CN1130675A - Mica series electric rheologic liquid - Google Patents
Mica series electric rheologic liquid Download PDFInfo
- Publication number
- CN1130675A CN1130675A CN 95118398 CN95118398A CN1130675A CN 1130675 A CN1130675 A CN 1130675A CN 95118398 CN95118398 CN 95118398 CN 95118398 A CN95118398 A CN 95118398A CN 1130675 A CN1130675 A CN 1130675A
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- mica
- transformer oil
- additive
- oil
- series electric
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Abstract
An electric rheologic liquid is prepared from mica (muscovite, biotite or phlogopite), insulating oil (silica oil or transformer oil) and additive (liquid crystal or ultrafine powder), and features wide availability of material, better overall performance, low cost and no abrasion to wall of container.
Description
The prescription that the present invention relates to a kind of mica series electric rheologic liquid belongs to technical field of novel materials with preparation technology.
Electrorheological fluid is a kind of solid-liquid blended suspension, and when extra electric field intensity is significantly less than certain threshold value, electrorheological fluid is in a liquid state; Be much higher than this threshold value, just become solid-state.Fringe time between the binary states is a millisecond magnitude, and this transformation is reversible, near critical electric field, can control the viscosity of this suspensoid very effectively with extra electric field.Just find that as far back as Winslow in 1974 some material has this electro rheological effect, but water is indispensable composition in traditional electrical rheology liquid, extremes of temperature all can make the performance of this electrorheological fluid lower greatly, and the stability of its performance is also very poor.Invented water-free electrorheological fluid up to the Block of Britain in 1988, made the practical application of electrorheological fluid become possibility.People have invented various electrorheological fluid subsequently.A good electrorheological fluid should have higher yielding stress and little leakage current.Comparatively successful electrorheological fluid comprises semi-conductor macromolecular material electrorheological fluid at present, but its synthetic cost height, and in a single day puncture, particle can burn and can't recover voluntarily, and the metallic substance electrorheological fluid is very big to the wall wearing and tearing, is difficult for keeping long-time running; The zeolites electrorheological fluid is cheap, but its leakage current is big, is 100 μ A/cm under the 2KV/mm
2
The objective of the invention is to design a kind of novel mica series electric rheologic liquid, it is compared with existing electrorheological fluid, have the good comprehensive performance.
Mica series electric rheologic liquid of the present invention is made up of mica, transformer oil and additive, and wherein the micaceous granularity is 1-100 μ m, and volume ratio is 5-50%, and the volume ratio of additive is 0-10%, and all the other are transformer oil.Above-mentioned mica is any in white mica, phlogopite, biotite, lithionite, zinnwaldite, margarite, vermiculite, the fluorophlogopite.Above-mentioned transformer oil is a silicone oil, any in transformer oil and the mineral oil.What above-mentioned additive was 4-heptyl-4 '-cyano group biphenyl and butylbenzoic acid in the eyeball base phenol ester is any, or any in titanium dioxide ultrafine powder and the barium titanate ultrafine powder.
The preparation method of this mica series electric rheologic liquid is: at first mica being ground to granularity is 1-100 μ m, again mica is heated to 100 ℃-250 ℃, then mica powder is added in the transformer oil, add additive at last, mix, be the mica electrorheological fluid.
Mica series electric rheologic liquid of the present invention has been compared the good comprehensive performance with existing electrorheological fluid.At first, mica absorbs water hardly, can guarantee that mica series electric rheologic liquid is an anhydrous electric rheological liquid.Secondly its leakage current is less, only is 1 μ A/cm under the 3KV/mm
2Magnitude.In addition, its yielding stress index is compared basic identical with above-mentioned various electrorheological fluid.But its cost is very low, and mica material is abundant at China's reserves, is convenient to large-scale application.At last, mica is a kind of inorganic materials, even still can not burn under the situation of field breakdown outside, and can recover rapidly.Mica quality softness, long-term dynamics is used can not cause wearing and tearing to wall yet.Therefore mica series electric rheologic liquid is a kind of electro-rheologic fluid material that the exploitation future is arranged very much.
Exemplify embodiments of the invention below.
