Preparation Of Pan Based Conductive Fiber,Micronano PANI And Corresponding Research For Their Potential Performance

With the increasing seriousness of water pollution and energy shortage problems,people start to explore effective ways to solve such these issues.Among them,the semiconductor photocatalytic degradation technology has been widely used because of its unique advantages such as removing contaminant completely,no secondary pollution and moderate reaction conditions.Moreover,loading the photocatalytic activity materials on the textile to fabricate multifunctional fiber with both excellent catalytic activity and mechanical properties is a promising research direction in the future industrial application.In view of the energy shortage items,recently,energy storage technology has attracted much attention in our country except for exploiting new energy.Electro-chemical capacitor,as a new type of energy storage device has attracted numerous scientific researchers due to its great potentials in term of the low carbon economy.This paper is mainly about synthesising PAN@CuS,PAN@CuS@Ni₃S₄ functional fabrics which used the polyacrylonitrile fiber as matrix by chemical chelation,solvothermal method.Moreover,the as prepared products were characterized by SEM,XRD,and FTIR techniques.Then the corresponding photocatalytic property was also studied by removing contaminant in waste water.In addition,the nano polyaniline?PANI?fiber was synthesized by electrodeposition,and its electrochemical performance was also evaluated by cyclic voltammetry?CV?,galvanostatic chargeedischarge?GCD?and electrochemical impedance spectroscopy?EIS?.The main contents of this paper are as follows:?1?Utilize chemical chelation method to fabricate conductive PAN fiber.The followings are optimized reaction conditions: the concentration of complexing agent is 5 mg/ml,temperature is 95?,reaction time is 135 min and the concentration of CuSO₄ is 25 mg/ml.During the tensile test,the increased concentration of CuSO₄ lead a decline trend in PAN conductive fiber tensile strength.While when the amount of CuSO₄ is low,the tensile strength of as prepared products would be enhanced with the increasing concentration of complexing agent.?2?The PAN@CuS@Ni₃S₄ hybrid catalyst was successfully synthesized by a facile solvothermal method.From the XRD result,the characteristic diffraction peak of PAN slightly decreased,estimating the disorientation of PAN fiber during the solvothermal process.And the SEM and Mapping results shows that the high density of copper sulfide thin layer uniformly loads on PAN fiber surface.While after the introduction of nickel sulfide,the microstructure of PAN fiber surface transferred to well-organized pineapple-like heterojunction structure.From the degradation results,compared with the pure PAN fiber and PAN@ CuS,the PAN@CuS@Ni₃S₄ exhibits much more excellent photocatalytic degradation performance because of its unique structure.After 4 h UV irradiation,the degradation efficiency is 97%.Moreover,after five recycled tests,the PAN fiber surface structure have no obvious structure collapse phenomenon,and still keep 90% of the catalytic degradation efficiency.?3?Choose electrodeposition method to synthesis micronano polyaniline.From the SEM,XRD and FTIR results,PANI-H₂SO₄ shows coral-like micronano structure,PANI-CSA exhibits 3D skeleton structure and PANI-H₃PO₄ presents similar coral-like microstructure to PANI-H₂SO₄,but the diameter of PANI rod is slightly larger than PANI-H₂SO₄.Moreover,PANI-CSA exhibits much more excellent electrochemical performance than other two materials.During the CV measurement test the shape of the curve does not severely change at the scanning speed of 50 mV/s,demonstrating the good capacitance.And after calculation,the discharge specific capacity is 321 F/g at the current density of 0.5 A/g.What is more,when the current density increased to 5 A/g,the specific capacity could be also kept about 220 F/g.Additionally,after1000 cycles capacity at the current density of 0.5 A/g,the discharge specific capacity retention is still as high as 95% exhibiting excellent electrochemical performance.