Studies on the preparation and characterization of monodisperse polymeric chelating resins

• Main Authors: Rweng-Je Tasi, 蔡榮哲
• Other Authors: Keh-Ying Hsu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/9pm8gn

碩士 === 中原大學 === 化學工程研究所 === 92 === Monodisperse micro-sized porous poly(glycidylmethacrylate-co-trimethylolpropane trimethacrylate) copolymer particles were prepared by dispersion polymerization and seeded emulsion polymerization, used as polymeric substrate. These particles were modified by several kinds of the chelating group (as histamine, 2-(aminomethyl)pyridine, imidazole, 1,2,4-triazole, pyrazole and 3,5-dimethylpyrazole) via a ring-opening reaction, respectively, in which the epoxy group on glycidylmethacrylate reacted with the chelating group in solvent, to obtain chelating resins. The characterization were determined and indentified by EA, FT-IR spectrum and solid state NMR to see whether resins were modified successful or not, and investigate the effect of all kinds of adsorption operating conditions on the amount of adsorption of copper ion. From results of experiment, the highest amount of adsorption found in the range of the pH value was between 5.5 and 6.5, as the increase of the adsorption temperature and concentration of copper ion added, the amount of copper ion adsorption increased . In mixed metal ion solution, copper ion had better selectivity. Regeneration was not as good as what we expected. Besides, the rate of adsorption was depended on the difference of the stable constant betweeen resins and copper ion. Fixed the total amounts of monomers (monomer and crosslinking agent), then changed the ratio of the monomer to crosslinking agent, to obtain copolymer particles with different GMA content, if the amount of GMA monomer increased, amount of copper ion adsorption increased. Copolymer particles were modified by the different molar dose of histamine, similarly, it was found that as the molar dose was increased, the amount of copper ion adsorption was increased.