CN114409866A - Preparation method of polymer-based damping composite material with local directional arrangement structure - Google Patents
Preparation method of polymer-based damping composite material with local directional arrangement structure Download PDFInfo
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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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
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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
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- C08K9/04—Ingredients treated with organic substances
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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
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Abstract
The invention discloses a preparation method of a polymer-based damping composite material with a local directional arrangement structure, and relates to a preparation method of a damping composite material. The arrangement direction of inorganic ions can be changed under an electric field, local transverse, longitudinal or arc-shaped directional arrangement along the length direction is formed in the polymer, aggregation or local defect phenomena caused by the traditional electric field modification mode are overcome by preprocessing inorganic particles, adding a polarity modifier, optimizing polarization voltage and controlling viscosity of prepolymer, the dispersion condition and directional arrangement response efficiency of the inorganic particles in the polymer are improved, the damping performance and the electrical performance of the prepared composite material in the local directional arrangement direction are obviously improved, the process is simple and high in efficiency, the composite material is suitable for mass production, and the composite material has wide prospects in the fields of precision manufacturing, aerospace, road and bridge construction, environmental protection, noise reduction and the like.
Description
Technical Field
The invention relates to a preparation method of a damping composite material, in particular to a preparation method of a polymer-based damping composite material with a local directional arrangement structure.
Background
The damping material is a functional material which can weaken mechanical vibration and reduce vibration noise, and the high polymer material has excellent vibration and noise reduction effects due to the viscoelasticity of the high polymer material, so that the damping material is widely applied to the industry. However, in practical application, most of the materials are made of single traditional rubber materials, so that the defects of insufficient damping performance, poor mechanical property, insufficient aging resistance and the like generally exist, and most of the damping materials bear single-aspect vibration in use under many conditions, while the commonly adopted polymer damping materials are all isotropic materials, so that the damping performance in a single direction is slightly insufficient, but the damping performance in other directions generally cannot play a role. In order to improve the performance of polymer materials, the materials are modified by blending or copolymerization among the polymer materials. Modification of polymers using inorganic particles as functional particles is one of the techniques commonly used in the polymer material industry. These functional particles may be classified into metal oxide materials, metal salt materials, carbon-based materials, and the like, in terms of their basic composition, wherein the carbon-based fillers include carbon fibers, carbon nanotubes, graphene, carbon black, and the like. Because the inorganic particles have high modulus, high strength, good mechanical property and good heat conduction and electric conductivity, if the polymer material is used as a matrix to be matched with the inorganic functional particles to prepare the composite material, the composite material can show good strength, elasticity and fatigue resistance, and the performance of the composite material is greatly improved. However, the excellent characteristics of the inorganic particles are greatly inhibited by the problems of self-irregular distribution, mutual winding, large amount of agglomeration and the like, so that the performance of the inorganic particles cannot be fully exerted, and the interface modification of the inorganic particles to achieve the ultra-dispersion effect and the directional arrangement of the inorganic particles in a certain direction are effective means for solving the problem at present. Patent CN110129606A discloses a method for preparing an aluminum-based composite wire reinforced by carbon nanotubes in an oriented arrangement, which comprises mixing carbon nanotubes and pure aluminum powder uniformly, then performing repeated continuous extrusion, drawing, annealing and the like to make the carbon nanotubes oriented in the aluminum-based composite material, so that the prepared aluminum-based composite material obtains high strength in a specific direction; patent CN109321775A discloses a method for preparing copper-based composite material with carbon nano-tubes in directional arrangement, which comprises placing copper wires in carbon nano-tube solution uniformly dispersed in water, and subjecting to ultrasonic oscillation, drying and hot-pressing sintering to obtain the desired product, wherein the method is relatively simple in process, but the process for realizing directional arrangement of carbon nano-tubes on copper wires in a relatively convenient manner, which is currently used for directional arrangement of inorganic particles, has certain defects, such as that carbon fibers/epoxy resin still belong to the directional distribution of fibers in a macroscopic system, and cannot realize the directional arrangement in a microscopic system, the anisotropic preparation process for the polymer-based damping material is not reported at present, and the existing polymer-based damping material has the defects of complex process, difficult operation and insufficient damping performance, is difficult to meet the higher and higher requirements of the damping material in the current industry, and becomes a restriction for precise manufacturing in China, The main technical problems in the fields of aerospace, automobile manufacturing, road and bridge construction and the like.
