Dissertation > Excellent graduate degree dissertation topics show

Study on Preparation and Performance of Polyaniline/Carbon Nanotube Composites

Author: LiDanDan
Tutor: RenLi
School: Hebei University of Technology
Course: Polymer Chemistry and Physics
Keywords: polyaniline carbon nanotube composites conductivity chemical oxidative polymerization electrochemical polymerization
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 122
Quote: 0
Read: Download Dissertation

Abstract


Due to the easy availability, the ease of preparation, the low cost and special doping mechanism, polyaniline has become a focus in conducting polymers in recent years. Carbon nanotubes were the materials with one dimensional nanostructure. Its excellent electrical, optical and mechanical properties have made them very promising nanomaterials for many applications. The formation of polyaniline/carbon nanotube composites can be considered as a promising approach to obtain the materials in which the two elements have synergetic effects.Cationic surfactant cetyltrimethyl ammonium bromide(CTAB) was selected as dispersant to improve the dispersity of CNTs. In this article, PANI/CNTs composites were synthesized via chemical oxidative polymerization by using ammonium persulfate ((NH4)2S2O8) as oxidant and sulfosalicylic acid as dopant in aniline hydrochloride. Many factors affecting conductivity were investigated and optimized. And it was found that the conductivity of polyaniline was much higher when n(APS):n(An) =1, m(CNTs):m(AN)=0.07, n(SSA):n(An)=0.3, the dropwise time of APS was 2h, the reaction temperature was 0℃.The mophology, structure and performance of the products were observed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), fourier transform infrared spectra (FT-IR), thermogravimetric analysis (TGA) and UV-vis spectrometry. The formation mechanism of polyaniline/carbon nanotube composites were also investigated.Electrochemical methods was used to prepare polyaniline and polyaniline/carbon nanotube composites with citric acid as dopant in sulfuric acid solution. The influences of various factors to the conductivity were investigated. The result showed that the concentration of citric acid, sulfuric acid and other factors have great impacts on the conductivities and mophologies of products. The mophology, structure and the thermal stability of polyaniline prepared by electrochemical polymerization were observed by SEM. Electrochemical performance of the products were investigated and analyzed with electrochemical work station. It was proved that the redox property was better when the concentration of citric acid was lower. And compared with polyaniline, the impedance was lower and electrochemical properties better. .

Related Dissertations

  1. Research on Mud Density Measuring Method Using Ultrasonic,TE256.7
  2. Study on Characteristics of Contiuous Fiber-Reinforced Metal Matrix Composites under Hypervelocity Projectile Impact,TB332
  3. Preparation and Tribological Properties of TZ3Y20A-SrSO4 Ceramic Matrix Composites,TB332
  4. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  5. The Influence of Magnetic Field Topology on Electron Motion in Hall Thrusters,V439.2
  6. The Preparation of Polyaniline-Metal Complex and the Study on Its Catalytical Property,O634
  7. Preparation and Anticorrosion Properties of Doped Polyaniline/Epoxy Coating,TQ637
  8. Preparation and Properties of lead-free glass powder,TQ171.6
  9. Preparation and Property Study of Polyaniline/Polyester Composite Conductive Fabric,TS195.6
  10. Research on Electrochemical Synthesis and Application of Conductive Polyaniline,O633.21
  11. Study on the Dynamic Thermal Test Device of Sprinklers,TU892
  12. Research on Detection of the Carbamate Pesticides by Aminoacids-matal Ions Films Chemically Modified Sencor,S481.8
  13. Growth of Single-walled Carbon Nanotube Arrays and the Study of Their Adhesion Force,TB383.1
  14. The Function Analysis of Ceramidase (CER) from Arabidopsis Thaliana,Q943
  15. Synthesis and Visible Light-Driven Photocatalytic Performances of Silver Halide/Conducting Polymer Nanocomposites,TB383.1
  16. Studies on Damping Modification of Fiber Reinforced Composites,TB332
  17. Studies on Genotoxicity of Two Novel Contraceptive Materials,R114
  18. Properties and Ultrasonic Grinding Experimental Study on the Nano Ceramics Toughened by ZrO2,TG580.6
  19. SiC_p/6061Al Composite Fabricated by Liquid Phase Mechanical Stirring Casting,TG249.9
  20. Research on the Interface Structure and the Infiltration-mechanism of SiC_p/AZ91D by Vacuum,TB331
  21. The Study on Reinforced Particle Pretreatement and Compound Technology of Al Matrix Composite Reinforced by SiCp,TB331

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile