Fabricating Chitin Paper from Self-Assembled Nanochitins

Kadokawa, Jun‐ichi; Idenoue, Satoshi; Yamamoto, Katsuhiro

doi:10.1021/acssuschemeng.0c02625

Cited by 11 publications

(5 citation statements)

References 49 publications

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“…Paper can be made from chitin nanofibers; Kadokawa et al dissolved chitin in a deep eutectic solvent, then regenerated the chitin through antisolvation with methanol, yielding a network of interwoven self-assembled chitin nanofibers reminiscent of paper [ 124 ]. Paper produced through this method was brittle; addition of benzylamine during regeneration inhibited the formation of crystalline structures in the paper and produced mechanical properties comparable to cellulose filter paper [ 124 ]. Chitin nanofiber papers can also be functionalized to modify their properties.…”

Section: Applicationsmentioning

confidence: 99%

Chitin, Chitosan, and Nanochitin: Extraction, Synthesis, and Applications

2022

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Crustacean shells are a sustainable source of chitin. Extracting chitin from crustacean shells is ongoing research, much of which is devoted to devising a sustainable process that yields high-quality chitin with minimal waste. Chemical and biological methods have been used extensively for this purpose; more recently, methods based on ionic liquids and deep eutectic solvents have been explored. Extracted chitin can be converted into chitosan or nanochitin. Once chitin is obtained and modified into the desired form, it can be used in a wide array of applications, including as a filler material, in adsorbents, and as a component in biomaterials, among others. Describing the extraction of chitin, synthesis of chitosan and nanochitin, and applications of these materials is the aim of this review. The first section of this review summarizes and compares common chitin extraction methods, highlighting the benefits and shortcomings of each, followed by descriptions of methods to convert chitin into chitosan and nanochitin. The second section of this review discusses some of the wide range of applications of chitin and its derivatives.

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Section: Applicationsmentioning

confidence: 99%

Chitin, Chitosan, and Nanochitin: Extraction, Synthesis, and Applications

2022

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“…The reinforcement increased the hydrogel elastic modulus by one-thousand-fold and failure by >200% improving handling and integrity for tissue engineering applicat The self-assembled ChNFs were also formed by gelation of chitin with the choline chloride-thiourea DES system (10% w/w), followed by dilution with water [53]. Furthermore, a paper-like chitin sheet comprising longer ChNFs, named 'chitin paper', was fabricated via regeneration from the solution of chitin in DES of 1-allyl-3-methylimidazolium/ thiourea [54]. The chitin paper exhibited better mechanical properties than the abovementioned self-assembled ChNF film.…”

Section: Preparation Of Composite Materials From Self-assembled Chitin Nanofibersmentioning

confidence: 99%

Preparation of Composite Materials from Self-Assembled Chitin Nanofibers

Kadokawa

2021

Polymers

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Although chitin is a representative abundant polysaccharide, it is mostly unutilized as a material source because of its poor solubility and processability. Certain specific properties, such as biodegradability, biocompatibility, and renewability, make nanofibrillation an efficient approach for providing chitin-based functional nanomaterials. The composition of nanochitins with other polymeric components has been efficiently conducted at the nanoscale to fabricate nanostructured composite materials. Disentanglement of chitin microfibrils in natural sources upon the top-down approach and regeneration from the chitin solutions/gels with appropriate media, such as hexafluoro-2-propanol, LiCl/N, N-dimethylacetamide, and ionic liquids, have, according to the self-assembling bottom-up process, been representatively conducted to fabricate nanochitins. Compared with the former approach, the latter one has emerged only in the last one-and-a-half decade. This short review article presents the preparation of composite materials from the self-assembled chitin nanofibers combined with other polymeric substrates through regenerative processes based on the bottom-up approach.

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“…Processability of chitin in different ILs into different materials and their potential applications are concisely summarized in the previously reported review articles. 26,32 Although deep eutectic solvents, analogous of ILs, have also been employed for the dissolution and subsequent materialization of chitin, [35][36][37][38][39] ILs have some advantages based on the viewpoint of a structural variety with wide range of properties.…”

Section: Introductionmentioning

confidence: 99%