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, cilt.288, ss.535-542, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 288 Konu: 5
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1007/s00396-009-2167-0
  • Dergi Adı: COLLOID AND POLYMER SCIENCE
  • Sayfa Sayıları: ss.535-542

Özet

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.