic materials based on starch [33] and chitosan [34,35]. These polymers in pure state cannot be processed via common methods of polymer industry like extrusion or thermo-compression molding.…”

Section: Introductionmentioning

confidence: 99%

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Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

et al. 2020

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The natural deep eutectic solvent (NADES) based on choline chloride (ChCl) and lactic acid (LA) was used for the preparation of chitosan (CS) films by the solution casting method. The content of NADES in films was from 0 to 82 wt%. The impact of NADES on the morphology and crystalline structure of films was investigated using scanning electron microscopy as well as wide-angle and small-angle X-ray scattering. The experimental results allow to propose CS chains swelling in NADES. FTIR spectroscopy confirms the interactions between CS and NADES components via the formation of hydrogen and ion bonds. The thermal properties of the composite films were studied by simultaneous thermogravimetric and differential thermal analysis. Thermomechanical analysis demonstrated appearance of two transitions at temperatures between −23 and −5 °C and 54–102 °C depending on NADES content. It was found that electrical conductivity of film with 82 wt% of NADES reaches 1.7 mS/cm. The influence of the composition and structure of films on the charge carriers concentration and their mobility is discussed.

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Section: Fourier Transform Infrared Spectramentioning

confidence: 86%

“…CS (with a M w = 900,000) was purchased from "Bioprogress CJSC" (Schelkovo, Russia) and used without further purification. The degree of deacetylation, %DA = 68.2% [35].…”

Section: Methodsmentioning

confidence: 99%

“…Polymers 2020, 12, x FOR PEER REVIEW 6 of 19 malonic acid/ChCl [35]. Thus, it can be considered as an evidence for the formation of NADES inside the CS film.…”

Section: Fourier Transform Infrared Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

et al. 2020

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“…Mechanical testing supported these investigations as the films showed an elastic state at room temperature. The maximum homogeneity of the films was observed between 50 and 75 wt% of added DES . Another DES, namely choline chloride/citric acid, increased the elongation of chitosan (DD = 76%) films.…”

Section: Chitin Biomassmentioning

confidence: 93%

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Müller

Zollfrank

Schmid

2019

Macro Materials & Eng

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With the objective of a more sustainable circular economy, one long‐term goal is the utilization of renewable resources as feedstock for the production of polymer‐based materials. In order to successfully process such materials using existing industrial‐scale technologies or even recycling processes, the natural polymers must have thermoplastic properties. With only a few exceptions, natural polymers are not thermoplastic. However, chemical and physical modification techniques are able to induce thermoplasticity in natural polymers from biomass resources such as cellulose, lignin, and chitin. Modification techniques focus on masking the hydroxyl groups to disrupt dense hydrogen bonding and so enable polymer chain mobility upon heating. The introduction of long alkyl chains into the polymer backbone effectively improves the thermoplastic processing of natural polymers. With regard to polymer blending, chemical grafting and graft copolymerization are powerful tools for enhancing compatibility. For both chemical and physical modification, solvents such as ionic liquids and deep eutectic solvents are currently being explored for biomass and fiber processing and show promise for the future development of thermoplastic biopolymers. This review describes possible modifications, potential processing difficulties, and gives a summary of relevant studies described in the scientific literature.

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Green Additives in Chitosan‐Based Bioplastic Films: Physical, Mechanical, and Chemical Properties

Schnabl,

Mandemaker,

Nierop

et al. 2023

ChemSusChem

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To switch to alternatives for fossil‐fuel‐based polymer materials, renewable raw materials from green resources should be utilized. Chitosan is such a material that is a strong, but workable derivative from chitin, obtained from crustaceans. However, various applications ask for specific plastic properties, such as certain flexibility, hardness and transparency. With different additives, also obtainable from green resources, chitosan‐based composites in the form of self‐supporting films, ranging from very hard and brittle to soft and flexible were successfully produced. The additives turn out to belong to one of three categories, namely linear, non‐linear, or crosslinking additives. The non‐linear additives could only be taken up to a certain relative amount, whereas the uptake of linear additives was not limited within the range of our experiments. Additives with multiple functional groups tend to crosslink chitosan even at room temperature in an acidic medium. Finally, it was shown that dissolving the chitosan in acetic acid and subsequently drying the matrix as a film results in reacetylation compared to the starting chitosan source, resulting in a harder material. With these findings, it is possible to tune the properties of chitosan‐based polymer materials, making a big step towards application of this renewable polymer within consumer goods.

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Plasticizing of chitosan films with deep eutectic mixture of malonic acid and choline chloride

Cited by 70 publications

References 44 publications

Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Green Additives in Chitosan‐Based Bioplastic Films: Physical, Mechanical, and Chemical Properties

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