Structure of β-chitin from Berryteuthis magister and its transformation during whisker preparation and polymerization filling

Богданова, О. И.; Polyakov, D. K.; Streltsov, D. R.; Bakirov, Artem V.; Blackwell, John; Чвалун, С. Н.

doi:10.1016/j.carbpol.2015.11.027

Cited by 16 publications

(7 citation statements)

References 40 publications

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“…Both A-ChNF and T-ChNF show the peak intensities at 2θ diffraction angles of 8.6 and 19.6°, respectively. The peaks correspond to those of the raw squid pen β-chitin published previously. , At the first peak intensity, 2θ = 8.6° diffraction angle corresponds to the Bragg reflection of the (010) planes. ,, At this angle, the β-chitin is in the monohydrated form . The second peak at 19.6° is from multiple crystal planes at (100) + (1–10) + (110) directions and is specific to the chitin crystal.…”

Section: Resultssupporting

confidence: 59%

“…31 One of the most intense peaks at 002 reflections presented in the literature is absent. 7,32 Based on the 002 peak extracted from the two detector−wide-angle X-ray scattering (2D-WAXS) pattern of α-chitin fibril film (hit from the edges), 19 we found that the 002 peak is weak because of the out-of-plane fibril orientation. Our current data show that the β-chitin crystal structure is preserved.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

“…16,31 At the first peak intensity, 2θ = 8.6°diffraction angle corresponds to the Bragg reflection of the (010) planes. 7,31,32 At this angle, the β-chitin is in the monohydrated form. 32 The second peak at 19.6°is from multiple crystal planes at (100) + (1−10) + (110) directions and is specific to the chitin crystal.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…7,31,32 At this angle, the β-chitin is in the monohydrated form. 32 The second peak at 19.6°is from multiple crystal planes at (100) + (1−10) + (110) directions and is specific to the chitin crystal. A powdered sample (squid pen β-chitin) with better intensity reflection instead of a film presents the peaks at 9°and 20°, corresponding to both a raw squid pen and nanofibrils.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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High-Strength Nanostructured Film Based on β-Chitin Nanofibrils from Squid Illex argentinus Pens by 2,2,6,6-Tetramethylpiperidin-1-yl Oxyl-Mediated Reaction

Engström

et al. 2021

ACS Sustainable Chem. Eng.

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2,2,6,6-Tetramethylpiperidin-1-yl oxyl (TEMPO)-oxidized β-chitin nanofibrils (T-ChNF) are novel nanofibrils of high strength and stiffness and can also enhance the adsorption of chitosan in materials for biomedical applications. This study presents the preparation, structure, and properties of T-ChNF based on squid pens. Our nanofibrils have a zeta potential of −25.3 mV at neutral pH and a carboxylic content of 0.17 mmol/g, making hydrocolloid suspension stable at alkaline and neutral pH. It was demonstrated that positively charged chitosan could be adsorbed on the negatively charged surface of T-ChNF, leading to charge neutralization. The key to strong squid pen T-ChNF is the initial raw squid chitin properties and the high degree of acetylation (DA = 99.9%). The T-ChNF diameter is ∼4.4 nm, and the length is in the micrometer range. The length and diameter are similar to those of squid pen β-chitin fibrils prepared under mild conditions. These qualities of fibrils resulted in high-strength (176 MPa) chitin films prepared using the rapid vacuum filtration and drying technique. T-ChNF-based films are ductile, flexible, and transparent.

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Section: Resultssupporting

confidence: 59%

Section: ■ Results and Discussionmentioning

confidence: 95%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

High-Strength Nanostructured Film Based on β-Chitin Nanofibrils from Squid Illex argentinus Pens by 2,2,6,6-Tetramethylpiperidin-1-yl Oxyl-Mediated Reaction

Engström

et al. 2021

ACS Sustainable Chem. Eng.

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“…Chitin is a linear macromolecular structural component found within the cell walls of various microorganisms (yeasts and molds) [6,7,8,9]), exoskeleton of insects [10,11,12] and crustaceans [13,14,15,16]), and internal shells of cephalopods [17,18,19,20]. It is one of the most abundant naturally derived polysaccharides formed by the β (1 → 4) linkage of N -acetyl-2-amino-2-deoxy- d -glucose and 2-amino-2-deoxy- d -glucose monomeric units, which specifically provide chitin with a rigid and semi-crystalline fiber-like structure that is insoluble in water and other common solvents [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Characterization, and Evaluation of Bionanocomposites Based on Natural Polymers and Antibiotics for Wound Healing Applications

et al. 2016

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Abstract:The aim of our research activity was to obtain a biocompatible nanostructured composite based on naturally derived biopolymers (chitin and sodium alginate) loaded with commercial antibiotics (either Cefuroxime or Cefepime) with dual functions, namely promoting wound healing and assuring the local delivery of the loaded antibiotic. Compositional, structural, and morphological evaluations were performed by using the thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and fourier transform infrared spectroscopy (FTIR) analytical techniques. In order to quantitatively and qualitatively evaluate the biocompatibility of the obtained composites, we performed the tetrazolium-salt (MTT) and agar diffusion in vitro assays on the L929 cell line. The evaluation of antimicrobial potential was evaluated by the viable cell count assay on strains belonging to two clinically relevant bacterial species (i.e., Escherichia coli and Staphylococcus aureus).

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Silylated Carbon Nanofiber/Polydimethylsiloxane Based Printable Electrorheological and Sensor Inks for Flexible Electronics

Bhattacharyya,

Haridas CP,

Kaushal

et al. 2024

Small Methods

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Electrorheological fluids (ERF) have garnered significant attention for their potential to provide actuation on demand. Similarly, developing stimuli‐responsive printable inks for flexible electronics is also gaining antecedence. However, developing a material that demonstrates both functionalities is far and few. Accordingly, a printable ink is made using silylated carbon nanofiber (SiCNF)‐polydimethylsiloxane (PDMS). The viscosity of the ink increased by 43%, when subjected to an electric field (E). Robust stability for 20 cycles under E = 300 V mm−1 is noted. The yield stress (τy) value increased by 1600% (E = 600 V mm−1) compared to zero‐field yield stress. Applying temperature with E further increased the τy. In the absence of E, applying temperature not only slowed down the relaxation modulus but also counterintuitively augmented the extent of sluggishness with an increase in temperature. A comprehensive study on the waiting time also indicated a structure build‐up within the ink composition happening as the waiting time increases. Accordingly, the time‐temperature and time‐waiting time superposition principle is applied to predict the long‐term behavior of the inks. Further, the printability index of the ink check is studied and used for printing designs using direct ink writing. The printed ink demonstrated pressure sensing capability with a sensitivity of 6.3%/kPa and is stable over 60 cycles.

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Structure of β-chitin from Berryteuthis magister and its transformation during whisker preparation and polymerization filling

Cited by 16 publications

References 40 publications

High-Strength Nanostructured Film Based on β-Chitin Nanofibrils from Squid Illex argentinus Pens by 2,2,6,6-Tetramethylpiperidin-1-yl Oxyl-Mediated Reaction

High-Strength Nanostructured Film Based on β-Chitin Nanofibrils from Squid Illex argentinus Pens by 2,2,6,6-Tetramethylpiperidin-1-yl Oxyl-Mediated Reaction

Fabrication, Characterization, and Evaluation of Bionanocomposites Based on Natural Polymers and Antibiotics for Wound Healing Applications

Silylated Carbon Nanofiber/Polydimethylsiloxane Based Printable Electrorheological and Sensor Inks for Flexible Electronics

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