CN106906025A - A kind of flower-shaped TiO2Nano particle ER fluid material and preparation method thereof - Google Patents
A kind of flower-shaped TiO2Nano particle ER fluid material and preparation method thereof Download PDFInfo
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- 239000012530 fluid Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002245 particle Substances 0.000 title claims description 16
- 239000000463 material Substances 0.000 title abstract description 15
- 239000002105 nanoparticle Substances 0.000 claims abstract description 57
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 41
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229920002545 silicone oil Polymers 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 235000011054 acetic acid Nutrition 0.000 claims description 7
- 150000001243 acetic acids Chemical class 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229940008099 dimethicone Drugs 0.000 claims description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 5
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012296 anti-solvent Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 10
- 238000005119 centrifugation Methods 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 241000723353 Chrysanthemum Species 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/50—Lubricating compositions characterised by the base-material being a macromolecular compound containing silicon
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/001—Electrorheological fluids; smart fluids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
- C10M2229/0415—Siloxanes with specific structure containing aliphatic substituents used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/60—Electro rheological properties
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/14—Electric or magnetic purposes
- C10N2040/16—Dielectric; Insulating oil or insulators
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The present invention relates to a kind of flower-shaped TiO2Nano particle ER fluid material and preparation method thereof, the dispersed phase of the ER fluid is flower-shaped TiO2Nano particle, is prepared from using solvent-thermal method；The ER fluid that the material and methyl-silicone oil are made into has some excellent characteristics, including extremely strong electric rheological effect, good antisolvent precipitation stability, current density be low, chemical stability is good.Flower-shaped TiO is shown in accompanying drawing2The relation of nano particle ER fluid its shear stress and shear rate under different electric-field intensity.
Description
Technical field
The present invention relates to a kind of ER fluid and preparation method thereof, and in particular to a kind of flower-shaped TiO2Nano particle electric current becomes
Liquid and preparation method thereof.
Background technology
ER fluid (Electrorheological Fluids) is a kind of intellectual material to electric field quick response, is led to
It is often that the suspension system formed in the iknsulating liquid of low-k is dispersed in by the molecule of high-k.This kind of material
In the presence of extra electric field, between two parallel poles, be configured to chain or column structure, thus material rheological property bag
Include the transformation that shear stress, elastic modelling quantity, shear viscosity etc. can all occur from liquid to class solid, its viscosity and shear strength meeting
It is quick to improve, the characteristics of with Rapid reversible.Because energy consumption is low, the quality of controlled change makes it in vibration damping, machine to er material
The fields such as tool transmission, automatic control, electromechanical integration, micro-move device have huge application prospect.
The reversible rheological property of ER fluid essentially from discrete state material, currently used for the material of ER fluid dispersed phase
It is various, main polarized semiconducting inorganic thing material, such as TiO2,SiO2,BaTiO3；Conducting polymer materials, such as
PANI, PPy, these particles are orientated under electric field action along direction of an electric field, form chain structure.Received in numerous materials
Rice TiO2The electric current for being considered as a kind of great potential becomes discrete state material, and with many advantageous properties, such as dielectric high is normal
Number, preparation method is simple is various, advantages of nontoxic raw materials environmental protection.But TiO2Used as semiconductor, electrical conductivity is relatively low, is polarized under electric field action
Response is not strong, so improving its electrorheological property with the method such as mesoporous using doping more than forefathers.It is well known that dispersed phase nanometer
There is very big influence, the TiO of multilevel hierarchy for ER properties in the change of the surface topography of particle2Nano-particle show compared with
Specific surface high, very big effect is played to improving interparticle interfacial polarization, and then improving electric current change efficiency.
It is an object of the invention to provide a kind of flower-shaped TiO2Nano particle ER fluid, its dispersed phase is flower-shaped TiO2Nanometer
Particle, continuous phase is dimethicone.Flower-shaped TiO2Nano particle pattern is unique, and pattern is relatively similar in chrysanthemum, and surface is by intensive
Nanometer spininess structure composition, the surface diameter of flower-shaped particle is about 1~2 μm.And bayonet fittings are in cone-shaped, length exists
A diameter of 10-20 nanometers between 100-200 nanometers, bayonet fittings are radial to be evenly distributed on particle surface.