Disclosure of Invention
The invention aims to provide a preparation method of a polymer-based damping composite material with a local directional arrangement structure, which improves the dispersion state of inorganic particles in a polymer matrix, enables the inorganic particles to be directionally arranged in a specific direction, is suitable for mass production, and the prepared polymer-based damping composite material has anisotropy, low required cost and simple process, and the electrical property and the damping property of the polymer-based damping composite material are obviously improved.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a polymer-based damping composite material with a locally oriented arrangement structure comprises the steps of enabling inorganic particles to form a locally oriented arrangement structure in a polyurethane polymer matrix through polarization and ultra-dispersion, and thus obtaining an anisotropic polymer-based damping composite material with excellent damping performance and electric performance;
the preparation method comprises the following preparation steps:
(1) pretreatment of inorganic particles: sequentially adding an interface modifier and inorganic particles into a dispersing agent, performing ultrasonic oscillation for 10-30min, performing suction filtration on a product, and drying at 50-90 ℃ until the weight of the product is constant to prepare treated inorganic particle powder for later use;
(2) preparation of a polymer prepolymer: vacuum dehydrating isocyanate polyol at 80-100 ℃ for 3-4h, adding dehydrated polyol, and reacting at 60-80 ℃ under the protection of nitrogen for 2-3h to obtain a polyurethane prepolymer;
(3) preparation of polymer-based damping composite material: adding a polar modifier into the prepared prepolymer at 50-60 ℃, reacting for 10-30min, then respectively adding pretreated inorganic particles and a curing agent into a mixed solvent, reacting for 1-10min under the assistance of an ultrahigh frequency oscillator, dispersing uniformly, and then pouring into a mold;
(4) polarization treatment of the product: under the condition of 30-70 ℃, applying alternating current or direct current to the sample in the mould along the length, width or thickness direction of the sample by using metal electrode plates with uniformly distributed porous structures on the positive and negative poles, wherein the applied electric field strength is 20-500V/mm, the frequency is 0-100 Hz, and the polarization time is 10-600 s, then heating to 70-90 ℃, continuing to cure for 3-24h, and demoulding after curing is finished to obtain the polymer-based damping composite material with the local directional arrangement structure.
The preparation method of the polymer-based damping composite material with the local orientation arrangement structure comprises the following steps of: one or a mixture of more of carbon nano tube, graphene, carbon black, iron powder and oxide thereof.
The preparation method of the polymer-based damping composite material with the local orientation arrangement structure comprises the following steps: the inorganic particles are arranged in the polymer along the length direction in a transverse direction, a longitudinal direction or a circular arc shape or a combination of the two.
The preparation method of the polymer-based damping composite material with the local oriented arrangement structure comprises the following steps of (1) preparing a dispersing agent, wherein the dispersing agent comprises one or a mixture of acetone, benzene, chloroform and ethanol dichloride; the interface modifier comprises one or a mixture of more of bis-3-methylpropyloxy propyl tetramethyldisiloxane, 2- (perfluorooctyl) ethyl methacrylate and a chromium complex, and the dosage of the interface modifier is 0.5-5% of that of the inorganic particles.
In the preparation method of the polymer-based damping composite material with the local directional arrangement structure, the polyalcohol used for preparing the polymer matrix in the step (2) comprises one or a mixture of a plurality of polyoxypropylene glycol, polyethylene glycol adipate, polycaprolactone and polytetrahydrofuran ether glycol and derivatives thereof; the isocyanate comprises one or more of hexamethylene diisocyanate, xylene methane diisocyanate and toluene diisocyanate and derivatives thereof.
In the preparation method of the polymer-based damping composite material with the local oriented arrangement structure, the polar modifier in the step (3) comprises one or a mixture of more of hexacetyl trimethyl ammonium chloride, acrylonitrile-butadiene-styrene and polyurethane azide and derivatives thereof.
The invention has the advantages and effects that:
the present invention adopts super dispersing method and polarizing method to control the oriented arrangement of inorganic particle in polyurethane polymer matrix locally. The method can change the arrangement direction of inorganic ions under an electric field, form local transverse, longitudinal or arc-shaped directional arrangement along the length direction in the polymer, overcome the phenomenon of agglomeration or local defect caused by the traditional electric field modification mode by pretreating inorganic particles, adding a polarity modifier, optimizing polarization voltage and controlling the viscosity of a prepolymer, improve the dispersion condition and directional arrangement response efficiency of the inorganic particles in the polymer, obviously improve the damping performance and electrical performance of the prepared composite material in the local directional arrangement direction, and has the advantages of simple operation, simple process, high efficiency, energy conservation, suitability for mass production and wide prospect in the fields of precision manufacturing, aerospace, road and bridge construction, environmental protection, noise reduction and the like.
