Thermal stability and conductivity of the electrospun polyacrylonitrile/carbon nanotube and carbon nanofiber composite prepared through the electrospinning technique

Puvaneswaran Krishnan (2014) Thermal stability and conductivity of the electrospun polyacrylonitrile/carbon nanotube and carbon nanofiber composite prepared through the electrospinning technique. Masters thesis, Universiti Malaysia Sabah.

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Abstract

Electrospun PAN nanofiber with and without addition of carbon nanomaterial were produced via electrospinning technique. The PAN polymer with average molecular weight of 85000 g/mol were dissolved in N,N-dimethylformamide with 10 % w/w of PAN to DMF ratio. Four parameters in essence working distance (5,10 and 15 cm), applied voltage (10.0, 12.5 and 15.0 kV), type of carbon nanomaterial (CNT and CNF) and ratio of addition (2, 6 and 10 % w/w) were studied. The produced composite nanomaterials were undergone heat treatment in three different stages, which were stabilization, carbonization and graphitization. The morphology studies were carried out by Scanning Electron Microscope (SEM), thermal stability was investigated by Thermal Gravitimetry Analyzer (TGA), Differential Scanning Calorimetr (DSC) while electric conductivity was analyzed by Impedance Analyzer. For electrospun PAN without addition of carbon nanoparticle, 15 cm working distance was predetermined as the optimum working distance length where it gives the thinnest electrospun PAN which is sample P06 (0.48 micrometer) compared to other nanocomposite working distance. Electrospun PAN-CNT and PAN-CNF were produced with different applied voltage. By comparing, 10.0 kV applied voltage were predetermined as the optimum applied voltage y omparing the with ar on nanomaterial addition sample and gives the highest ash value and with melting rystalinity point at and - CNT-CNF for instance showed that the electrospun PAN-CNT-CNF mixture (sample ATF and ATT) has the highest electric conductivity properties (4.591 x 10 -4 Scm-1 and 4.871 x 10-4 Scm-1 with small average diameters and mi rometer and high ash ontain and at . This type of polymer nanomaterial is suitable for solar cell industry where it could increase the overall properties of the solar cell base plate

Item Type:	Thesis (Masters)
Keyword:	Electrospun PAN nanofibers, Carbon nanomaterials, Electrospinning technique, Working distance, Applied voltage, Thermal stability, Electric conductivity
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	DG MASNIAH AHMAD -
Date Deposited:	11 Apr 2025 10:06
Last Modified:	11 Apr 2025 10:06
URI:	https://eprints.ums.edu.my/id/eprint/43457

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