Study of dielectric properties of polypyrrole/titanium dioxide and polypyrrole/titanium dioxide-MWCNT nano composites

  • V. B. Aaditya
  • B. M. Bharathesh
  • R. Harshitha
  • B. V. ChaluvarajuEmail author
  • U. P. Raghavendra
  • M. V. Murugendrappa


The polypyrrole/titanium dioxide nano composites and polypyrrole/titanium dioxide-MWCNT nano composites were synthesized by chemical polymerization technique in the presence of an ammonium persulphate (oxidizing agent). Different concentrations viz. 15, 30, 45 and 60 wt% of titanium dioxide (TiO2) as well as mixture of TiO2-MWCNT in polypyrrole (PPy) respectively were used in the present study. The nano composites have almost spherical type shaped particles which have cluster formation as confirmed from SEM photos. The XRD graphs reveal that the PPy/TiO2 (PT) nano composites have shown the semi-crystalline nature and also, the graphs indicate the changeover of the structure of PPy/TiO2-MWCNT (PTM) nano composites from amorphous to semi-crystalline nature. From the FTIR figures, shift in wavenumber towards lower side is noticed in the case of PT and PTM nano composites when compared to PPy. The dielectric properties such as dielectric constant, dielectric loss and tangent loss have shown good behavior. This reveals that, the TiO2 as well as mixture of TiO2-MWCNT particles have shown strong dependence on PPy and helps to form good composites. So, the nano composites are good dielectric materials.



The authors would like to thank the Principal, BMSCE, Bengaluru-560019 and Rajya Vokkaligara Sangha, BIT, Bengaluru-560004 for their cooperation. The authors also thank Dr. Chitra Sankar for useful discussions and the revision of the paper. The Center of Excellence in Advanced Materials Research which has all facilities at BMS College of Engineering is supported by the Technical Education Quality Improvement Program (TEQIP) of the World Bank.


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Authors and Affiliations

  • V. B. Aaditya
    • 1
  • B. M. Bharathesh
    • 2
  • R. Harshitha
    • 3
  • B. V. Chaluvaraju
    • 3
    Email author
  • U. P. Raghavendra
    • 3
  • M. V. Murugendrappa
    • 4
    • 5
  1. 1.Chalmer’s University of TechnologyGöteborgSweden
  2. 2.KTH Royal Institute of TechnologyStockholmSweden
  3. 3.Department of PhysicsBangalore Institute of TechnologyBengaluruIndia
  4. 4.Department of PhysicsBMS College of EngineeringBengaluruIndia
  5. 5.Center of Excellence in Advanced Materials ResearchBMS College of EngineeringBengaluruIndia

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