Firuz Zainuddin
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Preferred name
Firuz Zainuddin
Official Name
Firuz, Zainuddin
Alternative Name
Firuz, Z.
Firuz, Zainuddin
Zainudin, Firuz
Zainuddin, F.
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Scopus Author ID
55955213100
Researcher ID
AAC-4690-2019

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Swelling, tensile and thermal behaviors of citric acid crosslinked Tapioca starch/cellulose biocomposite films

2020 , Salleh Morgan Noor Zulaika , Ong Hui Lin , Firuz Zainuddin

The biocomposite films were prepared using a solution casting method and allowed to dry in the oven of 50 °C. The cellulose used in this research was extracted from the rice straw. The biocomposite films firstly were prepared without crosslinker with various cellulose content; (0.2, 0.4, 0.6, 0.8 and 1.0) g wt%. Based on the tensile strength result, 0.6 g of cellulose is an optimum amount to prepare the biocomposite films with various amounts of crosslinker; (1, 2, 3, 4 and 5) g. The tapioca starch/cellulose biocomposite films crosslinked with lemon juices have higher tensile strength (16 MPa) and lower in swelling percentage (3.32%) compared to the biocomposite films crosslinked with key lime juice (5.44 %). The thermal behavior was studied based on the Differential Scanning Calorimetry test shows the biocomposite film that highly crosslinked needs higher energy during their phase change. The energy liberated in the tapioca starch/cellulose biocomposite film with key lime juice as crosslinker is 201.6 J/g while that of biocomposite film with lemon juice as crosslinker is 383.0 J/g.

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Comparison of corn and tapioca starch binders on the characteristic of rice straw charcoal briquettes

2023-09 , Syed Nuzul Fadzli Syed Adam , Firuz Zainuddin , Noor Zulaika Salleh Morgan , Hazmi Helmi Saroni

Agricultural waste was abundant and commonly burnt on the landfilled due to no significant uses. Rice straw was rarely used in proper scientific work for the production of charcoal briquettes. Rice straw can be converted into an alternative charcoal briquette which is used for generating heat energy. However, the suitable type and concentration of binder used for the briquette production were still unclear. The aim of this study is to make the properties comparison between corn and tapioca starch as binder used in rice straw charcoal briquettes. Chopped rice straw was combusted in oven at 260 °C for 4 h in order to produce char powder. Each kind of starch and char powder was thoroughly mixed together and then compacted into charcoal briquettes by using a carbon steel die. Charcoal briquette samples were then analysed for volatile matter, fixed carbon, moisture content, ash content and burning rate. It was found that corn and tapioca starch binders with different binder concentrations affect slightly different characters and properties of charcoal briquettes product.

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