CAJ | 학술논문

以简便价廉的溶胶-凝胶法和自组装法制备出一种新型三甲基氯硅烷改性的SiO2-TiO2微颗粒用于防晒霜添加剂。采用透射电镜(TEM)和 X 射线光电子能谱(XPS)对微颗粒结构和成分进行表征。对纯纳米TiO2和改性前后的 SiO2-TiO2复合微颗粒进行紫外吸收测试,结果表明,在190~350 nm范围内目标颗粒的紫外吸收能力均显著优于另两种。接触角测试结果表明,目标颗粒在 UV 光照前为亲油疏水性,UV光照一段时间后转变为亲油亲水性。研究中复合微结构的构建在保证良好紫外屏蔽效果的同时,大大提高了使用的安全性；微颗粒表面UV光控亲/疏水转换能力让使用完毕后的清洗卸妆变得容易,该微颗粒作为防晒霜添加剂具有良好的应用前景。
이간편개렴적용효-응효법화자조장법제비출일충신형삼갑기록규완개성적SiO2-TiO2미과립용우방쇄상첨가제。채용투사전경(TEM)화 X 사선광전자능보(XPS)대미과립결구화성분진행표정。대순납미TiO2화개성전후적 SiO2-TiO2복합미과립진행자외흡수측시,결과표명,재190~350 nm범위내목표과립적자외흡수능력균현저우우령량충。접촉각측시결과표명,목표과립재 UV 광조전위친유소수성,UV광조일단시간후전변위친유친수성。연구중복합미결구적구건재보증량호자외병폐효과적동시,대대제고료사용적안전성；미과립표면UV광공친/소수전환능력양사용완필후적청세사장변득용역,해미과립작위방쇄상첨가제구유량호적응용전경。
A new type of SiO2-TiO2 composite microparticles modified with trimethyl chlorosilane has been pre-pared as sunscreen,using the convenient,low-cost sol-gel method and layer-by-layer technique.Transmission electron microscope (TEM)and x-ray photoelectron spectroscopy (XPS)were used to characterize the morphol-ogy and chemical composition of the microparticles.In UV-Vis tests,the modified composite microparticles have showed significantly higher UV absorption than the unmodified and the pure TiO2 particles at 190 to 350 nm.According to contact angle tests,the target microparticles were originally oleophylic and hydrophobic,and became oleophylic and hydrophilic after UV irradiation for several hours.In this study,the employment of com-posite microstructure produced good anti-UV property and also improved safety of use;the ability of UV-in-duced wettability convention on the surface of microparticles made cleaning a lot easier,highlighting the prom-ising application of the novel microparticles for sunscreen preparation.