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A platform for research: civil engineering, architecture and urbanism
Kaolinite-polymer compounds by grafting of 2-hydroxyethyl methacrylate and 3-(trimethoxysilyl)propyl methacrylate
AbstractNovel kaolinite-polymer solids containing methacrylate groups were prepared by functionalization of the Brazilian São Simão kaolinite with the monomers 2-hydroxyethyl methacrylate (HEMA) and 3-(trimethoxysilyl)propyl methacrylate (TMSPM). Functionalization involved reflux of the monomers in the presence of kaolinite previously intercalated with dimethylsulfoxide (DMSO). HEMA and TMSPM effectively displaced DMSO molecules from the clay mineral interlayer, forming AlOC bonds in organic-inorganic hybrid matrices. The resulting materials were characterized by powder X-ray diffraction, thermal analysis, infrared spectroscopy and TEM analysis. Powder X-ray diffraction evidenced the intercalation of DMSO, and its substitution by HEMA and TMSPM. Thermal analyses indicated that HEMA- and TMSPM-functionalized kaolinite materials were thermally stable up to 300°C. The shift of the infrared bands due to interlayer hydroxyl groups and the presence of bands due to characteristic vibrations of the methacrylate groups (3349, 3331, 3290, and 1589cm−1) also confirmed the functionalization of the kaolinite with the monomers. The ability of both monomers to graft methacrylate groups onto kaolinite interlayer space was also analyzed. The solids obtained were used as adsorbents of dye methylene blue (MB), showing that the clay nanocomposites could remove the dye more efficiently than the isolated precursors (pure kaolinite and the polymers) separately. The kinetics of the process followed a pseudo-second order model and equilibrium fitted well to the Freundlich model.
Graphical abstract
HighlightsComposites based on kaolinite/metacrylate precursor's were prepared by in situ grafting and polymerization.Powder were obtained after ball milling the of polymer-clay composites.Composites were applied as adsorbents of methylene blue with higher adsorption capacity.Composites kaolinite-metacrylate present higher adsorption capacity than isolated polymers and kaolinite.
Kaolinite-polymer compounds by grafting of 2-hydroxyethyl methacrylate and 3-(trimethoxysilyl)propyl methacrylate
AbstractNovel kaolinite-polymer solids containing methacrylate groups were prepared by functionalization of the Brazilian São Simão kaolinite with the monomers 2-hydroxyethyl methacrylate (HEMA) and 3-(trimethoxysilyl)propyl methacrylate (TMSPM). Functionalization involved reflux of the monomers in the presence of kaolinite previously intercalated with dimethylsulfoxide (DMSO). HEMA and TMSPM effectively displaced DMSO molecules from the clay mineral interlayer, forming AlOC bonds in organic-inorganic hybrid matrices. The resulting materials were characterized by powder X-ray diffraction, thermal analysis, infrared spectroscopy and TEM analysis. Powder X-ray diffraction evidenced the intercalation of DMSO, and its substitution by HEMA and TMSPM. Thermal analyses indicated that HEMA- and TMSPM-functionalized kaolinite materials were thermally stable up to 300°C. The shift of the infrared bands due to interlayer hydroxyl groups and the presence of bands due to characteristic vibrations of the methacrylate groups (3349, 3331, 3290, and 1589cm−1) also confirmed the functionalization of the kaolinite with the monomers. The ability of both monomers to graft methacrylate groups onto kaolinite interlayer space was also analyzed. The solids obtained were used as adsorbents of dye methylene blue (MB), showing that the clay nanocomposites could remove the dye more efficiently than the isolated precursors (pure kaolinite and the polymers) separately. The kinetics of the process followed a pseudo-second order model and equilibrium fitted well to the Freundlich model.
Graphical abstract
HighlightsComposites based on kaolinite/metacrylate precursor's were prepared by in situ grafting and polymerization.Powder were obtained after ball milling the of polymer-clay composites.Composites were applied as adsorbents of methylene blue with higher adsorption capacity.Composites kaolinite-metacrylate present higher adsorption capacity than isolated polymers and kaolinite.
Kaolinite-polymer compounds by grafting of 2-hydroxyethyl methacrylate and 3-(trimethoxysilyl)propyl methacrylate
Ferreira, Breno F. (author) / Ciuffi, Katia J. (author) / Nassar, Eduardo J. (author) / Vicente, Miguel A. (author) / Trujillano, Raquel (author) / Rives, Vicente (author) / de Faria, Emerson H. (author)
Applied Clay Science ; 146 ; 526-534
2017-07-05
9 pages
Article (Journal)
Electronic Resource
English
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