CN107195418B - A kind of preparation method of water based magnetic rheologic liquid - Google Patents
A kind of preparation method of water based magnetic rheologic liquid Download PDFInfo
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- CN107195418B CN107195418B CN201710424719.1A CN201710424719A CN107195418B CN 107195418 B CN107195418 B CN 107195418B CN 201710424719 A CN201710424719 A CN 201710424719A CN 107195418 B CN107195418 B CN 107195418B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/447—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids
Abstract
The invention discloses a kind of water based magnetic rheologic liquids, belong to intellectual material technical field.The present invention is hydrolyzed by boiled silk and collects protein hydrolysate solution, then by melamine, urea and triethanolamine to protein surface grafted amino group group, it is modified by carbon disulfide, prepare aminodithioformic acid protein sequestrants, it is chelated with carbonyl iron dust and iron powder surface is effectively wrapped up, prepare the carbonyl iron dust of hydrophilic protein matter package, make its effectively dispersion in water, and make that long-chain is unfolded in its water, it prevents the hard sedimentation of magnetorheological fluid from improving the stability and redispersibility energy of water based magnetic rheologic liquid suspension system, there is wide prospect of the application.
Description
Technical field
The invention discloses a kind of water based magnetic rheologic liquids, belong to intellectual material technical field.
Background technique
Magnetorheological fluid is usually the suspension being made of ferromagnetic particle, the stabilizer etc. of carrier fluid, micron or submicron-scale
System.The characteristics of magnetorheological fluid is: in no externally-applied magnetic field, magnetorheological fluid is in Newtonian fluid state, and mobility is basic with carrier fluid
It is identical.After applying an external magnetic field, system viscosity moment increases, and becomes semisolid or solid state, body from free-flowing
The yield strength and apparent viscosity of system increase by 2~3 orders of magnitude.The properties such as thermodynamics, magnetic, light, sound of system can also be sent out simultaneously
Life significantly changes.Wherein the yield strength of system and apparent viscosity can be by the regulations of externally-applied magnetic field, with externally-applied magnetic field
The variation of intensity and change.This viscosity of magnetorheological fluid is referred to as magnetic rheology effect with the changed effect of externally-applied magnetic field.
Another feature of magnetorheological fluid is: after removing magnetic field, particle can promptly be restored to free state again, and entire material glues
Degree is also corresponding to be reduced, and is again in Newtonian fluid state, the variation of this completely reversibility can be completed within the time of Millisecond.Magnetic current
This controllable characteristics for becoming liquid allow to be used widely in many fields, such as machinery, electronics, aerospace, chemical industry, energy
Source, metallurgy, instrument, environmental protection, medical treatment etc..
The research of magnetorheological fluid is still primarily upon on oil base magnetorheological fluid at this stage, and about preparing water-base magnetic rheology
The report of liquid is less.In recent years, with the development of Technique of Magnetorheological Finishing, the research and development of water based magnetic rheologic liquid increasingly by
To attention." water is not only at low cost pollution-free " can also be such that fine abrasive is uniformly dispersed compared with other carrier fluids, while water is also
It with good cooling and washing lubricating action, and can promote the hydrolysis on polishing material surface, improve polishing efficiency, but it is existing
Some water-base magnetic rheology magnetism of material particle (generally carbonyl iron dust) density is big, with carrier fluid poor compatibility and be easy sedimentation, it is special
Be not after long-term stand easily agglomeration and difficult dispersion and lose rheomagnetic energy.Therefore, carry out water based magnetic rheologic liquid stability to grind
Study carefully, a kind of, water based magnetic rheologic liquid of not easily settled agglomeration good with carrier fluid compatibility is developed, to the technology content for improving Related product
And the market competitiveness, it has a very important significance.
Summary of the invention
Present invention mainly solves the technical issues of: it is heavy to be easy for existing water-base magnetic rheology material and carrier fluid poor compatibility
Drop, especially it is long-term stand after easily agglomeration and difficult dispersion and the problem of lose rheomagnetic energy, provide a kind of water base magnetic current
Become liquid.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of water based magnetic rheologic liquid is made of following parts by weight:
10~15 parts of modified protein chelating agent solutions, 1~2 part of ethyl orthosilicate, 0.5~1.0 part of carbonyl iron dust and 1~2
Part deionized water.
