Obtaining chitin, chitosan and their melanin complexes from insects

Khayrova, Adelya; Лопатин, С. А.; Варламов, В. П.

doi:10.1016/j.ijbiomac.2020.11.086

Cited by 66 publications

(32 citation statements)

References 84 publications

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“…Although these two processes are separate, they are believed to be closely related and occur simultaneously, with melanin likely to be a product of both processes [42,43]. Research to understand the interactions among of all these components in the exoskeleton of arthropods is currently ongoing; however, studies on chitin extraction from these sources suggest that melanin could covalently bind to chitin [44][45][46]. These assumptions are based on the inability to chemically remove all pigments, presumably melanin, from insect-extracted chitin [45,47].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Research to understand the interactions among of all these components in the exoskeleton of arthropods is currently ongoing; however, studies on chitin extraction from these sources suggest that melanin could covalently bind to chitin [44][45][46]. These assumptions are based on the inability to chemically remove all pigments, presumably melanin, from insect-extracted chitin [45,47]. One research group recently filed a patent, where extractable chitin from the black soldier fly, was chemically converted into chitosan with melanin still covalently bound [30,46].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Overall, CCF were more hydrophobic than commercial chitosan films, which we believe could be a result of residual melanin present. In one recent review on insect chitin, chitosan, and their melanin complexes, the authors highlight increased hydrophobicity of melanin-chitosan complexes due to the hydrophobic nature of melanin [45]. Additionally, a biomimetic chitosan film study attributed increased water contact angles due to the presence of melanin [44].…”

Section: Water Contact Anglesmentioning

confidence: 99%

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Development of Chitosan Films from Edible Crickets and Their Performance as a Bio-Based Food Packaging Material

et al. 2021

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Edible insects have gained attention due to their impressive nutritional composition, as well as their efficient use of natural resources. However, a research gap remains on the applications of insect chitosan, especially as it relates to their potential use as food packaging material. Chitosan from two reared cricket species (Acheta domesticus and Gryllodes sigillatus) was evaluated for use as food packaging material. Cricket chitosan films (CCF) were structurally similar to commercial shrimp chitosan films (SCF) at controlled glycerol levels, as seen by shared spectral peaks in FT-IR analyses. Mechanical properties of CCF showed they had equal or greater tensile strength when compared to commercial SCF, although flexibility was lower. Scanning electron microscopy showed increased roughness of microstructure, likely increasing the tortuosity. As a result, CCF had improved water vapor permeability compared to commercial SCF. Melanin complexes present in cricket chitin and chitosan increased hydrophobicity and decreased light transmittance. This study also revealed that intrinsic species differences, which occur during insect and crustacean exoskeleton development, could have effects on the functionality of chitosan packaging materials. Overall, CCF were found to be as effective as commercial SCF, while providing additional advantages. CCF derived from reared crickets have good mechanical and barrier properties, and improved water resistance and light barrier characteristics. Edible cricket chitosan has the potential to be used as bio-based packaging material for food and pharmaceutical applications.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Water Contact Anglesmentioning

confidence: 99%

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Development of Chitosan Films from Edible Crickets and Their Performance as a Bio-Based Food Packaging Material

et al. 2021

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“…Chitin is the second most abundant polysaccharide in the natural environment, after cellulose. It is a structural polymer of marine invertebrate shells, insect skeletons, and fungal cell walls [ 1 , 2 , 3 , 4 ]. It can be found in the structure of sponges and corals [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

The Kinetics of Chitosan Degradation in Organic Acid Solutions

2021

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This paper presents a comparative study on chitosan degradation in organic acid solutions according to their different dissociation characteristics. More precisely, the aim of the study was to determine the kinetics of the degradation process depending on the different acid dissociation constants (pKa values). The scientists involved in chitosan to date have focused mainly on acetic acid solutions. Solutions of lactic, acetic, malic, and formic acids in concentrations of 3% wt. were used in this research. The progress of degradation was determined based on the intrinsic viscosity measurement, GPC/SEC chromatographic analysis, and their correlation. Changes in the viscosity parameters were performed at a temperature of 20 °C ± 1 °C and a timeframe of up to 168 h (7 days). The chemical structure and DDA of the initial chitosan were analyzed using 1H-NMR spectroscopy analysis. The results of this study can be considered of high importance for the purpose of electrospinning, production of micro- and nano-capsules for drug delivery, and other types of processing. Understanding the influence of the dissociation constant of the solvent on the kinetics of chitosan degradation will allow the selection of an appropriate medium, ensuring an effective and stable spinning process, in which the occurrence of polymer degradation is unfavorable.

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“…FeS and Fe 3 O 4 nanoparticles are widely used because of their advantages of good infrared photothermal effect, low toxicity, biocompatibility, low cost, easy processing and hydrophilicity [15][16][17]. Chitin is a common natural polymer material, which has been applied in practice because of its wide source, environmental benignness, excellent chemical stability, biocompatibility, and low toxicity [18][19][20]. Chitin can be used as materials in the adsorbent, antibacterial, catalytic technology, Fenton reaction and other aspects of extensive research.…”

Section: Introductionmentioning

confidence: 99%

Iron Based Chitin Composite Films for Efficient Solar Seawater Desalination

Zhang

Xie

et al. 2021

Processes

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Seawater desalination provides a convenient method for the sustainable production of fresh water. However, the preparation of low-cost, high-efficiency solar absorbers remains a huge challenge. To this end, our research group designed and produced a cheap absorber—a membrane made of natural polymer chitin with black FeS and Fe3O4, respectively. Due to the hierarchical pore structure, excellent photothermal performance and good hydrophilicity of the film, their water evaporation rates reached 1.47 kg/m2/h and 1.55 kg/m2/h under one sunlight, respectively. Under about 10 suns, the highest desalination efficiency of FeS/chitin and Fe3O4/chitin are 90% and 74%, respectively, and their salinities are also in line with the World Health Organization drinking water standards. These results indicate the potential of chitin-based nanomaterials as high-efficiency solar absorbers to produce fresh water.

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Obtaining chitin, chitosan and their melanin complexes from insects

Cited by 66 publications

References 84 publications

Development of Chitosan Films from Edible Crickets and Their Performance as a Bio-Based Food Packaging Material

Development of Chitosan Films from Edible Crickets and Their Performance as a Bio-Based Food Packaging Material

The Kinetics of Chitosan Degradation in Organic Acid Solutions

Iron Based Chitin Composite Films for Efficient Solar Seawater Desalination

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