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https://ptsldigital.ukm.my/jspui/handle/123456789/499968Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Khairiah Haji Badri, Prof. Dr. | - |
| dc.contributor.author | Amamer Musbah Omran Muftah (P69261) | - |
| dc.date.accessioned | 2023-10-13T09:36:45Z | - |
| dc.date.available | 2023-10-13T09:36:45Z | - |
| dc.date.issued | 2017-01-17 | - |
| dc.identifier.other | ukmvital:96857 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/499968 | - |
| dc.description | Medium-density fibreboards (MDF) based on oil palm empty fruit bunch fiber (EFB), kenaf fiber (KF) and hybrid of EFB/KF were prepared with the prepolymerised polyurethane (pPU) as the gluing matrix at a ratio of 65:35 of the fiber to pPU. These MDFs were processed at 56 ºC for 9 min at 760 MPa based on optimization study. The optimization stage also involved determination of loading percentage of EFB and KF at ultimate strength. The hybrid EFB/KF MDF was then prepared using the same technique and ratio to pPU with the ratio of EFB to KF was maintained at 70:30. The formulated MDF systems were then each being enhanced for its fire property. An occurrence of a chemical interaction between hydroxyl terminals of the fiber and the pPU was determined via FTIR spectroscopy. Aluminum trihydroxide (ATH) was used as the fire retardant at loading percentage of 0, 5, 10, and 15 wt% of total mass of the matrix. Its effect on the mechanical, thermal, physical and fire properties of the EFBMDF, KF-MDF and hybrid EFB/KF-MDF were studied. Inclusion of ATH enhanced the mechanical strength of the EFB-MDF, KF-MDF and hybrid EFB/KF-MDF. It was well-dispersed in the MDF resulted in greater impact strength, modulus of rupture (MOR) and modulus of elasticity (MOE). Thermogravimetric analysis (TGA) detected that ATH changed the thermal stability of the EFB-MDF, KF-MDF and hybrid EFB/KF-MDF indicated by the decreased in the weight loss. DMA curves of EFBMDF, KF-MDF and hybrid EFB/KF-MDF exhibited that the presence of ATH increased stiffness resulted in an increase in loss and storage moduli as well as tan . However, beyond the glass transition temperature (Tg), a decline in loss modulus was observed. However, the storage modulus of KF-MDF at 15% loading decreased and this was attributed to poor interaction of the KF-MDF system upon inclusion of ATH. Differential scanning calorimetry (DSC) analysis revealed that ATH increased the Tg of all MDFs. The fire test for EFB-MDF, KF-MDF and hybrid EFB/KF-MDF indicated that the burning rate reduced progressively as the loading level of ATH increased. The lowest burning rate (3.2 mm/s) was recorded at maximum loading of 15 wt% of ATH for all MDFs. The enthalpy determined by bomb calorimeter supported the burning test results. The rate of water absorption is a factor to the ATH loading percentage and the number of immersion days. The water absorption decreased as the loading level of ATH increased (6.5 - 2.3%). Moreover, observation on the SEM micrographs supported the findings in the analysis of mechanical properties. These findings demonstrate that fiber-matrix adhesion and interfacial interaction are promoted by the presence of ATH. All MDF systems showed insignificant different in mechanical, thermal and burning properties except for the KF-MDF where the mechanical properties decreased substantially at 15 wt% ATH.,Certification of Master's/Doctoral Thesis" is not available | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | - |
| dc.rights | UKM | - |
| dc.subject | Polymerization | - |
| dc.subject | Oil palm fiber | - |
| dc.subject | Kenaf fiber | - |
| dc.subject | Fireboard | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.title | Fire-resist fiberboard from oil palm fiber and kenaf fiber crosslinked with polyurethane via condensation polymerization | - |
| dc.type | Theses | - |
| dc.format.pages | 185 | - |
| dc.identifier.barcode | 002793(2017) | - |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_96857+SOURCE1+SOURCE1.0.PDF Restricted Access | 288.55 kB | Adobe PDF |  View/Open |
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