对氨基苯甲酸插层镁铝水滑石的合成、表征及紫外吸收性能

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

摘要: 以微波结晶法制备的碳酸根型镁铝水滑石(LDHs)为前体, 对氨基苯甲酸为客体, 由水热法、离子交换法、焙烧复原法三种方法组装合成了对氨基苯甲酸插层镁铝水滑石复合材料。并用XRD、FTIR、TG-DSC、SEM等对其结构进行表征。结果表明: 各种方法均能合成相应的插层水滑石层柱材料, 层间距分别扩大为0.81 nm、0.79 nm、1.45 nm。三种合成材料的紫外吸收强弱与对氨基苯甲酸插层水滑石分子后的层间距大小有关。该研究指出对氨基苯甲酸插层水滑石作为一种紫外吸收层柱材料在化妆品领域具有应用潜力。

Abstract: 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.