静电纺丝技术制备NiO@Al_2O_3@TiO_2同轴三层亚微米电缆及其形成机理

Synthesis and Formation Mechanism of NiO@Al_2O_3@TiO_2 Coaxial Trilayered Submicrocables by Electrospinning

采用静电纺丝技术制备了[Ni(CH3COO)2+PVP]@[Al(NO3)3+PVP]@[Ti(OC4H9)4+CH3COOH+PVP]前驱体复合电缆,将其进行热处理后,制得了NiO@Al2O3@TiO2同轴三层亚微米电缆.采用热重-差热(TG-DTA)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、X射线能量色散谱(EDS)、能量色散型X射线荧光光谱(EDX)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术对样品进行了表征.结果表明,所得产物为NiO@Al2O3@TiO2同轴三层亚微米电缆.亚微米电缆芯层为NiO,直径约135～140 nm;中间层为Al2O3,厚度约215～220 nm;壳层为TiO2,厚度约155～160 nm.对NiO@Al2O3@TiO2同轴三层亚微米电缆的形成机理进行了探讨.

[Ni（CH3COO）2＋PVP]@[Al（NO3）3＋PVP]@[Ti（OC4H9）4＋CH3COOH＋PVP] composite cables have been fabricated through modified electrospinning equipment via electrospinning technique.NiO@Al2O3@TiO2 coaxial trilayered submicrocables were obtained by calcination of the relevant composite cables.The samples were characterized by TG-DTA,XRD,FTIR,EDS,EDX,SEM and TEM.Results show that the samples are NiO@Al2O3@TiO2 coaxial trilayered submicrocables.The diameter of core layer is ca.135—140 nm.The thickness of middle layer is ca.215—220 nm.The thickness of outer layer is ca.155—160 nm.Formation mechanism of NiO@Al2O3@TiO2 coaxial trilayered submicrocables was preliminarily proposed.