CN110093036A - The preparation method of the magnetorheological clay of shear hardening - Google Patents
The preparation method of the magnetorheological clay of shear hardening Download PDFInfo
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- CN110093036A CN110093036A CN201910405089.2A CN201910405089A CN110093036A CN 110093036 A CN110093036 A CN 110093036A CN 201910405089 A CN201910405089 A CN 201910405089A CN 110093036 A CN110093036 A CN 110093036A
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- preparation
- magnetorheological
- clay
- magnetorheological clay
- shear hardening
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/398—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing boron or metal atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
Abstract
The invention discloses a kind of preparation methods of the magnetorheological clay of shear hardening, are related to intelligent composite field.It the described method comprises the following steps: by carbonyl iron dust, benzoyl peroxide and glycerol dispersion into silicon boron copolymer, being dried to obtain magnetorheological clay.The present invention can not only passive response external environmental excitation, realize adaptive, self-reinforcing function, moreover it is possible to realize that orientation is controllable under magnetic fields, have broad application prospects in the antidetonation vibration damping field of large scale civil engineering structure.
Description
Technical field
The present invention relates to intelligent composite fields, the specially preparation method of the magnetorheological clay of shear hardening.
Background technique
In engineering structure vibration control field, magnetorheological materials and shear thickening materials have been developed as most future
Two class intellectual materials, various vibration absorbers or intelligent execution unit based on these two types of material developments can be widely applied to large-scale soil
The dynamic characteristics of structure is altered or modified in wood engineering structure.
Magnetorheological materials and shear thickening materials are respectively provided with respective advantage and disadvantage, and magnetorheological materials can rely on external magnetic
, self-regulating function is provided for vibration damping executive device, realizes the controllable target of performance, compensating for shear thickening materials performance can not
The deficiency of control；And shear thickening materials can be motivated by dynamic response external environment, help vibration damping executive device realize adaptively and
The function of self-reinforcing can effectively improve magnetorheological materials and power off unshielded disadvantage.At this stage, magnetorheological materials at
For the important packing material of bridge energy-consumption damper, shear thickening materials are then mainly used in the limiting device of bridge, therefore, knot
The characteristics of closing two class materials, the rate sensitivity characteristic of unified shear thickening materials and the magnetic sensitive characteristic of magnetorheological materials are integrated,
A kind of multi-functional oscillation damping and energy dissipating material is researched and developed, there is highly important theory significance and engineering practical value.
Summary of the invention
Prior art there are aiming at the problem that, it is an object of that present invention to provide a kind of magnetorheological clay of shear hardening
Preparation method, to solve the problems, such as that material existing in the prior art cannot have both rate sensitivity characteristic and magnetic sensitive characteristic simultaneously.
To achieve the goals above, the present invention adopts the following technical scheme that realize:
A kind of preparation method of the magnetorheological clay of shear hardening, the described method comprises the following steps:
By carbonyl iron dust, benzoyl peroxide and glycerol dispersion into silicon boron copolymer, it is dried to obtain magnetorheological clay.
Further, the silicon boron copolymer, carbonyl iron dust, benzoyl peroxide, glycerine mass ratio be 20:25-
35:0.1-0.3:1-3。
Further, the drying temperature of the magnetorheological clay is 110-130oC；Drying time is 20-40 min.
Further, the mass fraction of the carbonyl iron dust is 50-70%.
Further, the benzoyl peroxide passes through in 110-130oVulcanizing treatment 20-40 min is obtained at a temperature of C.
Further, the preparation method of the silicon boron copolymer includes:
Boric acid is dried to obtain pyroboric acid；
By the pyroboric acid with dimethyl silicone polymer, dehydrated alcohol by mixing, being dried to obtain silicon boron copolymer.
Further, the drying temperature of the boric acid is 160-180oC；Drying time is 1.5 ~ 2 h.
Further, the mass ratio of the dimethyl silicone polymer, pyroboric acid and dehydrated alcohol is 80:10-20:4-6.
