CN101469285A - Polyaniline nano-rod ER fluid - Google Patents
Polyaniline nano-rod ER fluid Download PDFInfo
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- CN101469285A CN101469285A CNA2007101597467A CN200710159746A CN101469285A CN 101469285 A CN101469285 A CN 101469285A CN A2007101597467 A CNA2007101597467 A CN A2007101597467A CN 200710159746 A CN200710159746 A CN 200710159746A CN 101469285 A CN101469285 A CN 101469285A
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Abstract
The invention relates to an electro-rheological fluid, in particular to a nanometer polyaniline electro-rheological fluid having rod-shaped appearance, wherein the dispersed phase of the electro-rheological fluid is a nanometer rod-shaped polyaniline dielectric particle, and the continuous phase base fluid thereof is methyl silicone oil. The electro-rheological fluid is characterized in that the outside diameter of the dispersed phase nanometer rod-shaped polyaniline dielectric particle is between 100 and 200 nanometers, and the length thereof is between 1 and 2 micrometers. Compared with the electro-rheological fluid of polyaniline particles, the polyaniline nanometer rod electro-rheological fluid has good suspension stability (attached figures show the sedimentation real-time photos (20 DEG C) of the polyaniline nanometer rod electro-rheological fluid and the polyaniline particle electro-rheological fluid which are placed for 200 hours), and a rheological performance test shows that the polyaniline nanometer rod electro-rheological fluid has better electro-rheological effect than the polyaniline particle electro-rheological fluid.
Description
Technical field the present invention relates to a kind of electrorheological fluid, particularly a kind of nano polyaniline electrorheological fluid with bar-shaped profile.
The background technology electrorheological fluid normally is scattered in the transformer oil of low-k and the suspension system that forms by the solid particulate of high-k, low conductivity.This system can realize liquid-solid transformation (title electric rheological effect) in moment under effect of electric field, and this transformation behavior has advantages such as quick, reversible, adjustable, so there is important use to be worth on automatization, vibroshock, clutch coupling, deoscillator, stepless speed-regulating device and optics and printing equipment.
Yet the subject matter that hinders the electro-rheological technology application at present is that low excessively, the anti-sedimentation capacity of yield strength of electrorheological fluid is poor, temperature stability is bad.Divide according to er material, electrorheological fluid can be divided into the inorganic particle rheobasis and become liquid, organic granular rheobasis change liquid, organic/inorganic composite particles rheobasis change liquid.It is big and to the device serious wear that the inorganic particle rheobasis becomes the liquid sedimentation; the weather resistance that organic/inorganic composite particles rheobasis becomes liquid still has problems; become liquid although developed nanometer organic/inorganic composite particles rheobasis recently, its mechanical property still needs further to improve.Organic electrorheological particle is to not wearing and tearing of device, and particularly the electrorheological fluid of making disperse phase with semiconductive polymer has Heat stability is good and specific conductivity, advantage that dielectric properties are adjustable, so the semiconductive polymer electrorheological fluid is subjected to people always and pays close attention to.Typical semiconductive polymer has polyaniline, polypyrrole, Polythiophene etc., and these semiconductive polymer electrorheological fluid have good thermostability and mechanical property.Yet the discrete particles of traditional semiconductive polymer electrorheological fluid is irregular micron particle mostly, and settleability is big, and this has had a strong impact on the application of this system.
Summary of the invention the invention provides a kind of electrorheological fluid that contains polyaniline nano-rod with electric rheological effect that well suspended stability becomes reconciled, it is characterized in that the polyaniline dielectric grain that this electrorheological fluid disperse phase is a nano bar-shape, the external phase base fluid is a methyl-silicone oil.Wherein to have external diameter be the 100-200 nanometer to disperse phase polyaniline particle, and length is the bar-shaped one dimension Nano structure of 1-2 micron, causes this material to possess good suspension stability; Simultaneously, one dimension Nano structure has also caused easier the gathering at the particulate tip of polarization charge to improve the particulate polarization response, makes this polyaniline nano-rod ER fluid have better electric rheological effect than traditional polyaniline particle electrorheological fluid.
