Preparation and characterization of monodisperse, mesoporous natural poly(tannic acid)-silica nanoparticle composites with antioxidant properties


ŞAHİNER N., Sagbas S., Aktaş N.

MICROPOROUS AND MESOPOROUS MATERIALS, cilt.226, ss.316-324, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 226
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.micromeso.2016.02.012
  • Dergi Adı: MICROPOROUS AND MESOPOROUS MATERIALS
  • Sayfa Sayıları: ss.316-324

Özet

Mesoporous poly(Tannic Acid)-Silica nanoparticle composites (p(TA)-Si NPs) were prepared via one pot reaction. At various TA amounts in feed, 50,100, 250, 500, 1000 mg at different reaction times, 2, 4, 8,12, 24 h in the presence of TEOS and epoxy crosslinker, trimethylolpropane triglycidyl ether (TMPGDE), NPs composites were readily prepared. The prepared p(TA)-Si NPs by using 1000 mg TA at 12 h reaction time at room temperature as p(TA)1000-Si NPs provided the highest yield (similar to 48%). The particle size, monodispersity, specific surface area, porosity, and the gravimetric yields are greatly depended on initial TA concentration and reaction time. The particles sizes were found as 237-445 nm depending on TA content and reaction time. The highest surface area was measured as 872 m(2)/g for p(TA)1000-Si NPs for 2 h reaction time. The thermal stability of p(TA)-Si NPs decreased as TA content is increased. Interestingly, p(TA)1000-Si NPs are found effective antioxidant materials. (C) 2016 Elsevier Inc. All rights reserved.