期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 107, 期 -, 页码 62-67出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2017.02.018
关键词
Layered double hydroxides; Cinnamic acid; UV blocking; Sunscreen cream
资金
- National Natural Science Foundation of China [21301012]
- China Cosmetic Collaborative Innovation Center
- Open Research Fund Program of Beijing Key Lab of Plant Resource Research and Development
- BTBU [PRRD-2016-YB5]
- Development of High-Caliber Talents Project of Beijing Municipal Institutions [CIT TCD 201504009]
The use of sunscreen is recently growing and their efficacy and safety must be taken into account since they are applied on the skin frequently. In this work, an organic ultraviolet (UV) ray absorbent, cinnamic acid (CA) was intercalated into Zn-Ti layered double hydroxide (LDH) by anion-exchange reaction. ZnTi-CA-LDH, a new type of host-guest UV-blocking material has been synthesized. Detailed structural and surface morphology of ZnTiCA-LDH were characterized by XRD, FT-IR, SEM and TEM. ZnTi-CA-LDH exhibits a superior UV blocking ability compared to pure CA and ZnTi-CO3-LDH. The thermal stability of the intercalated ZnTi-CA-LDH was investigated by TG-DTA, which showed that the thermostability of CA was markedly enhanced after intercalation into ZnTi-CO3-LDH. The EPR data showed greatly decreased photocatalytic activity compared to common inorganic UV blocking agents TiO2 and ZnO. Furthermore, the sample was formulated in a sunscreen cream to study the matrix protective effect towards UT rays.
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