ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Introduction of amidoxime groups into cellulose substrate was investigated by reaction of cyano-group-containing celluloses such as cyanoethylcellulose (CE-Cell) and acrylonitrilegrafted cellulose (G-Cell) with hydroxylamine at 70°C in water medium (pH = 7.0). Dissolving pulp from softwood was used as the cellulose sample, and photografting was applied to the preparation of G-Cell, where hydrogen peroxide was used as a photoinitiator. Degree of substitution (DS) of CE-Cell and percent grafting of G-Cell employed were less than 1.5 and 40, respectively. The amidoximation of CE-Cell proceeded easily, and the amidoxime content increased with increasing the reaction time and increasing the concentration of hydroxylamine, but the amidoxime content of G-Cell decreased significantly at longer reaction time. The amidoximated samples prepared by CE-Cell exhibited an ability to adsorb metal ions such as Cu2+, Ni2+, and Co2+, and the adsorbed amount of Cu2+ was highest among the three metal ions. Moreover, the adsorption of Cu2+ varied depending on the DS of CE-Cell. That is, the absorption ability was reduced when the sample was prepared using CE-Cell with higher DS. The amidoximated samples prepared from G-Cell showed adsorption of Cu2+ similar to samples prepared by CE-Cell with lower DS, irrespective of percent grafting. © 1995 John Wiley & Sons, Inc.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1995.070560204
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