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Complexation of macroporous amphoteric cryogels based on N , N ‐dimethylaminoethyl methacrylate and methacrylic acid with dyes, surfactant, and protein
Author(s) -
Kudaibergenov Sarkyt E.,
Tatykhanova Gulnur S.,
Klivenko Alexey N.
Publication year - 2016
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.43784
Subject(s) - pulmonary surfactant , polyelectrolyte , isoelectric point , adsorption , polymer chemistry , chemistry , dodecylbenzene , monomer , lysozyme , methacrylic acid , methacrylate , copolymer , sulfonate , methyl methacrylate , chemical engineering , nuclear chemistry , sodium , organic chemistry , polymer , biochemistry , engineering , enzyme
Macroporous amphoteric cryogels based on N , N ‐dimethylaminoethylmethacrylate and methacrylic acid p(DMAEM‐ co ‐MAA) crosslinked by N , N ′‐methylenebisacrylamide (MBAA) were synthesized by radical copolymerization of monomer mixtures in cryoconditions. The structure and morphology of cryogels were evaluated by FTIR and SEM. Cryogels exhibited interconnected porous structure with pore size ranging from 40 to 80 µm, which depended on their crosslinking degree. The value of the isoelectric point (IEP) of equimolar amphoteric cryogel determined from the water flux was equal to 4.4, while the IEP of cryogel with the excess of DMAEM units was equal to 7.1. The mechanical strength of equimolar amphoteric cryogels increases with increasing amount of crosslinking agent. The complexation ability of amphoteric cryogels with respect to surfactant, dyes, and protein was demonstrated. The adsorption isotherms with respect to anionic surfactant—sodium dodecylbenzene sulfonate (SDBS) and protein—lysozyme correspond to Langmuir equation, while adsorption isotherms of anionic and cationic dyes—methylene blue (MB) and methyl orange (MO) are well described by Freundlich equation. It was found that the binding ability of p(DMAEM‐ co ‐MAA) with respect to various low‐ and high‐molecular weight compounds changes in the following order: SDBS > lysozyme ≫ MO > MB. The preferential adsorption of MB from the mixture of protein and MB was shown. The quantitative release of protein, surfactant and dye molecules from the matrix of cryogels takes place at the IEP of cryogel. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43784.