CN104479341A - Preparation method of anisotropic variable-modulus polyurethane-base composite damping material - Google Patents
Preparation method of anisotropic variable-modulus polyurethane-base composite damping material Download PDFInfo
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- CN104479341A CN104479341A CN201410746629.0A CN201410746629A CN104479341A CN 104479341 A CN104479341 A CN 104479341A CN 201410746629 A CN201410746629 A CN 201410746629A CN 104479341 A CN104479341 A CN 104479341A
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- damping material
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Abstract
The invention provides an anisotropic variable-modulus polyurethane-base composite damping material and a preparation method thereof. The composite damping material is prepared by curing a polyurethane base, magnetic particles and a crosslinking agent in a 40-60mT magnetic field, so that the magnetic particles generate directional arrangement in the curing process. The magnetic particles account for 20-100 wt% of the polyurethane base; and the mole ratio of the -NCO to the crosslinking agent -OH is 1:1.2. The damping material in a compressive state has the advantages of high dissipation factor, high storage modulus and great variation of modulus along with magnetic field intensity. Under the influence of 0-400mT, the storage modulus of the material under the frequency of 1Hz is increased from 2.2*10<6>Pa to 3.26*10<6>Pa. The composite damping material has the advantages of simple preparation technique and favorable damping capacity; the viscoelastic property can generate great variation under the action of the magnetic field; and the composite damping material can be used for designing various devices with controllable rigidity or damping, such as suspension systems, bushings, vibration absorbers and the like.
Description
Technical field
What the present invention relates to is a kind of damping material, the present invention also relates to a kind of preparation method of damping material.Relate in particular to a kind of anisotropy modulus changeable type polyurethane-base composite damping material and preparation method thereof.
Background technology
Mechanical vibration are extensively present in power system.In productive life, vibration & noise is the inevitable phenomenon occurred.The excessive hull structure that causes of such as ship ship vibration when navigating by water produces fatigure failure, by the normal work of instrument and equipment affect on ship, and reduction service precision, reduction of service life.Dampening apparatus conventional is at present mainly elastic damping element, and as spring, rubber pad etc., by spring or rubber, the waste of energy in moving process suppresses structural vibration to these damping elements.This type of dampening apparatus have structure simple, be easy to advantages such as realizing, economical, reliable, but set in a certain specific environment optimization due to its structural parameter, and this parameter just cannot change once setting, the handiness in shortage control.Therefore rigidity, the damping material that modulus is adjustable, can effectively address this problem.
Magnetic flow liquid has higher magnetic rheology effect, but magnetic flow liquid exists free settling problem, and long-time use can produce magnetic particle wearing and tearing.At present about also not can be good at the damping material regulating modulus in the report of magnetic rheology elastic body, publication number is the preparation method disclosing a kind of thermoplastic magnetorheological elastomer in the patent documentation of CN101740192A, its elastomeric modulus prepared is increased to 80 ~ 250%, but it selects thermoplastic matrix SIS/SEBS to be matrix, its material anisotropy modulus immutable, lack the handiness of practical application.
Summary of the invention
One of main purpose of the present invention be to provide a kind of have orientation, the anisotropy modulus changeable type polyurethane-base composite damping material of high damping properties; Two of main purpose of the present invention is to provide the preparation method of a kind of processing method simple anisotropy modulus changeable type polyurethane-base composite damping material.
The technical scheme that anisotropy modulus changeable type polyurethane-base composite damping material of the present invention is taked: solidified under magnetic field by polyurethane matrix, magnetic particle and linking agent and form.
Anisotropy modulus changeable type polyurethane-base composite damping material of the present invention can also comprise:
1, the content of magnetic particle is 20 ~ 100% of polyurethane-base weight.
2 ,-the NCO in base polyurethane prepolymer for use as is 1:0.95-1.2 with the mol ratio of-OH in linking agent.
3, described magnetic particle is carbonyl iron dust or carbonyl nickel powder, or is the mixture of carbonyl iron dust and carbonyl nickel powder.
