Effect of surfactant concentration on the stacking modes of organo-silylated layered double hydroxides

摘要: Abstract The effects of the surfactant concentration on structure, morphology and thermal property silylated hydrotalcites have been investigated. By in-situ coprecipitation, surfaces layered double hydroxides (LDHs) modified by using 3-aminopropyltriethoxysilane (APTS) anionic surfactant, Na-dodecylsulfate (SDS). Two different stacking modes in resultant materials were detected X-ray diffraction (XRD). One has an identical structure LDHs, which SDS APTS only bond to outside plate edges LDH. other is with enlarged interlayer distance, combined inside With increased loading APTS, surface LDH appeared rough as observed transmission electron microscopy (TEM) images. attenuated total reflection Fourier-transform infrared (ATR FTIR) spectra showed a series bands attributed –NH2 Si–O–M (M = Mg Al), proving that successfully grafted onto thermogravimetric curves (TG) silane samples less –OH water, result consumption during condensation reaction between Si–OH surface. These nanomaterials are potential applications including clay-based nanocomposites, adsorbents for removal organic contaminants from water flame retardant materials.