WO2006024457A1 - Magnetorheologische elastomere und deren verwendung - Google Patents
Magnetorheologische elastomere und deren verwendung Download PDFInfo
- Publication number
- WO2006024457A1 WO2006024457A1 PCT/EP2005/009195 EP2005009195W WO2006024457A1 WO 2006024457 A1 WO2006024457 A1 WO 2006024457A1 EP 2005009195 W EP2005009195 W EP 2005009195W WO 2006024457 A1 WO2006024457 A1 WO 2006024457A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetorheological
- magnetizable
- magnetorheological elastomers
- elastomers according
- particles
- Prior art date
Links
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
- F16F1/361—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material comprising magneto-rheological elastomers [MR]
-
- 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
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
- H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
- H01F1/375—Flexible bodies
-
- 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
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/28—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder dispersed or suspended in a bonding agent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the invention relates to magnetorheological elastomers of at least one non-magnetizable elastomeric carrier medium and magnetizable particles contained therein and their use.
- the mechanical properties such as the shear modulus can be reversibly changed by an applied magnetic field.
- Magnetically controllable elastomer composites comprising an elastomer matrix and magnetically polarizable particles, so-called magnetorheological elastomers (MRE), are already known.
- MRE magnetorheological elastomers
- EP 41 88 07 Bl describes the preparation of a highly saturated nitrile rubber without a binder and reaction accelerator in which strontium and / or barium ferrites are incorporated. After the aforementioned European patent In this case, after shaping, the material is hardened by the action of a high-voltage electron beam.
- WO 230 25 056 A1 describes a resin composition consisting of 50 to 95% by mass of an elastomer and 50 to 5% by mass of an ethylene copolymer having a high strength and good elastic properties. This resin contains magnetic powders.
- the object of the present invention is therefore to specify new MREs which have a particularly high variability due to the applied magnetic field with respect to the mechanical properties.
- Another object of the invention is to provide appropriate uses for such magnetorheological elastomers.
- the object is solved by the characterizing features of claim 1.
- the claims 15 and 16 indicate the uses of the invention.
- the subclaims show advantageous developments. According to the present invention, it is thus proposed that special elastomeric carrier media be used, and those which have a shear modulus ⁇ 500 kPa measured at a frequency of 10 Hz and a deformation of 1% kPa, preferably ⁇ 250 kPa. This allows increases in the thrust module to be achieved by a factor of 100 or more.
- the excellent properties of the magnetorheological elastomers according to the invention are attributed to the fact that particularly "soft elastomeric support materials" are used.
- the elastomers of the invention are polymers having a rubber-elastic behavior, which do not work at the temperature of use owing to the crosslinking of the polymer chains viscous flow (see also Römpp Chemie Lexikon, 1st edition, page 1105 ff.)
- the elastomeric carrier media according to the invention be ⁇ sit next to the shear modulus described above, a Shore A hardness of less than 20, preferably less than 10 and an E modulus 1500 kPa, preferably ⁇ 750 kPa
- the shear modulus of the elastomers according to the invention is determined oscillatorily at a constant frequency and shear deformation, and is therefore a material property of the elastomer.
- the high slope of the Schubmo ⁇ pulse in the magnetic field is due to the relatively high mobility of the magnetic particles in the weakly crosslinked elastomer. This ensures that the magnetic forces of attraction between the particles overcome the holding forces generated by the elastomer, so that the particles in the magnetic field become mechanically particularly strong structures. saim ⁇ ienlegen.
- a peculiarity of the MRE's according to the invention is that although the basic shear modulus decreases as expected when the degree of crosslinking in the elastomer decreases, the shear modulus increases in some cases but surprisingly surprisingly in a strong magnetic field.
- the elastomer is selected from silicone or polyurethane, wherein, as already explained, the corresponding shear modulus must be present.
- Elastomers which can be used for the MRE's according to the invention are commercially available, e.g. at Bayer AG or Wacker-Chemie GmbH.
- the elastomers can be prepared in such a way that, starting from the liquid educts, a thermal or photochemical crosslinking is carried out, the educts for producing the elastomers being designed so that a corresponding degree of crosslinking and a corresponding shear modulus, as described in patent claim 1 is required is set.
