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Preparation method of graphene oxide/barium titanyl oxalate particle electrorheological fluid material

A technology of barium titanyl oxalate and electrorheological fluid, which is applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of low shear stress and difficulty in meeting the requirements of practical industrial applications, and achieve uniform particle size and good anti-settling performance , the effect of easy access to raw materials

Active Publication Date: 2019-04-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional electrorheological fluid designed and prepared according to the theory of dielectric polarization has low shear stress, which is difficult to meet the requirements of practical industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Titanium tetrachloride and ice water are made into solution A by 0.2mol / L; (2) barium chloride and deionized water are made into solution B by 0.2mol / L; (3) oxalic acid and deionized water are made by 0.1 mol / L is made into solution C; (4) polyethylene glycol 800 and absolute ethanol are made into solution D at 8g / L; (5) graphene oxide is adjusted to a pH value of 9 with dilute ammonia water to make a suspension E ; (6) A solution and B solution are mixed uniformly at a volume ratio of 1:1, and solution D is added, and the above three solutions A:B:D=1.05:1:1, and stirred for 10 minutes; (7) Add to the above three solutions Suspension E, the above four solutions A:B:D:E=1.05:1:1:1; (8) Add C solution according to the ratio of the above four solutions, and add C drop by drop under ultrasonic magnetic stirring at a temperature of 55°C. Solution, the ratio of each solution is A:B:C:D:E=1.05:1:2:1:1, immediately there is precipitation; React at a constant temperature o...

Embodiment 2

[0022] (1) Titanium tetrachloride and ice water are made into solution A by 0.15mol / L; (2) barium chloride and deionized water are made into solution B by 0.15mol / L; (3) oxalic acid and deionized water are made by 0.15 mol / L is made into solution C; (4) polyethylene glycol 2000 and absolute ethanol are made into solution D at 5g / L; (5) graphene oxide is adjusted to a pH value of 9 with dilute ammonia water to make a suspension Solution E; (6) A solution and B solution are mixed uniformly at a volume ratio of 1:1, add solution D, the above three solutions A:B:D=1.05:1:1, stir for 30min; (7) The above three solutions Suspension E was added to the solution, the above four solutions A:B:D:E=1.05:1:1:1; (8) Add solution C according to the ratio of the above four solutions, and drop by drop under ultrasonic magnetic stirring at a temperature of 60°C Add C solution, the ratio of each solution is A:B:C:D:E=1.05:1:2:1:1, and there will be precipitation immediately; (9) After the dropwi...

Embodiment 3

[0025] (1) Titanium tetrachloride and ice water are made into solution A by 0.1mol / L; (2) barium chloride and deionized water are made into solution B by 0.1mol / L; (3) oxalic acid and deionized water are made by 0.1 mol / L to make solution C; (4) polyethylene glycol 4000 and absolute ethanol to make solution D at 4g / L; (5) adjust the pH value of graphene oxide to 9 with dilute ammonia water to make suspension E ; (6) A solution and B solution are mixed uniformly at a volume ratio of 1:1, and solution D is added, and the above three solutions A:B:D=1.05:1:1, and stirred for 10 minutes; (7) Add to the above three solutions Suspension E, the above four solutions A:B:D:E=1.05:1:1:1; (8) Add C solution according to the ratio of the above four solutions, and add C drop by drop under ultrasonic magnetic stirring at a temperature of 55°C. Solution, the ratio of each solution is A:B:C:D:E=1.05:1:2:1:1, immediately there is precipitation; React at a constant temperature of 200°C for 3 h...

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PUM

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Abstract

The invention discloses a preparation method of a graphene oxide / barium titanyl oxalate particle electrorheological fluid material. By taking a polyethylene glycol (PEG) dispersant, the polyethylene glycol (PEG) dispersant is added into an electrorheological fluid taking graphene oxide / barium titanyl oxalate compound nanoparticles as dielectric particles. The dispersant is polyethylene glycol, wherein the graphene oxide / barium titanyl oxalate compound nanoparticles are uniformly dispersed without being agglomerated. By adding the dispersant by means of a chemical precipitation method, under the joint action of polyethylene glycol and freeze drying, the graphene oxide / barium titanyl oxalate particles prepared by the method are good in dispersibility, are unlikely to agglomerate and adsorb water in air, and have a special shape. An electrorheological fluid is prepared from the dielectric particles and a continuous phase in a mass ratio of 3: 1, so that a relatively high rheological behavior can be obtained, that is, the yield stress of the electrorheological fluid is increased by 5.3 times in electric field intensity of 3kV / mm, and the graphene oxide / barium titanyl oxalate particle electrorheological fluid material has a good settling property.

Description

technical field [0001] The invention belongs to the technical field of electrorheological materials and belongs to a kind of intelligent materials, in particular to an electrorheological fluid in which the composite material obtained after modifying the surface of graphene oxide-barium titanyl oxalate particles with a dispersant is a dispersed phase. Background technique [0002] Electrorheological fluid is a kind of intelligent fluid composed of micro-nano dielectric particles dispersed in insulating liquid. Its rheological properties such as shear stress can rapidly and reversibly change by several orders of magnitude under the action of an external electric field. This unique characteristic makes electrorheological fluids have broad application prospects in electromechanical conversion devices such as shock absorbers, clutches, and control valves. However, traditional electrorheological fluids designed and prepared according to the theory of dielectric polarization have l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M161/00C10M169/04C10M177/00C10N40/14C10N30/04
CPCC10M161/00C10M169/044C10M177/00C10M2201/041C10M2201/14C10M2209/104C10M2227/09C10M2229/0415C10N2020/06C10N2030/04C10N2030/60C10N2040/16C10N2010/08C10N2010/04
Inventor 郭志猛杨芳隋延力林宁宁李丽丽陈存广叶四扬张欣悦李琴
Owner UNIV OF SCI & TECH BEIJING