Drawings
FIG. 1 is a scanning electron micrograph of example 2 and example 3 of the present invention;
FIG. 2 is a flow chart of the present invention.
Detailed Description
Example 1
(1) Pretreatment of the carbon nanotubes: adding bis-3-methacryloxypropyltetramethyldisiloxane accounting for 1.0 percent of the mass of the inorganic particles to be modified and 0.5 percent of 2- (perfluorooctyl) ethyl methacrylate into 500ml of acetone solution, fully stirring, adding the carbon nano tube into the acetone solution, performing ultrasonic oscillation for 20min, performing suction filtration on the product, and then performing drying treatment at 80 ℃ until the weight of the product is constant, thus preparing the treated carbon nano tube powder for later use;
(2) preparation of a prepolymer: vacuum dehydrating Toluene Diisocyanate (TDI) at 90 ℃ for 3.5h, cooling to 60 ℃, removing vacuum, adding 10.262g of TDI into 39.280g of dehydrated polytetrahydrofuran ether glycol (PTMG), heating to 80 ℃, and reacting for 2.5h under the protection of nitrogen to obtain a polyurethane prepolymer;
(3) preparation of inorganic particle modified polymer matrix composite: adding acrylonitrile-butadiene-styrene (ABS) accounting for 5.0% of the prepolymer mass into the prepared prepolymer at 60 ℃ for reaction for 20min, then respectively adding 5.0% of pretreated carbon nanotubes and 5.248g of Moca (MOCA) into the mixed solvent, reacting for 5min with the aid of an ultrahigh frequency oscillator, and pouring the mixture into a mold after the mixture is uniformly dispersed;
(4) polarization treatment of the product: and (2) under the condition of 60 ℃, utilizing the electrode plate with holes to supply alternating current to the sample in the mould along the thickness direction, wherein the voltage is 200V/mm, the frequency is 50Hz, and the power supply time is 60s, so that the carbon nano tubes are locally and directionally arranged in the polymer matrix, then removing the power supply, heating the polarized sample to 80 ℃, and continuing to cure for 5.0 h. And demolding after curing to obtain the carbon nano tube/polyurethane-based damping composite material with a local directional arrangement structure along the thickness direction.
Example 2
(1) Pretreatment of the carbon nanotubes: adding bis-3-methacryloxypropyltetramethyldisiloxane accounting for 1.0 percent of the mass of inorganic particles to be modified and 1.0 percent of 2- (perfluorooctyl) ethyl methacrylate into 500ml of acetone solution, fully stirring, adding the carbon nano tube into the acetone solution, performing ultrasonic oscillation for 30min, performing suction filtration on the product, and then performing drying treatment at 90 ℃ until the product is constant in weight to prepare treated carbon nano tube powder for later use;
(2) preparation of a prepolymer: vacuum dehydrating Toluene Diisocyanate (TDI) at 95 ℃ for 3.2h, cooling to 60 ℃, relieving the vacuum, adding 12.000g of dehydrated TDI into 46.000g of dehydrated polytetrahydrofuran ether glycol (PTMG), heating to 80 ℃, and reacting under the protection of nitrogen for 2.0h to obtain a polyurethane prepolymer;
(3) preparation of inorganic particle modified polymer matrix composite: adding acrylonitrile-butadiene-styrene accounting for 8.0 percent of the prepared prepolymer into the prepolymer at 50 ℃ for reaction for 30min, then respectively adding 5.0 percent of pretreated carbon nano tube and 6.350g of MOCA into the mixed solvent, reacting for 8min with the assistance of an ultrahigh frequency oscillator, dispersing uniformly and pouring into a die;
(4) polarization treatment of the product: and (2) under the condition of 60 ℃, utilizing the electrode plate with holes to electrify the sample in the mould along the length direction with alternating current, wherein the voltage is 200V/mm, the frequency is 50Hz, and the electrifying time is 60s respectively, so that the carbon nano tubes are locally and directionally arranged in the polymer matrix, then removing the power supply, heating the polarized sample to 90 ℃, and continuing to cure for 3.0 h. And demolding after curing to obtain the carbon nano tube/polyurethane-based damping composite material with a local directional arrangement structure along the length direction.