- Silicone elastomers are prepared, for example, by polyaddition of long-chain, vinyl-containing dimethylsiloxane polymers with short-chain, silane-containing dimethylsiloxane polymers. Depending on the location of the silane groups, the polymers are extended to chains or crosslinked to a three-dimensional network. By varying the silane content, the silicone elastomer resulting from the crosslinking can be used in its degree of crosslinking and thus in its modulatory properties. be adjusted.
- Polyurethane elastomers are synthesized, for example, by polyaddition of hydroxyl and cyanate groups.
- the functionality of the cyanate or hydroxyl reagents in this case determines the degree of crosslinking: bifunctional starting materials extend the molecular chains, trifunctional starting materials form three-dimensional crosslinking sites.
- magnetizable particles it is possible to use all the particles known per se from the prior art for MRE's or for the magnetorheological fluids.
- these are magnetizable particles of soft magnetic materials.
- soft magnetic metallic materials such as iron, cobalt, nickel (also in Vietnamese ⁇ pure form) and alloys thereof such as iron-cobalt, iron-nickel, magnetic steel, iron-silicon and / or mixtures thereof.
- magnetizable particles of soft-magnetic oxide-ceramic materials can be used, such as cubic ferrites, perovskites and garnets of the general formula: MO.Fe 2 Ü 3 with one or more metals from the group Mn, Fe, Co, Ni, Cu, Zn, Ti, Cd or Magne ⁇ sium and / or mixtures thereof. It is also possible to use mixed ferrites such as MnZn, NiZn, NiCo, NiCuCo, NiMg, CuMg ferrites and / or mixtures thereof, as well as particles of iron carbide, iron nitride, alloys of vanadium, tungsten, copper and Manganese and / or mixtures thereof.
- the preferred average particle size is in the range of 5 nm to 10 mm, preferably between 10 nm and 1 mm.
- the particle size distribution can also be bimodal.
- the magnetisable particles can be distributed isotropically or anisotropically in the elastomer matrix.
- An anisotropic arrangement is achieved by imprinting a chain-like structure along the field lines to the magnetisable particles before and / or during crosslinking by application of a magnetic field. Due to the strength of the magnetic field prevailing before or during the cross-linking, subtleties of the embossed structure can be predicted.
- a uniform distribution of the particles in the elastomer matrix is achieved by applying a magnetic field by careful homogenization.
- the magnetorheological elastomers according to the invention may of course also contain additives already known in the art, such as dispersants, antioxidants, defoamers, plasticizers and / or anti-wear agents.
- additives already known in the art such as dispersants, antioxidants, defoamers, plasticizers and / or anti-wear agents.
- a preferred composition of the MRE's according to the invention is as follows:
- the proportion of magnetizable particles is between 5 and 70% by volume, preferably between 10 and 60% by volume.
- the proportion of the elastomeric carrier medium is between 20 and 95% by volume, preferably between 30 and 90% by volume.
- the proportion of additives is up to 20% by mass, preferably between 0.01 and 15% by mass, based on the magnetisable solids.
- the invention further relates to the use of the magnetorheological materials.
- both the storage modulus (describes the elastic behavior or energy storage) and the loss modulus (describes the viscous behavior or energy dissipation) are influenced by the magnetic field.
- a special embodiment of the use of such MRE's consists in the construction of a magnetic circuit with the inclusion of an electromagnet and a permanent magnet.
- a permanent maga- An increased basic stiffness of the elastomer composite can be set.
- the electromagnet can strengthen or weaken the magnetic field and thus either increase or decrease the rigidity of the elastomer composite (modulus of elasticity or shear modulus).
- the operating point can be defined in a vibration-damping system.
- the MREs according to the invention can be used for a number of applications such as, for example, for vibration damping, vibration isolation, actuators, safety switches, haptic systems and artificial muscles.
- Another interesting property of the elastomer composites is the occurrence of a shape memory effect.
- an article molded from the composite material can be deformed by the action of external forces. The new shape is then retained as long as the magnetic field is effective. After switching off the magnetic field, the object returns to its original shape.
- This effect can be attributed to the fact that in the magnetic field, the magnetic forces between the particles dominate, while the behavior without a magnetic field is determined by the elastic forces of the elastomer. A prerequisite for this is that the elastic forces are not too strong.
