Abstract
Abstract This study examines the rheological properties of shear thickening fluid (STF) enhanced by additives such as multi-walled carbon nanotubes (MWCNTs), polyvinylpyrrolidone (PVP), and nano-silica (SiO2) at different mass fraction ratios. The rheological properties of the liquid (MWCNTs–PVP/SiO2–STF) and the effect of the rheological properties of the STF under different plate spacing of the rheometer were investigated. The optimal mass fraction mixing ratio was also studied. The MWCNTs–PVP/SiO2–STF system with different PVP mass fractions was fabricated using ultrasonic technology and the mechanical stirring method. Then, the steady-state rheological test of the MWCNTs–PVP/SiO2–STF system was carried out with the aid of the rheometer facility. Dynamic rheological and temperature sensitivity tests on the MWCNTs–PVP/SiO2–STF system with 0.1 and 0.15% PVP mass fractions were performed. The rheological test results show that the MWCNTs–PVP/SiO2–STF system has a significant shear thickening effect when the PVP mass fraction is increased from 0 to 0.15%. When the PVP mass fraction is 0.1% and the plate spacing is 1 mm, the system exhibits the best shear thickening performance. This is based on the following facts: the viscosity can be achieved as 216.75 Pa s; the maximum energy storage and energy consumption capabilities can be observed. As a result, PVP can significantly enhance the shear thickening performance of the MWCNTs/SiO2–STF system.
Highlights
This study examines the rheological properties of shear thickening fluid (STF) enhanced by additives such as multi-walled carbon nanotubes (MWCNTs), polyvinylpyrrolidone (PVP), and nano-silica (SiO2) at different mass fraction ratios
The results show that MWCNT–TiO2 exhibits shear thickening behavior
The shear thickening mechanism of the MWCNTs–PVP/SiO2–STF system was investigated through the rheological performance test
Summary
Abstract: This study examines the rheological properties of shear thickening fluid (STF) enhanced by additives such as multi-walled carbon nanotubes (MWCNTs), polyvinylpyrrolidone (PVP), and nano-silica (SiO2) at different mass fraction ratios. Wei et al [18] prepared the MWCNT/SiO2–STF by using the strong adsorption characteristics of multiwalled carbon nanotubes (MWCNTs) on nano-silica (SiO2) They explored the rheological properties of the new STF. The experimenters used PVP to coat silicon dioxide on the surface of ZnO, and the two were tightly combined through strong hydrogen bonds to form a continuous thin layer This new material can effectively reduce the photocatalytic activity and improves its material durability. The experiment determines the shear thickening performance of the optimal system under steady-state conditions by testing the MWCNTs–PVP/SiO2–STF system with different mixing ratios. The influence of temperature on the rheological properties of the MWCNTs–PVP/SiO2–STF system was explored
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