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https://ptsldigital.ukm.my/jspui/handle/123456789/500639Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Sharifah Nabihah Syed Jaafar, Dr. | |
| dc.contributor.author | Sharifah Nurul Ain Syed Hashim (P83414) | |
| dc.date.accessioned | 2023-10-13T09:47:03Z | - |
| dc.date.available | 2023-10-13T09:47:03Z | - |
| dc.date.issued | 2021-11-01 | |
| dc.identifier.other | ukmvital:130610 | |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/500639 | - |
| dc.description | Lignocellulosic materials can be used as a potential substance for the fabrication of bio-based composites for the use in electrical and three-dimensional (3D) printing applications. In this study, the utilisation of lignocellulosic materials in the fabrication of composites was investigated by preparing phenolic cellulose membrane (PCM) and 3D-printed poly-lactic acid (PLA)-lignin composites. The PCM composites were produced by using fabricated cellulose membrane (CM) as matrix and synthesised phenol-formaldehyde (PF) resin as filler. The synthesised PF resin was used because of its lower molecular weight and viscosity compared to commercial resin. The CM was prepared by using kenaf core and empty fruit bunch (EFB) bleached pulps. Next, the PCM composites were prepared by immersing the CM in different PF resin concentrations and cured. The pulps were analysed for their molecular weight (Mw), sugar and carboxyl contents, crystallinity, and solubility (in sodium hydroxide/urea). Meanwhile, the fabricated CM were analysed for their morphology, transparency, and tensile properties. The PF uptake, water absorption, surface roughness, and electrical resistivity of PCM composites were determined. The finding showed that only bleached pulp from kenaf core was able to form membrane due to its solubility. The higher solubility of kenaf was contributed by their low Mw and crystallinity. The morphology study showed thick CM had smaller pore distribution which resulted in low transparency and high tensile properties. The PF uptake was influenced by the impregnation conditions. The presence of PF resin and its concentrations influenced the surface roughness, water absorption and resistivity of CM and PCM composites respectively. On the other hand, in the production of 3D printed composites, kraft and organosolv lignins at different percentages were blended with PLA. The thermal and chemical characterisations of lignin and the composites were studied. The mechanical properties of 3D-printed bar were also characterised. Finding from the 3D-printed composites showed that kraft lignin exhibited higher Mw, polydispersity (PDI), and thermal stability than organosolv lignin. Thus, lead to the better thermal stability and chemical interaction of its composites (kraft-PLA). However, the mechanical test for the 3D-printed bar showed that organosolv-PLA demonstrated high flexural strength. This study proved that the lignocellulosic composites such as PCM and 3D printed PLA-lignin show a great potential on end-use requirements due to its within the framework of availability, renewability, recyclability, energy use, and environmental considerations.,Ph.D | |
| dc.language.iso | eng | |
| dc.publisher | UKM, Bangi | |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
| dc.rights | UKM | |
| dc.subject | Lignocellulose | |
| dc.subject | Cellulose | |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | |
| dc.subject | Dissertations, Academic -- Malaysia | |
| dc.title | Utilisation of lignocellulosic components in phenolic cellulose membrane and lignin-PLA 3D printed composite | |
| dc.type | Theses | |
| dc.format.pages | 116 | |
| dc.identifier.callno | TP248.65.L54S533 2021 tesis | |
| dc.identifier.barcode | 006840(2022) | |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
Files in This Item:
| File | Size | Format | |
|---|---|---|---|
| ukmvital_130610+SOURCE1+SOURCE1.0.PDF Restricted Access | 1.53 MB | Adobe PDF | View/Open |
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