1998
DOI: 10.1002/(sici)1097-4628(19981017)70:3<501::aid-app11>3.0.co;2-3
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Synthesis of crosslinked chitosan-crown ethers and evaluation of these products as adsorbents for metal ions

Abstract: ABSTRACT:Two new crosslinked-crown ethers (CCTS-NACH-B-15-C-5 and CCTS-NACH-B-18-C-6) were synthesized by the reaction of crosslinked chitosan (CCTS-NH 2 )

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Cited by 76 publications
(15 citation statements)
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“…Chitosans possess many amine groups in their chemical structure and as such can chelate iron and thus eliminate its prooxidant activity (Winterowd and Sanford 1995;Peng et al 1998). Different viscosity chitosans were found to protect cooked cod from oxidation to varying degrees, presumably due to different degrees of deacetylation and/or molecular weight/proportion of amino groups in the molecules.…”
Section: Resultsmentioning
confidence: 99%
“…Chitosans possess many amine groups in their chemical structure and as such can chelate iron and thus eliminate its prooxidant activity (Winterowd and Sanford 1995;Peng et al 1998). Different viscosity chitosans were found to protect cooked cod from oxidation to varying degrees, presumably due to different degrees of deacetylation and/or molecular weight/proportion of amino groups in the molecules.…”
Section: Resultsmentioning
confidence: 99%
“…Azacrown ethers have specific complex selectivity and stability for heavy or precious metal ions,11 but their solubility is too great to recover after being used. If crown ethers were grafted to the chitosan chain to give chitosan–crown ethers containing double structures and properties, then these novel chitosan derivatives have wide‐ranging application for the separation and concentration of heavy or precious metal ions 12. In the present study, the amino group in chitosan was protected from the reaction of benzaldehyde and chitosan to form N ‐benzylidene chitosan.…”
Section: Introductionmentioning
confidence: 92%
“…The selective chelating properties exhibited by crown ethers towards metal ions have led to their incorporation into chitosan polymer matrices to improve capacity for metal ion adsorption [1][2][3], enhance selective pollutant removal [4,5], and thus wastewater remediation [6,7]. While many authors have chemically modified crosslinked chitosan with crown ethers [5,6,[8][9][10][11][12][13][14][15][16][17], and shown the advantage of combining crown ethers with chitosan [5,8,9,18,19], only a few have used the crown ether as the crosslinker for chitosan [7,18,[20][21][22][23][24] and fewer have used the nitrogen containing azacrown ethers [25]. Using the azacrown ether as the crosslinker has the advantage that the consumption of the -NH 2 chelating group of the chitosan might be compensated by the azacrown ether chelating property.…”
Section: Introductionmentioning
confidence: 99%