Rheological properties and the intrinsic mechanisms of fly ash/silicon-based shear thickening fluid

IF 2.3 3区工程技术 Q2 MECHANICS

Rheologica Acta Pub Date : 2024-06-18 DOI:10.1007/s00397-024-01459-7

Li Sun, Geng Wang, Chunwei Zhang, Tianqi Liang

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Abstract

We have found that the unique particle properties of fly ash can be applied to the modification of shear thickening fluid. In this paper, rheological properties and microscopic thickening mechanism of fly ash/silicon-based shear thickening fluid (subsequently abbreviated as FA/SiO₂-STF) are studied. Ultrasonic technology and mechanical stirring method were used to prepare FA/SiO₂-STF with different mass fractions of fly ash, and then rheometer was used to carry out steady-state rheological testing for FA/SiO₂-STF, and 4%FA/SiO₂-STF dynamic rheological test and temperature sensitivity testing, respectively. The thickening mechanism of FA/SiO₂-STF was analyzed by scanning electron microscope. The rheological test results show that the FA/SiO₂-STF with 4% fly ash content exhibits remarkable shear thickening effect. Finally, the relationship between the viscosity and shear rate of FA/SiO₂-STF is numerically described by a mathematical model, which can accurately reflect the viscosity thickening effect.

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粉煤灰/硅基剪切增稠流体的流变特性和内在机理

我们发现，粉煤灰独特的颗粒特性可应用于剪切稠化液的改性。本文研究了粉煤灰/硅基剪切稠化液（以下简称 FA/SiO2-STF）的流变特性和微观稠化机理。采用超声波技术和机械搅拌法制备了不同质量分数的粉煤灰/二氧化硅-STF，然后用流变仪分别进行了FA/SiO2-STF的稳态流变测试、4%FA/SiO2-STF的动态流变测试和温度敏感性测试。扫描电镜分析了 FA/SiO2-STF 的增稠机理。流变试验结果表明，粉煤灰含量为 4% 的 FA/SiO2-STF 具有显著的剪切增稠效果。最后，通过数学模型对 FA/SiO2-STF 的粘度与剪切速率之间的关系进行了数值描述，准确地反映了粘度增稠效果。

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来源期刊

Rheologica Acta 物理-力学

CiteScore

4.60

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： "Rheologica Acta is the official journal of The European Society of Rheology. The aim of the journal is to advance the science of rheology, by publishing high quality peer reviewed articles, invited reviews and peer reviewed short communications. The Scope of Rheologica Acta includes: - Advances in rheometrical and rheo-physical techniques, rheo-optics, microrheology - Rheology of soft matter systems, including polymer melts and solutions, colloidal dispersions, cement, ceramics, glasses, gels, emulsions, surfactant systems, liquid crystals, biomaterials and food. - Rheology of Solids, chemo-rheology - Electro and magnetorheology - Theory of rheology - Non-Newtonian fluid mechanics, complex fluids in microfluidic devices and flow instabilities - Interfacial rheology Rheologica Acta aims to publish papers which represent a substantial advance in the field, mere data reports or incremental work will not be considered. Priority will be given to papers that are methodological in nature and are beneficial to a wide range of material classes. It should also be noted that the list of topics given above is meant to be representative, not exhaustive. The editors welcome feedback on the journal and suggestions for reviews and comments."