High strength nanostructured films based on well-preserved β-chitin nanofibrils

Wu, Qiong; Jungstedt, Erik; Soltésova, Maria; Mushi, Ngesa Ezekiel; Berglund, Lars A.

doi:10.1039/c9nr02870f

Cited by 45 publications

(57 citation statements)

References 61 publications

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“…Again in table 1, we include the composite matrix of the regenerated chitin films/nanopapers that have much smaller Young's modulus, which vary between 6 and 9 GPa [71][72][73][74][75]. Wu et al [72] and Montroni et al [77] explored the excessive chemical treatment and indeed reported 15% decrease in their mechanical performance. If the fibrillar structure of the chitin is used in its native form using mechanical fibrillation techniques, chitin fibrils can offer a number of excellent properties such as an axial fibril modulus of around 60 GPa One of the key factors for conservation of mechanical properties is keeping the hydrogen bonding between the chitin acetyl groups during such treatments.…”

Section: Mechanical Properties Of Chitinmentioning

confidence: 99%

“…All of these processes disrupt the hierarchical structure of the exoskeleton and cause a drastic loss in mechanical properties [3]. Again in table 1, we include the composite matrix of the regenerated chitin films/nanopapers that have much smaller Young's modulus, which vary between 6 and 9 GPa [71][72][73][74][75]. Wu et al [72] and Montroni et al [77] explored the excessive chemical treatment and indeed reported 15% decrease in their mechanical performance.…”

Section: Mechanical Properties Of Chitinmentioning

confidence: 99%

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Understanding the structural diversity of chitins as a versatile biomaterial

Hou

Aydemir

Dumanlı

2021

Phil. Trans. R. Soc. A.

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Chitin is one of the most abundant biopolymers, and it has adopted many different structural conformations using a combination of different natural processes like biopolymerization, crystallization and non-equilibrium self-assembly. This leads to a number of striking physical effects like complex light scattering and polarization as well as unique mechanical properties. In doing so, chitin uses a fine balance between the highly ordered chain conformations in the nanofibrils and random disordered structures. In this opinion piece, we discuss the structural hierarchy of chitin, its crystalline states and the natural biosynthesis processes to create such specific structures and diversity. Among the examples we explored, the unified question arises from the generation of completely different bioarchitectures like the Christmas tree-like nanostructures, gyroids or helicoidal geometries using similar dynamic non-equilibrium growth processes. Understanding the in vivo development of such structures from gene expressions, enzymatic activities as well as the chemical matrix employed in different stages of the biosynthesis will allow us to shift the material design paradigms. Certainly, the complexity of the biology requires a collaborative and multi-disciplinary research effort. For the future's advanced technologies, using chitin will ultimately drive many innovations and alternatives using biomimicry in materials science. This article is part of the theme issue ‘Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 1)'.

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Section: Mechanical Properties Of Chitinmentioning

confidence: 99%

Section: Mechanical Properties Of Chitinmentioning

confidence: 99%

Understanding the structural diversity of chitins as a versatile biomaterial

Hou

Aydemir

Dumanlı

2021

Phil. Trans. R. Soc. A.

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“…In these previous works, the fiber cross-sectional width was near half (3-9 nm) that obtained in the present work, and it is known that thinner and larger nanofibers show higher mechanical properties. In general, the mechanical properties of NF films are influenced by chitin chemical composition (e.g., Mw, CI, DA) and nanofiber structure (length/width ratio), which in turn depends on the biopolymer source along with the isolation procedure, and the NF preparation methods [43,49,50]. Other properties that could affect the nanofibrillated chitin film mechanical properties are the porosity, protein content, thickness, preparation method, and NF orientation [51][52][53].…”

Section: Mechanical Colorimetric and Swelling Degree Propertiesmentioning

confidence: 99%

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

et al. 2021

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β-chitin was isolated from marine waste, giant Humboldt squid Dosidicus gigas, and further converted to nanofibers by use of a collider machine under acidic conditions (pH 3). The FTIR, TGA, and NMR analysis confirmed the efficient extraction of β-chitin. The SEM, TEM, and XRD characterization results verified that β-chitin crystalline structure were maintained after mechanical treatment. The mean particle size of β-chitin nanofibers was in the range between 10 and 15 nm, according to the TEM analysis. In addition, the β-chitin nanofibers were converted into films by the simple solvent-casting and drying process at 60 °C. The obtained films had high lightness, which was evidenced by the CIELAB color test. Moreover, the films showed the medium swelling degree (250–290%) in aqueous solutions of different pH and good mechanical resistance in the range between 4 and 17 MPa, depending on film thickness. The results obtained in this work show that marine waste can be efficiently converted to biomaterial by use of mild extractive conditions and simple mechanical treatment, offering great potential for the future development of sustainable multifunctional materials for various industrial applications such as food packaging, agriculture, and/or wound dressing.

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“…[91,92] More detailed information on the overall top-down nanofibrillation process is available elsewhere. [84,93] Creating nanopapers in bottom-up fashion, on the other hand, obviates the need for a high-energy apparatus by taking advantage of supramolecular self-assembly of NFs from a solution. Several solvent systems (e.g., aqueous alkali/urea, [94,95] halide/ organic solvent, [96] ionic liquids, [97] etc.)…”

Section: Materials and Nanofibrillation For Nfrps And Nanopapersmentioning

confidence: 99%

Optically Transparent Multiscale Composite Films for Flexible and Wearable Electronics

2020

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One of the key breakthroughs enabling flexible electronics with novel form factors is the deployment of flexible polymer films in place of brittle glass, which is one of the major structural materials for conventional electronic devices. Flexible electronics requires polymer films with the core properties of glass (i.e., dimensional stability and transparency) while retaining the pliability of the polymer, which, however, is fundamentally intractable due to the mutually exclusive nature of these characteristics. An overview of a transparent fiber‐reinforced polymer, which is suggested as a potentially viable structural material for emerging flexible/wearable electronics, is provided. This includes material concept and fabrication and a brief review of recent research progress on its applications over the past decade.

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High strength nanostructured films based on well-preserved β-chitin nanofibrils

Abstract: Chitin nanofibrils (ChNFs) are interesting high-value constituents for nanomaterials due to the enormous amount of waste from the seafood industry.

Cited by 45 publications

References 61 publications

Understanding the structural diversity of chitins as a versatile biomaterial

Understanding the structural diversity of chitins as a versatile biomaterial

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

Optically Transparent Multiscale Composite Films for Flexible and Wearable Electronics

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