氧化锌黄芩苷紫外屏蔽复合材料的制备与研究
Preparation and study of zinc oxide baicalin ultraviolet shielding composite material
余瑶瑶 1孙晓敏 1吴鑫 1蔡悦 1左士祥 2姚超1
作者信息
- 1. 常州大学石油化工学院,江苏 常州 213164
- 2. 常州纳欧新材料科技有限公司,江苏 常州 213164
- 折叠
摘要
将正硅酸乙酯在pH=8～10 的条件下水解形成的SiO2 包覆于纳米ZnO的表面制备SiO2/ZnO复合材料,以降低纳米ZnO的光活性.将天然药物黄芩苷(BA)包覆在SiO2/ZnO表面制得BA/SiO2/ZnO复合材料,使其兼具紫外屏蔽性能和抗氧化功效.通过Zeta电位、TEM、UV-Vis、FT-IR、TG和XRD等方法对制得的材料进行表征.结果表明,SiO2 以Si—O—Zn键的形式结合在纳米ZnO表面,适宜包覆量为20%;药物BA是以无定型的形式包覆在SiO2/ZnO表面,最佳包覆量为20%.抗氧化性实验结果表明,BA/SiO2/ZnO复合材料对DPPH自由基和·OH自由基的清除率与维生素C接近.防晒性能测试结果表明,BA/SiO2/ZnO复合材料具有优异的紫外屏蔽能力.
Abstract
SiO2 formed by the hydrolysis of ethyl orthosilicate at pH=8-10 is coated on the surface of ZnO nanoparticles to prepare SiO2/ZnO composites to reduce the photoactivity of ZnO nanoparticles.BA/SiO2/ZnO composites are prepared through coating natural drug baicalin(BA)on the surface of SiO2/ZnO,which gains both UV shielding properties and antioxidant efficacy.The fabricated composites are characterized by means of zeta potential,TEM,UV-Vis,FT-IR,TG and XRD.Results show that SiO2 is bonded in the form of Si-O-Zn bonds on the surface of nano ZnO,and the suitable coating amount is 20%.Baicalin,in the form of an amorphous form,is coated on the surface of SiO2/ZnO,and the optimal coating amount is 20%.Antioxidant experiments show that BA/SiO2/ZnO composites have similar scavenging rates for DPPH radical and·OH radical to vitamin C.Sunscreen performance tests show that BA/SiO2/ZnO composites exhibit excellent UV shielding ability.
关键词
纳米氧化锌/二氧化硅/黄芩苷/自由基清除能力/防晒指数Key words
nano-ZnO/silica/baicalin/free radical scavenging capacity/sunscreen index引用本文复制引用
基金项目
常州市科技支撑计划(CE20215031)
江苏省重点研发项目(BE2023747)
出版年
2024
NETL
NSTL
万方数据