Description of drawings
The stereoscan photograph of Fig. 1 embodiment one gained polyaniline nano bar material
The shear-stress of Fig. 2 embodiment one gained polyaniline nano-rod ER fluid and the relation of shearing rate (23 ℃)
The stereoscan photograph of Fig. 3 embodiment two gained polyaniline particulate materials
The shear-stress of Fig. 4 embodiment two gained polyaniline particle electrorheological fluid and the relation (23 ℃) of shearing rate
The rate of descent of Fig. 5 embodiment three gained polyaniline nano-rod ER fluids and polyaniline particle electrorheological fluid and timing relationship (20 ℃) Fig. 6 embodiment three gained polyaniline nano-rod ER fluids and polyaniline particle electrorheological fluid are placed the real-time photo of sedimentation (20 ℃) after 200 hours
Embodiment
The electrorheological fluid of a kind of polyaniline nano-rod provided by the present invention is obtained by following embodiment:
(1) 17.4 gram camphorsulfonic acids and 14.25 gram aniline monomers are dissolved in 750 ml deionized water, obtain clear solution one by stirring; 34.2 gram ammonium persulphates are dissolved in 375 ml deionized water, obtain clear solution two by stirring; Under agitation condition, solution two is poured in the solution one fast, continue stirring and stop after 30 seconds stirring, the mixing solutions standing and reacting obtained blackish green product in 24 hours;
(2) with blackish green product after filtration, washing removes unreacted reactant three times, ammonia soln with 1000 milliliter of 1 mol soaked 10 minutes this product then, filter once more and wash and remove remaining ammoniacal liquor three times, at last once, obtain the black polyaniline nanometer rod with absolute ethanol washing;
(3) polyaniline nano-rod is mixed for the 50mPas methyl-silicone oil after 24 hours with through the 150 ℃/viscosity smoked in 2 hours 150 ℃ of following vacuum-dryings, mixture becomes liquid through grinding and obtaining homodisperse polyaniline nano tube current in ultrasonic 5 hours.Under DC electric field, measure its rheologic behavio(u)r with HAAKE RS600 electrorheological instrument.
For comparing experiment, the polyaniline particle electrorheological fluid with irregular spherical shapes also is produced, and sees embodiment two.
The performance of implementation procedure of the present invention and material is by embodiment and description of drawings:
Embodiment one:
17.4 gram camphorsulfonic acids and 14.25 gram aniline monomers are dissolved in 750 ml deionized water, obtain clear solution one by stirring; 34.2 gram ammonium persulphates are dissolved in 375 ml deionized water, obtain clear solution two by stirring; Under agitation condition, solution two is poured in the solution one fast, continue stirring and stop after 30 seconds stirring, the mixing solutions standing and reacting obtained blackish green product in 24 hours; With blackish green product after filtration, washing removes unreacted reactant three times, ammonia soln with 1000 milliliter of 1 mol soaked 10 minutes this product then, filter once more and wash and remove remaining ammoniacal liquor three times, at last once with absolute ethanol washing, obtain the black polyaniline nanometer rod, its profile as shown in Figure 1, as seen its external diameter is the 100-200 nanometer, length is the 1-2 micron; Take by weighing 5 these polyaniline nano-rods of gram and mixes for the 50mPas methyl-silicone oil through the 150 ℃/viscosity smoked in 2 hours with 50 milliliters after 24 hours 150 ℃ of following vacuum-dryings, mixture is through grinding and obtained in ultrasonic 5 hours homodisperse polyaniline nano tube current change liquid.Under DC electric field, measure its rheologic behavio(u)r with HAAKE RS600 electrorheological instrument, the shear-stress of electrorheological fluid and the relation of shearing rate are as shown in Figure 2.
Embodiment two:
With 17.4 the gram camphorsulfonic acids and 14.25 the gram aniline monomers be dissolved in 750 milliliters of secondary deionized water, under agitation condition, obtain clear solution-; 34.2 gram ammonium persulphates are dissolved in 375 milliliters of secondary deionized water, under agitation condition, obtain clear solution two; Under agitation condition, solution two is dripped (one about 0.02 milliliter of per second) in solution one, continue high-speed stirring and obtained blackish green precipitated product in 24 hours; Blackish green precipitated product after filtration and wash three times and remove unreacted reactant, ammonia soln with 1000 milliliter of 1 mol soaked 10 minutes this product then, filter once more and wash and remove remaining ammoniacal liquor three times, at last once with absolute ethanol washing, obtain the black polyaniline nanometer rod, its profile as shown in Figure 3.Take by weighing 5 gram polyaniline nano-rods and mixes for the 50mPas methyl-silicone oil through the 150 ℃/viscosity smoked in 2 hours with 50 milliliters after 24 hours 150 ℃ of following vacuum-dryings, mixture also obtained homodisperse polyaniline nano-rod ER fluid in ultrasonic 5 hours through grinding.Under DC electric field, measure its rheologic behavio(u)r with HAAKE RS600 electrorheological instrument, the shear-stress of electrorheological fluid and the relation of shearing rate are as shown in Figure 4.Comparison diagram 2 and Fig. 4, visible polyaniline nano-rod ER fluid has better electric rheological effect than polyaniline particle electrorheological fluid.
Embodiment three:
Take by weighing by black polyaniline nanometer rod 2.5 grams of embodiment one preparation and mixes for the 50mPas methyl-silicone oil through the 150 ℃/viscosity smoked in 2 hours with 50 milliliters after 24 hours 150 ℃ of following vacuum-dryings, mixture is through grinding and ultra-sonic dispersion acquisition in 5 hours is finely dispersed and the polyaniline nano-rod ER fluid of further dilution; Take by weighing by black polyaniline particle 2.5 grams of embodiment two preparation and mixes for the 50mPas methyl-silicone oil through the 150 ℃/viscosity smoked in 2 hours with 50 milliliters after 24 hours 150 ℃ of following vacuum-dryings, mixture is through grinding and acquisition in ultrasonic 5 hours is homodisperse and the polyaniline particle electrorheological fluid of further dilution; Get 5 milliliters of above-mentioned polyaniline nano-rod ER fluids and polyaniline particle electrorheological fluid is put into graduated cylinder, the suspension stability that leaves standstill and measure two kinds of electrorheological fluid with direct observational method as shown in Figure 5, the real-time photo of suspension stability of the electrorheological fluid that after 200 hours, obtains as shown in Figure 6, visible polyaniline nano-rod ER fluid has obviously good suspension stability.
