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This paper reports the preparation of novel polymer membranes by phase inversion at room temperature (25 пїЅC), using acrylonitrile, acrylic acid, dimethyl sulfoxide and small amount of medicinal plant extract. We investigated the structure of the resulting membranes through Fourier Transform Infrared (FT-IR) spectroscopy and SEM microscopy. Also was determined the water content. FTIR-ATR spectra show that the peak at 1723 cm-1 shifted to lower wave number when medicinal plant extract (1715 cm-1) is added in the p...

In the present work, polymer-silica hybrid latexes based on methyl methacrylate (MMA), butyl acrylate (BuA), 2-hydroxyethyl methacrylate (HEMA), and different inorganic precursors (tetraethoxysilane (TEOS), isobutyltriethoxysilane (IBTES), diethoxydimethylsilane (DEDMS), vinyltriethoxysilane (VTES)) were synthesized by emulsion polymerization and sol-gel process. The resulting latexes were characterized both as materials placed into plastic vials and as films deposited onto clean glass slides by various techniques...

This paper reports the synthesis of hybrid zirconium sol-gel coatings by solпїЅgel process at room temperature (25 пїЅC), using tetraethoxysilane (TEOS) as a precursor and different alkyltriethoxysilanes (RTES) with variable organic functionality (methyl, vinyl and octyl) as surface modifying agents. All silica materials was prepared with zirconium(IV) propoxide (as cross-linking agent), by keeping the molar ratio of TEOS:RTES at 1:1, in acidic conditions. The zirconium sol-gel films were obtained by depositing th...