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Volume 5, Issue 6 (Suppl) J Mat. Sci.
ISSN: 2321-6212 Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13TH INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Studies on the synthesis of silica powder from rice husk ash as reinforcement filler in rubber tire tread
part: Replacement of commercial precipitated silica
Addis Lemessa Jembere and Solomon Workneh Fanta
Bahir Dar University, Ethiopia
The ultimate objective of this experimental analysis is to prospect the possibility of replacing inorganic filler (which
consumes exhaustive energy) by organic filler. In this study investigation on the utilization of Rice Husk Ash Silica (RHAS)
as filler in vehicle tire tread part was examined. Silica was synthesized from rice husk ash by using a method based on alkaline
extraction followed by acid precipitation. Effects of extraction temperature, retention time and NaOH concentration as a
digesting agent were investigated to get the best possible silica yield. The maximum yield was noted at the interaction of 60oC,
1.5 hours and 2.5 molarities with the silica purity of 83.7% by weight. The maximum silica yield obtained was further subjected
to different characterization techniques by means of AAS, XRD, BET, FTIR and DSC. Rheological and mechanical testing was
performed on the formulated (12 PHR) compounded rubber vulcanizates filled with RHAS and COS (Commercial Silica)
independently. The curing characteristic is that at 175oC on RHAS and COS filled rubber was examined with an oscillating
disk Rheometer. It was eminent that the rubber composite products reinforced with RHAS had shorter scorch time (T’10) at
1.20 minutes which caused a premature vulcanization than the COS filled rubber composite, improving the time required to
start the vulcanization. Though, the optimum curing time (T’90) showed retardation due to the possible interaction of silica
with the accelerators making it unavailable for cure reaction. The maximum torque for the RHAS was 13.49 Overall
mechanical properties like hardness, Young’s modulus, abrasion resistance of rubber products reinforced with RHAS was
better than COS filled rubber composite.
Biography
Addis Lemessa Jembere has completed his Master of Science degree in Process Engineering from Bahir Dar Institute of Technology, Bahir Dar University in
Ethiopia. Presently, he is the Lecturer of Bahir Dar University in the Department of Chemical Engineering.
Addis Lemessa Jembere et al., J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008