The technical scheme that the preparation method of anisotropy modulus changeable type polyurethane-base composite damping material of the present invention takes:
1) by dibasic alcohol heating under vacuum, then add tolylene diisocyanate (TDI), stir, be slowly warmed up to temperature of reaction 75 ~ 85 DEG C, reaction 2.5 ~ 3h, is cooled to room temperature, obtains main chain base polyurethane prepolymer for use as;
2) base polyurethane prepolymer for use as, magnetic particle and linking agent are mixed, in 85 DEG C-90 DEG C, use mould to solidify in magnetic field and obtain anisotropy modulus changeable type polyurethane-base composite damping material.
The preparation method of anisotropy modulus changeable type polyurethane-base composite damping material of the present invention can also comprise:
1, described magnetic particle is carbonyl iron dust or the carbonyl nickel powder of using silane coupling agent modified, or is the mixture of carbonyl iron dust and carbonyl nickel powder, and the content of magnetic particle is 20 ~ 100% of polyurethane prepolymer weight.
2 ,-the NCO in base polyurethane prepolymer for use as is 1:0.95-1.2 with the mol ratio of-OH in linking agent, is preferably 1:1.2.
3, described dibasic alcohol is polyoxypropyleneglycol (PPG) or polytetramethylene ether diol (PTMG).
4, the magneticstrength in magnetic field is 40-60mT.
5, linking agent is one or more in TriMethylolPropane(TMP) (TMP), BDO, glycerol or Viscotrol C.
The present invention is first with dibasic alcohol heating under vacuum removing moisture and bubble, and rear and vulcabond fully reacts obtained graft type base polyurethane prepolymer for use as at 75 ~ 85 DEG C, made performed polymer-NCO% content 2%-7%.Then solidify under magnetic field with polyurethane matrix, magnetic particle and linking agent and make anisotropy modulus changeable type polyurethane-base composite damping material.
Advantage of the present invention is: the invention provides a kind of magnetic particle have in the material orientation, high damping properties, modulus is adjustable, take urethane as the composite damping material of matrix.By mould, under the magnetic field of 40-60mT, make the magnetic particle in material become catenation in the curing process, material can be made to have higher storage modulus in a compressed mode for this catenation and the change of modulus can reach 150%.The dissipation factor (tan δ) of this damping material is high, at room temperature reaches more than 0.3 in wider frequency range, and when compressing, have higher storage modulus, magnetic rheology effect is large.Preparation technology is simple, and cheap, damping capacity is better.Under the impact of 0-400mT, during 1Hz, material storage modulus is increased to 3.26 × 106Pa by 2.2 × 106Pa.Viscous-elastic behaviour under the action of a magnetic field can produce very large change, can be used for the design of various rigidity controllable or damping device, as suspension, axle bush, bump leveller etc.
Accompanying drawing explanation
Fig. 1 be obtained damping material storage modulus at room temperature in different field intensity to the curve of frequency;
Fig. 2 is that obtained damping material at room temperature loss is to the curve of frequency.
Embodiment
For a better understanding of the present invention, be described below by embodiment.
Embodiment 1:
1) synthesis of polyurethane performed polymer: add 259.92g polyoxypropyleneglycol (PPG) in the there-necked flask that vacuum unit is housed, 1.5 ~ 2h is vacuumized to remove the moisture in polyoxypropyleneglycol in 110 DEG C of maintenances, rear stopping vacuumizes and is cooled to 45 ~ 55 DEG C, then 80.57g tolylene diisocyanate (TDI) is added, slowly be warming up to 80 DEG C and react 3h, reach pale yellow transparent thick liquid, it is for subsequent use that room temperature places 12h.
2) preparation of anisotropy modulus changeable type polyurethane-base composite damping material: a time precise 30g base polyurethane prepolymer for use as, 30g magnetic particle fully mix, and remove bubble and moisture at 85 DEG C in vacuum drying oven.Then add the BDO of 1.93g preheating, stir, in 40-60mT magnetic field, at 85 DEG C, after deviating from bubble, solidify to obtain anisotropy modulus changeable type polyurethane-base composite damping material.
