In this study, the rheological properties of multi-walled carbon nanotubes/silica shear thickening fluid suspensions (MWCNT/SiO 2 -STFs) with different concentrations were investigated. Through scanning electron microscopy, it was found that the MWCNTs had a strong adsorption on silica nanoparticles, and a “new particle group” containing MWCNTs was formed in the samples. The rheological results demonstrate that MWCNT/SiO 2 -STFs have significant shear thinning and shear thickening phenomena, and when the mass fraction of MWCNTs is 0.8%, the STFs have the best shear thickening performance; the viscosity increases by 191% while the critical shear rate decreases by 60.19%. The results also reveal that the rheological property of MWCNT/SiO 2 -STFs is effectively improved by increasing the plate spacing, particularly when their mass fraction is low. Moreover, the temperature sensitivity of MWCNT/SiO 2 -STFs is still dominated by the silica nanoparticles. Without affecting their temperature sensitivity, the MWCNTs can significantly enhance the shear thickening performance of silica-based STFs.

中文翻译：

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多壁碳纳米管/二氧化硅剪切增稠流体悬浮液的流变特性

在这项研究中，研究了不同浓度的多壁碳纳米管/二氧化硅剪切增稠流体悬浮液（MWCNT/SiO 2 -STFs）的流变特性。通过扫描电镜发现，多壁碳纳米管对二氧化硅纳米粒子有很强的吸附作用，样品中形成了包含多壁碳纳米管的“新粒子群”。流变学结果表明，MWCNT/SiO 2 -STFs具有明显的剪切增稠和剪切增稠现象，当MWCNTs的质量分数为0.8%时，STFs的剪切增稠性能最好；粘度增加 191%，而临界剪切速率降低 60.19%。结果还表明，通过增加板间距，MWCNT/SiO 2 -STFs 的流变性能得到有效改善，特别是当它们的质量分数较低时。此外，MWCNT/SiO 2 -STFs 的温度敏感性仍然由二氧化硅纳米粒子主导。在不影响其温度敏感性的情况下，多壁碳纳米管可以显着提高二氧化硅基 STF 的剪切增稠性能。