Embodiment:
| Sequence number | Mica | Transformer oil | Additive | |||||
| Kind | Granularity (μ m) | Volume percent | Pre-heating temperature | Kind | Volume percent | Volume percent | ||
| 1 | White mica | ????45 | ?5％ | 200℃ | Silicone oil | 95％ | 0％ | |
| 2 | White mica | ????45 | ?20％ | 200℃ | Silicone oil | 80％ | 0％ | |
| 3 | White mica | ????45 | ?50％ | 120℃ | Mineral oil | 50％ | 0％ | |
| 4 | White mica | ????5 | ?20％ | 150℃ | Mineral oil | 80％ | 0％ | |
| 5 | White mica | ????15 | ?10％ | 100℃ | Mineral oil | 85％?? | 4-heptyl-4 '-cyano group biphenyl | 5％ |
| 6 | White mica | ????30 | ?30％ | 200℃ | Transformer oil | 62％ | Butylbenzoic acid is to eyeball base phenol ester | 8％ |
| 7 | White mica | ????100 | ?20％ | 200℃ | Transformer oil | 75％ | The titanium dioxide super-fine powder | 5％ |
| 8 | Phlogopite | ????5 | ?20％ | 120℃ | Mineral oil | 75％ | 4-heptyl-4 '-cyano group biphenyl | 5％ |
| 9 | Biotite | ????5 | ?40％ | 120℃ | Mineral oil | 55％ | 4-heptyl-4 '-cyano group biphenyl | 5％ |
| 10 | Lithionite | ????5 | ?20％ | 250℃ | Mineral oil | 75％ | 4-heptyl-4 '-cyano group biphenyl | 5％ |
| 11 | Zinnwaldite | ????5 | ?20％ | 200℃ | Mineral oil | 76％ | 4-heptyl-4 '-cyano group biphenyl | 4％ |
| 12 | Margarite | ????5 | ?20％ | 200℃ | Mineral oil | 77％ | 4-heptyl 4 '-cyano group biphenyl | 3％ |
| 13 | Vermiculite | ????5 | ?20％ | 150℃ | Mineral oil | 70％ | 4-heptyl 4 '-cyano group biphenyl | 10％ |
| 14 | Fluorophlogopite | ????5 | ?20％ | 100℃ | Mineral oil | 70％ | The barium titanate super-fine powder | 10％ |
| 15 | White mica | ????5 | ?20％ | 200℃ | Mineral oil | 75％ | The barium titanate super-fine powder | 5％ |
Claims (2)
1, a kind of mica series electric rheologic liquid is characterized in that electrorheological fluid is made up of mica, transformer oil and additive, and wherein the micaceous granularity is 1-100 μ m, and volume ratio is 5-50%, and the volume ratio of additive is 0-10%, and all the other are transformer oil; Above-mentioned mica is any in white mica, phlogopite, biotite, lithionite, zinnwaldite, margarite, vermiculite, the fluorophlogopite; Above-mentioned transformer oil is a silicone oil, any in transformer oil and the mineral oil; What above-mentioned additive was 4-heptyl-4 '-cyano group biphenyl and butylbenzoic acid in the eyeball base phenol ester is any, or any in titanium dioxide ultrafine powder and the barium titanate ultrafine powder.
2, a kind of method for preparing mica series electric rheologic liquid as claimed in claim 1, it is characterized in that this preparation method is that at first mica to be ground to granularity be 1-100 μ m, again mica is heated to 100 ℃-250 ℃, then mica powder is added in the transformer oil, add additive at last, mix, be the mica electrorheological fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95118398A CN1037911C (en) | 1995-12-01 | 1995-12-01 | Mica series electric rheologic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95118398A CN1037911C (en) | 1995-12-01 | 1995-12-01 | Mica series electric rheologic liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1130675A true CN1130675A (en) | 1996-09-11 |
| CN1037911C CN1037911C (en) | 1998-04-01 |
Family
ID=5081700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95118398A Expired - Fee Related CN1037911C (en) | 1995-12-01 | 1995-12-01 | Mica series electric rheologic liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037911C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089025C (en) * | 1999-09-30 | 2002-08-14 | 陶德华 | Process for preparing electric rheopectic liquid |
| CN100448962C (en) * | 2003-10-13 | 2009-01-07 | 西北工业大学 | Transition metal ion doped titanium dioxide electrorheological materials |
| CN111909754A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Composite lubricating composition and lubricating material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3536934A1 (en) * | 1985-10-17 | 1987-04-23 | Bayer Ag | ELECTROVISCOSE LIQUIDS |
| JPH07108989B2 (en) * | 1990-08-02 | 1995-11-22 | 株式会社コロイドリサーチ | Electrorheological fluid |
| CN1024099C (en) * | 1992-03-26 | 1994-03-30 | 清华大学 | Electric rheological fluid |
-
1995
- 1995-12-01 CN CN95118398A patent/CN1037911C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089025C (en) * | 1999-09-30 | 2002-08-14 | 陶德华 | Process for preparing electric rheopectic liquid |
| CN100448962C (en) * | 2003-10-13 | 2009-01-07 | 西北工业大学 | Transition metal ion doped titanium dioxide electrorheological materials |
| CN111909754A (en) * | 2020-08-26 | 2020-11-10 | 武汉理工大学 | Composite lubricating composition and lubricating material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1037911C (en) | 1998-04-01 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |