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- W2977778925 abstract "The thermo-responsive swelling-shrinking behaviour of the poly(N-isopropylacrylamide) (PNIPAM) hydrogels under the effect of temperature change have mechanistic function upon controlling the uptake and release of Cr3+ ions by the hydrogel networks. In this study, acrylic acid (AA) was co-polymerized with PNIPAM onto the silica-coated magnetic nanoparticles (MNPs) to form thermo-magneto-responsive (PNIPAM-co-AA)-silica-PVP-MNPs composite hydrogels with increased density of Cr3+ binding groups. Its temperature-manipulated adsorption-desorption efficiency as well as their magnetic phase separability were investigated. Chromium-loaded hydrogels shown apparent phase separation under influence of low gradient magnetic field. Desorption of Cr3+ gradually predominated as temperature increased from 298 K to 323 K. Under high initial Cr3+ concentration whereby physical adsorption is prevailing, the re-uptake of Cr3+ occurred when the solution being cooled down to 298 K. Furthermore, the adsorption kinetic analysis revealed that the adsorption of Cr3+ by (PNIPAM-co-AA)-silica-PVP-MNPs hydrogels was governed by surface precipitation of Cr3+." @default.
- W2977778925 created "2019-10-10" @default.
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- W2977778925 date "2019-12-01" @default.
- W2977778925 modified "2023-10-16" @default.
- W2977778925 title "Adsorption-desorption characteristic of thermo-magneto-responsive poly(N-isopropylacrylamide)-co-acrylic acid composite hydrogel towards chromium (III) ions" @default.
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- W2977778925 doi "https://doi.org/10.1016/j.jwpe.2019.100957" @default.
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