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Imprinted poly (vinyl alcohol) as a promising tool for xanthine derivatives separation
Author(s) -
Patachia Silvia,
Croitoru Catalin
Publication year - 2011
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.34305
Subject(s) - vinyl alcohol , sorption , glutaraldehyde , langmuir , freundlich equation , aqueous solution , materials science , molecularly imprinted polymer , polymer , chemical engineering , xanthine , polymer chemistry , chemistry , chromatography , organic chemistry , adsorption , selectivity , composite material , catalysis , engineering , enzyme
In this work, we report the obtaining of an ecological imprinted polymer for the selective sorption of xanthine derivatives (caffeine and theobromine) from aqueous solutions, through an innovative approach. Poly (vinyl alcohol) [PVA]‐xanthine films have been obtained by aqueous solution casting. PVA crosslinking has been performed by using glutaraldehyde in gaseous phase. Template elimination has been achieved by “washing” of crosslinked films with water. To check the polymer imprentation and to determine the imprinted material effectiveness in xanthines separation, sorption studies have been performed. Freundlich, Langmuir, BET, Extended Langmuir models, and Scatchard analysis have been applied on the experimental data to better characterize the sorption mechanism. Fluorescence microscopy has been proposed as suitable method to check the imprentation level of the polymer. The information obtained by this method is in good agreement with the values for the efficiency of the imprinted polymer and could serve as an easier tool for prediction of the imprinted polymers performance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122:2081–2089, 2011