Premium
Introduction of amidoxime groups into cellulose and its ability to adsorb metal ions
Author(s) -
Kubota Hitoshi,
Shigehisa Yasumichi
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070560204
Subject(s) - cellulose , adsorption , hydroxylamine , chemistry , nuclear chemistry , polymer chemistry , grafting , metal ions in aqueous solution , photoinitiator , hydrogen peroxide , metal , photografting , monomer , organic chemistry , polymer
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 Cu 2+ , Ni 2+ , and Co 2+ , and the adsorbed amount of Cu 2+ was highest among the three metal ions. Moreover, the adsorption of Cu 2+ 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 Cu 2+ similar to samples prepared by CE‐Cell with lower DS, irrespective of percent grafting. © 1995 John Wiley & Sons, Inc.