Flower-shaped TiO is prepared the present invention also aims to provide a kind of solvent-thermal method2The method of nano particle, preparation process
Belong to and prepared without template, be not added with any surfactant, preparation process is simple, raw material is easy to get, with the material and methyl-silicone oil
The ER fluid being made into has some excellent characteristics, including extremely strong electric rheological effect, good antisolvent precipitation stability, electricity
Current density is low, chemical stability is good.
The purpose of the present invention can be achieved through the following technical solutions：
Prepared ER fluid of the invention, its dispersed phase is flower-shaped TiO2Nano particle, continuous phase is dimethicone.On
The preparation technology for stating ER fluid is comprised the following steps：
(1) 1-2mL butyl titanates are added in 70-80mL glacial acetic acids, solution is then stirred into 10min to solution in breast
White, is then put into 180-200 DEG C of heating 1-5h in water heating kettle by solution, with absolute ethanol washing three times after natural cooling, so
Centrifugation afterwards obtains flower-shaped TiO2Nano particle, is put into baking oven and obtains solid powder after 60-80 DEG C of drying；
(2) during the solid powder that will be dried places tube furnace, 2h is calcined for 500 DEG C in air atmosphere；
(3) post-calcination sample and dimethicone are configured into electric current than 10wt% by the weight of solid particle and silicone oil to become
Liquid.
Brief description of the drawings
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of Fig. 12Nano particle SEM photograph
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of Fig. 22Nano particle TEM photos
180 DEG C of solvent-thermal methods of Fig. 3 prepare TiO2Nano particle XRD spectrum
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of Fig. 42Nano particle FTIR collection of illustrative plates
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of Fig. 52Nano particle TG-DSC curves
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of Fig. 62Nano particle ER properties figure
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 1.5h of Fig. 72Nano particle SEM photograph
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 1.5h of Fig. 82Nano particle TEM photos
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 1.5h of Fig. 92Nano particle ER properties figure
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 6h of Figure 102Nano particle SEM photograph
Flower-shaped TiO prepared by 180 DEG C of hydro-thermal 6h of Figure 112Nano particle ER properties figure
Spindle TiO prepared by 180 DEG C of hydro-thermal 24h of Figure 122Nano particle SEM photograph
Spindle TiO prepared by 180 DEG C of hydro-thermal 24h of Figure 132Nano particle ER properties figure
Fibrous TiO prepared by 150 DEG C of hydro-thermal 3h of Figure 142Nano particle SEM photograph
Fibrous TiO prepared by 150 DEG C of hydro-thermal 3h of Figure 152Nano particle ER properties figure
Specific embodiment
(the flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h of embodiment one2Nano particle)：
1.5mL butyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution are creamy white,
Then the solution is put into 180 DEG C of heating 3h in water heating kettle, with absolute ethanol washing three times after natural cooling, is then centrifuged for obtaining
Flower-shaped TiO2Nano particle, is put into baking oven that drying obtains solid powder at 70 DEG C；The solid powder that will be dried places tube furnace
In, calcine 2h for 500 DEG C in air atmosphere；The calcining sample and dimethicone are pressed the weight ratio of solid particle and silicone oil
10wt% is configured to ER fluid.
