Synthesis of chitosan derivatives bearing cyclodextrin and adsorption of p-nonylphenol and bisphenol A

Cyclodextrin-linked alginate beads as supporting materials for Sphingomonas cloacae, a nonylphenol degrading bacteria

“…Due to the highly hydrophobic property of nonylphenol, it was reported to be entrapped into the cavities of CD by hydrophobic interaction (Aoki et al, 2003;Fukazawa et al, 2005). The large surface area of calcium alginate beads was expected to possess an ability to adsorb nonylphenol after coupling of CD.…”

Synthesis of chitosan–cyclodextrin adducts and evaluation of their bitter‐masking properties

“…The synthesis of chitosan-CD adducts, which has precedents in the literature, 16 has found many important applications lately. 26 In our procedure the CDs are functionalized at the start by means of a maleic or succinic spacer, whose free carboxyl group is subsequently activated with a carbodiimide to form amide linkages with amino groups of chitosan.…”

“…13 CDs can be polymerized by themselves using a simple cross-linking agent such as epichlorohydrin, or may be linked to pre-existing polymers, 14 yielding cyclodextrin-grafted polymers in which many CD molecules are supported on a polymeric carrier such as carboxymethyl cellulose 15 or chitosan. 16 Starting from these premises, the present work attempts to investigate the bitter-masking activity of CDs with the aim of widening the scope of their use. We found that covalently bonded adducts of chitosan with β-and γ-CDs are water-soluble polymers that exert ionic and hydrophobic interactions on a wide range of compounds.…”

Nanoparticles Based on Modified Polysaccharides

“…LA was added to the chitosan solution glucosamine residue of chitosan followed by a dropwise addition of 15 mL of EDC methanol solution (0.07 g/L) while stirring. chitosan -Cyclodextrin (Sakairi et al, 1998;Martel et al, 2001;Aoki et al, 2003) Modification: Sakairi prepared -CD linked chitosan using 2-O-formylmethyl--CD by reductive N-alkylation and confirmed the host-guest complex with p-nitrophenol. Chitosan є-Caprolactone Yang et al, 2008b) Modification: The PCL-graft-chitosan copolymers were synthesized by coupling the hydroxyl end-groups on preformed PCL chains and the amino groups present on 6-Otriphenylmethyl chitosan and by removing the protective 6-O-triphenylmethyl groups in acidic aqueous solution Biomedical grade chitosan Monomethoxy poly(ethyleneglycol) (Zhang et al, 2005;Yang et al, 2008b) Modification: Chitosan was completely dissolved in formic acid by stirring and a suitable amount of mPEG was added.…”