The carbonyl iron dust partial size is 200 mesh.
The modified protein chelating agent solution preparation step is, according to parts by weight, by 45~50 parts of deionized waters, 10
~15 parts of melamines, 5~8 parts of methanol, 5~10 parts of urea, 3~5 parts of triethanolamines and 9~10 portions of fibroin concentrates stir
Mixing is mixed, after adjusting pH to 8.0, alkalization protein liquid is obtained, by volume 1:12, carbon disulfide is added dropwise to alkalization protein liquid
In, it stands cooling after being added dropwise to complete and filters to get filtrate, be prepared.
The fibroin concentrate preparation step are as follows: according to parts by weight, by 45~50 parts of deionized water, 25~
After 30 parts of boiled silk and the mixing of 35~40 parts of absolute ethyl alcohol and stirring, heating water bath is simultaneously centrifugated, and collects supernatant liquor
And rotary evaporation is prepared.
The adjusting pH is using 0.5/L sodium hydroxide solution.
The carbon disulfide time for adding is 25~30min.
The beneficial effects of the present invention are:
(1) present invention using the hydroxyl on carbonyl iron dust surface as anchor point, by protein hydrolysis and grafted amino group group after, through at
Core polycondensation is simultaneously grown, and forms transition zone on carbonyl iron dust surface, since the polypeptide that protein hydrolyzes to form is backbone, makes it
After being coated on carbonyl iron dust surface, it is unfolded and prevents the hard sedimentation of magnetorheological fluid in water, improve the stabilization of water based magnetic rheologic liquid
Property and redispersibility energy；
(2) present invention is using protein as modified feedstock, and through hydrolysis fibroin and grafted amino group group is to protein surface,
Dithiocarbamate-based group is introduced on protein copolymer surface by nucleophilic addition, carries out effective chela with carbonyl iron dust
It closes, makes its surface grafting hydrophilic radical, it is effective in water to improve magnetorheological fluid for the excellent water based magnetic rheologic liquid with water component property
Dispersion performance improves the compatibility between material and carrier fluid.
Specific embodiment
First according to parts by weight, 45~50 parts of deionized water of selection, 25~30 parts of boiled silk and 35~40 parts
Dehydrated alcohol be placed in a beaker, be stirred and be placed in 1~2h of heating water bath at 55~60 DEG C, then stop heat simultaneously stand
It is cooled to room temperature, then is centrifugated 10~15min at 2500~3000r/min, collect supernatant liquor and be placed in 45~50 DEG C
Lower rotation is evaporated to the 1/3 of original volume, is prepared into fibroin concentrate, according to parts by weight, weighs 45~50 parts respectively and goes
Ionized water, 10~15 parts of melamines, 5~8 parts of methanol, 5~10 parts of urea and 3~5 parts of triethanolamines are placed in a beaker, stirring
Mixing be placed in 1~2h of heating water bath at 55~60 DEG C, after the completion of heating water bath, then add 9~10 parts fibroin it is dense
Contracting liquid is stirred simultaneously 2~3h of insulation reaction, is prepared into modified protein solution, choose 0.5mol/L sodium hydroxide into beaker
Solution adjusts modified protein pH value of solution to 8.0, is stirred 45~60min and is prepared into alkalization protein liquid, and then by volume 1:
12, carbon disulfide is added dropwise in alkalization protein liquid, control time for adding is 25~30min, after being added dropwise to complete, then 45~
1~2h of heating water bath, standing are cooled to room temperature at 50 DEG C, are filtered and are obtained filtrate, be prepared into modified protein chelating agent solution, by weight
Number meter is measured, weighs 45~50 parts of modified protein chelating agent solutions, 5~10 parts of ethyl orthosilicates and 3~5 part of 200 mesh carbonyl respectively
Base iron powder is placed in a beaker, and at 200~300W after 10~15min of ultrasonic disperse, 6~8h is dried in vacuo at 75~80 DEG C,
It then stands and is cooled to room temperature, 3~5h of ball milling at 250~300r/min crosses 250 meshes and is prepared into modified carbonyl iron powder, presses
Modified carbonyl iron powder is stirred with deionized water, is placed in 1~2h of grinding distribution in mortar at room temperature by mass ratio 4:1, then
At 250~300W after 10~15min of ultrasonic disperse, a kind of water based magnetic rheologic liquid can be prepared into.
