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Functionalizing titania nanoparticle surfaces in a fluidized bed plasma reactor.

B Deb1, V Kumar, T L Druffel

  • 1Institute for Advanced Materials and Renewable Energy, University of Louisville, Louisville, KY 40292, USA. biswapriya.deb@louisville.edu

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Summary

Functionalizing titanium dioxide (TiO2) nanoparticles with acrylic acid and tetraethylorthosilicate plasma improves their dispersion in polymer nanocomposites. This surface treatment reduces agglomeration and enhances nanoparticle integration for engineering applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Nanoparticle surface functionalization is crucial for creating stable, homogeneous dispersions in polymer nanocomposites.
  • Reduced surface energy and reactive groups enhance nanoparticle integration and mechanical properties.
  • Agglomeration of nanoparticles often limits their effective use in advanced materials.

Purpose of the Study:

  • To investigate the functionalization of commercial titanium dioxide (TiO2) nanoparticles using a fluidized bed inductively coupled plasma (FB-ICP) reactor.
  • To evaluate the effectiveness of acrylic acid (AA) and tetraethylorthosilicate (TEOS) plasma treatments on TiO2 nanoparticle surfaces.
  • To assess the impact of functionalization on nanoparticle dispersion and agglomeration in polymer matrices.

Main Methods:

  • Utilized a fluidized bed inductively coupled plasma (FB-ICP) reactor for batch treatment of TiO2 nanoparticle powders.
  • Applied plasma treatment with acrylic acid (AA) and tetraethylorthosilicate (TEOS).
  • Analyzed functionalized particles using High-Resolution Transmission Electron Microscopy (HRTEM) and Fourier-Transform Infrared Spectroscopy (FTIR).

Main Results:

  • Achieved uniform polymer coatings (poly-acrylic acid/siloxane) on TiO2 nanoparticles with thicknesses of a few nanometers.
  • HRTEM confirmed homogeneous coating and reduced particle agglomeration.
  • FTIR analysis verified the presence of desired functional groups on the nanoparticle surfaces.
  • Demonstrated significantly improved dispersion behavior of functionalized TiO2 nanoparticles.

Conclusions:

  • FB-ICP treatment is an effective method for functionalizing TiO2 nanoparticles with AA and TEOS.
  • Surface functionalization via plasma treatment enhances nanoparticle dispersion and reduces agglomeration in polymer nanocomposites.
  • This approach offers potential for scalable, continuous treatment of powders for engineering applications.