CN1526801A - Electric rheological fluid of nano composite polymethyl aniline/montmorillonite material and its prepn - Google Patents
Electric rheological fluid of nano composite polymethyl aniline/montmorillonite material and its prepn Download PDFInfo
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- CN1526801A CN1526801A CNA031145140A CN03114514A CN1526801A CN 1526801 A CN1526801 A CN 1526801A CN A031145140 A CNA031145140 A CN A031145140A CN 03114514 A CN03114514 A CN 03114514A CN 1526801 A CN1526801 A CN 1526801A
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- montmorillonite
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- polyphenylmethyl
- amine
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Abstract
The present invention relates to electric rheological fluid, and is especially electric rheological fluid of nano composite polymethyl aniline/montmorillonite material and its preparation. It has dispersed phase greatly different from composite particle in traditional core-shell structure and two components crossed in nano size. The mixture material has the advantages of high polarity and simple preparation process similar to inorganic material as well as small specific weight, soft texture and high deposition stability similar to organic material. The nano composite polymethyl aniline/montmorillonite material has improved electric rheological effect and mechanical value in strong electric field higher than those of polymethyl aniline and montmorillonite. The present invention has also the advantages of simple preparation process of emulsion mixing intercalation and in-situ polymerization and low cost.
Description
Technical field the present invention relates to a kind of composite nano polymer/clay material electrorheological fluid and technology of preparing thereof, particularly polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid.
The background technology electrorheological fluid is the suspension system that is formed in the transformer oil of low-k by the easy polarized dielectric particles dispersed that high-k, low electricity are led.At present, the performance of electrorheological fluid does not also reach the practicability requirement, and wherein topmost restraining factors are: the mechanics value under the electric field excitation is not high and resistance to settling is relatively poor.Research about discrete state material concentrates in inorganic oxide and two fields of organic high molecular polymer material mostly.Mineral-type materials once was the main research object of electrorheological fluid, but the ubiquity mechanical property is on the low side, shortcomings such as sedimentation resistance stability difference; Afterwards disperse phase that adopt organic polymer as electrorheological fluid more, organic polymer has higher thermostability, lower density and is easy to control the very big attention that is subjected to people owing to it as electrorheological fluid, although its mechanics value improves than inorganic materials and resistance to settling is better, still have certain distance apart from industrial applications.In recent years, the organic/inorganic hybrid materials are because its particular performances has caused people's extensive concern, especially organic polymer/stratiform polynite embeds hybrid materials because of it prepares simple, superior, the wide material sources of physical and mechanical properties, is considered to have most the matrix material of application prospect.Existing investigator attempts to give full play to the different specialities of organic materials and inorganic materials, realizing having complementary advantages, and then obtaining the good er material of over-all properties with the disperse phase of organic/inorganic composite material as electrorheological fluid.
Summary of the invention the purpose of this invention is to provide a kind of organic polymer and the mutual miscellaneous novel electrorheological of polynite liquid material, its disperse phase and traditional nucleocapsid structure formula composite particles tool are very different, show that two kinds of components are interlaced on nanoscale, this hybrid materials have the advantage that inorganic materials polarity is big, preparation process is easy and the little quality of organic materials proportion is soft, sedimentation resistance stability is good concurrently.
The object of the present invention is achieved like this for embodiment: adopt emulsion blending graft process preparation feedback technology.With the above grade raw material of chemical pure: the inorganic matrix raw material is made in polynite (MMT), and monomethylaniline is made organic raw material, ammonium persulphate ((NH
4)
2S
2O
8) be initiator, polymerized at room temperature is with the ammoniacal liquor (NH of certain pH value
3H
2O) soak the control specific conductivity.
At first, sodium-based montmorillonite is distributed in a certain amount of secondary deionized water, stirs into emulsion; Add a certain amount of monomethylaniline and hydrochloric acid, after the continuation dispersed with stirring, use a large amount of deionized water wash, HCl regulates the pH value, with ammonium persulphate ((NH
4)
2S
2O
8) be initiator, polymerized at room temperature a few hours, suction filtration, washing is at the NH of certain pH value
3H
2Soak suction filtration after a few hours, dry blackish green powder among the O.Being ground into fine powder with mortar, is 20% to mix preparation polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid with the powder that obtains with particle/methyl-silicone oil mass ratio at last.
A kind of mechanical property is higher, the excellent anhydrous electric rheological material of resistance to settling energy by having made between polyphenylmethyl amine insertion cheating engaging layer in the present invention, preparation is simple, with low cost, the emulsion blending graft process that adopts during operation can carry out at normal temperatures, equipment is not also had particular requirement, and the separation of product and last handling process are all easily realized.
Implementation procedure of the present invention and material property are described in detail by following examples and accompanying drawing:
Embodiment one: (pure MMT electrorheological fluid)
The polynite (MMT) that drying is crossed is mixed with inorganic pure MMT electrorheological fluid with methyl-silicone oil by powder/silicone oil mass ratio 20%.The relation of measuring its shear-stress and strength of electric field as shown in Figure 1.
