Synthesis of a Thermally Stable Silica/p-Anisidine Sol–Gel Powdered Material
✍ Scribed by Flávio A. Pavan; Leonardo Franken; Cristiano A. Moreira; Tania M.H. Costa; Edilson V. Benvenutti; Yoshitaka Gushikem
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 61 KB
- Volume
- 241
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
A thermally stable silica/p-anisidine material was obtained by a sol-gel method in two steps: (a) p-anisidine was reacted with 3chloropropyltrimethoxysilane using NaH as a base activator and; (b) the resulting product of this reaction, p-anisidinepropyltrimethoxysilane (AnPTMS), was condensed with tetraethylorthosilicate. The sol-gel materials were obtained by using the AnPTMS precursor at concentrations of 0.05, 0.15, 0.23, 0.35, and 0.46 mol L -1 . The thermal stability of the organic attached groups increases with the AnPTMS precursor concentration added. For the 0.35 and 0.46 mol L -1 cases, the resulting materials were thermally stable up to 300 • C, under vacuum.