Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder

Magnetorheological elastomers (MREs) are a new class of elastomeric composites consisting of a rubber matrix and magnetic particles. In this work MREs based on natural rubber (NR), waste natural rubber glove powder (WGP) and carbonyl iron particles (CIP) were successfully produced. The Taguchi metho...

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Main Author:	Lai, Ngoc Thien
Format:	Thesis
Language:	English
Published:	2019
Subjects:	T Technology
Online Access:	http://eprints.usm.my/55180/1/Fabrication%20And%20Characterisation%20Of%20Magnetorheological%20Elastomers%20Based%20On%20Natural%20Rubber%2C%20Carbonyl%20Iron%20And%20Waste%20Natural%20Rubber%20Glove%20Powder_Lai%20Ngoc%20Thien_B1_2019_ESAR.pdf
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spelling	my-usm-ep.551802022-10-06T03:12:29Z Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder 2019-08-01 Lai, Ngoc Thien T Technology TA401-492 Materials of engineering and construction. Mechanics of materials TN Mining Engineering. Metallurgy Magnetorheological elastomers (MREs) are a new class of elastomeric composites consisting of a rubber matrix and magnetic particles. In this work MREs based on natural rubber (NR), waste natural rubber glove powder (WGP) and carbonyl iron particles (CIP) were successfully produced. The Taguchi method was utilised to study the effect of three pre-structuring factors - time, temperature and applied magnetic field on tan δ and tensile properties and predict the optimum combination of factors. Results indicated that magnetic field had the greatest influence on tan δ over 1 – 100 Hz frequency range while pre-curing time and magnetic field had the greatest influence on tan δ over 0.1 – 6% strain amplitude range. However, none of the factors exhibited significant influence on tensile properties. The optimum pre-structuring conditions were then applied to fabricate MREs with the addition of WGP in attempt to enhance damping. Dynamic mechanical analysis showed that addition of WGP improved dynamic performance of MREs. The highest tan δ was obtained with 10 phr WGP, with an increment of 10% in frequency sweep test and a 30% increment in amplitude sweep test. However, obvious gaps and particle pull-out were evidenced by SEM, suggesting weak interfacial bonding between CIP and WGP with the rubber matrix. Consequentially, bis-(3-triethoxysilylpropyl) tetrasulphane (TESPT) was used to improve the interfacial adhesion between rubber and CIP. Coupling occurring between rubber and CIP was identified by FTIR spectra, crosslink density by swelling test and the grafting percentage by thermogravimetric analysis. The optimum content of TESPT was found at 4 phr, with an average increment in tan δ of 40% over a 1 – 100 Hz frequency range and 13% over a 0.1 – 6% strain amplitude. 2019-08 Thesis http://eprints.usm.my/55180/ http://eprints.usm.my/55180/1/Fabrication%20And%20Characterisation%20Of%20Magnetorheological%20Elastomers%20Based%20On%20Natural%20Rubber%2C%20Carbonyl%20Iron%20And%20Waste%20Natural%20Rubber%20Glove%20Powder_Lai%20Ngoc%20Thien_B1_2019_ESAR.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology T Technology
spellingShingle	T Technology T Technology T Technology Lai, Ngoc Thien Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
description	Magnetorheological elastomers (MREs) are a new class of elastomeric composites consisting of a rubber matrix and magnetic particles. In this work MREs based on natural rubber (NR), waste natural rubber glove powder (WGP) and carbonyl iron particles (CIP) were successfully produced. The Taguchi method was utilised to study the effect of three pre-structuring factors - time, temperature and applied magnetic field on tan δ and tensile properties and predict the optimum combination of factors. Results indicated that magnetic field had the greatest influence on tan δ over 1 – 100 Hz frequency range while pre-curing time and magnetic field had the greatest influence on tan δ over 0.1 – 6% strain amplitude range. However, none of the factors exhibited significant influence on tensile properties. The optimum pre-structuring conditions were then applied to fabricate MREs with the addition of WGP in attempt to enhance damping. Dynamic mechanical analysis showed that addition of WGP improved dynamic performance of MREs. The highest tan δ was obtained with 10 phr WGP, with an increment of 10% in frequency sweep test and a 30% increment in amplitude sweep test. However, obvious gaps and particle pull-out were evidenced by SEM, suggesting weak interfacial bonding between CIP and WGP with the rubber matrix. Consequentially, bis-(3-triethoxysilylpropyl) tetrasulphane (TESPT) was used to improve the interfacial adhesion between rubber and CIP. Coupling occurring between rubber and CIP was identified by FTIR spectra, crosslink density by swelling test and the grafting percentage by thermogravimetric analysis. The optimum content of TESPT was found at 4 phr, with an average increment in tan δ of 40% over a 1 – 100 Hz frequency range and 13% over a 0.1 – 6% strain amplitude.
format	Thesis
qualification_level	Master's degree
author	Lai, Ngoc Thien
author_facet	Lai, Ngoc Thien
author_sort	Lai, Ngoc Thien
title	Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
title_short	Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
title_full	Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
title_fullStr	Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
title_full_unstemmed	Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder
title_sort	fabrication and characterisation of magnetorheological elastomers based on natural rubber, carbonyl iron and waste natural rubber glove powder
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2019
url	http://eprints.usm.my/55180/1/Fabrication%20And%20Characterisation%20Of%20Magnetorheological%20Elastomers%20Based%20On%20Natural%20Rubber%2C%20Carbonyl%20Iron%20And%20Waste%20Natural%20Rubber%20Glove%20Powder_Lai%20Ngoc%20Thien_B1_2019_ESAR.pdf
_version_	1747822318149697536

Fabrication And Characterisation Of Magnetorheological Elastomers Based On Natural Rubber, Carbonyl Iron And Waste Natural Rubber Glove Powder

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