Linyan Zhang, Yanjun Lin, Zhenjun Tuo
Apr 1, 2007
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0
Influential Citations
35
Citations
Journal
Journal of Solid State Chemistry
Abstract
5-sulfosalicylic acid (SSA) anions have been intercalated into layered double hydroxides (LDHs) by an anion-exchange reaction using ZnAl-NO{sub 3}-LDHs as a precursor. The samples were characterized by XRD, FT-IR, TG-DTA/MS and UV-visible spectroscopy. The results show that the NO{sub 3} {sup -} anions in the precursor have been completely replaced by SSA anions to give ZnAl-SSA-LDHs having a high degree of crystallinity. Detailed studies reveal the existence of a supramolecular structure in ZnAl-SSA-LDHs involving electrostatic attraction between opposite charges, hydrogen bonding and other weak chemical bonding interactions between host layers and SSA anions. The thermal stability of ZnAl-SSA-LDHs is considerably enhanced compared with that of a mixture of ZnAl-NO{sub 3}-LDHs and SSA. After addition of 2.0 wt% ZnAl-SSA-LDHs to polypropylene (PP), the resistance of the polymer to UV degradation is significantly improved. - Graphical abstract: UV-visible absorbance curves of SSA (a), ZnAl-NO{sub 3}-LDHs precursor (b) and ZnAl-SSA-LDHs (c)