New organic dye/anionic clay hybrid pigments: Preparation, optical properties and structural stability

摘要： Encapsulation and subsequent stabilization of organic dye into layered double hydroxides (LDHs) are investigated. Three commercialized dye molecules such as: acid orange 6, acid yellow 50 and acid green 25, were intercalated in Zn2-Al-LDH by co-precipitation method, analyzed by ICP and UV–Visible, and characterized by XRD at di?erent temperatures. Functionalized organic molecules have been interleaved for the synthesized hybrid LDH materials. It is shown that the e?ect of encapsulation is revealed by the di?erent interactions according to the molecule size and stacking of dye molecules. Thermal behavior of hybrid materials showed a clear enhancement of the structural stability in temperature over the chloride-Zn2Al LDH, indicating that the assembly may appear as a mutual bene?t.