Electrospinning Manufacture Of Aeolotropic Conductive Film Functionalized By Magnetism And Photoluminescence

The luminescent-conductive-magnetic multifunctionalization of materials is an effective way to realize the miniaturization,intelligentization,integration and multifunction of functional devices.When the three kinds of luminescent,conductive and magnetic substances are directly mixed together to prepare luminescent-conductive-magnetic multi-functional materials,adverse interactions among different functional substances will be caused.How to obtain one-dimensional nanomaterials with concurrent excellent luminescent-conductive-magnetic trifunction has become one of the frontier hot research fields in materials science.Presently,type II anisotropic conductive films（ACFs）have some disadvantages,such as small film area,complex preparation process,weak anisotropy degree,single function,etc,and they are usually made of polymer chains and nanofibers.Anisotropic conductive film has become one of the cutting-edge hot research topics in electronic industry.In this dissertation,detailed study on the two research hotspots of luminescent-conductive-magnetic multifunctional 1D nanomaterials and ACFs as well as their combinations are performed.One-dimensional tricolor flag-shaped nanobelt and tricolor flag-shaped nanofiber bundle are constructed by using the triaxial parallel electrospinning technology,and furthermore,magnetic-fluorescent functionalized anisotropic conductive film,photosensitive anisotropic conductive film and dual-anisotropic conductive film are fabricated by utilizing tricolor flag-shaped nanobelt and tricolor flag-shaped nanofiber bundle as conductive and building units.The morphology,structure,composition and properties of the composites are systematically studied.The details are as follows:1.By using the self-designed and manufactured spinning spinneret and spinning device,[Na YF₄:Yb³⁺,Tm³⁺/polymethylmethacrylate（PMMA）]//[polyaniline（PANI）/PMMA]//[Co Fe₂O₄/PMMA]tricolor flag-shaped nanobelt is designed and prepared by applying triaxial parallel electrospinning technology.Partition of three functional regions is realized in the tricolor flag-shaped nanobelt,and luminescent,conductive and magnetic materials are limited in their own independent regions,and thus,the adverse mutual interferences among them is markedly reduced.As a result,high integration of the excellent luminescent-conductive-magnetic multifunctional properties with the one-dimensional nanostructure is successfully actualized.The formative mechanism of tricolor flag-shaped nanobelt is expounded,and new construction technology is established.2.By utilizing[Na YF₄:Yb³⁺,Tm³⁺/PMMA]//[PANI/PMMA]//[Co Fe₂O₄/PMMA]tricolor flag-shaped nanobelt as conductive and building unit,the fluorescent-magnetic-anisotropic conductive tricolor flag-shaped nanobelt array is constructed.Due to introduction of two independent parts in the width direction of the tricolor flag-shaped nanobelt,the insulation in the insulating direction is increased,which makes the array film have high anisotropic conductivity and affords the array film with luminescence and magnetism.By adjusting the contents of Na YF₄:Yb³⁺,Tm³⁺NPs,PANI and Co Fe₂O₄ NPs,the array can obtain adjustable up-conversion fluorescence,anisotropic conductivity and magnetism.3D tubes and 3D+2D complete banner-typed structures manufactured by different strategies of crimping array film have excellent fluorescent-conductive-magnetic versatility.3.Inspired by tricolor flag-shaped nanobelt,tricolor flag-shaped nanofiber bundle is used as conductive and building unit for the first time,and 2,7-dibromo-9-fluorenone（FL）with photoconductive and luminescent properties is used as photoconductive and luminescent material to construct[Na YF₄:Yb³⁺,Tm³⁺/polyvinylidene fluoride（PVDF）]//[FL/PVDF]//[Co Fe₂O₄/PVDF]photosensitive tricolor flag-shaped nanofiber bundle array.Under light illumination,because fluorenone is conductive,the array film has high conductive anisotropy,fluorescence and magnetism.In the absence of light irradiation,there is only fluorescence and magnetism.Therefore,the function transformation is realized through control of light illumination.3D tubes and 3D+2D complete banner-typed structures manufactured by different strategies to crimp the array film have excellent versatility.A new concept of photosensitive anisotropic conductive film is proposed,which plays an important role in promoting the development of conductive film field.4.With the help of secondary triaxial parallel electrospinning technology,{[Na YF₄:Yb³⁺,Er³⁺/PMMA]//[PMMA]//[PANI/PMMA]}⊥{[Dy（BA）₃phen+Eu（acac）₃bipy/PMMA]//[Co Fe₂O₄/PMMA]//[PANI/PMMA]}dual-anisotropic conductive left-right structured Janus film is constructed,and the Janus film is concurrently endowed with adjustable magnetism and color-tuned fluorescence.The high integration of the array film with dual-anisotropic conductive-magnetic-fluorescent tri-functional characteristics is realized.The micro and macro partition are integrated in the film to achieve excellent fluorescent-conductive-magnetic trifunctional characteristics.3D Janus tubes and 3D+2D complete banner-typed structures obtained by different curling strategies to roll the Janus film present very novel and unique properties,which provide new materials for the development of nanotechnology.