Preparative methods of phosphorylated chitin and chitosan—An overview

Jayakumar, R.; Selvamurugan, N.; Nair, Shantikumar V.; Tokura, Seiichi; Tamura, Hiroshi

doi:10.1016/j.ijbiomac.2008.07.004

Cited by 169 publications

(81 citation statements)

References 34 publications

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“…Phosphorylated chitosan can be prepared by heating chitosan with orthophosphoric acid in N,N-dimethylformamide (DMF). Another way to prepare phosphorylated chitosan is by the reaction of chitosan with phosphorous pentoxide in methanesulphonic acid, this method is considered very eicient (Figure 8) [59]. The methods described here promote phosphorylation of the hydroxyl groups in carbons 3 and 6 of chitosan.…”

Section: Phosphorylationmentioning

confidence: 99%

Chitosan, Chitosan Derivatives and their Biomedical Applications

Muñoz¹,

Corrales²

2017

Biological Activities and Application of Marine Polysaccharides

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Chitosan is one of the most studied polysaccharides nowadays. Because of its biocompatibility, biodegradability and abundance in nature, it has had a wide number of applications. In this chapter, an overview of chitosan including its physicochemical properties and characterization methods is presented. Subsequently, the main chitosan chemical modiications via the hydroxyl and amino groups are discussed. These chemical modiications improve chitosan physical properties and expand its range of applications especially in the biomedical ield which will also be studied.

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Section: Phosphorylationmentioning

confidence: 99%

Chitosan, Chitosan Derivatives and their Biomedical Applications

Muñoz¹,

Corrales²

2017

Biological Activities and Application of Marine Polysaccharides

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“…[162][163][164] Some examples are: modification through graft copolymerization with polymers like polyurethanes, poly(2-alkyl-oxazolines), poly(ethylene-glycol)s, block polyethers, poly (ethylene-imine)s, poly(2-hydroxyalkanoate)s, poly(dimethylsiloxane)s, and dendrimerlike hyperbranched polymers. 162 It can also be chemically phosphorylated, 163 acylated, and alkylated, a Schiffs base formed and then reduced, carboxylated, phthaloylation, silylated, tosylated, and the quaternary salt formated, sulfated, and thiolated. 164 Chitosan can be molded as fibers, 161 films, 165 or precipitated in different micromorphologies from its acidic aqueous solutions.…”

Section: It Is a Linear Cationic Heteropolymer Of (1-4)-linked N-acetmentioning

confidence: 99%

Hydrophobic Polymers from Food Waste: Resources and Synthesis

2013

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“…A wide variety of medical applications for chitin and chitosan derivatives have been reported in the last few years [137][138][139]. Thus chitin and chitosan were suggested to be used for arsenic species complexation and removal.…”

Section: Chelation Studiesmentioning

confidence: 99%

Antioxidant Polymers: Metal Chelating Agents

Zalloum

Mubarak

2012

Antioxidant Polymers

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Antioxidants are generally used to retard the reaction of organic materials, such as synthetic polymers, with atmospheric oxygen. Such a reaction can cause the degradation of the polymer and can alter many of its properties. This in turn could lead to loss of flavor and the development of rancidity in foods, to an increase in viscosity and acidity, and to the formation of insolubles in lubricants. Natural polysaccharides -chitosan, chitin, and alginates -are biopolymers that are biodegradable, biocompatible, environmentally friendly, and nontoxic. Additionally, these polymers and many of their derivatives act as antioxidant materials; this is mainly attributed to the active hydroxyl and amino groups present in these biopolymers. Since chitosan, chitin, and alginates act as metal-chelating agents, this review will cover the existing and most recent literature on the use of these materials and their derivatives for this purpose, in addition to the synthetic methods for their derivatives, and their use as metal-chelating agents.

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Preparative methods of phosphorylated chitin and chitosan—An overview

Cited by 169 publications

References 34 publications

Chitosan, Chitosan Derivatives and their Biomedical Applications

Chitosan, Chitosan Derivatives and their Biomedical Applications

Hydrophobic Polymers from Food Waste: Resources and Synthesis

Antioxidant Polymers: Metal Chelating Agents

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