AAPS PharmSciTech

, Volume 5, Issue 4, pp 129–137 | Cite as

Nanoparticles containing ketoprofen and acrylic polymers prepared by an aerosol flow reactor method

  • Hannele Eerikäinen
  • Leena Peltonen
  • Janne Raula
  • Jouni Hirvonen
  • Esko I. Kauppinen


The purpose of this study was to outline the effects of interactions between a model drug and various acrylic polymers on the physical properties of nanoparticles prepared by an aerosol flow reactor method. The amount of model drug, ketoprofen, in the nanoparticles was varied, and the nanoparticles were analyzed for particle size distribution, particle morphology, thermal properties, IR spectroscopy, and drug release. The nanoparticles produced were spherical, amorphous, and had a matrix-type structure. Ketoprofen crystallization was observed when the amount of drug in Eudragit L nanoparticles was more than 33% (wt/wt). For Eudragit E and Eudragit RS nanoparticles, the drug acted as an effective plasticizer resulting in lowering of the glass transition of the polymer. Two factors affected the preparation of nanoparticles by the aerosol flow reactor method, namely, the solubility of the drug in the polymer matrix and the thermal properties of the resulting drug-polymer matrix.


nanoparticles ketoprofen aerosol polymer Eudragit 


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Copyright information

© American Association of Pharmaceutical Scientists 2004

Authors and Affiliations

  • Hannele Eerikäinen
    • 1
  • Leena Peltonen
    • 2
  • Janne Raula
    • 1
  • Jouni Hirvonen
    • 2
  • Esko I. Kauppinen
    • 1
    • 3
  1. 1.Center for New MaterialsHelsinki University of TechnologyVTTFinland
  2. 2.Faculty of Pharmacy and Viikki Drug Discovery CenterUniversity of HelsinskiHelsinkiFinland
  3. 3.Aerosol Technology GroupVTT ProcessesVTTFinland

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