Exploring a new preparation pathway for the synthesis of silica based xerogels as crack-free monoliths


Cok S. , Koc F., BALKAN F. , GİZLİ N.

CERAMICS INTERNATIONAL, cilt.45, ss.1616-1626, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 45 Konu: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ceramint.2018.10.038
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Sayfa Sayıları: ss.1616-1626

Özet

Comprehensive investigations to achieve monolithic silica xerogels in crack-free form under ambient conditions were carried out. Seven silica xerogels (SXs) were synthesized by following two different production pathways (one-step, two-step) by changing the type of the sol components. Morphological and chemical characteristics of the silica xerogels were revealed with the aid of the FTIR, EDX, Contact Angle, SEM, TGA and BET analyses. Imidazolium based ionic liquids (ILs) were incorporated into the xerogel structure to serve as drying control chemical, as well as to promote spring-back effect during the solvent evaporation. Amine based silica source 3-aminopropyltriethoxysilane (APTES) was also included as a silica co-precursor to improve the silica network.