Pusat Pengajian Teknologi Industri - Tesis

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    Liquid Crystalline Polimers : Studies On Bisphenol, Hydroquinone And 1,4-Cyclohexanediol Based Thermotropic Main Chain Liquid Crystalline Polyesters
    (1996)
    Goh, Kok Soo
    Three types of main chain moiety liquid crystal polyesters, poly(phenyleneterephthalate) (ppt), poly(bisphenol-terephthalate) (pba) and poly(i,4- cyclohexanediol-terephthalate) (pcy) were synthesised using acidolysis melt condensation method. In this project, ppt was used as a control for comparison. The reactivity of hydroquinone (hq), bisphenol a (ba) and 1,4-cycohexanediol (cy) towards terephthanoyl chloride (tci) were analysed by differential scanning calorimeter (dsc). It was found that the reaction of hq and tci was the fastest while ba was the slowest among the three diols. In addition, a series of copolyesters with different ratio of hq : ba were synthesised to study the effects of flexible ba content in ppt system. The properties of synthesised polyesters were characterised in terms of their solubility and thermal stability. Thermal and liquid crystalline properties were characterised by dsc and x-ray diffraction (xrd) method. Morphology of the crude and annealed (420°c) samples were observed by using scanning electron microscope (sem). Fourier transform infrared (ftir) was done to confirm the presence of polyesters and the ratio of hqfba in the copolyesters.
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    The Effect Of Different Pre-Treatment Methods On Dewatered Sludge For Electricity Generation Using Membrane-Less Microbial Fuel Cell
    (2025-07)
    Shamsuddin, Nurul Atiqah
    Microbial Fuel Cell (MFC) is gaining high interest from researchers around the globe as this is a promising renewable technology that has capability in producing electrical energy. MFC is an attractive technology that has a mechanism that can convert waste substances into a form of usable energy. Membrane-less MFC (ML-MFC) is one of the types of MFC technology that shows great promise in providing a sustainable power source. In this study, the effect of the thermal pretreatment method (60, 80, 100, 120 and 140 ºC), sonication (10, 20, 30, 40 and 50 kHz) and alkaline pretreatment with pH (8, 9, 10, 11 and 12) on dewatered sludge (DS) as substrate for electrogenic bacteria (EB) in ML-MFC was optimized using one-factor-at-a-time (OFAT) approach. These pretreatments were selected for their potential to enhance sludge degradation, improve organic matter availability, and boost power generation through distinct physical and chemical mechanisms. The best performance of ML-MFC for generation of power density (11.27 mW/m2), degradation rate of DS (89.48 %) and biomass (1.92 mg/L) under optimum condition of 100 ℃ (thermal), pH 10 (alkaline) and 30 kHz (ultrasonication) had been obtained.
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    A Dual-Feature Active Packaging: Antimicrobial Release And Co₂ Scavenging For Fresh Produce Preservation
    (2025-08)
    Mohamad Jilani, Nafeesa
    This study focuses on the development and evaluation of active additives with dual-feature: antimicrobial release and CO₂ scavenging capabilities—for the preservation of fresh produce. In Phase 1, β-cyclodextrin (βCD) inclusion complexes were synthesized using linalool and eugenyl acetate through co-precipitation and kneading methods. Phase 2 focuses on the effect of selected dual-feature active additive in prolonging the shelf life of cherry tomatoes as a fresh produce model.
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    Investigation On The Potential Of Artocarpus Altilis Latex As Protein –Based Wound Healing Agent
    (2025-07)
    Selvaraja, Linesh Kumar
    Research on plant latex has been done extensively to evaluate its potential in wound healing. Artocarpus altilis (Breadfruit) is one of the plant species with medicinal properties such as diarrhoea, stomach aches, ear infections, fungal infections, injured eyes broken bone and wound. This study was done to evaluate the potential of breadfruit’s latex in wound healing through protein profiling and in-vitro studies. The breadfruit was collected from Bukit Mertajam, Pulau Pinang, Malaysia.
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    Heterogeneous Sulfonated Polysulfone Membrane In Microbial Fuel Cell Fueled By Dewatered Sludge And Fruit Waste Using Bacillus Subtilis As Biocatalyst
    (2025-08)
    A. Pusphanathan, Kavita
    Microbial fuel cell (MFC) is used as a bioelectrochemical system that converts organic waste, such as dewatered sludge and fruit waste, into electricity using engineered sulfonated polymeric membranes to enhance proton transfer and overall performance.The fabrication of advanced heterogenous sulfonated polymeric membranes for MFCs is the most potential topic at present to address the issue of substrate and microbe’s crossover, low proton transfer rates and higher internal resistance in the MFCs operation. In the present work, heterogenous sulfonated polysulfone crosslinked with sulfonated chitosan (SPSf/SCS) was utilized as proton exchange membrane in MFCs. The physical, chemical and electrochemical characterization of SPSf membrane with different immersion time in sulfonating agents were investigated as a screening procedure. The most well-performed SPSf was utilized as sulfonated polymer base to crosslink with sulfonated chitosan. Different formulations of SPSf/SCS were designed; namely SPSf/SCS-0.5 wt%, SPSf/SCS-0.75 wt% and SPSf/SCS-1 wt% and comprehensive physical, chemical, and electrochemical characterization was compared with the commercialized membrane Nafion 212.