Further, the drying temperature of the silicon boron copolymer is 210-230oC；Drying time is 15 ~ 20 h.
Further, the dimethyl silicone polymer viscosity is 300-400 mm2/s。
Compared with prior art, the beneficial effects of the present invention are:
The present invention is by preparing one for the magnetic sensitive characteristic combination of the rate sensitivity characteristic of shear thickening materials and magnetorheological materials
The new magnetorheological clay of material-shear hardening of kind, the material are provided simultaneously with the rate sensitivity characteristic and magnetic current of shear thickening materials
Becoming the magnetic sensitive characteristic of material, the magnetorheological clay of the shear hardening of preparation compensates for the uncontrollable problem of shear thickening materials performance,
And it effectively improves magnetorheological materials and powers off unshielded disadvantage.
Detailed description of the invention
Fig. 1 is the storage modulus of the magnetorheological clay of shear hardening prepared by the present invention and the graph of relation of angular frequency；
Fig. 2 is the storage modulus of the magnetorheological clay of shear hardening prepared by the present invention and the graph of relation of magnetic induction intensity.
Specific embodiment
Combined with specific embodiments below, the present invention will be further elaborated.It should be understood that these embodiments are only used for
The bright present invention rather than for limiting the scope of the invention.
Embodiment 1
It prepares silicon boron copolymer: weighing the boric acid of 25 g with electronic balance, be placed in a vacuum drying oven, held at a temperature of 170 DEG C
It is continuous to heat 2 hours to get pyroboric acid is arrived；Weighing viscosity with electronic balance is 350 mm280 g of dimethyl silicone polymer, the coke of/s
5 g of 15 g of boric acid and dehydrated alcohol first passes through electric mixer and stirs 10 minutes, is subsequently placed in vacuum oven, 220
Continuous heating 18 hours at a temperature of DEG C；It cools down and obtains silicon boron copolymer.
Obtained silicon boron copolymer can show softness in slow stretching, and can occur when Rapid stretching smooth disconnected
Face.
It prepares the magnetorheological clay of shear hardening: weighing 30 g of carbonyl iron dust, vulcanization that mass fraction is 60% with electronic balance
0.2 g of agent benzoyl peroxide, 2 g of plasticizer glycerine are distributed in 20 g silicon boron polymer matrices；By silicon boron copolymer, carbonyl
Base iron powder, vulcanizing agent benzoyl peroxide, plasticizer glycerine are uniformly mixed；It is placed in a vacuum drying oven, in 120 DEG C of temperature
Lower continuous heating 30 minutes；It is taken out after cooling and obtains the magnetorheological clay of shear hardening.
Benzoyl peroxide was obtained by vulcanizing treatment 30 minutes at a temperature of 120 DEG C.
The magnetorheological clay of the shear hardening being prepared can fashion into cylinder type, collar plate shape and other shapes；Fast
Speed, which stretches magnetorheological clay, will cause fracture；In the magnetorheological clay of slow stretching, softness can be shown；In quick washing
Fine pits can be formed when magnetorheological clay；Deep hole, the shear hardening magnetic current of preparation can be formed when slowly compressing magnetorheological clay
Become the good magnetic response characteristic that clay is also shown.
Embodiment 2
It prepares silicon boron copolymer: weighing the boric acid of 30 g with electronic balance, be placed in a vacuum drying oven, held at a temperature of 180 DEG C
It is continuous to heat 1.5 hours to get pyroboric acid is arrived；Weighing viscosity with electronic balance is 300 mm280 g of dimethyl silicone polymer of/s,
4 g of 10 g of pyroboric acid and dehydrated alcohol first passes through electric mixer and stirs 15 minutes, is subsequently placed in vacuum oven, 210
Continuous heating 20 hours at a temperature of DEG C；It cools down and obtains silicon boron copolymer.Benzoyl peroxide passes through at a temperature of 130 DEG C
It obtains within vulcanizing treatment 20 minutes.
