摘要
以ZnAl-NO3-LDHs为前体,采用离子交换法将2-苯基苯并咪唑-5-磺酸(PBSA)插入到ZnAl-NO3-LDHs层间,借助XRD、FTIR、TG-DTA和UV-Vis等手段对样品进行表征。结果表明,PBSA阴离子可以完全取代前体层间的NO3-离子,组装得到晶体结构良好的ZnAl-PBSA-LDHs。对其结构进行研究发现,ZnAl-PBSA-LDHs中存在主体与客体以及客体与客体之间的相互作用,具有超分子结构特征。ZnAl-PBSA-LDHs在350nm以下的紫外吸收能力较PBSA客体和ZnAl-NO3-LDHs前体显著增强,热稳定性也有所提高。将ZnAl-PBSA-LDHs以1.0%的质量比加入到聚丙烯(PP)中制备成ZnAl-PBSA-LDHs/PP薄膜,显著提高了PP的耐紫外光老化性能。
2-Phenylbenzimidazole-5-Sulfonic Acid （PBSA） anion intercalated LDHs of the type of Zn0.67Al0.33（OH）2 （C13H9N2O3S）0.33· 1.57H2O was assembled by ion exchange using Zn0.66, Al0.34 （OH）2 （NO3）0.34·0.75H2O as a precursor. The samples obtained were characterized by XRD, FTIR, TG-DTA and UV-Vis. The results show that the original interlayer nitrate anions of LDHs precursor can be completely replaced by PBSA anions. The interlayer distance in the LDHs increases from 0.89 to 2.16 nm. Infrared spectra and TG-DTA curves reveal the presence of a complex system of supramolecular host-guest and guest-guest interactions. The Zn0.67Al0.33（OH）2（C13H9N2O3S）0.33· 1.57H2O is with fairly good thermal stability and can absorb UV radiation more effectively, especially below 350 nm. The photostability of polypropylene film modified by Zn0.67Al0.33（OH）2（C13H9N2O3S）0.33·1.57H2O is enhanced comparing with the films of pristine polypropylene and polypropylene modified by PBSA.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第8期1431-1437,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金项目(No.20471006)
北京市教委产学研项目(No.CXY100100407)资助
关键词
紫外吸收剂
插层组装
水滑石
聚丙烯
光稳定性
UV absorbers
intercalation assembly
LDHs
polypropylene
photostability
