Optimization of the synthesis based on Resorcine and formaldehyde to obtain carbon nanoxérogels

The sol-gel method consists on obtaining very pure products from selected precursors. Indeed, synthesizing very pure activated carbon (> 99% carbon) using organic precursors containing only carbon and oxygen as hetero atoms to form a polymeric resin by pyrolysis. The proposed synthesis reaction i...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2012-01, Vol.28 (1), p.12034-8
Main Authors: Zweg, A, Elaloui, E, Nouri, S, Moussaoui, Y
Format: Article
Language:English
Subjects:
Acetic acid
Activated carbon
Aqueous solutions
Carbon
Catalysis
Catalysts
Chemical synthesis
Crosslinking
Design optimization
Factorial design
Formaldehyde
Initiation (polymerization)
Media
Nanostructure
Polymerization
Precursors
Pyrolysis
Sodium carbonate
Sol gel process
Sol-gel processes
Solvents
Synthesis
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Summary:The sol-gel method consists on obtaining very pure products from selected precursors. Indeed, synthesizing very pure activated carbon (> 99% carbon) using organic precursors containing only carbon and oxygen as hetero atoms to form a polymeric resin by pyrolysis. The proposed synthesis reaction is in the border of two sciences: the Sol-gel and polymerization. The polymerization by mechanism followed by the initiation and propagation, the sol-gel by evolution of the media environment starting with a solution of various ingredients to have the particle's sol in the emulsion solvent. The sol turns into a gel which is the result of three-dimensional crosslinking of the material trapping the solvent. In this work we propose to introduce a new method of synthesis of these nanoxérogels by polycondensation of resorcinol with formaldehyde in two different media (water and acetone) in the presence of two catalysts (acetic acid and sodium carbonate). By varying the following parameters: solvent, nature and quantity of catalyst, 16 samples were obtained. By the method of factorial design (2k): an optimization is realized by following three characteristics of nanoxerogels prepared: the density, the gel time and performance. The results indicate the best conditions for the synthesis of a carbon nanoxerogel: the lowest quantity of acid catalyst in aqueous media (A5).
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/28/1/012034