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Swelling behavior of polyelectrolyte gels in the presence of salts
Author(s) -
Jeon C. H.,
Makhaeva E. E.,
Khokhlov A. R.
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981201)199:12<2665::aid-macp2665>3.0.co;2-6
Subject(s) - polyelectrolyte , sodium dodecylbenzenesulfonate , chemistry , pulmonary surfactant , sodium dodecyl sulfate , swelling , polymer chemistry , aqueous solution , sodium , cetylpyridinium chloride , monomer , salt (chemistry) , polymer , chromatography , chemical engineering , organic chemistry , biochemistry , engineering
The swelling behavior of weakly crosslinked polyelectrolyte gels based on sodium methacrylate (PMA) and diallyldimethylammonium chloride (DADMAC) in aqueous medium was studied in the presence of different types of salts (NaCl, arginine hydrochloride, cetylpyridinium chloride (CPC), sodium dodecyl sulfate (SDS), and sodium dodecylbenzenesulfonate (SDBS)). It is shown that, starting from some characteristic concentration of a salt, a further increase of the salt concentration results in the shrinking of the gels. This characteristic concentration is defined by the gel parameters (polymer concentration in the gel that is a function of the monomer concentration at the conditions of hydrogel synthesis) and does not depend on the kind of salt used, except for the system polyelectrolyte gel/oppositely charged surfactant (PMA‐CPC and DADMAC‐SDS or SDBS). It is shown that the initial rate of gel shrinking for all studied systems, including the system gel/oppositely charged surfactant, is determined by the salt concentration and the gel parameters. For the systems PMA‐CPC and DADMAC‐SDS the gel collapse is a two‐step process.