Novel strategy for tailoring of SiO2 and TiO2 nanoparticle surfaces with poly(epsilon-caprolactone)


Karagöz B. , GALLI G., DURMAZ H. , HIZAL G. , TUNCA Ü. , BICAK N.

COLLOID AND POLYMER SCIENCE, vol.288, no.5, pp.535-542, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 288 Issue: 5
  • Publication Date: 2010
  • Doi Number: 10.1007/s00396-009-2167-0
  • Title of Journal : COLLOID AND POLYMER SCIENCE
  • Page Numbers: pp.535-542

Abstract

A novel strategy was developed for tailoring of SiO2 and TiO2 nanoparticle surfaces with poly(epsilon-caprolactone) (PCL). Thus, a self-curable polyester, poly(2-hydroxypropylene maleate) was adsorbed on the nanoparticle surfaces and heated to 180 A degrees C to give a cross-linked polyester layer with residual hydroxyalkyl groups on their surfaces. Surface-initiated polymerization of epsilon-caprolactone from hydroxyalkyl groups on the surfaces yielded core-shell nanoparticles with cross-linked core and PCL shells (22.2-71.4%). The organic shell layers around the nanoparticle cores were evidenced by transmission electron microscopy, dynamic light scattering, and thermogravimetric analyses techniques. The core-shell nanoparticles were then employed in preparing the stable and the homogenous dispersions with poly(methyl methacrylate-stat-butyl acrylate) solutions. An application of the solutions onto glass substrates yielded uniform and nearly transparent free standing films (40-60 mu m) with good homogeneity as inferred from scanning electron microscopy pictures.