Chapter 6 - Chitosan derivatives

Abstract

Chitosan as a single compound can barely achieve the desired anticorrosion effect. Chemical modifications, such as functionalization, copolymerization, and grafting, can enhance chitosan’s corrosion inhibition performance. This chapter takes a look at the synthesis of chitosan derivatives and the inhibitive performance of the derivatives in comparison with the unmodified chitosan. Derivatives that are covered include chitosan-thiosemicarbazide/thiocarbohydrazide derivative, chitosan–polyethylene glycol derivative, chitosan–Schiff base derivatives, chitosan-vanillin derivative, quaternized chitosan derivative, aminotriazolethiol-chitosan derivative, carboxymethyl chitosan derivative, β-cyclodextrin-chitosan derivative, glucosyloxyethyl acrylate graft chitosan derivative and other oligochitosan derivatives, surfactant-chitosan derivative, and acetyl thiourea chitosan derivative, among others. Secondary modifications, mainly nanocompositing and combination with enhancers to further improve their inhibitive performances, are also covered in this chapter.