Declining Performance of Silicone-Based Magnetorheological Elastomers after Accelerated Weathering.
Wibowo Wibowo,Bhre Wangsa Lenggana,Ubaidillah Ubaidillah,Dody Ariawan,Fitrian Imaduddin,Saiful Amri Mazlan,Seung-Bok Choi +6 more
TLDR
In this paper, the changes to the chemical and rheological properties of both isotropic and anisotropic magnetorheological elastomers after accelerated weathering were examined, and the morphological analysis results showed that the surface was rough and more cavities occurred.Abstract:
Magnetorheological elastomers (MRE)-based products are usually located in an area directly exposed to sunlight and rain. However, there is no specific research on the behavior of MRE after accelerated weathering. Therefore, in this study, the changes to the chemical and rheological properties of both isotropic and anisotropic MRE after accelerated weathering were examined. Treated and untreated specimens were compared. MRE specimens with 40% by weight CIP were prepared with no current excitation and another sample was prepared with 1.5 T of magnetic flux density. Each specimen was treated in an accelerated weathering machine, Q-Sun Xe-1 Xenon Test Chamber, under a UV light exposure cycle and water spray. A material characterization was carried out using FTIR and a rheometer to determine the changes to the chemical and rheological properties. The morphological analysis results showed that after the weather treatment, the surface was rough and more cavities occurred. The rheometer test results showed a significant decrease in the storage modulus of each treated MRE specimen, unlike the untreated MRE specimens. The decrease in the storage modulus value with currents of 0, 1, 2, and 3 Amperes was 66.67%, 78.9%, 85.2%, and 80.5%, respectively. Meanwhile, FTIR testing showed a change in the wave peak between the untreated and treated MRE specimens. Thermogravimetric analysis (TGA) also showed a decrease in MRE weight for each specimen. However, for both treated and untreated MRE specimens, the decrease in TGA was not significantly different. In all the tests carried out on the MRE samples, weather acceleration treatment caused significant changes. This is an important consideration for developers who choose silicone as the MRE matrix.read more
Citations
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Natural Weathering Effects on the Mechanical, Rheological, and Morphological Properties of Magnetorheological Elastomer (MRE) in Tropical Climate
Mohd Aidy Faizal Johari,Saiful Amri Mazlan,Ubaidillah Ubaidillah,Nur Azmah Nordin,Muntaz Hana Ahmad Khairi,Siti Aishah Abdul Aziz,Michal Sedlacik,Siti Asma’ Nikmat Leong +7 more
TL;DR: In this paper , the effects of weathering on magnetorheological elastomer (MRE) materials were evaluated under a tropical climate in Kuala Lumpur, Malaysia, for 30 days.
Journal ArticleDOI
Physicochemical Characterization and Antibacterial Activity of Titanium/Shellac-Coated Hydroxyapatite Composites
TL;DR: In this paper , powder metallurgy was used as a method to combine titanium and hydroxyapatite for use in implants, and X-ray diffraction and Fourier transform infrared (FTIR) analyses were used to achieve the chemical characterization of composites, whereby a weak diffraction peak was observed in the XRD spectrum of Ti-HA composites.
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