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Effects of ultra violet irradiation on waste biopolymer based on vibration characterisation, mechanical and physical properties

Mohd Rus, Shaiqah (2015) Effects of ultra violet irradiation on waste biopolymer based on vibration characterisation, mechanical and physical properties. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Disposal of waste cooking oils becomes a problem in the developed countries because the limited options to dispose them and usually people will pour waste cooking oil down to the drain or sewers which contribute to clog and unpleasant odour. Thus, in this research, vegetable waste palm oil is used as a raw material in order to create foam and further processed into granulate form which is powder that are compressed using hot compression moulding technique. The fabricated samples produced after hot compress were represented as waste bio-polymer (WB) and later on, these WB were irradiated with ultra violet-irradiation (UV-irradiated) and the samples become UV-irradiated WB. WB and UV-irradiated WB samples with three different thickness/laminated structure with minimum thickness of 5.4 mm, three layer thicknesses of 10.8 mm and four layer thicknesses of 16.2 mm. These samples were examined by means of vibration transmissibility test and other physical tests. Vibration transmissibility test was operated at 1 mm and 1.5 mm for displacement transmissibility, 0.1 g and 0.15 g for acceleration transmissibility base excitation whereas the physical and mechanical properties were studied through compression test, differential scanning calorimeter (DSC) and density test. The morphological studies were observed using scanning electron microscope (SEM). UV-irradiation does not give influence towards WB in terms of damping ratio since it gives the most excellent vibration damping of 0.707. WB sample looks like needle, sharp, fibrous, coarse structure which can be seen at 0, 250 and 500 hour UV-irradiation WB but when the time exposure of UV is increasing, the surface morphology of the sample becomes blunter and the texture is much flatter. However, the overall structure has no major difference from 0 hour to 1000 hour UV-irradiation indicates that this UV-irradiated WB has high photo-stability. From the density test, the results indicated that WB (0 hour UV) is denser than UV-irradiated WB (1000 hour UV) which is 1025.73 kg/m3 and 914.87 kg/m3 respectively. The result of glass transition, Tg values for WB and UV-irradiated WB were decreased from 48.66˚C to 48.31˚C as the time of exposure of UV increases. As a conclusion, this WB and UV-irradiated WB are useful as a new material product which has been recycled to become bio-polymer generated from waste cooking oil; this product have good quality to survive in robust environmental condition in terms of UV radiation.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Depositing User: Normajihan Abd. Rahman
Date Deposited: 28 Apr 2016 07:22
Last Modified: 28 Apr 2016 07:22
URI: http://eprints.uthm.edu.my/id/eprint/7990
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