Example 1
First according to parts by weight, 45 parts of deionized water, 25 parts of boiled silk and 35 parts of dehydrated alcohol is chosen to set
It in beaker, is stirred and is placed in heating water bath 1h at 55 DEG C, then stop heating and standing being cooled to room temperature, then
10min is centrifugated under 2500r/min, collection supernatant liquor is placed in rotation at 45 DEG C and is evaporated to the 1/3 of original volume, is prepared into
Fibroin concentrate weighs 45 parts of deionized waters, 10 parts of melamines, 5 parts of methanol, 5 parts of urea according to parts by weight respectively
It is placed in a beaker with 3 parts of triethanolamines, is stirred and is placed in heating water bath 1h at 55 DEG C, after the completion of heating water bath, then add
Add 9 parts of fibroin concentrate into beaker, is stirred simultaneously insulation reaction 2h, is prepared into modified protein solution, choose
0.5mol/L sodium hydroxide solution adjusts modified protein pH value of solution to 8.0, is stirred 45min and is prepared into alkalization protein liquid, with
Carbon disulfide is added dropwise in alkalization protein liquid by 1:12 by volume afterwards, and control time for adding is 25min, after being added dropwise to complete,
Heating water bath 1h, standing are cooled to room temperature at 45 DEG C again, are filtered and are obtained filtrate, be prepared into modified protein chelating agent solution, press
Parts by weight meter weighs 45 parts of modified protein chelating agent solutions, 5 parts of ethyl orthosilicates and 3 part of 200 mesh carbonyl iron dust respectively and is placed in
In beaker, at 200W after ultrasonic disperse 10min, it is dried in vacuo 6h at 75 DEG C, then stands and is cooled to room temperature, in 250r/
Ball milling 3h under min crosses 250 meshes and is prepared into modified carbonyl iron powder, in mass ratio 4:1, by modified carbonyl iron powder and deionized water
It is stirred, is placed in grinding distribution 1h in mortar at room temperature, then at 250W after ultrasonic disperse 10min, one can be prepared into
Kind water based magnetic rheologic liquid.
Example 2
First according to parts by weight, 48 parts of deionized water, 28 parts of boiled silk and 38 parts of dehydrated alcohol is chosen to set
It in beaker, is stirred and is placed in heating water bath 1h at 59 DEG C, then stop heating and standing being cooled to room temperature, then
13min is centrifugated under 2750r/min, collection supernatant liquor is placed in rotation at 48 DEG C and is evaporated to the 1/3 of original volume, is prepared into
Fibroin concentrate weighs 48 parts of deionized waters, 13 parts of melamines, 8 parts of methanol, 8 parts of urea according to parts by weight respectively
It is placed in a beaker with 4 parts of triethanolamines, is stirred and is placed in heating water bath 1h at 58 DEG C, after the completion of heating water bath, then add
Add 9 parts of fibroin concentrate into beaker, is stirred simultaneously insulation reaction 2h, is prepared into modified protein solution, choose
0.5mol/L sodium hydroxide solution adjusts modified protein pH value of solution to 8.0, is stirred 53min and is prepared into alkalization protein liquid, with
Carbon disulfide is added dropwise in alkalization protein liquid by 1:12 by volume afterwards, and control time for adding is 28min, after being added dropwise to complete,
Heating water bath 1h, standing are cooled to room temperature at 48 DEG C again, are filtered and are obtained filtrate, be prepared into modified protein chelating agent solution, press
Parts by weight meter weighs 48 parts of modified protein chelating agent solutions, 8 parts of ethyl orthosilicates and 4 part of 200 mesh carbonyl iron dust respectively and is placed in
In beaker, at 250W after ultrasonic disperse 13min, it is dried in vacuo 7h at 78 DEG C, then stands and is cooled to room temperature, in 275r/
Ball milling 4h under min crosses 250 meshes and is prepared into modified carbonyl iron powder, in mass ratio 4:1, by modified carbonyl iron powder and deionized water
It is stirred, is placed in grinding distribution 1h in mortar at room temperature, then at 275W after ultrasonic disperse 13min, one can be prepared into
Kind water based magnetic rheologic liquid.
