Physical and mechanical behaviors of pineapple leaf fibre reinforced thermoplastics corn starch bio polymer composites

Zakaria, Nazri Huzaimi (2020) Physical and mechanical behaviors of pineapple leaf fibre reinforced thermoplastics corn starch bio polymer composites. Doctoral thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Recently, the desire to develop environmentally friendly products is growing due to the accumulating of non-biodegradable waste, mainly the disposable product. Starch is one of the potential materials due to the easy availability, low cost, renewability and biodegradability. However, the natural behaviours associated with corn starch (CS) have demonstrated poor mechanical behaviours. Therefore, the modification of CS with the glycerol was applied to form thermoplastics corn starch (TPCS). Hence, characterizations of the TPCS were investigated and the best result was obtained from a mixture of 70 wt.% CS and 30 wt.% glycerol. Meanwhile, pineapple leaf fibre (PALF) is a versatile plant which can be considered a renewable source for composite development. Then, the modification procedure to enhance the behaviours of TPCS reinforced by PALF was employed by using several method; (I) preparation by using multi layers and single layer (2) reinforcement with different lengths of PALF, and (3) treatment with sodium hydroxide (NaOH). PALF reinforcement at the weight ratio of 20:80, 30:70, 40:60, 50:50, and 60:40 was prepared with TPCS. Consequently, the findings showed that the mechanical behaviours of the treated PALE/TPCS bio­ composite were improving via single layer. The tensile strength at low PALF loadings produced low values but when reached 40 to 50 wt.%, the tensile strength achieved the highest results. In terms of physical analysis, the preparation of treated PALE/TPCS bio-composite by single layer had a significant impact on moisture absorption and water absorption characteristics. In addition, the tests such as soil burial and water solubility were also affected by the fibre loading. Next, the PALF length affected the physical and mechanical behaviours of PALE/TPCS bio-composite. PALF with a length of IO mm showed better characteristics than the length of 2 mm and 30 mm. In conclusion, the TPCS/PALF bio-composites are potential materials for biodegradable products such as non-load bearing applications.

Item Type: Thesis (Doctoral)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
T Technology > TP Chemical technology > TP1080-1185 Polymers and polymer manufacture
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Mechanical Engineering
Depositing User: Mrs. Sabarina Che Mat
Date Deposited: 09 Sep 2021 03:49
Last Modified: 09 Sep 2021 03:49
URI: http://eprints.uthm.edu.my/id/eprint/920

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