Example 3
(1) Pretreatment of the carbon nanotubes: adding bis-3-methylpropenyloxypropylated tetramethyldisiloxane which accounts for 2.0 percent of the mass of the inorganic particles to be modified into 500ml of acetone solution, fully stirring, adding the carbon nano tube into the acetone solution, performing ultrasonic oscillation for 25min, performing suction filtration on the product, and then performing drying treatment at 70 ℃ until the product is constant in weight to prepare treated carbon nano tube powder for later use;
(2) preparation of a prepolymer: vacuum dehydrating Toluene Diisocyanate (TDI) at 90 ℃ for 4.0h, cooling to 60 ℃, removing vacuum, adding 4.238g of dehydrated TDI into 16.221g of polytetrahydrofuran ether glycol (PTMG), heating to 80 ℃, and reacting under the protection of nitrogen for 3.0h to obtain a polyurethane prepolymer;
(3) preparation of inorganic particle modified polymer matrix composite: adding acrylonitrile-butadiene-styrene (ABS) accounting for 6.0% of the prepolymer into the prepared prepolymer at 55 ℃ for reaction for 15min, then respectively adding 5.0% of pretreated carbon nano tube and 2.239g of MOCA into the mixed solvent, reacting for 10min with the aid of an ultrahigh frequency oscillator, dispersing uniformly, and pouring into a mold;
(4) polarization treatment of the product: and (2) under the condition of 55 ℃, alternating current is conducted on the sample in the mould along the length direction by using the electrode plate with the hole, the voltage is 300V/mm, the frequency is 50Hz, the conduction time is 100s, the carbon nano tubes are locally and directionally arranged in the polymer matrix, then the power supply is removed, and the polarized sample is heated to 85 ℃ and then is continuously cured for 20.0 h. And demolding after curing to obtain the carbon nano tube/polyurethane-based damping composite material with a local directional arrangement structure along the length direction.
Example 4
(1) Pretreatment of the carbon nanotubes: adding bis-3-methacryloxypropyltetramethyldisiloxane accounting for 1.0 percent of the mass of the inorganic particles to be modified and 0.5 percent of 2- (perfluorooctyl) ethyl methacrylate into 500ml of acetone solution, fully stirring, adding the carbon nano tube into the acetone solution, performing ultrasonic oscillation for 18min, performing suction filtration on the product, and then performing drying treatment at 70 ℃ until the product is constant in weight to prepare treated carbon nano tube powder for later use;
(2) preparation of a prepolymer: vacuum dehydrating Toluene Diisocyanate (TDI) at 95 ℃ for 2.0h, cooling to 60 ℃, removing vacuum, adding 3.112g of dehydrated TDI into 12.566g of dehydrated polytetrahydrofuran ether glycol (PTMG), heating to 80 ℃, and reacting for 3.0h under the protection of nitrogen to obtain a polyurethane prepolymer;
(3) preparation of inorganic particle modified polymer matrix composite: adding polyurethane azide accounting for 5.0 percent of the prepared prepolymer into the prepolymer at the temperature of 60 ℃ for reaction for 25 min; then respectively adding 5.0% of pretreated carbon nano tube and 1.579g of curing agent MOCA into the mixed solvent, reacting for 5min with the aid of an ultrahigh frequency oscillator, and pouring the mixture into a mold after the mixture is uniformly dispersed;
(4) polarization treatment of the product: and under the condition of 55 ℃, utilizing a porous electrode plate to supply direct current to a sample in the mold along the length direction, wherein the voltage is 350V/mm, the electrifying time is 60s, the carbon nano tubes are locally and directionally arranged in the polymer matrix, then removing the power supply, curing the polarized sample for 10.0h at 70 ℃, and demolding after curing to obtain the carbon nano tube/polyurethane-based damping composite material with the locally and directionally arranged structure along the length direction.
Example 5
(1) Pretreatment of graphene: adding bis-3-methacryloxypropyltetramethyldisiloxane which accounts for 2.5 percent of the mass of the inorganic particles to be modified into 500ml of acetone solution, fully stirring, adding graphene into the acetone solution, performing ultrasonic oscillation for 30min, performing suction filtration on reactants, and then drying at 55 ℃ until the weight of the product is constant to prepare the treated graphene for later use;
(2) preparation of a prepolymer: dehydrating xylene Methane Diisocyanate (MDI) at 85 ℃ for 3.2h in vacuum, cooling to 60 ℃, relieving the vacuum, adding 2.879g of dehydrated MDI into 10.366g of dehydrated polyethylene glycol adipate (PEA), heating to 80 ℃, and reacting for 2.5h under the protection of nitrogen to obtain a polyurethane prepolymer;
(3) preparation of inorganic particle modified polymer matrix composite: adding hexacetyl trimethyl ammonium chloride accounting for 8.0 percent of the prepared prepolymer into the prepared prepolymer at the temperature of 55 ℃ for reaction for 22min, then respectively adding 7.0 percent of pretreated graphene and 1.210g of MOCA into the mixed solvent, reacting for 10min with the assistance of an ultrahigh frequency oscillator, and pouring the mixture into a mold after the mixture is uniformly dispersed;
(4) polarization treatment of the product: and under the condition of 65 ℃, electrifying the sample in the mold by using the electrode plate with the hole along the length direction with direct current, wherein the voltage is 300V/mm, the electrifying time is 180s respectively, so that the graphene is locally and directionally arranged in the polymer matrix, removing the power supply, heating the polarized sample to 75 ℃, and continuously curing for 12.0 h. And demolding after curing is finished to obtain the graphene/polyurethane-based damping composite material with a local directional arrangement structure along the length direction.
