Synthesis and characterization of pan nanofiber reinforced with functionalized mixture CNT/CNF by electrospinning technique
In this study, functionalization of CNT and CNF was done using oxidative acid treatment with concentrated HCl and HN03 solution mixture at 3: 1 ratio. Various process variables such as duration, mode of treatment, agitation and temperature are controlled, and consequently the functional groups gr...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/17867/1/Synthesis%20and%20characterization%20of.pdf |
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| Summary: | In this study, functionalization of CNT and CNF was done using oxidative acid
treatment with concentrated HCl and HN03 solution mixture at 3: 1 ratio. Various
process variables such as duration, mode of treatment, agitation and temperature
are controlled, and consequently the functional groups growth on the surfaces of
both CNT and CNF was determined extensively by the aid of Fourier Transform
Infrared Spectroscopy (FTIR). The study proceeds by synthesizing the PAN/CNTCNF
polymer nanocomposite fiber using electrospinning technique. The study used
PAN polymer solution containing 10 wt % mixture of CNT: CNF at various ratios of
8: 2,2: 8,6: 4, and 4: 6. Some critical criterions of operational parameters such as
applied voltage (12 kV, 12.5 kV, 13 kV) and working distance (13 cm, 14 cm, 15
cm) were also being optimized beforehand. The available evidences supported that,
the optimal operational parameter set was found to be at 15 cm, 13 kV set division
as validated by series of scrutinized characterization assessments; where the set up
successfully produced the thinnest average nanofiber diameter at 318 nm with the
range of 288 to 340 nm. The graphitized nanocomposite fiber was then assessed
and characterized comprehensively based on its morphological and elementary
study using FESEM-EDX, thermal stability behaviour using TGA and DSC,
crystallography assessment by XRD analysis, and conductivity study via EIS. Based
on the overall assessment of various field of characterizations, overwhelming
evidences has led to the confirmatory conclusion, corroborating PB15Z as the best
electrospun PAN/CNT-CNF nanocomposite fiber with an exceptionally thin fiber
diameter of 280 nm with 232 nm to 304 nm in range. It possessing the highest
carbon content approximately 80 % in total and a good conductivity value recorded
at 2.3555 x 10-4 S/m. The fiber also showed the most stable behaviour under
intense heat exposure, withstanding the thermal introduction with gradual decrease
of weight without any sudden and major fluctuation of weight. |
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