I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use.
Does any one have experience or any reference to share?
thank u all.
Dear Atefe Farahani, please take a look at the following documents. My Regards
https://doi.org/10.1021/jp960089o
https://link.springer.com/article/10.1007/s003960100558
https://doi.org/10.1155/2018/5784352
Dear Atefe Farahani, please take a look at the following documents. My Regards
https://doi.org/10.1021/jp960089o
https://link.springer.com/article/10.1007/s003960100558
https://doi.org/10.1155/2018/5784352
Hello! Here are some references that coat nanoparticles with TEOS via the Stober method. From my experience, the amount of TEOS and NH4OH can be varied to adjust the thickness of the silica.
Article Silica Coating of Silver Nanoparticles Using a Modified St??ber Method
Article Effect of silica coating on Fe3O4 magnetic nanoparticles for...
Thank u dear @Katrine Curtin. The problem is the ratio for starting polymerization is the same,but the quantities are different as you mentioned.I want to know the ratio ....
Dear Boaziz,thanks for your response.Do you know the min ratio of NH4OH/TEOS to start the polymerization?
Dear Atefe Farahani thank you for this very interesting technical question. The polymerization of tetraethyl orthosilicate is of significant practical interest. In addition to the highly useful references provided by Abdelkader BOUAZIZ and Kathrine Curtin please also have a look at the following relevant articles entitled:
1. Tetraethyl Orthosilicate-Based Hydrogels for Drug Delivery—Effects of Their Nanoparticulate Structure on Release Properties
This paper is Open Access and freely available from the general internet.
(see attached pdf file)
2. FT-IR Study of the Hydrolysis and Polymerization of Tetraethyl Orthosilicate and Polydimethyl Siloxane in the Presence of Tetrabutyl Orthotitanate
Article FT‐IR Study of the Hydrolysis and Polymerization of Tetraeth...
This article is freely available as public full text on RG.
3. Formation of Cagelike Intermediates from Nonrandom Cyclization during Acid-Catalyzed Sol-Gel Polymerization of Tetraethyl Orthosilicate
(see attached)
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