Table 1 below is a table of the conductivity properties of examples 1-5 of the present invention; table 2 shows damping performance tables of examples 1 to 5 of the present invention.
TABLE 1
Note: the measurements were taken along the length of the sample.
TABLE 2
Note: the force direction is along the length direction of the sample when measuring.
Claims (6)
1. A preparation method of a polymer-based damping composite material with a locally oriented arrangement structure is characterized in that inorganic particles form a locally oriented arrangement structure in a polyurethane polymer matrix through polarization and ultra-dispersion, so that an anisotropic polymer-based damping composite material with excellent damping performance and electric performance is obtained;
the preparation method comprises the following preparation steps:
(1) pretreatment of inorganic particles: sequentially adding an interface modifier and inorganic particles into a dispersing agent, performing ultrasonic oscillation for 10-30min, performing suction filtration on a product, and drying at 50-90 ℃ until the weight of the product is constant to prepare treated inorganic particle powder for later use;
(2) preparation of a polymer prepolymer: vacuum dehydrating isocyanate polyol at 80-100 ℃ for 3-4h, adding dehydrated polyol, and reacting at 60-80 ℃ under the protection of nitrogen for 2-3h to obtain a polyurethane prepolymer;
(3) preparation of polymer-based damping composite material: adding a polar modifier into the prepared prepolymer at 50-60 ℃, reacting for 10-30min, then respectively adding pretreated inorganic particles and a curing agent into a mixed solvent, reacting for 1-10min under the assistance of an ultrahigh frequency oscillator, dispersing uniformly, and then pouring into a mold;
(4) polarization treatment of the product: under the condition of 30-70 ℃, applying alternating current or direct current to the sample in the mould along the length, width or thickness direction of the sample by using metal electrode plates with uniformly distributed porous structures on the positive and negative poles, wherein the applied electric field strength is 20-500V/mm, the frequency is 0-100 Hz, and the polarization time is 10-600 s, then heating to 70-90 ℃, continuing to cure for 3-24h, and demoulding after curing is finished to obtain the polymer-based damping composite material with the local directional arrangement structure.
2. The method for preparing a locally aligned polymer-based damping composite according to claim 1, wherein the inorganic particles comprise: one or a mixture of more of carbon nano tube, graphene, carbon black, iron powder and oxide thereof.
3. The method for preparing a locally oriented structured polymer-based damping composite according to claim 1, wherein the locally oriented structure is in the form of: the inorganic particles are arranged in the polymer along the length direction in a transverse direction, a longitudinal direction or a circular arc shape or a combination of the two.
4. The method for preparing the locally aligned structural polymer-based damping composite material as claimed in claim 1, wherein the dispersant in the step (1) comprises one or more of acetone, benzene, chloroform, and ethanol dichloride; the interface modifier comprises one or a mixture of more of bis-3-methylpropyloxy propyl tetramethyldisiloxane, 2- (perfluorooctyl) ethyl methacrylate and a chromium complex, and the dosage of the interface modifier is 0.5-5% of that of the inorganic particles.
5. The method for preparing a locally aligned polymer-based damping composite material according to claim 1, wherein the polyol used for preparing the polymer matrix in the step (2) comprises one or more of polyoxypropylene glycol, polyethylene glycol adipate, polycaprolactone, polytetrahydrofuran ether glycol and derivatives thereof; the isocyanate comprises one or more of hexamethylene diisocyanate, xylene methane diisocyanate and toluene diisocyanate and derivatives thereof.
6. The method for preparing the locally aligned structural polymer-based damping composite material as claimed in claim 1, wherein the polar modifier in the step (3) comprises one or more of hexacetyl trimethyl ammonium chloride, acrylonitrile-butadiene-styrene, polyurethane azide and derivatives thereof.
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| CN117186619A (en) * | 2023-09-08 | 2023-12-08 | 上海淳信机电科技股份有限公司 | Polyurethane damping composite material and preparation method thereof |
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