Fig. 1 and Fig. 2 are respectively flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h2Nano particle SEM and TEM photo, can from figure
Relatively similar in chrysanthemum with the pattern for finding out flower-shaped particle, surface is by intensive spininess structure composition, and the surface of flower-shaped particle is straight
Footpath is about 1~2 μm.Fig. 3 is flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h2The XRD of nano particle, by with standard Detitanium-ore-type
Titanium oxide card PDF#21-1272 contrasts understand that 25.37 ° of corresponding indices of crystallographic plane are (101), 37.03 ° of corresponding indices of crystallographic plane
It is (103) that 48.12 ° of corresponding indices of crystallographic plane are (200), the indices of crystallographic plane corresponding to 55.10 ° are (211), 62.74 ° of correspondences
The indices of crystallographic plane be (204), show that through the titanium oxide crystal formation of oversintering be Detitanium-ore-type, crystallinity is preferable.Fig. 4 is 180 DEG C of water
Flower-shaped TiO prepared by hot 3h2The FTIR figures of nano particle, 3400cm-1The stretching vibration peak of the corresponding titania surface O-H in left and right,
500-800cm-1Between there are the flexible peaks of O-Ti.Fig. 5 is flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h2The TG-DSC of nano particle is bent
Line chart, as can be seen from Figure, there is obvious endothermic peak between 320-420 DEG C in DSC curve, this endothermic peak correspondence titanium oxide
From amorphous to the transformation of anatase crystal.Be can be seen that from before 300 DEG C from TG curves, curve glides always, it may be possible to one
A little absorption are decomposed in the organic matter of particle surface.Fig. 6 is flower-shaped TiO prepared by 180 DEG C of hydro-thermal 3h2Nano particle base current becomes liquid
In different field intensity down cut intensity and the relation of shear rate, curve meets the model for first rising and declining rise again afterwards, and goes out
Existing significantly longer platform area, ER properties stabilization.It will be appreciated from fig. 6 that voltage is added to 3kV, and its current density is smaller,
Illustrate that better performances are worn in the resistance of the system ER fluid, shear stress is increased sharply under high voltages, illustrate the system electric current
Become liquid controllability under different voltages preferable.It will be appreciated from fig. 6 that when electric field is not added with, fluid is presented Newtonian fluid behavior, shearing should
Power is linearly increasing with shear rate increase；After added electric field, because particle polarizes in the electric field, mutually inhaled between dipole
Draw, particle is arranged in chain structure, fluid solidifies, the characteristic of Bingham fluid is presented, in 3 kilovoltages, 0.1-1S shearing speed
It is 429.5 that electric current becomes efficiency under rate, embodies extremely strong ER properties.
(the flower-shaped TiO prepared by 180 DEG C of hydro-thermal 1.5h of embodiment two2Nano particle)：
1.5mL butyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution are creamy white,
Then solution is put into 180 DEG C of heating 1.5h in water heating kettle, with absolute ethanol washing three times after natural cooling, centrifugation obtains flower-shaped
TiO2Nano particle, is put into baking oven that drying obtains solid powder at 70 DEG C, and the solid powder that will be dried is placed in tube furnace,
The lower 500 DEG C of calcinings 2h of air atmosphere.Fig. 7 and Fig. 8 are respectively flower-shaped TiO prepared by 180 DEG C of hydro-thermal 1.5h2Nano particle SEM and
TEM photos, it can be seen that nanoparticle surface pattern is flower-shaped, particle size is about 1~2 μm.Fig. 3 is 180 DEG C of water
Flower-shaped TiO prepared by hot 1.5h2The XRD of nano particle, is similarly anatase-type titanium oxide.Fig. 9 is 180 DEG C of hydro-thermal 1.5h systems
Standby flower-shaped TiO2Nano particle base current becomes liquid in different field intensity down cut intensity and the relation of shear rate, and electric current becomes efficiency
It is 94.5.
(the flower-shaped TiO prepared by 180 DEG C of hydro-thermal 6h of embodiment three2Nano particle)：
1.5mL butyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution are creamy white,
Then solution is put into 180 DEG C of heating 6h in water heating kettle, with absolute ethanol washing three times after natural cooling, centrifugation obtains flower-shaped
TiO2Nano particle, is put into baking oven that drying obtains solid powder at 70 DEG C, and the solid powder that will be dried is placed in tube furnace,
The lower 500 DEG C of calcinings 2h of air atmosphere.Fig. 3 is flower-shaped TiO prepared by 180 DEG C of hydro-thermal 6h2The XRD of nano particle, Figure 10 is 180
Flower-shaped TiO prepared by DEG C hydro-thermal 6h2Nano particle SEM photograph, Figure 11 is flower-shaped TiO prepared by 180 DEG C of hydro-thermal 6h2Nano particle
Base current becomes liquid in different field intensity down cut intensity and the relation of shear rate, and it is 64 that electric current becomes efficiency.
