Synthesis,characterization and UV absorb of p-aminobenzoic acid LDHs

p-Aminobenzoic acid was controlled intercalated into magnesium aluminum layered double hydroxides (LDHs) by using co-precipitation, ion-exchange and calcine-recovering. Supramolecular structure of the p-aminobenzoic acid pillared hydrotalcite was characterized by XRD, FTIR, TG-DSC, SEM. Experimental results show that interlayer spacings of p-aminobenzoic acid-LDHs are respectively 0.81 nm、0.79 nm、1.45 nm. The property of UV-absorb is related with the interlayer spacings of p-aminobenzoic acid pillared hydrotalcite. It suggests that p-aminobenzoic acid pillared hydroxides may have the application as a novel UV-absorbing reagent in cosmetics field.