Electrospinning Construction Of Dual Anisotropic Electrically Conductive Janus Membranes Functionalized By Magnetism And Luminescence

Anisotropic conductive pellicles have been widely used in flexible electronic device,memorizer and displaying device due to their unique conductive properties.With the development of science and technology,it is required to develop new types of multi-functional anisotropic conductive pellicles.Therefore,it is a valuable project of research to design and construct anisotropic conductive pellicle functionalized by magnetism and fluorescence.The fluorescence,electrical conduction and magnetism of the fluorescent-conductive-magnetic polyfunctional material will be seriously affected if two or three kinds of fluorescent,conductive and magnetic substances are directly mixed.In order to reduce the detrimentally mutual effects among the performances of fluorescence,conduction and magnetism,we designed and constructed a new type of tricolor-shaped nanoribbon via electrospinning,and then the tricolor-shaped nanoribbon was used as the constructional unit and conductive unit to prepare three kinds of neoteric top-down structure di-anisotropic conductive Janus pellicle endowed with concurrent excellent fluorescence and magnetism.3D bi-wall tubes were obtained by rolling the 2D Janus pellicle.The specific details are summarized as following:（1）{[Eu（acac）₃bpy/polymethylmethacrylate（PMMA）]//PMMA //[polythiophene（PTh）/PMMA]}&{[Tb（acac）₃bpy/PMMA]//[PTh/PMMA]//[CoFe₂O₄ /PMMA]} di-anisotropic conductive Janus pellicle functionalized by red-green dual-colored fluorescence and magnetism;（2）{[Eu（acac）₃bpy/PMMA]//[PTh/PMMA] //[CoFe₂O₄/PMMA]}&{[Tb（acac）₃bpy/PMMA]//[PTh/PMMA]//[CoFe₂O₄/PMMA]} di-anisotropic conductive Janus-structural pellicle endowed with magnetism and red-green dual-colored fluorescence;（3）{[Y₂O₃:Yb³⁺,Er³⁺/PMMA]//[PTh/PMMA]//[Tb（acac）₃bpy /PMMA]}&{[（Eu（acac）₃bpy+Tb（acac）₃bpy）/PMMA]//[PTh/PMMA]//[CoFe₂O₄/PMMA]} di-anisotropic conductive Janus-typed pellicle affording up-and down-conversion fluorescence and magnetism.The samples were characterized in detail.The results show that the thickness of each layer of Janus pellicle is ca.300 μm.The Janus pellicles possess good di-anisotropic conduction,and the conductance ratio between conductive direction and insulative direction reaches ca.10⁹.Up-and down-conversion fluorescence,anisotropic conduction and magnetism of Janus pellicle can be modulated by adjusting the contents of Y₂O₃:Yb³⁺,Er³⁺ NPs,rare earth complexes,PTh and CoFe₂O₄ NPs.Janus pellicle with top-down structure realizes the macro partition,and the unique tricolor-shaped nanoribbon actualizes the microscopic division of three functional areas.The combination of the macro partition and the micro partition can effectively reduce detrimental reciprocal effects among the tri-functionalities of fluorescence,conduction and magnetism,as a result,the Janus pellicle with excellent multi-function of fluorescence,conduction and magnetism are successfully obtained.Furthermore,3D bi-wall tubes are fabricated by rolling the 2D Janus pellicle via different strategies,and the 3D bi-wall tubes also have good dual-colored fluorescence,di-anisotropic conduction and magnetism,indicating that the transformation from 2D Janus pellicle to 3D bi-wall tube is realized.The results obtained in this dissertation provide theoretical and technical support for designing and preparing new-typed anisotropic conductive materials with multifunctionality in the future.