Effect Of Rice Husk Ash On Natural Rubber Compound As Green Filler

Razak, Noorshahirah (2018) Effect Of Rice Husk Ash On Natural Rubber Compound As Green Filler. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

As the greenhouse effects and global warming issues focus their stand in the fast changing modern world, more efforts are being done towards manufacturing products, which are environment-friendly and recyclable. One of the favourites subjects is the utilization of agricultural waste into useful value-added product. Rice husk which is generated by the rice mills during rice processing composes mainly organic siliceous material. Together with its abundance supply and attractive price, rice husk has the potential to be used as filler in polymeric materials especially rubber. This study focuses on the effect of physical and tensile properties of natural rubber (NR) compound with different amount of rice husk ash (RHA) as a filler. The optimum compounding formulation of the material compound of natural rubber and rice husk ash based on 100 phr of the natural rubber (NR) and different amount of rice husk ash (RHA) at 1, 3 and 5 phr. In order to improve the interfacial interaction between NR and RHA, Si 69 was used as coupling agent at composition of 1 phr. The materials undergo the mixing process using internal mixer and open roll mill. Then, the compound is compressed into a square mold by hydraulic molding press at 180℃ in 8 minute. Afterward, the cutting process into dumbbell shape was done by using waterjet machine according to ASTM dimensions and then tensile test, hardness test and density test was performed to determine their physical and mechanical properties. The morphological study of the compound was done by using optical microscope and scanning electron microscopy (SEM). Based on the result from the tensile testing that has been conducted on the sample compounding, with increasing the amount of RHA decreasing the tensile strength of natural rubber. In addition, the value of hardness increase when the amount of RHA used is increased because as filler particles are introduced into the rubber, the elasticity of the rubber chains is reduced, resulting in more rigid vulcanization.

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