Electrospinning Method To Prepare Photoelectric Temperature-adjustable And Energy-storing Composite Fiber And Its Performance

Energy issues have always been a major concern.As the energy crisis has intensified,scientists have turned their attention to new energy alternatives to traditional energy sources and are committed to developing new energy storage materials.Phase change composite materials play an important role in energy conservation and environmental protection.The phase change latent heat of phase change composite materials is used to realize the storage and release of energy,and the energy saving can be achieved while adjusting the ambient temperature and its structure.This process is not polluted.In this paper,polyacrylonitrile?PAN?was used as the carrier matrix,and ruthenium-polyethylene glycol?Eu-PEG?and ruthenium-polyethylene glycol?Tb-PEG?were used as phase change fluorescent materials,and doped conductive polyaniline was added.PANI),Tb-PEG+Eu-PEG/PANI/PAN composite fibers were prepared by electrospinning.The performance of phase-change fluorescent conductive composite fibers was analyzed by scanning electron microscopy?SEM?,fluorescence spectrometer?FL?,differential scanning calorimetry?DSC?and broadband dielectric relaxation spectrometer?BDS?.The results show that the composite fiber has good fluorescence,phase transformation and electrical conductivity.Under the excitation of 294 nm ultraviolet light,the luminescence intensity and color of the composite fiber can be adjusted by adjusting the mass ratio of Tb-PEG and Eu-PEG by adjusting the ratio of Tb-PEG,Eu-PEG and PANI,and the molecular weight of PEG.Controllable adjustment of fluorescence,conductivity and phase change properties of the composite fiber can be achieved.PVDF is a new type of piezoelectric material.Its constituent unit is CH₂=CF₂.It is a long-chain polymer material.There are four kinds of crystal forms that have been measured,among which the?-crystal has the best piezoelectric performance.In this paper,we want to prepare fibers and films with piezoelectric function through experiments.In this paper,two methods are mainly used to obtain PVDF complexes with piezoelectric function.The obtained samples were characterized by infrared spectroscopy,DSC,scanning electron microscopy,atomic force microscopy and BDS test.The results show that the piezoelectric fibers with rare earth elements lanthanum and cerium are successfully prepared,and the morphology of the fibers is good.Piezoelectric function.