Example IV (spindle TiO prepared by 180 DEG C of hydro-thermal 24h2Nano particle)：
1.5mL butyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution are creamy white,
Then solution is put into 180 DEG C of heating 24h in water heating kettle, is centrifuged with absolute ethanol washing after natural cooling and obtains TiO2Nanometer
Grain, is put into baking oven that drying obtains solid powder at 70 DEG C, and the solid powder that will be dried is placed in tube furnace, in air atmosphere
500 DEG C of calcining 2h.Figure 12 is TiO prepared by 180 DEG C of hydro-thermal 24h2Nano particle SEM photograph, it can be seen that in 24h
Fusiform Titanium dioxide nanoparticle is obtained after hydro-thermal process.Figure 13 is TiO prepared by 180 DEG C of hydro-thermal 24h2Nano particle base electricity
In different field intensity down cut intensity and the relation of shear rate, it is 123 that electric current becomes efficiency to rheology liquid.
(the fibrous TiO prepared by 150 DEG C of hydro-thermal 3h of embodiment five2Nano particle)：
1.5mL tetraethyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution are creamy white,
Then solution is put into 150 DEG C of heating 3h in water heating kettle, with absolute ethanol washing three times after natural cooling, centrifugation obtains TiO2Receive
Rice grain, is put into baking oven that drying obtains solid powder at 70 DEG C, and the solid powder that will be dried is placed in tube furnace, in air gas
The lower 500 DEG C of calcinings 2h of atmosphere.Figure 14 is TiO prepared by 150 DEG C of hydro-thermal 3h2The SEM photograph of nano particle, it can be seen that
Because hydrothermal temperature is relatively low, fibrous Titanium dioxide nanoparticle is obtained, Figure 15 is TiO prepared by 150 DEG C of hydro-thermal 3h2Nanometer
Grain base current becomes liquid in different field intensity down cut intensity and the relation of shear rate, and it is 225 that electric current becomes efficiency.
Claims (4)
1. a kind of ER fluid, it is characterised in that the ER fluid dispersed phase is flower-shaped TiO2Nano particle, continuous phase is dimethyl
Silicone oil.
2. as claimed in claim 1 flower-shaped TiO2Nano particle ER fluid, it is characterised in that prepared by solvent-thermal method flower-shaped
TiO2Nano particle.
3. as claimed in claim 1 flower-shaped TiO2Nano particle ER fluid, it is characterised in that flower-shaped TiO2Nano particle and diformazan
The ER fluid that base silicone oil is configured to shows extremely strong ER properties.
4. flower-shaped TiO as claimed in claim 12Nano particle ER fluid, it is characterised in that preparation technology includes following step
Suddenly：
(1) 1.5mL butyl titanates are added in 75mL glacial acetic acids, then solution stirring 10min to solution is creamy white, then
Solution is put into 180 DEG C of heating 3h in water heating kettle, with absolute ethanol washing three times after natural cooling, is then centrifuged for obtaining flower-shaped
TiO2Nano particle, is put into baking oven that drying obtains solid powder at 70 DEG C；
(2) during the solid powder that will be dried places tube furnace, 2h is calcined for 500 DEG C in air atmosphere；
(3) calcining sample and dimethicone are configured to ER fluid by the weight of solid particle and silicone oil than 10wt%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671306A (en) * | 2017-10-16 | 2018-02-09 | 济南大学 | A kind of flower-shaped Ag@TiO of self assembly2The preparation method of nano particle |
| CN109590007A (en) * | 2018-12-24 | 2019-04-09 | 天津城建大学 | g-C3N4The flower-shaped TiO of nanometer sheet intercalation2Microballoon and preparation method thereof |
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| CN1451727A (en) * | 2002-04-12 | 2003-10-29 | 西北工业大学 | Electric titanium oxide rheological liquid contg. propanetriol/cationic surfactant |
| CN101486947A (en) * | 2008-12-31 | 2009-07-22 | 中国科学院宁波材料技术与工程研究所 | Nano titanium dioxide electrorheological liquid |
| KR20110105311A (en) * | 2010-03-18 | 2011-09-26 | 서울대학교산학협력단 | Fabrication of electrorheological fluids containing silica/titania core-shell nanoparticles with surfactants onto the surface |
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| CN107671306B (en) * | 2017-10-16 | 2019-08-06 | 济南大学 | A kind of flower-shaped Ag@TiO of self assembly2The preparation method of nano particle |
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