Effect of Divalent Cation on Swelling Behavior of Anionic Microgels: Quantification and Dynamics of Ion Uptake and Release | Zendy

Vittoria Chimisso | Zendy; Csaba Fodor | Zendy; Wolfgang Meier | Zendy

Open Access

Effect of Divalent Cation on Swelling Behavior of Anionic Microgels: Quantification and Dynamics of Ion Uptake and Release

Author(s) -

Vittoria Chimisso,

Csaba Fodor,

Wolfgang Meier

Publication year - 2019

Publication title -

langmuir

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.042

H-Index - 333

eISSN - 1520-5827

pISSN - 0743-7463

DOI - 10.1021/acs.langmuir.9b02791

Subject(s) - chemistry , divalent , swelling , titration , hydrolysis , pulmonary surfactant , ammonium , metal ions in aqueous solution , metal , inorganic chemistry , ion , precipitation , self healing hydrogels , polymerization , chromatography , polymer chemistry , chemical engineering , organic chemistry , polymer , biochemistry , physics , meteorology , engineering

Poly( N -vinylcaprolactam- co -itaconate) (P(VCL- co -IADME) microgels were synthesized varying the molar ratio between VCL and IADME via free radical precipitation polymerization in the presence of quaternary ammonium surfactant. In order to determine the effect of the divalent metal ions on the structure and the swelling behavior of the microgel systems, both neutral and charged forms of the hydrogels after hydrolysis were investigated. The triggered gel collapse caused by the divalent metal ion together with the quantification of the metal ion uptake was studied in detail by titration and ion chromatography methods and revealed the minimum concentration around 0.1 mM to trigger gel collapse on the treated gels. Uptake and release dynamics of the gels were followed by turbidity measurements and were in the time-range of 2 and 17 s, depending on the composition and the concentrations.

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