Electrospinning Method To Prepare Functionalized Conductive Fiber And Its Application Research

Nanomaterials have become a hot research topic in the field of high-performance materials because of their unique properties which is different from conventional materials.Electrospinning is a simple and fast method for preparing uniform and continuous one-dimensional nanostructured materials on a large scale.And it has attracted extensive attention due to its fast and efficient preparation of nanofibers.With the development of flexible electronics,materials science and micro-nano processing technology,flexible/wearable electronic technology has become an important field of electronic device research in recent years.Among them,high-performance flexible ductile sensors capable of accurately sensing external signals are one of the basic core components.Conductive polymer fiber-based electronic devices enable materials to show high tensile properties and flexibility while exhibiting good electrical conductivity,thereby breaking the boundaries of the properties of conductive polymers or conductive carbon materials,making them a wider range of applications.Flexible electronic materials and further exploration of their applications in flexible electronics and smart fabrics.The main research content of this thesis consists of two parts,electrical nanofibers as sensors and invisible wires.The first is about a stress sensor based on electrospun polyaniline/thermoplastic polyurethane(PANI/TPU)composite nanofiber membrane.Based on the large specific surface area of the nanofiber membrane,the conductive polymer material polyaniline is more uniformly and densely distributed on the surface of the fiber to exhibit high sensitivity,and the strain coefficient is as high as 6.7252,and the sensor has the characteristics of fast response and long durability.Due to its simple preparation method and excellent performance,it has potential application value in the field of wearable devices.In addition,we introduce a composite polyimides nanofiber strand and explore its application in the wearable electronics field.In this work,twisted CNTs/PI fibers with high conductivity,thermal stability and good flexibility were successfully prepared by adsorbing carbon nanotubes(CNTs)on the surface of polyimide(PI)nanofibers.The CNTs/PI fibers have an enhanced mechanical strength(~116.2 MPa,stretched to 16.7%)compared to pure PI fibers(~93.5 MPa).The prepared CNTs/PI fibers were able to maintain a stable morphology at a temperature of 400 °C.In addition,functionally twisted CNTs/PI strands have similar properties to those of ordinary lines,making them useful as potential applications for invisible flexible lines in future smart apparel.