In order to improve the ultraviolet shielding ability of nano TiO2,reduce its photocatalytic activity,rutile TiO2 was supported in-situ on the surface of mica and modified with inorganic Al(OH)3 and disodium stearyl glutamate (HS-21P).Mica/TiO2/Al(OH)3/HS-21P (MTAH) UV shielding material was prepared.TEM and SEM analysis showed that the nano-TiO2 was uniformly supported on the surface of the mica.Photocatalytic performance tests shown that the coating of inorganic Al(OH)3 effectively reduced the photocatalytic activity of nano-TiO2.The FT-IR,TG and water contact angle analysis showed that the organic HS-21P surface treatment agent made the water contact angle of the composite powder reached 121°,improving its compatibility with organic solvents.The MTAH composite powder and the commercially available TiO2 were added to the sunscreen formulation with the same amount of the active substance added,and the formula sunscreen performance,stability and the like were examined.The results showed that MTAH had better stability,UV shielding effect (SPF value of 13.81,PA++ when the formulation contained 5% TiO2).
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基金资助
国家自然科学基金-青年基金(51702026);江苏省六大人才高峰”第十三批创新人才团队项目(XCL-CXTD-029);产业前瞻与共性关键技术——竞争项目(BE2017064)
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