I collected the electrospun nanofiber on aluminium foil, calcined at 500degree centigrade on the foil. But it looks the fibers are broken while before calcination it looks as fiber .Others reported as fiber at 500 degree centigrade.
Hi
The mechanical properties of electrospun fibers largely depend on their structure and morphology. On the other hand, depending on the type of fibers, temperature and humidity also have a great effect on breaking the fibers. Also, low rotation speed of the collector is recommended and the humidity of the electrospinning environment should be considered. Yours sincerely.
Dear Dr. Rahman, as well as the calcination temperature, also the heating rate is important. Did you check the heating rate from the literature? If it is high then it is not possible to keep the shape of the fiber even though the calcination temperature is appropriate.
Another important point may be the aluminum foil that you use during the calcination process. It will give a reaction with the oxygen existing in the atmosphere if you work under atmospheric conditions. It should be better to remove the fibers from the foil and put them on a ceramic substrate (for instance on an alumina substrate) and then you can carry out the calcination process with a slow heating rate.
If possible it is better to carry out a TG-DTA analysis to determine the right calcination conditions for the fibers. Good luck.
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