Embodiment two: (pure PANI electrorheological fluid)
10 gram monomethylanilines and a certain amount of hydrochloric acid are distributed in a large amount of deionized waters, with ammonium persulphate ((NH
4)
2S
2O
8) be initiator, polymerized at room temperature 12 hours, suction filtration, washing is at the NH of pH=10
3H
2Soak suction filtration after 6 hours, dry blackish green powder among the O.Being ground into fine powder with mortar, is 20% to mix the powder that obtains with particle/methyl-silicone oil mass ratio at last, prepares pure PMANI electrorheological fluid.The relation of measuring its shear-stress and strength of electric field as shown in Figure 1.
Embodiment three: (polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid)
The 10g sodium-based montmorillonite is distributed in the 500mL deionized water, 80 ℃ are stirred 2h, add 2mL monomethylaniline and 0.04mol HCl then, continue to stir 6h at 80 ℃, be distributed in the 500mL deionized water after repeatedly with a large amount of deionized water wash, HCl regulates the pH value and is about 2, adds 1.6g (0.007mol) ammonium persulphate ((NH then
4)
2S
2O
8), polymerized at room temperature 12h under agitation, suction filtration, washing is at the NH of pH=10
3H
2Soak suction filtration after a few hours, dry blackish green powder among the O.Be ground into fine powder and be made into electrorheological fluid with mortar and promptly get polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid by powder/methyl-silicone oil mass ratio 20%.Relation between shearing resistance and shearing rate as shown in Figure 2, the relation between apparent viscosity and shearing rate has been tested the resistance to settling energy of this electrorheological fluid, as shown in Figure 4 as shown in Figure 3 simultaneously.
Description of drawings
(20 ℃, shearing rate is 5S to relation curve between the pure MMT of Fig. 1, pure PMANI and PMANI-MMT nano composite material electrorheological fluid static shear stress and strength of electric field (direct current)
-1)
The shearing resistance of a kind of PMANI-MMT nano composite material of Fig. 2 electrorheological fluid and the relation curve between shearing rate (20 ℃)
The relation curve (20 ℃) of the apparent viscosity of a kind of PMANI-MMT nano composite material of Fig. 3 electrorheological fluid and shearing rate
The settleability synoptic diagram of a kind of PMANI-MMT nano composite material of Fig. 4 electrorheological fluid
Claims (3)
1, a kind of polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid and preparation method thereof, the disperse phase of this material is: the polyphenylmethyl amine/polynite dielectric particle of nanoscale, the external phase base fluid is a methyl-silicone oil; The method for preparing this electrorheological fluid discrete state material is selected the emulsion blending graft process for use, and normal temperature is implemented polyreaction down, realizes mixing between organic polymer and inorganics.
2, polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid and preparation method thereof according to claim 1 is characterized in that dispersion particle is to be inserted between cheating engaging layer the particulate that in-situ polymerization forms on nanoscale by the monomethylaniline monomer; The mass ratio of polyphenylmethyl amine/polynite is 8-10% in the discrete state material.
3, a kind of amine of polyphenylmethyl according to claim 1/Nano composite material of montmorillonite electrorheological fluid and preparation method thereof is characterized in that preparation technology's method may further comprise the steps:
(1) select for use sodium-based montmorillonite (MMT), monomethylaniline as raw material; Ammonium persulphate ((NH
4)
2S
2O
8) be initiator, secondary deionized water is made solvent; Hydrochloric acid and ammoniacal liquor are made pH value conditioning agent.
(2) sodium-based montmorillonite is distributed in a certain amount of secondary deionized water, stirs into emulsion; Add a certain amount of monomethylaniline and hydrochloric acid, after the continuation dispersed with stirring, use a large amount of deionized water wash, HCl regulates the pH value, with ammonium persulphate ((NH
4)
2S
2O
8) be initiator, polymerized at room temperature a few hours, suction filtration, washing is at the NH of certain pH value
3H
2Soak suction filtration after a few hours, dry blackish green powder among the O.
(3) the blackish green powder that will obtain mixes by powder/silicone oil mass ratio 20% with methyl-silicone oil after being ground into certain fineness with mortar, promptly makes polyphenylmethyl amine/Nano composite material of montmorillonite electrorheological fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031145140A CN1526801A (en) | 2003-03-03 | 2003-03-03 | Electric rheological fluid of nano composite polymethyl aniline/montmorillonite material and its prepn |
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|---|---|---|---|
| CNA031145140A CN1526801A (en) | 2003-03-03 | 2003-03-03 | Electric rheological fluid of nano composite polymethyl aniline/montmorillonite material and its prepn |
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|---|---|
| CN1526801A true CN1526801A (en) | 2004-09-08 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469286B (en) * | 2007-12-28 | 2011-05-25 | 西北工业大学 | Polyaniline intercalated titanium oxide nano-tube ER fluid |
-
2003
- 2003-03-03 CN CNA031145140A patent/CN1526801A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469286B (en) * | 2007-12-28 | 2011-05-25 | 西北工业大学 | Polyaniline intercalated titanium oxide nano-tube ER fluid |
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