Example 3
First according to parts by weight, 50 parts of deionized water, 30 parts of boiled silk and 40 parts of dehydrated alcohol is selected to be placed in
It in beaker, is stirred and is placed in heating water bath 2h at 60 DEG C, then stop heating and standing being cooled to room temperature, then in 3000r/
15min is centrifugated under min, collection supernatant liquor is placed in rotation at 50 DEG C and is evaporated to the 1/3 of original volume, is prepared into silk egg
White concentrate weighs 50 parts of deionized waters, 15 parts of melamines, 8 parts of methanol, 10 parts of urea and 5 parts according to parts by weight respectively
Triethanolamine is placed in a beaker, and is stirred and is placed in heating water bath 2h at 60 DEG C, after the completion of heating water bath, then adds 10 parts
Fibroin concentrate into beaker, be stirred and insulation reaction 3h, be prepared into modified protein solution, choose 0.5mol/L
Sodium hydroxide solution adjusts modified protein pH value of solution to 8.0, is stirred 60min and is prepared into alkalization protein liquid, then presses volume
Than 1:12, carbon disulfide is added dropwise in alkalization protein liquid, control time for adding is 30min, after being added dropwise to complete, then at 50 DEG C
Lower heating water bath 2h, standing are cooled to room temperature, and are filtered and are obtained filtrate, be prepared into modified protein chelating agent solution, in parts by weight
Meter weighs 50 parts of modified protein chelating agent solutions, 10 parts of ethyl orthosilicates and 5 part of 200 mesh carbonyl iron dust respectively and is placed in a beaker,
At 300W after ultrasonic disperse 15min, it is dried in vacuo 8h at 80 DEG C, then stands and is cooled to room temperature, the ball at 300r/min
5h is ground, 250 meshes is crossed and is prepared into modified carbonyl iron powder, in mass ratio 4:1, modified carbonyl iron powder and deionized water are stirred mixed
It closes, is placed in grinding distribution 2h in mortar at room temperature, then at 300W after ultrasonic disperse 15min, can be prepared into a kind of water base
Magnetorheological fluid.
Performance inspection is carried out to water based magnetic rheologic liquid made from example 1~3 and commercially available common water based magnetic rheologic liquid (comparative example)
It surveys, testing result is as follows:
In conclusion the present invention gained water based magnetic rheologic liquid have excellent anti-settling performance, while with carrier compatibility
Preferably, the rheomagnetic energy that can be played stably for a long time.
Claims (4)
1. a kind of water based magnetic rheologic liquid, it is characterised in that: be made of following parts by weight:
45~50 parts of modified protein chelating agent solutions, 5~10 parts of ethyl orthosilicates, 3~5 part of 200 mesh carbonyl iron dust and 13~15
Part deionized water；The modified protein chelating agent solution preparation step is, according to parts by weight, by 45~50 parts of deionizations
Water, 10~15 parts of melamines, 5~8 parts of methanol, 5~10 parts of urea, 3~5 parts of triethanolamines and 9~10 parts of fibroins are dense
Contracting liquid is stirred, and after adjusting pH to 8.0, obtains alkalization protein liquid, by volume 1:12, carbon disulfide is added dropwise to alkalization egg
It stands cooling in white liquor, after being added dropwise to complete and filters to get filtrate, be prepared.
2. a kind of water based magnetic rheologic liquid according to claim 1, it is characterised in that: the carbonyl iron dust partial size is 200
Mesh.
3. a kind of water based magnetic rheologic liquid according to claim 1, which is characterized in that the fibroin concentrate preparation
Step are as follows: according to parts by weight, by 45~50 parts of deionized water, 25~30 parts of boiled silk and 35~40 parts of anhydrous second
After alcohol is stirred, heating water bath is simultaneously centrifugated, and collects supernatant liquor and rotary evaporation is prepared.
4. a kind of water based magnetic rheologic liquid according to claim 1, it is characterised in that: the carbon disulfide time for adding is
25~30min.
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| CN103275796A (en) * | 2013-05-30 | 2013-09-04 | 东南大学 | Magnetorheological fluid |
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Effective date of registration: 20220118 Address after: 215000 floors 1-3, plant 1, building 4, No. 4425, Wuzhong Avenue, Hengjing street, Wuzhong Economic Development Zone, Suzhou, Jiangsu Province Patentee after: Zhongke Masco (Jiangsu) Intelligent Technology Co.,Ltd. Address before: 317700 Zhongcun 69, Yuanyuan Street, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: Wang Yuan |