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Updated: Apr 20, 2026
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
Published on: February 6, 2016
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New electrorheological fluid obtained from mercaptosilsesquioxane-modified silicate suspensions.
Jéssica A Marins1, Karim Dahmouche1, Bluma G Soares1
1Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas, Centro de Tecnologia, Bl. J, Ilha do Fundão 21945-970, Rio de Janeiro, RJ, Brazil.
Summary
Researchers developed a novel electro-rheological fluid using mercaptosilsesquioxane-modified silicate particles. This new fluid shows excellent performance under electric fields, comparable to conventional fluids.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
Background:
- Electro-rheological (ER) fluids offer tunable viscosity under electric fields.
- Developing novel ER fluids with enhanced performance is crucial for advanced applications.
Purpose of the Study:
- To synthesize and characterize a new silicate-based particle for electro-rheological applications.
- To evaluate the electro-rheological properties of a silicone oil suspension containing these particles.
Main Methods:
- Sol-gel process for synthesizing mercaptosilsesquioxane-modified silicate (SiO2/SSQ-SH) particles.
- Characterization using solid-state NMR, XRD, FTIR, FEG-SEM, and SAXS.
- Evaluation of electro-rheological performance in silicone oil suspension under electric fields (1-4 kV/mm).
Main Results:
- Hierarchical micro- to nanoscale structure of SiO2/SSQ-SH particles confirmed.
- Successful preparation of a novel electro-rheological fluid using SiO2/SSQ-SH particles in silicone oil.
- The developed ER fluid demonstrated a very good response to electric fields, comparable to conventional ER fluids.
Conclusions:
- Mercaptosilsesquioxane-modified silicate particles are effective components for electro-rheological fluids.
- The hierarchical structure of the particles contributes to the fluid's performance.
- This new ER fluid shows promise for applications requiring electrically tunable viscosity.