It prepares the magnetorheological clay of shear hardening: weighing 25 g of carbonyl iron dust, vulcanization that mass fraction is 50% with electronic balance
0.1 g of agent benzoyl peroxide, 3 g of plasticizer glycerine are distributed in 20 g silicon boron polymer matrices；By silicon boron copolymer, carbonyl
Base iron powder, vulcanizing agent benzoyl peroxide, plasticizer glycerine are uniformly mixed；It is placed in a vacuum drying oven, in 110 DEG C of temperature
Lower continuous heating 20 minutes；It is taken out after cooling and obtains the magnetorheological clay of shear hardening.
Embodiment 3
Silicon boron copolymer matrix is prepared first, the boric acid of 40 g is weighed with electronic balance, is placed in a vacuum drying oven, in 160 DEG C of temperature
Lower continuous heating is spent 1.8 hours to get pyroboric acid is arrived；Weighing viscosity with electronic balance is 400 mm2The polydimethylsiloxanes of/s
6 g of 80 g of alkane, 20 g of pyroboric acid and dehydrated alcohol first passes through electric mixer and stirs 10 minutes, is subsequently placed at vacuum oven
In, the continuous heating 15 hours at a temperature of 230 DEG C；It cools down and obtains silicon boron copolymer.
Next prepares the magnetorheological clay of shear hardening, with electronic balance weigh mass fraction be 70% 35 g of carbonyl iron dust,
0.3 g of vulcanizing agent benzoyl peroxide, 1 g of plasticizer glycerine are distributed in 20 g silicon boron polymer matrices；Silicon boron is copolymerized
Object, carbonyl iron dust, vulcanizing agent benzoyl peroxide, plasticizer glycerine are uniformly mixed；It is placed in a vacuum drying oven, at 120 DEG C
At a temperature of continuous heating 40 minutes；It is taken out after cooling and obtains the magnetorheological clay of shear hardening.Wherein benzoyl peroxide passes through
It obtains within vulcanizing treatment 40 minutes at a temperature of 110 DEG C.
Embodiment 4
It prepares silicon boron copolymer: weighing the boric acid of 25 g with electronic balance, be placed in a vacuum drying oven, held at a temperature of 175 DEG C
It is continuous to heat 1.6 hours to get pyroboric acid is arrived；Weighing viscosity with electronic balance is 380 mm280 g of dimethyl silicone polymer of/s,
5 g of 17 g of pyroboric acid and dehydrated alcohol first passes through electric mixer and stirs 15 minutes, is subsequently placed in vacuum oven, 215
Continuous heating 16 hours at a temperature of DEG C；It cools down and obtains silicon boron copolymer.
It prepares the magnetorheological clay of shear hardening: weighing 32 g of carbonyl iron dust, vulcanization that mass fraction is 65% with electronic balance
0.2 g of agent benzoyl peroxide, 2 g of plasticizer glycerine are distributed in 20 g silicon boron polymer matrices；By silicon boron copolymer, carbonyl
Base iron powder, vulcanizing agent benzoyl peroxide, plasticizer glycerine are uniformly mixed；It is placed in a vacuum drying oven, in 115 DEG C of temperature
Lower continuous heating 35 minutes；It is taken out after cooling and obtains the magnetorheological clay of shear hardening.Wherein, benzoyl peroxide by
It obtains within vulcanizing treatment 35 minutes at a temperature of 125 DEG C.
Silicon boron copolymer, carbonyl iron dust, vulcanizing agent benzoyl peroxide, plasticizer glycerine in above-described embodiment is logical
Cross roll glue stick be uniformly mixed, dimethyl silicone polymer, boric acid, dehydrated alcohol, benzoyl peroxide purity be analysis it is pure.
