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Development of HDPE/rice straw composite for construction application via injection mold techique

A., Nurnadia and M., Dayangku Intan and Wan Abdul Rahman, Wan Aizan and Sulaiman, Hanizam (2007) Development of HDPE/rice straw composite for construction application via injection mold techique. In: VIIth National Symposium On Polymeric Materials 2007, November 27-28, 2007, Universiti Kuala Lumpur.



This study investigates the characteristic of rice straw/high density polyethylene injection grade at various rice straw compositions. Rice straw is produced as by product of rice cultivation and is unique relative to other cereal straws in being high lignin and high in silica. A lignocellulosic material rice straw was used as the fiber in the biocomposites and high density polyethylene (HDPE) injection grade as the matrix. Rice straw was oven dried at 70°C for 24 hours, grinded and sieved to obtain the 250um in particle size. A counter rotating twin shaft high speed mixer was utilized to mix the rice straw and HDPE. The blends were then compounded on corotating and intermeshing twin screw extruder. Various formulations were prepared 10%, 20%, 30%, 40% and 50% of fiber contents. The compounded biocomposite were injection mold into test specimens to analyse their process ability after analyzing the compound for its melt flow index (MFI). Chemical structure of the biocomposite was analyzed on FTIR whereas the thermal characteristic on the differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). The water absorption characteristic was also determined. MH indicates that up to 50% rice straw loading, the biocomposite is able to be injected and within the injection grade specification. The higher the rice straw content, the lest thermally stable th biocomposite becomes and the lower is the melting point. Thermal behaviour also indicated that the suitability of processing HDPE/rice straw biocomposite is below 200°C depending on the rice straw composite.

Item Type:Conference or Workshop Item (Paper)
Additional Information:21st Symposium of Malaysian Chemical Engineers, 2007, Universiti Putra Malaysia
Uncontrolled Keywords:biocomposites, HDPE/rice straw composite, injection mold techique, lignocellulosic material
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:5733
Deposited By: Norhani Jusoh
Deposited On:26 Jun 2008 05:00
Last Modified:24 Apr 2012 01:11

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