Effect of various metal doping on the electroresponse of ecoresorbable smart fluids
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초록
내용
Ecoresorbable electrorheological (ER) fluids are fabricated by applying biodegradable metal (Mg, Zn, and Fe)-doped SiO2/TiO2 hollow nanoparticles (HNPs) as the electro-responsive material and soybean oil as the carrier oil. Doping the bioresorbable metals on the HNPs improves the dielectric properties and helps to achieve the optimum electrical conductivities, leading to the enhanced electro-response of the smart fluids. The ER behavior of the metal-doped smart fluids is elucidated based on the Wagner model. In addition, the ecoresorbable smart fluids exhibits high anti-settling properties, showing that the metal doping has a minimal impact on the colloidal stability of the fluids. Acknowledgement: This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2019R1C1C1007578) and the Technology Innovation Program (20004627) funded By the Ministry of Trade, Industry & Energy(MOTIE, Korea).