Take 20 mm of basal diameter, height 1 mm cylindrical samples be placed in Austrian Anton Paar rheometer (model:
MCR51 in), test parameter is set as strain 10%, and angular frequency variation range is 0.1 ~ 100 rad/s, is measured as shown in Figure 1
For the storage modulus of the magnetorheological clay of shear hardening with the change curve of angular frequency, angular frequency changes to 100 from 0.1 rad/s
When rad/s, the storage modulus of the magnetorheological clay of shear hardening prepared by the present invention increases to 1.77 MPa, energy storage mould by 348 Pa
Amount rises rapidly with the increase of frequency of stimulation, shows typical shear hardening performance.
Take 20 mm of basal diameter, height 1 mm cylindrical samples be placed in Austrian Anton Paar rheometer (model:
MCR51 in), test parameter is set as strain 0.5%, and 10 rad/s of angular frequency, magnetic induction intensity variation range is 0 ~ 1 T, is measured
The storage modulus of the magnetorheological clay of shear hardening as shown in Figure 2 with magnetic induction intensity change curve, magnetic induction intensity from 0 become
When changing to 1 T, the storage modulus of the magnetorheological clay of shear hardening prepared by the present invention increases to 1.68 MPa by 0.23 MPa, storage
Energy modulus rises rapidly with the increase of magnetic induction intensity, shows apparent magnetic rheology effect.
The problems such as sedimentation for magnetorheological fluid is unstable and magnetic rheology elastic body magnetic rheology effect is not high, the present invention mentions
The magnetorheological clay of the shear hardening of confession is a kind of multifunctional composite for having both rate sensitivity characteristic and magnetic rheology effect, this
Novel intelligent material can not only passive response external environmental excitation, realize adaptive, self-reinforcing function, moreover it is possible in magnetic fields
Lower realization orientation is controllable, has broad application prospects in the antidetonation vibration damping field of large scale civil engineering structure.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of the magnetorheological clay of shear hardening, which is characterized in that the described method comprises the following steps:
By carbonyl iron dust, benzoyl peroxide and glycerol dispersion into silicon boron copolymer, it is dried to obtain magnetorheological clay.
2. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 1, which is characterized in that the silicon boron
Copolymer, carbonyl iron dust, benzoyl peroxide, glycerine mass ratio be 20:25-35:0.1-0.3:1-3.
3. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 1, which is characterized in that the magnetic current
Become the drying temperature of clay as 110-130oC；Drying time is 20-40 min.
4. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 1, which is characterized in that the carbonyl
The mass fraction of iron powder is 50-70%.
5. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 1, which is characterized in that the peroxide
Change benzoyl to pass through in 110-130oVulcanizing treatment 20-40 min is obtained at a temperature of C.
6. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 1, which is characterized in that the silicon boron
The preparation method of copolymer includes:
Boric acid is dried to obtain pyroboric acid；
By the pyroboric acid with dimethyl silicone polymer, dehydrated alcohol by mixing, being dried to obtain silicon boron copolymer.
7. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 6, which is characterized in that the boric acid
Drying temperature be 160-180oC；Drying time is 1.5 ~ 2 h.
8. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 6, which is characterized in that described poly- two
The mass ratio of methylsiloxane, pyroboric acid and dehydrated alcohol is 80:10-20:4-6.
9. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 6, which is characterized in that the silicon boron
The drying temperature of copolymer is 210-230oC；Drying time is 15 ~ 20 h.
10. a kind of preparation method of the magnetorheological clay of shear hardening according to claim 6, which is characterized in that described poly-
Dimethyl siloxane viscosity is 300-400 mm2/s。
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Cited By (2)
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| CN113025050A (en) * | 2021-04-02 | 2021-06-25 | 中国科学技术大学 | Composite material with shear hardening and flame retardant properties and preparation method thereof |
| CN115416124A (en) * | 2022-08-29 | 2022-12-02 | 华南师范大学 | Composite material and preparation method and application thereof |
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| CN113025050A (en) * | 2021-04-02 | 2021-06-25 | 中国科学技术大学 | Composite material with shear hardening and flame retardant properties and preparation method thereof |
| CN115416124A (en) * | 2022-08-29 | 2022-12-02 | 华南师范大学 | Composite material and preparation method and application thereof |
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Application publication date: 20190806 |