Synthetize, Characterization And Electrochromism Of Poly(N-Hydroxyethylaniline)

Electrochromic material is considered to be the most promising intelligent materials in21st century. Polyaniline (PAN) as the Electrochromic conductive polymer has received much attention due to its conductivity, electrochemical activity, electrochromism,easy source of other materials and good stability.PANI has also been used in many areas and the theory has already very in-depth. However, there have sometimes been limited due to its poor fusibility and solubility in common organic solvents. Many research efforts have been devoted to enhance the fusibility and solubility of polyaniline in common solvents. In addition, the additional substituents of aniline derivatives are responsible for changed conductivity, chemical or electrochemical reactivity, stability versus environmental attack, etc. The replacement of the N-hydrogen of PAN base through acylation and alkylation has also been proven to be a practical way to prepare soluble PAN by interrupting the hydrogen bonding. In this paper, we prepared N-hydroxy ethyl aniline by the electrochemical method and chemical method and investigated its properties also. So it provides theory basis For preparation and performance of N-instead of polyaniline.In this paper, we synthesized poly N-hydroxyethyl aniline by cyclic voltammetry and electrolysis at constant potential in acid solution. Through discuss the influence effect of morphology and the electrochemical activity to poly N-hydroxyethyl aniline as the kinds of acid, inorganic acid such as perchloric acid nitric acid, sulphuric acid, hydrochloric acid and organic acid such as Amino sulfonic acid sulfonylurea salicylic acid, p-toluene sulfonic acid camphor sulfonic acid, concentration of acid, concentration of Monomer, sweep speed, sweep mode, Voltage HI Limit etc. demonstrating that the property of film forming in inorganic acid is better that organic acid. And perchloric acid is best.Poly(N-hydroxyethylaniline)(PNAN) was prepared by chemical oxidation with ammonium persulfate ((NH4)2S2O8). In1.0M aqueous inorganic acid and organic acid stir and keep at0℃for12h. PNAN was filtered and washed several times, The powder was dopant PNAN. Some of the powder was added into excessive ammonia solution (1.0M) for24h. The undoped PNAN was obtained. Filtered and then it was washed several times with water and alcohol, both of the two states of PNAN was placed under vacuum till they were constant weight.It researched the electrochromism of PANA synthesized by Chemical Method and electrochemical method. The Structure characterization and performance of PANA are characterized by means of Scanning electronic microscope (SEM), Transmission electronic microscope (TEM), Fourier transform (FT-1R), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC), ultraviolet spectrometer (UV), X-ray diffraction spectrometer (XRD), solubility and cyclical stability. The analysis results indicate that PANA has better electrochromism and reversible cyclical stability obtained by two Process of Polymerization. well distributed particle size, Spherical or scales, stabilization to heat and can satisfy the normal demands for the electrochromism material. The polymer have two kinds of forms are amorphous state and amorphous state. The polymer is head-to head coupling polymerization at the C-4and N position, acid radical ion of doping is effective.