静电纺丝技术制备TiO_2@SiO_2空心橄榄状电缆

Preparation of TiO_2@SiO_2 with a Hollow Olive-shaped Cable by Electrospinning

采用同轴静电纺丝技术,以钛酸丁酯、正硅酸乙酯、聚乙烯吡咯烷酮、无水乙醇、芝麻油、山梨糖醇酐油酸酯和氯仿为原料,制备了具有橄榄形貌的TiO_2@SiO_2空心电缆。用X射线衍射、红外光谱仪、扫描电镜和透射电镜对样品进行了表征。结果表明,得到的产物为TiO_2@SiO_2空心橄榄状电缆,以非晶态SiO_2为外壳,晶态TiO_2为内壁,内壁厚约200nm、壳层厚约100nm,空心橄榄状电缆中部直径约1.4μm,末端直径约210nm,长度约5μm。并对其形成机理进行了分析。

TiO_2@SiO_2 hollow olive-shaped cables were successfully synthesized by coaxial electrospinning technique using tetrabutyl titanate, tetraethyl orthosilicate, polyvinyl pyrrolidone, absolute ethanol, sesame oil,span-80 and chloroform as starting materials. The samples were characterized by X-ray diffractometry(XRD), infrared spectrograph(FTIR),scanning electron microscopy(SEM) and transmission electron microscopy(TEM) techniques. The results indicated that the products are TiO_2@SiO_2 hollow olive-shaped cables with an amorphous SiO_2 outer shell, a crystalline TiO_2 inwall. The hollow olive-shaped cables possess thickness of inwall of ca. 200 nm and outer shell of ca. 100 nm, medi-diameter of ca. 1.4μm, erminal diameter of ca. 210 nm, length of ca. 5μm. The formation mechanism of the TiO_2@SiO_2 hollow olive-shaped cables is preliminarily investigated.