Embodiment 2
1) synthesis of polyurethane performed polymer: add 259.92g polyoxypropyleneglycol (PPG) in the there-necked flask that vacuum unit is housed, 1.5 ~ 2h is vacuumized to remove the moisture in polyoxypropyleneglycol in 110 DEG C of maintenances, rear stopping vacuumizes and is cooled to 45 ~ 55 DEG C, then 80.57g tolylene diisocyanate (TDI) is added, slowly be warming up to 80 DEG C and react 3h, reach pale yellow transparent thick liquid, it is for subsequent use that room temperature places 12h.
2) preparation of anisotropy modulus changeable type polyurethane-base composite damping material: precise 30g base polyurethane prepolymer for use as, a 15g magnetic particle, fully mix, remove bubble and moisture in vacuum drying oven at 85 DEG C.Then add the TriMethylolPropane(TMP) that 1.92g has melted, stir, in 40-60mT magnetic field, at 85 DEG C, after deviating from bubble, solidify to obtain anisotropy modulus changeable type polyurethane-base composite damping material.
Embodiment 3
1) synthesis of polyurethane performed polymer: add 339.8g polytetramethylene ether diol (PTMG) in the there-necked flask that vacuum unit is housed, 1.5 ~ 2h is vacuumized to remove the moisture in polytetramethylene ether diol in 110 DEG C of maintenances, rear stopping vacuumizes and is cooled to 45 ~ 55 DEG C, then 80.57g tolylene diisocyanate (TDI) is added, slowly be warming up to 80 DEG C and react 3h, reach pale yellow transparent thick liquid, it is for subsequent use that room temperature places 12h.
2) preparation of anisotropy modulus changeable type polyurethane-base composite damping material: precise 30g base polyurethane prepolymer for use as, a 6g magnetic particle, fully mix, remove bubble and moisture in vacuum drying oven at 85 DEG C.Then add the BDO of 1.15g preheating, stir, in 40-60mT magnetic field, at 85 DEG C, after deviating from bubble, solidify to obtain anisotropy modulus changeable type polyurethane-base composite damping material.
Embodiment 4
1) synthesis of polyurethane performed polymer: add 215.7g polytetramethylene ether diol (PTMG) in the there-necked flask that vacuum unit is housed, 1.5 ~ 2h is vacuumized to remove the moisture in polytetramethylene ether diol in 110 DEG C of maintenances, rear stopping vacuumizes and is cooled to 45 ~ 55 DEG C, then 80.57g tolylene diisocyanate (TDI) is added, slowly be warming up to 80 DEG C and react 3h, reach pale yellow transparent thick liquid, it is for subsequent use that room temperature places 12h.
2) preparation of anisotropy modulus changeable type polyurethane-base composite damping material: precise 30g base polyurethane prepolymer for use as, a 22.5g magnetic particle, fully mix, remove bubble and moisture in vacuum drying oven at 85 DEG C.Then add the TriMethylolPropane(TMP) that 2.68g has melted, stir, in 40-60mT magnetic field, at 85 DEG C, after deviating from bubble, solidify to obtain anisotropy modulus changeable type polyurethane-base composite damping material.
Claims (9)
1. an anisotropy modulus changeable type polyurethane-base composite damping material, is characterized in that: solidified under magnetic field by polyurethane matrix, magnetic particle and linking agent and form.
2. anisotropy modulus changeable type polyurethane-base composite damping material according to claim 1, is characterized in that: the content of magnetic particle is 20 ~ 100% of polyurethane-base weight;-NCO in base polyurethane prepolymer for use as is 1:0.95-1.2 with the mol ratio of-OH in linking agent.
3. anisotropy modulus changeable type polyurethane-base composite damping material according to claim 1 and 2, is characterized in that: described magnetic particle is carbonyl iron dust or carbonyl nickel powder, or is the mixture of carbonyl iron dust and carbonyl nickel powder.
4. a preparation method for anisotropy modulus changeable type polyurethane-base composite damping material, is characterized in that:
1) by dibasic alcohol heating under vacuum, then add tolylene diisocyanate, stir, be warmed up to temperature of reaction 75 ~ 85 DEG C, reaction 2.5 ~ 3h, is cooled to room temperature, obtains main chain base polyurethane prepolymer for use as;
2) base polyurethane prepolymer for use as, magnetic particle and linking agent are mixed, in 85 DEG C-90 DEG C, use mould to solidify in magnetic field and obtain anisotropy modulus changeable type polyurethane-base composite damping material.