Claims (2)
1, a kind of polyaniline nano-rod ER fluid, its disperse phase are the polyaniline dielectric grain of nano bar-shape, and the external phase base fluid is a methyl-silicone oil; The external diameter that it is characterized in that the polyaniline dielectric grain of disperse phase nano bar-shape is the 100-200 nanometer, and length is the 1-2 micron.
2, a kind of according to claim 1 polyaniline nano-rod ER fluid is characterized in that this polyaniline nano-rod ER fluid is prepared by following steps:
(1) 17.4 gram camphorsulfonic acids and 14.25 gram aniline monomers are dissolved in 750 ml deionized water, obtain clear solution one by stirring; 34.2 gram ammonium persulphates are dissolved in 375 ml deionized water, obtain clear solution two by stirring; Under agitation condition, solution two is poured in the solution one fast, continue stirring and stop after 30 seconds stirring, the mixing solutions standing and reacting obtained blackish green product in 24 hours;
(2) with blackish green product after filtration, washing removes unreacted reactant three times, ammonia soln with 1000 milliliter of 1 mol soaked 10 minutes this product then, filter once more and wash and remove remaining ammoniacal liquor three times, at last once, obtain the black polyaniline nanometer rod with absolute ethanol washing;
(3) polyaniline nano-rod is mixed for the 50mPas methyl-silicone oil after 24 hours with through the 150 ℃/viscosity smoked in 2 hours 150 ℃ of following vacuum-dryings, mixture becomes liquid through grinding and obtaining homodisperse polyaniline nano tube current in ultrasonic 5 hours.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108316A (en) * | 2009-12-23 | 2011-06-29 | 西北工业大学 | Titanium-oxide-coated polyaniline nanotube electrorheological fluid |
| CN101775111B (en) * | 2010-01-25 | 2011-09-28 | 吉林大学 | Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments |
| CN103756756A (en) * | 2014-01-17 | 2014-04-30 | 青岛科技大学 | LDH/polyaniline nano composite material electrorheological fluid and preparation method thereof |
| CN104232251A (en) * | 2014-08-28 | 2014-12-24 | 陕西师范大学 | Polyaniline composite electrorheological fluid |
| CN104538121A (en) * | 2014-11-27 | 2015-04-22 | 长春理工大学 | Photo-electro-magnetic three-function banded coaxial nano cable array and preparation method thereof |
| CN104892935A (en) * | 2015-05-21 | 2015-09-09 | 安徽大学 | Method for synthesizing polyaniline nanotubes |
| CN107603712A (en) * | 2017-10-23 | 2018-01-19 | 青岛科技大学 | A kind of flower-shaped polyaniline nanoparticles ER fluid and preparation method thereof |
| CN108473906A (en) * | 2015-12-04 | 2018-08-31 | 旭化成株式会社 | ER fluid and electric equipment |
-
2007
- 2007-12-28 CN CNA2007101597467A patent/CN101469285A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108316A (en) * | 2009-12-23 | 2011-06-29 | 西北工业大学 | Titanium-oxide-coated polyaniline nanotube electrorheological fluid |
| CN101775111B (en) * | 2010-01-25 | 2011-09-28 | 吉林大学 | Method for preparing fully organic high-dielectric copolymers with side chains containing polyaniline chain segments |
| CN103756756A (en) * | 2014-01-17 | 2014-04-30 | 青岛科技大学 | LDH/polyaniline nano composite material electrorheological fluid and preparation method thereof |
| CN104232251A (en) * | 2014-08-28 | 2014-12-24 | 陕西师范大学 | Polyaniline composite electrorheological fluid |
| CN104232251B (en) * | 2014-08-28 | 2016-08-17 | 陕西师范大学 | polyaniline composite electrorheological fluid |
| CN104538121A (en) * | 2014-11-27 | 2015-04-22 | 长春理工大学 | Photo-electro-magnetic three-function banded coaxial nano cable array and preparation method thereof |
| CN104892935A (en) * | 2015-05-21 | 2015-09-09 | 安徽大学 | Method for synthesizing polyaniline nanotubes |
| CN104892935B (en) * | 2015-05-21 | 2017-03-01 | 安徽大学 | A kind of method of synthesized polyaniline nanotube |
| CN108473906A (en) * | 2015-12-04 | 2018-08-31 | 旭化成株式会社 | ER fluid and electric equipment |
| CN108473906B (en) * | 2015-12-04 | 2021-12-10 | 旭化成株式会社 | Electrorheological fluid and electrical equipment |
| CN107603712A (en) * | 2017-10-23 | 2018-01-19 | 青岛科技大学 | A kind of flower-shaped polyaniline nanoparticles ER fluid and preparation method thereof |
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