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采用同轴静电纺丝技术,以硝酸铝、正硅酸乙酯、无水乙醇、聚乙烯吡咯烷酮和N,N-二甲基甲酰胺为原料,成功制备了Al2O3/SiO2同轴超微电缆。用差热-热重分析、X射线衍射、扫描电镜、透射电镜、Fourier变换红外光谱对样品进行了表征。结果表明:所得到的产物为Al2O3/SiO2同轴超微电缆,以无定型SiO2为壳层,晶态Al2O3为芯轴,电缆直径在150～300nm之间,壳层厚度为50nm,电缆长度>450μm。对Al2O3/SiO同轴超微电缆的形成机理进行了分析。
Al 2 O 3 / SiO 2 coaxial ultra-fine cables were successfully prepared by coaxial electrospinning using aluminum nitrate, tetraethylorthosilicate, anhydrous ethanol, polyvinylpyrrolidone and N, N-dimethylformamide as raw materials. The samples were characterized by DTA - TG, XRD, SEM, TEM and Fourier transform infrared spectroscopy. The results show that the obtained product is Al2O3 / SiO2 coaxial ultra-miniature cable with amorphous SiO2 as the shell and crystalline Al2O3 as the mandrel. The diameter of the cable is between 150 and 300 nm, the thickness of the shell is 50 nm, the length of the cable is> 450 μm. The formation mechanism of Al2O3 / SiO coaxial ultra-small cable was analyzed.