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Silicon Chemistry

, Volume 1, Issue 1, pp 47–54 | Cite as

Effect of process parameters on the polymer mediated synthesis of silica at neutral pH

  • Siddharth V. Patwardhan
  • Niloy Mukherjee
  • Stephen J. Clarson
Article

Abstract

We report herein the synthesis of well-defined silica structures atneutral pH and ambient conditions using poly(allylamine hydrochloride)(PAH), a cationically charged synthetic polymer, as a catalyst/template.Tetramethoxysilane (TMOS) was used as the precursor and the synthesisprocess parameters varied include TMOS pre-hydrolysis time(tP), reaction time (tR), buffer, molecular weightof the polymer, TMOS concentration, polymer concentration andperturbation of the reaction mixture. It was found that the TMOSpre-hydrolysis time was an important parameter governing the resultingsilica morphology along with the reaction time and the TMOSconcentration. Characterization of the silica was performed using SEM,FTIR, EDS and XRD. The poly(allylamine hydrochloride), which was thecatalyst/template, was found to be incorporated into the silicaparticles. These findings are of importance for understanding the roleof polypeptides, in nature, and macromolecules, in general, that arecapable of forming similar silica structures.

silica sol-gel polyallylamine hydrochloride (PAH) tetramethoxysilane (TMOS) 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Siddharth V. Patwardhan
    • 1
  • Niloy Mukherjee
    • 1
  • Stephen J. Clarson
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of CincinnatiCincinnatiU.S.A

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