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Swelling/Deswelling Self-Oscillating of Microgels Induced by the BZ Reaction with Fe(phen)3 Catalyst
Jie Ren,Jinfen Gu,Li Tao,Guangcheng Zhang,Wu Yang 한국고분자학회 2016 Macromolecular Research Vol.24 No.6
A novel kind of microgels, poly(NIPAAm-co-Fe(phen)3-co-AAc), were prepared by copolymerization N-isopropylacrylamide (NIPAAm), acrylic acid (AAc) and iron(II) 5-acrylamide-1,10-phenanthroline-bi(1,10-phenanthroline) (Fe(phen)3), the catalyst for the Belousov-Zhabotinsky (BZ) reaction. The microgels were characterized by FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS), dynamic light scattering (DLS) and scanning electron microscope (SEM). In addition, the self-oscillating behaviors of the microgels were investigated in BZ system free of catalyst. Both the redox potential and transmittance self-oscillation were observed. Moreover, the amplitudes of poly(NIPAAm-co-Fe(phen)3-co-AAc) microgels are much larger than those of linear polymer and gel. This advantage originated from the special structure, size and composition of the microgels.