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Metal Complexes of Amphoteric Cryogels Based on Allylamine and Methacrylic Acid
Author(s) -
Tatykhanova Gulnur S.,
Sadakbayeva Zhansaya K.,
Berillo Dmitriy,
Galaev Igor,
Abdullin Khabib A.,
Adilov Zheksenbek,
Kudaibergenov Sarkyt E.
Publication year - 2012
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201100065
Subject(s) - allylamine , methacrylic acid , potentiometric titration , isoelectric point , metal ions in aqueous solution , polymer chemistry , aqueous solution , chemistry , adsorption , copolymer , monomer , metal , polyelectrolyte , titration , inorganic chemistry , polymer , ion , organic chemistry , enzyme
A series of macroporous amphoteric cryogels based on allylamine, methacrylic acid and acrylamide were synthesized by radical copolymerization of monomers in cryoconditions. The average molar composition of amphoteric cryogels was found from the potentiometric and conductimetric titration curves. The morphology of cryogels was evaluated by SEM. Cryogels are highly elastic and have continuous macroporous structure with 50–200 µm pores. The values of the isoelectric pH determined from the swelling experiments arranged between 3.5 and 4.3. Complexation of amphoteric with transition metal ions was studied. Cryogels with adsorbed copper, nickel, or cobalt ions have an intense colour due to formation of coordination and ionic bonds between metal ions and amine and/or carboxylic groups of cryogels. Metal ions entrapped within the pores of cryogels were reduced by treating aqueous solution of NaBH 4 . Formation of micron sized metals on the inner surface of cryogels was observed by SEM.