Characterization and Properties of Chitosan

By E. Alvarenga. 2011

178 citations recorded by the source corpus.

The biopolymer is characterized as either chitin or chitosan according to the degree of deacetylation (DD) which is determined by the proportion of D-glucosamine and N-acetylD-glucosamine. Structurally, chitosan is a straight-chain copolymer composed of D-glucosamine and N-acetyl-D-glucosamine being obtained by the partial deacetylation of chitin. Chitosan is the most abundant basic biopolymer and is structurally similar to cellulose, which is composed of only one monomer of glucose (Fig. 1). Chitosan solubility, biodegradability, reactivity, and adsorption of many substrates depend on the amount of protonated amino groups in the polymeric chain, therefore on the proportion of acetylated and non-acetylated D-glucosamine units. The amino groups (pKa from 6.2 to 7.0) are completely protonated in acids with pKa smaller than 6.2 making chitosan soluble. Chitosan is insoluble in water, organic solvents and aqueous bases and it is soluble after stirring in acids such as acetic, nitric, hydrochloric, perchloric and phosphoric (Guibal, 2004; Kluget al., 1998; Kubota et al., 2000; Kurita, 2006; Anthonsen & Smidsroed, 1995; Rinaudo, 2006; Sankararamakrishnan & Sanghi, 2006).

Subfields: Biomaterials, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/2af48a8d2f86a4de0af5f981f5c661e8bb543be0

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In Biomaterials

  1. I. Younes
  2. M. Rinaudo
  3. E. Shalaby
  4. C. Jérôme
  5. Florence Croisier

In Surfaces, Coatings and Films

  1. I. Younes
  2. M. Rinaudo
  3. E. Shalaby
  4. C. Jérôme
  5. Florence Croisier

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