5. the preparation method of anisotropy modulus changeable type polyurethane-base composite damping material according to claim 4, it is characterized in that: described magnetic particle is carbonyl iron dust or the carbonyl nickel powder of using silane coupling agent modified, or be the mixture of carbonyl iron dust and carbonyl nickel powder, the content of magnetic particle is 20 ~ 100% of polyurethane prepolymer weight.
6. the preparation method of anisotropy modulus changeable type polyurethane-base composite damping material according to claim 5, is characterized in that :-the NCO in base polyurethane prepolymer for use as is 1:0.95-1.2 with the mol ratio of-OH in linking agent.
7. the preparation method of the anisotropy modulus changeable type polyurethane-base composite damping material according to claim 4,5 or 6, is characterized in that: described dibasic alcohol is polyoxypropyleneglycol or polytetramethylene ether diol.
8. the preparation method of the anisotropy modulus changeable type polyurethane-base composite damping material according to claim 4,5 or 6, is characterized in that: the magneticstrength in magnetic field is 40-60mT.
9. the preparation method of anisotropy modulus changeable type polyurethane-base composite damping material according to claim 7, is characterized in that: the magneticstrength in magnetic field is 40-60mT.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804302A (en) * | 2019-11-15 | 2020-02-18 | 重庆大学 | Continuously controllable pointed cone array wave-absorbing material and preparation method thereof |
| CN114409866A (en) * | 2022-01-11 | 2022-04-29 | 沈阳化工大学 | Preparation method of polymer-based damping composite material with local directional arrangement structure |
| CN115746767A (en) * | 2022-12-10 | 2023-03-07 | 苏州铂韬新材料科技有限公司 | Glue with wave absorbing function and preparation method thereof |
| 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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| CN101513924A (en) * | 2009-04-03 | 2009-08-26 | 哈尔滨工程大学 | Magnetorheological elastomer intelligent vibration absorber used for ships |
| CN101573393A (en) * | 2006-12-20 | 2009-11-04 | 巴斯夫欧洲公司 | Anisotropic cellular elastomers |
| CN103304981A (en) * | 2012-03-12 | 2013-09-18 | 中国科学院化学研究所 | Cross-linked shape memory polyurethane responsive to magnetic field and/or electric field and preparation method thereof |
| CN103588944A (en) * | 2013-10-29 | 2014-02-19 | 中国科学院长春应用化学研究所 | Damping-adjustable polyurethane material and its preparation method and application thereof |
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2014
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Patent Citations (4)
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| CN101573393A (en) * | 2006-12-20 | 2009-11-04 | 巴斯夫欧洲公司 | Anisotropic cellular elastomers |
| CN101513924A (en) * | 2009-04-03 | 2009-08-26 | 哈尔滨工程大学 | Magnetorheological elastomer intelligent vibration absorber used for ships |
| CN103304981A (en) * | 2012-03-12 | 2013-09-18 | 中国科学院化学研究所 | Cross-linked shape memory polyurethane responsive to magnetic field and/or electric field and preparation method thereof |
| CN103588944A (en) * | 2013-10-29 | 2014-02-19 | 中国科学院长春应用化学研究所 | Damping-adjustable polyurethane material and its preparation method and application thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804302A (en) * | 2019-11-15 | 2020-02-18 | 重庆大学 | Continuously controllable pointed cone array wave-absorbing material and preparation method thereof |
| CN114409866A (en) * | 2022-01-11 | 2022-04-29 | 沈阳化工大学 | Preparation method of polymer-based damping composite material with local directional arrangement structure |
| CN114409866B (en) * | 2022-01-11 | 2023-11-28 | 沈阳化工大学 | Preparation method of polymer-based damping composite material with local directional arrangement structure |
| CN115746767A (en) * | 2022-12-10 | 2023-03-07 | 苏州铂韬新材料科技有限公司 | Glue with wave absorbing function and preparation method thereof |
| CN115746767B (en) * | 2022-12-10 | 2023-12-08 | 苏州铂韬新材料科技有限公司 | Glue with wave absorbing function and preparation method thereof |
| 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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Application publication date: 20150401 |