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首页> 外文期刊>Polymer Degradation and Stability >Synthesis and UV absorption properties of 5, 5'-thiodisalicylic acid intercalated Zn-Al layered double hydroxides
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Synthesis and UV absorption properties of 5, 5'-thiodisalicylic acid intercalated Zn-Al layered double hydroxides

机译：5，5'-硫代二水杨酸插层Zn-Al层状双氢氧化物的合成及紫外吸收性能

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摘要

5, 5'-Thiodisalicylic acid (TDSA) has been intercalated into a ZnAl-NO_3 layered double hydroxide (LDH) by an ion-exchange reaction. After intercalation of TDSA, the basal spacing in the LDH increased from 0.89 to 1.53 nm, suggesting that the TDSA anions were arranged in the interlayer galleries of ZnAl-TDSA-LDH as a tilted monolayer arrangement of dianions. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry and differential thermal analysis (TGA-DTA), and UV-Visible spectroscopy (UV-Vis). The results show that the NO_3~- anions in the precursor have been completely replaced by TDSA anions to give ZnAl-TDSA-LDH having crystalline-layered structure. Detailed studies reveal the presence of a complex system of supramolecular interactions between LDH layers and TDSA anions. TGA-DTA curves suggest that the thermostability of TDSA was markedly enhanced by intercalation in the LDH host. Photostability tests show that the film of ZnAl-TDSA-LDH/PP possessed higher stability to UV radiation than either the film of TDSA/PP or pristine PP.
机译：在图5中，通过离子交换反应将5'-硫代二水杨酸（TDSA）插入到ZnAl-NO_3层状双氢氧化物（LDH）中。插入TDSA后，LDH中的基本间距从0.89 nm增加到1.53 nm，这表明TDSA阴离子以倾斜的单层阴离子排列在ZnAl-TDSA-LDH的层间画廊中。样品通过X射线衍射（XRD），傅立叶变换红外光谱（FT-IR），热重分析和差热分析（​​TGA-DTA）和紫外可见光谱（UV-Vis）进行表征。结果表明，前驱体中的NO_3〜-阴离子已被TDSA阴离子完全取代，得到具有晶体层状结构的ZnAl-TDSA-LDH。详细的研究表明，LDH层和TDSA阴离子之间存在超分子相互作用的复杂系统。 TGA-DTA曲线表明，通过插入LDH宿主，TDSA的热稳定性显着增强。光稳定性测试表明，ZnAl-TDSA-LDH / PP膜比TDSA / PP膜或原始PP膜对紫外线辐射具有更高的稳定性。

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