Implementation of functionalized multiwall carbon nanotubes on magnetorheological elastomer (original) (raw)
2018, Journal of Materials Science
This work studies the effects of loading various functionalized multiwall carbon nanotubes (carboxyl,-COOH-MWCNTs) on the morphological and the fielddependent rheological properties of magnetorheological elastomers (MREs). A new type of MRE, which is reinforced by various loading from 0 to 1.5 wt% of COOH-MWCNT, is fabricated and experimentally investigated. The morphology of COOH-MWCNT and MRE with COOH-MWCNTs is characterized using field emission scanning electron microscopy and transmission electron microscopy. The results indicate that the COOH-MWCNTs are well embedded and dispersed randomly in the MRE structures. The rheological properties under different magnetic fields are evaluated using parallel plate rheometers. The influence of COOH-MWCNT content on the viscoelastic performance of the MRE is systematically investigated. It is found that when a higher content of COOH-MWCNT (up to 1.0 wt%) is added in the MRE, the MRE exhibits a higher MR effect of up to 17.5%. It is also shown that COOH-MWCNT acts as a reinforcing agent that leads to an enhancement in MR performance. Abbreviation MR Magnetorheological MRE Magnetorheological elastomer MRF Magnetorheological fluid MRG Magnetorheological grease NR Natural rubber SMR Standard Malaysia rubber CIP Carbonyl iron particle COOH-MWCNT Carboxyl multiwall carbon nanotubes EPO Epoxidized palm oil G 0 Storage modulus G 0 0 Storage modulus (without magnetic field) FESEM Field emission scanning electron microscopy
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