, Volume 11, Issue 2, pp 1063–1070 | Cite as

Uniformly Embedded Cellulose/Polypyrrole-TiO2 Composite in Sol-Gel Sodium Silicate Nanoparticles: Structural and Dielectric Properties

  • Amany M. El NahrawyEmail author
  • Ahmed A. Haroun
  • Ali B. Abou Hammad
  • Mohamed A. Diab
  • Samir Kamel
Original Paper


Modified composites based on cellulose filled with nano-particles of sodium silicate forming cellulose/polypyrrole-TiO2/ sodium silicate nanocomposite were prepared by combining a colloidal sol–gel technique and in-situ oxidative chemical polymerization. The effect of polypyrrole content, processing and the coating by the sodium silicate nanoparticles on the morphology and structure of the prepared composites were studied. The method of processing used was proven to be efficient to uniformly disperse the nano-particles within the polymeric matrix. The dielectric properties, including dielectric constant, \(\varepsilon ^{\prime } (\omega )\), dielectric loss, \(\varepsilon ^{\prime \prime }(\omega )\), tan δ and ac conductivity, σac, of the obtained composites were studied.


Cellulose/TiO2 composite Polypyrrole Sol gel process Silica-based nano-composite Dielectric properties 


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The authors acknowledge the Science and Technology Development Fund (STDF), Egypt and Scientific Research Support Fund (SRSF), Jordan for financial support of the research activities related to this project; Project ID 22929.


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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Amany M. El Nahrawy
    • 1
    Email author
  • Ahmed A. Haroun
    • 2
  • Ali B. Abou Hammad
    • 1
  • Mohamed A. Diab
    • 3
  • Samir Kamel
    • 3
  1. 1.Solid State Physics Department, Physics Research DivisionNational Research CenterGizaEgypt
  2. 2.Industrial Research DivisionNational Research CenterGizaEgypt
  3. 3.Cellulose and Paper DepartmentNational Research CenterGizaEgypt

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