SiO_2-KH550/TiO_2防晒剂的制备与性能研究
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摘要
以金红石型TiO_2为载体、KH550为偶联剂,采用无机包覆和有机接枝相结合的改性方法,制备出一种防晒纳米材料SiO_2-KH550/TiO_2,并考察其亲水、亲油和光催化性能.结果表明:SiO2-KH550/TiO_2具有良好的亲油性,能较好地分散在油相中,稳定性良好;降解反应6 h后,亚甲基蓝降解率仅为17%,TiO_2光催化活性明显降低.该材料可解决TiO_2在油相体系防晒化妆品中易分离、易沉降的问题,避免产品在使用过程中因TiO_2的光催化活性对表皮细胞的损伤.
A sunscreen nanomaterial SiO_2-KH550/TiO_2 was prepared by using rutile TiO_2 as carrier and KH550 as coupling agent by inorganic coating and organic grafting. Its hydrophilic,lipophilic and photocatalytic properties were investigated. The results showed that SiO2-KH550/TiO_2 had good lipophilicity and could be well dispersed in the oil phase with good stability. After 6 h photodegradation,the degradation rate of methylene blue was only 17%,and the photocatalytic activity of TiO_2 was obviously reduced. The material could solve the problem that TiO_2 was easy to separate and settle in the oil phase system sunscreen cosmetics,and avoided the damage of epidermal cells caused by the photocatalytic activity of TiO_2 during the use of the product.
A sunscreen nanomaterial SiO_2-KH550/TiO_2 was prepared by using rutile TiO_2 as carrier and KH550 as coupling agent by inorganic coating and organic grafting. Its hydrophilic,lipophilic and photocatalytic properties were investigated. The results showed that SiO2-KH550/TiO_2 had good lipophilicity and could be well dispersed in the oil phase with good stability. After 6 h photodegradation,the degradation rate of methylene blue was only 17%,and the photocatalytic activity of TiO_2 was obviously reduced. The material could solve the problem that TiO_2 was easy to separate and settle in the oil phase system sunscreen cosmetics,and avoided the damage of epidermal cells caused by the photocatalytic activity of TiO_2 during the use of the product.
引文
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[4] BETTLER C R,JACOBSON H W,BALOGA M R,et al. Improved titanium dioxide pigment coated with boria-modified silica and alumina:WO 96/15197[P]. 1996-05-23.
[5] ZHOU H,LI K,LI H,et al. Ti O2pigment and the preparation method:200510122928. 8[P].2005-12-05.
[6]刘于民.二氧化钛表面功能化及应用研究[D].镇江:江苏大学,2011.
[7] LI Z J,HOU B,XU Y,et al. Comparative study of sol-gel-hydrothermal and sol-gel synthesis of titania-silica composite nanoparticles[J]. Journal of Solid State Chemistry,2005,178(5):1395.
[8] YAO C,GAO G S,LIN X P,et al. Surface modification of nanosized Ti O2with silane coupling reagent[J]. Journal of Inorganic Materials,2006,21(2):315.
[9] LI X G. Structure and properties of wet modified titanium dioxide with silane coupling agent KH-570[J]. Adhesion in China,2012(9):39.
[10]邝琳娜,周大利,刘舒,等. Ti O2表面致密包覆Si O2膜研究[J].四川有色金属,2014(2):41.