Anti-settling electrorheological fluid and control method thereof
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An electrorheological fluid and anti-sedimentation technology, which is applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of slow apparent sedimentation speed and difficult dispersion, achieve excellent electrorheological efficiency, reasonable proportioning, and improve anti-settling sexual effect
Pending Publication Date: 2018-06-12
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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In the soft sedimentation process, the apparent sedimentation speed is fast, forming a sediment with a large sedimentation volume, but it is easy to redisperse after stirring and become a uniform system; the apparent sedimentation speed is slow in the caking sedimentation process, and the sedimentation volume is also small, but Forms hard stacked precipitates that are difficult to redisperse
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Embodiment 1
[0060] a) Base fluid
[0061] Base fluid components: chlorinated paraffin (6v%), fluorinated silicone oil (70v%) and dimethicone (24v%) are mixed uniformly to obtain a compound base fluid;
[0062] b) Particles: TiO 2 / Urea particles; 28% by mass
[0063] c) Dispersant: 0.5×10 -3 mol / L SDBS
[0064] No precipitation was seen for 30 days when an electric field of 2kV / mm was applied.
Embodiment 2
[0066] a) Preparation of base fluid
[0067] Mix chlorinated paraffin (6v%), fluorinated silicone oil (80v%) and dimethicone (14v%) to obtain a compound base liquid;
[0068] b) Particles: TiO 2 / Urea particles, 28% by mass;
[0069] c) Dispersant: 0.5×10 -3 mol / L SDBS
[0070] d) No precipitation was seen for 30 days when an electric field of 1kV / mm was applied.
Embodiment 3
[0072] a) Preparation of base fluid
[0073] Mix chlorinated paraffin (10v%), fluorinated silicone oil (50v%) and dimethicone (40v%) to obtain a compound
[0074] Base fluid
[0075] b) Particles: TiO 2 / Urea particles, 28% by mass;
[0076] c) Dispersant: 0.5×10 -3 mol / L SDBS
[0077] d) No precipitation was seen for 30 days when an electric field of 1.5kV / mm was applied.
[0078] The above-mentioned titanium-oxygen-based fine particles have a particle size of 30 to 35 nm.
[0079] The viscosity of the base fluid composed of the above fluorinated silicone oil, chlorinated paraffin, and dimethyl silicone oil is 400~600×10 - 3 Pa.s.
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Abstract
Anti-settling electrorheological fluid is characterized by being preared from dispersed particles, base liquid and an additive, wherein the dispersed particles adopts titanium-oxygen particles; the base liquid adopts silicon fluoride oil and chlorinated paraffin; and the additive is a surfactant containing a polar functional group. The molecular structures of the dispersed particles, the base liquid and the additive are reasonably designed, components and a proportion are optimized, the base liquid with large density and long chain is designed to improve the suspending property of the particles, and the anti-settling property is improved; the surfactant containing the polar functional group serves as the additive, so the strength and the anti-settling property of electrorheological fluid are greatly improved, the electrorheological fluid with high anti-settling property is obtained, and the 30-day anti-settling stability is more than or equal to 99 percent; furthermore, a device capable of applying an electric field is additionally arranged at a storage position of the electrorheological fluid, and the problem of settling is completely solved through the action of the electric field. The proportion is reasonable, the raw materials are safe and environmentally friendly, the electrorheological fluid has excellent electrorheological efficiency, also has high anti-settling property, and has wide application prospect.
Description
Technical field [0001] The invention belongs to the technical field of electrorheological fluids, and relates to an anti-settling electrorheological fluid and a control method thereof. Background technique [0002] Electrorheological fluid is an important smart material. It is a suspension composed of dispersed particles, base fluid, surfactants, etc., with controlled changes in quality. Its yield stress and elastic modulus vary with the applied electric field. Change and change. Electrorheological fluids have huge application prospects in the fields of vibration reduction, mechanical transmission, automatic control, mechatronics, and micro-drive. However, due to some shortcomings in the use process, such as the sedimentation of particles, low yield stress, wear of the particles to the device, and poor temperature effect leading to narrow working temperature zones, etc., it limits its wide application. [0003] Electrorheological fluid under the action of electric field, its part...
Claims
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