Preparation and Hydrogel Properties of pH-Sensitive Amphoteric Chitin Nanocrystals

Jiang, Jie; Yu, Juan; Liu, Liang; Wang, Zhiguo; Fan, Yimin; Satio, Tsuguyuki; Isogai, Akira

doi:10.1021/acs.jafc.8b02899

Cited by 36 publications

(36 citation statements)

References 29 publications

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“… 240 , 346 Deacetylation of TEMPO-oxidized chitin or TEMPO-mediated oxidation of partially deacetylated chitin yields ChNC with both amine and carboxyl groups, which are amphoteric and zwitterionic. 361 , 362 The obtained ChNC is stable in alkaline and acidic conditions and can interact due to their amphoteric character with both cationic and anionic dyes or other species.…”

Section: Deconstruction and Modification Of Biopolymers And Biocolloidsmentioning

confidence: 99%

Deconstruction and Reassembly of Renewable Polymers and Biocolloids into Next Generation Structured Materials

et al. 2021

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This review considers the most recent developments in supramolecular and supraparticle structures obtained from natural, renewable biopolymers as well as their disassembly and reassembly into engineered materials. We introduce the main interactions that control bottom-up synthesis and top-down design at different length scales, highlighting the promise of natural biopolymers and associated building blocks. The latter have become main actors in the recent surge of the scientific and patent literature related to the subject. Such developments make prominent use of multicomponent and hierarchical polymeric assemblies and structures that contain polysaccharides (cellulose, chitin, and others), polyphenols (lignins, tannins), and proteins (soy, whey, silk, and other proteins). We offer a comprehensive discussion about the interactions that exist in their native architectures (including multicomponent and composite forms), the chemical modification of polysaccharides and their deconstruction into high axial aspect nanofibers and nanorods. We reflect on the availability and suitability of the latter types of building blocks to enable superstructures and colloidal associations. As far as processing, we describe the most relevant transitions, from the solution to the gel state and the routes that can be used to arrive to consolidated materials with prescribed properties. We highlight the implementation of supramolecular and superstructures in different technological fields that exploit the synergies exhibited by renewable polymers and biocolloids integrated in structured materials.

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Section: Deconstruction and Modification Of Biopolymers And Biocolloidsmentioning

confidence: 99%

Deconstruction and Reassembly of Renewable Polymers and Biocolloids into Next Generation Structured Materials

et al. 2021

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“…9 Furthermore, partial deacetylation with TEMPO-oxidation was shown to result in amphoteric ChNCs. 219,231 Ammonium persulfate is another oxidant that can be used for ChNC isolation, 217 usually ending up with a higher charge than with TEMPObased ChNCs. 216 Surveying a completely different bottom-up approach, Kadokawa et al 222 found that chitin regenerated from an ionic liquid can reassemble into a whisker form when the resulting chitin-ionic liquid gel is soaked in methanol.…”

Section: Biomacromoleculesmentioning

confidence: 99%

Nanomaterials Derived from Fungal Sources—Is It the New Hype?

et al. 2019

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Greener alternatives to synthetic polymers are constantly being investigated and sought after. Chitin is a natural polysaccharide that gives structural support to crustacean shells, insect exoskeletons, and fungal cell walls. Like cellulose, chitin resides in nanosized structural elements that can be isolated as nanofibers and nanocrystals by various top-down approaches, targeted at disintegrating the native construct. Chitin has, however, been largely overshadowed by cellulose when discussing the materials aspects of the nanosized components. This Perspective presents a thorough overview of chitin-related materials research with an analytical focus on nanocomposites and nanopapers. The red line running through the text emphasizes the use of fungal chitin that represents several advantages over the more popular crustacean sources, particularly in terms of nanofiber isolation from the native matrix. In addition, many β-glucans are preserved in chitin upon its isolation from the fungal matrix, enabling new horizons for various engineering solutions.

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“…Chitin was suspended in sodium phosphate buffer (pH = 6.86) containing a certain amount of TEMPO, NaClO 2 , and NaClO, and the chitin nanofibers were obtained by oxidation under certain conditions. Jiang et al [ 82 ] prepared chitin nanocrystals with a length of 200–600 nm and a width of 6–15 nm by a similar method using TEMPO/NaClO 2 /NaClO system at pH = 6.8.…”

Section: Preparation Methods Of Nano‐chitinmentioning

confidence: 99%

Recent Progress in Preparation and Application of Nano‐Chitin Materials

Yang

Liu

Pei

et al. 2020

Energy & Environ Materials

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Chitin is a kind of natural macromolecule material which was first discovered in mushrooms and was widely found in the shells of crustaceans and arthropods, the cell walls of fungi (yeast and mold) and algae, and the mollusks. The original chitin in nature usually has an antiparallel molecular chain alignment forming nanofibers connected by inter-and intramolecular hydrogen bonds. These microfibers consist of nanofibers about 2-5 nm in diameter, and about 300 nm long, embedded by protein matrices. Due to their unique dimensional, optical, mechanical, and other characteristics, the preparation of nano-chitin materials is an important subject. It is possible to extract nano-chitins from their sources with various methods, including acid hydrolysis, mechanical disintegration, TEMPO-mediated oxidation, electrospinning, and others. In this article, the latest progress in recent years in the preparation and applications of nano-chitin were reviewed. The morphology of the nano-chitins obtained from the above methods was presented. The advantages and disadvantages of each method were analyzed. An overview of applications of nano-chitins was discussed, including biomedicine, food applications, water treatment, green electronic materials, enzyme immobilization carriers, cotton textile materials, cosmetics, and others. REVIEW Nano-Chitin Materials

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Preparation and Hydrogel Properties of pH-Sensitive Amphoteric Chitin Nanocrystals

Cited by 36 publications

References 29 publications

Deconstruction and Reassembly of Renewable Polymers and Biocolloids into Next Generation Structured Materials

Deconstruction and Reassembly of Renewable Polymers and Biocolloids into Next Generation Structured Materials

Nanomaterials Derived from Fungal Sources—Is It the New Hype?

Recent Progress in Preparation and Application of Nano‐Chitin Materials

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