Chitin and Chitosan Fibers

Agboh, O. C.; Qin, Yimin

doi:10.1002/(sici)1099-1581(199706)8:6<355::aid-pat651>3.0.co;2-t

Cited by 168 publications

(97 citation statements)

References 20 publications

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“…Chitin, which comprises β(1–4)‐linked 2‐acetamido‐2‐deoxy‐β‐ d ‐glucopyranose, is the second most abundant polysaccharide in nature after cellulose. Chitosan, comprising β(1–4)‐linked 2‐amino‐2‐deoxy‐β‐ d ‐glucopyranose, is the deacetylated form of chitin that is commonly isolated from the exoskeletons of crustaceans (Agboh & Qin, ; Dutta, Tripathi, Mehrotra, & Dutta, ; Shahidi, Arachchi, & Jeon, ).…”

Section: Introductionmentioning

confidence: 99%

Optimization of chitin and chitosan production from shrimp wastes and characterization

Tokatlı

Demirdöven

2017

J Food Process Preserv

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The objectives of this study were to optimize and evaluate chitin and chitosan production conditions from shrimp waste using the response surface methodology and to characterize obtained chitosans. The effects of demineralization and deproteinization conditions on chitin production and deacetylation conditions on chitosan production were investigated. Optimum conditions for chitin production were observed at using 0.73 mol/L hydrochloric acid for 132.61 min at room temperature for demineralization and 0.95 mol/L sodium hydroxide for 75.65 min at 60.49 °C for deproteinization. The obtained chitin was used to optimize chitosan production and two different chitosans were defined as chitosan‐1 and chitosan‐2. Chitosan‐1 was obtained by deacetylation with 40% sodium hydroxide at 120 °C for 300 min, and Chitosan‐2 was obtained by deacetylation with 50% sodium hydroxide at 100 °C for 720 min. The obtained chitosans were characterized by their degree of deacetylation, molecular weight, viscosity, mineral content, whiteness index, and scanning electron microscope micrographs. Practical applications Chitosan, carbohydrate‐based polymer, is derived from crustacean shells. The extraction process of chitin and chitosan from shrimp wastes sourced of different sources needs optimization to obtain high yield chitosan without impurity. Although the production of chitosan by chemical method has been studied earlier, this is the first report on extraction of chitin and chitosan from shrimp waste from the Marmara Sea in Turkey. Shrimp waste from Marmara Sea in Turkey, which has no economic value, can be successfully converted into chitosan. The effective utilization of these wastes would not only eliminate waste but also contribute to the economy as value‐added products.

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Section: Introductionmentioning

confidence: 99%

Optimization of chitin and chitosan production from shrimp wastes and characterization

Tokatlı

Demirdöven

2017

J Food Process Preserv

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“…Typical reactions and products include chitosan salts, N-acylation, Schiff bases and their reduced products, reaction with halogen-substituted compounds, and chelation of metal ions. 32 Chitin and chitosan fibres are typically made by wet spinning, 32 in which fibres are produced by dissolving the polymer in a solvent and then extruding the solution via fine holes into a non-solvent. The precipitate is in the form of a filament, which can be washed, drawn and dried to form fibres.…”

Section: Chitin and Chitosanmentioning

confidence: 99%

“…Chitin fibres can also be made in highly oriented structures when stretched via dry-jet wetspinning, 32 or other stretching processes. The mechanical properties of chitin fibres are determined by the synthesis conditions and spinning techniques utilized.…”

Section: Chitin and Chitosanmentioning

confidence: 99%

“…36 This can be explained because the acetamide groups form hydrogen bonds, causing the crystallinity and strength of inter-chain forces in chitin to increase. 32 Alginate Alginate, a natural polysaccharide, is extracted from brown seaweeds by treatment with aqueous alkali solutions, such as NaOH. During this process, the salt form of natural alginate is converted to water-soluble sodium alginate, 40 which can be precipitated by addition of calcium chloride.…”

Section: Chitin and Chitosanmentioning

confidence: 99%

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Fibre-reinforced hydrogels with high optical transparency

Maranchi

Trexler

Guo

et al. 2014

International Materials Reviews

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Fibre-reinforced hydrogels with high optical transparency are an emerging composite material with great promise to enable new applications, such as a transparent wound dressing with custom tuned mechanical properties that provides desirable mechanical and physical properties along with optical clarity for facile wound inspection. Stand-alone hydrogels are an important class of materials comprising a cross-linked polymer network surrounded by a water matrix. However, their mechanical properties are typically very modest compared with other materials. While significant research is going on in parallel in the fields of hydrogels and reinforcement fibres, researchers are only starting to scratch the surface of the possibilities of combining the two. This report provides a review of natural and synthetic reinforcement fibre research with special emphasis placed on nanofibres. These provide the added benefit of transparency by being much smaller than the wavelength of visible light. A review of hydrogel materials is also presented. The mechanical properties, optical properties and biological functionality of hydrogel systems are also described. Ocular, load-bearing tissue, wound management and sensing/ device applications are all discussed. Transparent fibre-reinforced hydrogels provide a compelling potential solution to enable advanced functionality, in particular in the wound care and optical application areas.

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“…Nowadays, the trend towards producing high-quality chitin for biomedical and pharmaceutical use emphasizes the chitin quality and physicochemical properties. The main reason for the current limited approaches being taken to utilize chitin is the difficulty in processing this material due to its insolubility in most aqueous and organic solvents [53,54] and the energy needed for its extraction from the shellfish waste. Specific physicochemical and functional properties of chitin that are affected by current extraction process protocols include the degradation of the chitin structure, including the decrease in molecular weight and resulting solution viscosity, as well as the degree of deacetylation [55].…”

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confidence: 99%

A “green” industrial revolution: Using chitin towards transformative technologies

Barber

Shamshina

2013

Pure and Applied Chemistry

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Even with the high costs of environmental exposure controls, as well as the chance of control failures, options for industries wanting to implement sustainability through frameworks such as green chemistry are not yet cost-effective. We foresee a "green" industrial revolution through the use of transformative technologies that provide cost-effective and sustainable products which could lead to new business opportunities. Through example, we promote the use of natural and abundant biopolymers such as chitin, combined with the solvating power of ionic liquids (ILs), as a transformative technology to develop industries that are overall better and more cost-effective than current practices. The use of shellfish waste as a source of chitin for a variety of applications, including high-value medical applications, represents a total byproduct utilization concept with realistic implications in crustacean processing industries.

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Chitin and Chitosan Fibers

Cited by 168 publications

References 20 publications

Optimization of chitin and chitosan production from shrimp wastes and characterization

Optimization of chitin and chitosan production from shrimp wastes and characterization

Fibre-reinforced hydrogels with high optical transparency

A “green” industrial revolution: Using chitin towards transformative technologies

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