超分子结构MgAl-HMBA-LDHs的组装及其紫外阻隔性能研究

SYNTHESIS AND UV INHIBITION PROPERTY OF MgAL-HMBA-LDHs

以MgAl-NO3-LDHs为前驱体,采用离子交换法成功地将2-羟基-4-甲氧基二苯甲酮-5-磺酸(HMBA)阴离子插层到MgAl-NO3-LDHs层间,借助SEM、XRD、FT-IR、TG-DTA和UV-Vis等手段对样品进行了表征。结果表明,HMBA阴离子可完全取代前驱体层间的NO3-离子,并且与主体层板产生较强的超分子相互作用。MgAl-HMBA-LDHs的紫外吸收性能较HMBA客体增强,热稳定性明显提高。将MgAl-HMBA-LDHs加入至玻璃钢基体中,明显提高了玻璃钢基体的耐紫外光老化性能。

2-hydroxy-4-methoxybenzophenone-5-sulfonic acid had been intercalated into a layered double hydroxides （LDHs） host by ion-exchange reaction using MgA1-NO3-LDHs as precursor. The samples obtained were characterized by SEM, XRD, FT-IR, TG-DTA and UV-Vis. The results show that the original interlayer nitrate anions of LDHs precursor can be completely replaced by HMBA anions. FT-IR and TG-DTA curves reveal the presence of a complex system of supramoleeular host-guest interactions. With fairly good thermal stability, MgA1-HMBA-LDHs can absorb UV radiation more effectively. The photostability of FRP matrix modified by MgA1-HMBA-LDHs is en- hanced comparing with the pristine FRP matrix or FRP matrix modified by HMBA.