PREPARATION OF NEW USEFUL MATERIALS BY SURFACE MODIFICATION OF INORGANIC LAYERED COMPOUND

We have obtained water-treated Zn-Al layered double hydroxides (LDHs) that were covered by hydroxyl groups between the layers. By reaction o f the water-treated Zn-Al LDH with oxychloride, the surface modificati on of the Zn-Al LDH by esterification was attained. The reaction produ cts were characterized by X-ray diffraction measurements and thermal a nalysis, and the esterification reaction was confirmed by an IR spectr um in which the peak intensity at 3400 cm(-1) decreased and a new peak at 1550 cm(-1) appeared. Interlayer spacing of the LDH increased by t he esterification reaction. The esterified LDHs obtained in this work were hydrophobic. (C) 1995 Academic Press, Inc.