Study On ATO@TiO₂/PVP Blended Conductive Fiber Prepared By Microfluidic Technology

With the development of science and technology,the smart textile market continues to expand.As an ideal carrier for smart wearable devices,clothing not only meets market demands for light weight,high flexibility,and conductive functions,but also has attracted widespread attention for flexible conductive fibers.Flexible conductive fiber is a new type of functional fiber with charge conductivity,which is made by mixing a conductive medium into the fiber-forming polymer matrix during the spinning process.In this paper,a combination of sol-gel method and hydrothermal method is used.Based on this,HBP-NH2 is used as a soft film to control the preparation of ultra-fine,large aspect ratio TiO2 nanowires.Antimony trichloride and tin tetrachloride are used.As a raw material,a wet chemical co-precipitation method was used to prepare a composite conductive powder of tin antimony oxide(ATO)coated TiO2 nanowires,and the conductive ATO@TiO2 nano powder was added to polyvinylpyrrolidone(PVP)spinning solution.Microfluidic technology was used to prepare ATO@TiO2/PVP blended conductive fibers with complete structure,uniform thickness and uniform arrangement.X-ray diffractometer,scanning electron microscope,transmission electron microscope and four-probe resistance tester were used to characterize their performance and structure.In order to obtain the required large aspect ratio TiO2 nanowires in this experiment,the process parameters such as hydrothermal temperature and NaOH addition were adjusted.A diameter of about 100 nm,a length of 6 to 10 μm,an aspect ratio of about 80,and a size were obtained.Uniform TiO2 nanowires.Under the condition that the molar ratio of Sb/Sn is 7%and the mass ratio of Sn/Ti is 20%,a complete conductive layer is stacked on the surface of the TiO2 nanowires,and an ATO with a resistivity of about 10 kQ·cm is obtained.TiO2 conductive filler.Finally,the test parameters were set as follows:the mass fraction of the ethanol solution of PVP was 15wt%,the advance rate of the syringe pump was 0.5 mL/h,the translation speed of the receiver was 4mm/min,the speed of the rotary motor was 200 r/min,and the amount of ATO@TiO2 filler was 4.5 Under this condition,ATO@TiO2/PVP blended conductive fiber with an average diameter of about 3 μm,uniform thickness,and almost no stickiness and entanglement with each other,and an average resistivity of about 70 kΩ·cm was spun under this condition.