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Polyvalent metal cation modified dextran hydrogels: non‐size exclusion applications
Author(s) -
Spychaj Tadeusz,
Bartkowiak Artur
Publication year - 1998
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199802)9:2<138::aid-pat739>3.0.co;2-l
Subject(s) - epichlorohydrin , dextran , metal , self healing hydrogels , aqueous solution , polymer chemistry , infrared spectroscopy , covalent bond , chemistry , nuclear chemistry , materials science , inorganic chemistry , organic chemistry
Dextran gels crosslinked covalently with epichlorohydrin and by coordinate bonding with polyvalent metal cations were prepared and characterized. Concentrations of the metal cations: 0.2 mmol/g of dextran almost always in the form of sulfate (Mg(II), Cu(II), Zn(II), Ni(II), Co(II), Mn(II), Al(III), Fe(III) and Ti(IV)) as well as of epichlorohydrin: 1.5 mol/mol of dextran were kept at a constant level. The contents of the modifying cations and some physicochemical properties of spherical gel particles were investigated by atom absorption spectrometry, scanning electron microscopy, infrared spectrometry (IR) and derivatography. Characteristic shifts, in comparison with the linear dextran and epichlorohydrin crosslinked dextran gel of band wavelengths and of temperatures were revealed by IR and derivatography. These observations are connected with differences in the complexation strengths of polyvalent metal cations with hydroxyl groups of epichlorohydrin crosslinked dextran matrix. Some nonexclusion directions of application covering catalytic activity in dry as well as swollen aqueous gel states were tested. © 1998 John Wiley & Sons, Ltd.