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Performance tuning of giant electrorheological fluids by interfacial tailoring
Zhichao Xu1, Yaying Hong, Mengying Zhang
1Materials Genome Institute, Shanghai University, Shanghai 200444, China. jinbowu@t.shu.edu.cn.
Soft Matter
|February 2, 2018
Summary
Surface modification of giant electrorheological (GER) fluids with silicone polyether optimized performance. Adjusting particle interactions balanced dispersion, current density, and electrorheological effects for industrial applications.
Area of Science:
- Materials Science
- Rheology
- Surface Chemistry
Background:
- Giant electrorheological (GER) fluids possess high yield stress due to particle surface polarization.
- Optimizing GER fluid performance is crucial for advanced applications.
- Particle surface properties significantly influence fluid behavior.
Purpose of the Study:
- To fine-tune the performance of GER fluids by modifying particle surfaces.
- To investigate the impact of silicone polyether addition on GER fluid properties.
- To achieve an optimal balance of competing factors for enhanced industrial utility.
Main Methods:
- Surface modification of GER particles using silicone polyether.
- Analysis of particle dispersion and solid-liquid interface interactions.
- Evaluation of electrorheological (ER) effect, current density, viscosity, and anti-sedimentation properties.
Main Results:
- Silicone polyether addition improved particle dispersion and reduced electrical current density at low concentrations.
- Increased silicone polyether led to steric hindrance, suppressing the GER effect.
- An optimal formulation was identified by balancing dispersion, current density, viscosity, anti-sedimentation, and ER effect.
Conclusions:
- Surface modification with silicone polyether offers a viable strategy to tune GER fluid performance.
- Tradeoffs among various properties are essential for optimizing GER fluids.
- The optimized GER fluids demonstrate repetitive stability, enabling broad industrial applications.
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