Thermal stabilization and carbonization are essential in obtaining fine electrospun CNF. Some articles report carbonization at quite lower temperature for different composites of the same parent material. How does carbonization temperature affect the CNF quality?
Dear Dr. Abdullahi Abbas Adam,
after the stabilization, higher carbonization temperature (1000-1200°C) contributes to the elimination of surface organic compound.
During the carbonization process, the intermolecular fibres formed graphite-like structures due to disordered carbons into graphitic carbons after carbonization process. Graphite is known as a good conductor due to delocalization of pi electron bond on the top and below carbon plane that allows the electron to move freely, so it can conduct better electricity. This nanoscale carbon-based material could make several noteworthy contributions to electronic applications such as for sensors and capacitors.
For more details, please see the source, the following, interesting paper:
-The Effects of Different Carbonization Temperatures on the Properties of Electrospun Carbon Nanofibre from Polyacrylonitrile (PAN) Precursor
Nurain Abdul Munajat, Abdul Hamid Nurfaizey, Mohd Haizal Mohd Husin, Siti Hajar Sheikh Md. Fadzullah, Ghazali Omar, Mohd Azli Salim
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 49, Issue 2, 85-91 (2018)
Available on RG at: https://www.researchgate.net/publication/327815536_The_Effects_of_Different_Carbonization_Temperatures_on_the_Properties_of_Electrospun_Carbon_Nanofibre_from_Polyacrylonitrile_PAN_Precursor
Best regards, Pierluigi Traverso
Pierluigi Traverso Thank you for your contributions. I find them very helpful and highly educative. Meanwhile, I guess from your contribution you are suggesting carbonization at higher temperature over lower temperate.
Hi Abdullahi, in analogy to "regular" PAN based fibers I would expect that the heat treatment has a stong sffect on the strenth/young's modulus correlations. I would expect a strength maximum at lower HTT and a rising stiffness with HTT. Where the maximum in strength occurs and how steep the rise in YM will be will strongly depend on the type of precursor material.
@ Frank Kern The precursor material is biomass. In order to produce high quality CNF via electrospinning, do you recommend carbonization at lower temperature?
hi Abdullahi, base on biomass (probably something related to cellulose or similar carbohydrate) I would expect to obtain very isotropic carbon material which requires extremely high temperature to crystallize, probably there is not much change in properties in the carbonization temperature range between 1100-1500°C. However i would expect an impact of heating rate as the material forms a lot of volatiles during carbonization. the structure of the porosity may have astong influence on strength. Very difficult to judge without experimental basis, You will have to try it out.
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