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Metal-chelating chitin derivatives via reaction of chitosan with nitrilotriacetic acid

✍ Scribed by Vladimir E. Tikhonov; Lidia A. Radigina; Ygor A. Yamskov

Book ID: 102996500
Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 406 KB
Volume: 290
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(96)00112-7

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✦ Synopsis

Chitosan was cross-linked to various extents with nitrilotriacetic acid in the presence of a water-soluble carbodiimide in homogeneous solution, and was then fully N-acetylated. The structure of the nitrilotriacetic acid residues attached to the chitin backbone was determined by acid-base titration. It was shown that the chitin derivatives contained both iminodiacetate and iminomonoacetate residues which form l:l-type complexes with copper ions. The chitin gels obtained swelled reversibly with water and behaved like ampholytic cross-linked resins in aqueous solutions of acids and bases.

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