Polyhydroxyalkanoates/zinc oxide (PHA/ZnO) nanocomposites for dielectric applications /
The objective of this research is to develop polymer/metal-oxides nanocomposites based on polyhydroxyalkanoates (PHA) and zinc oxides (ZnO). The nanocomposites with variation of 2, 4, 6, and 8 wt% of ZnO were prepared through melt blending process in an internal mixer followed by compression molded....
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2015
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| Subjects: | |
| Online Access: | Click here to view 1st 24 pages of the thesis. Members can view fulltext at the specified PCs in the library. |
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| Summary: | The objective of this research is to develop polymer/metal-oxides nanocomposites based on polyhydroxyalkanoates (PHA) and zinc oxides (ZnO). The nanocomposites with variation of 2, 4, 6, and 8 wt% of ZnO were prepared through melt blending process in an internal mixer followed by compression molded. The mechanical properties of PHA/ZnO nanocomposites were studied through tensile tests and examined their morphology under field emission microscopy (FESEM). The thermal properties were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). X-ray diffraction (XRD) and fourier transform infra-red (FTIR) analysis also have been carried out in order to evaluate the nanoparticles dispersion, percentage of crystallinity and possible bond formation. The mechanical tests showed an improvement in tensile strength and tensile modulus in increasing the ZnO loadings. The optimum tensile strength was observed at 4 wt% zinc oxide with 14.0 MPa. Degradation of PHA/ZnO nanocomposites was determined slightly shifted to lower temperature at about 10 °C. X-ray diffraction (XRD) and Fourier transform infra-red (FTIR) spectroscopy, higher percentage of crystallinity and formation of new bonds respectively were seen with the addition of zinc oxide indicates on enhancement in thermal and mechanical properties of PHA/ZnO nanocomposites. The electrical conductivity was increased as the ZnO nanofiller increased in terms of electrical resistance shown a decreased value. These biodegradable nanocomposites show great potential as an alternative to synthetic plastic packaging materials and disposable applications. |
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| Item Description: | Abstracts in English and Arabic. " A dissertation submitted in fulfilment of the requirement for the degree of Master of Science (Materials Engineering)."--On t.p. |
| Physical Description: | xiv, 62 leaves : ill. ; 30cm. |
| Bibliography: | Includes bibliographical references (leaves 58-62). |