- a soft elastomer matrix is therefore particularly advantageous; the described behavior can be used, for example, for safety systems or artificial muscles. The invention is explained below with reference to exemplary embodiments and FIGS. 1 to 7:
- silicone polymer PTS-P 7000N ( ⁇ , ⁇ -divinylpoly-dimethylsiloxane, viscosity 7000 mPas, density 0.975 g / cm3 at 23 0 C, Wacker-Chemie GmbH) are in an aluminum container of 250 ml content to 0, 001 g Weighing accuracy weighed.
- 0.5 g of inhibitor PT 67 (density 0.97 g / cm 3 at 23 ° C., Wacker-Chemie GmbH) are added and homogenized with constant stirring by means of a glass rod (diameter 10 mm).
- the preparation is analogous to Embodiment 1 / wherein the amount of iron powder is increased to 93.8 g.
- the preparation is analogous to embodiment 1 / wherein the amount of iron powder is increased to 160.8 g.
- Example 2 The preparation is analogous to Example 1, wherein the addition of the iron powder is omitted.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- Silicone elastomer with 20% by volume of iron particles and crosslinking in the magnetic field
- Embodiment 7 is a diagrammatic representation of Embodiment 7:
- Silicone elastomer with 30 vol .-% iron particles and crosslinking in the magnetic field Silicone elastomer with 30 vol .-% iron particles and crosslinking in the magnetic field
- Embodiment 8 is a diagrammatic representation of Embodiment 8
- Example 4 The preparation is analogous to Example 4, wherein the crosslinking of the silicone in a Magnet ⁇ field of strength 1.28 T.
- the mechanical properties of the cross-linked magnetorheological elastomer samples would be tion rheometer MCR 300 of the company Paar-Physica in one. Magnetic field variable strength examined.
- the disk-shaped sample with a diameter of 20 mm is located between two parallel, horizontally arranged plates, of which the upper plate exerts a predetermined torsional vibration and thus oscillates the sample to shear deformation.
- the magnetic field penetrates the sample vertically, ie perpendicular to the plate plane.
- the amplitude of the shear deformation was kept constant at 0.01 (corresponding to 1%).
- the frequency of the vibration was 10 Hz, the temperature was 25 0 C.
- the current in the magnetic field exciting coil was gradually increased and thus increases the magnetic field strength.
- the memory module describes the elastic behavior of the material (storage of mechanical energy), while the loss modulus describes the viscous behavior of the material (dissipation of mechanical energy and conversion into heat).
- the measurement results are shown in FIGS. 1 to 7.
- the measurement results show that the mechanical properties of the magnetorheological elastomers can be changed to a previously unknown extent by the magnetic field strength.
- the mechanical properties also depend on the volume fraction of the iron particles in the elastomer and on the size distribution, shape and composition of the particles.
- Another influencing factor is the magnetic field which is applied during the crosslinking of the elastomer.
- the storage modulus is increased from an initial value of 30 kPa to a value of almost by a magnetic field applied during the measurement with a flux density of 700 mT 3 MPa, ie by a factor of nearly 100, increased (Figure 1).
- For the loss modulus an increase of 30 kPa to about 1 MPa is achieved in this sample (FIG. 2).
- magnetorheological elastomers according to the invention are their shape memory effect. After a shaped body of the magnetorheological elastomer (eg a cube) has been stiffened in a sufficiently strong magnetic field, it can be deformed by the action of external forces. This changed shape will be retained as long as the magnetic field works. In the case of a stepwise reduction of the magnetic field strength, the shaped body finally returns to its original shape. This shape memory effect can be repeated many times (FIG. 7).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05782886T ATE510288T1 (de) | 2004-08-27 | 2005-08-25 | Magnetorheologische elastomere und deren verwendung |
EP05782886A EP1782438B1 (de) | 2004-08-27 | 2005-08-25 | Magnetorheologische elastomere und deren verwendung |
US11/574,397 US7608197B2 (en) | 2004-08-27 | 2005-08-25 | Magnetorheological elastomers and use thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004041649.4 | 2004-08-27 | ||
DE102004041649A DE102004041649B4 (de) | 2004-08-27 | 2004-08-27 | Magnetorheologische Elastomere und deren Verwendung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006024457A1 true WO2006024457A1 (de) | 2006-03-09 |
Family
ID=35295239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/009195 WO2006024457A1 (de) | 2004-08-27 | 2005-08-25 | Magnetorheologische elastomere und deren verwendung |
Country Status (5)
Country | Link |
---|---|
US (1) | US7608197B2 (de) |
EP (1) | EP1782438B1 (de) |
AT (1) | ATE510288T1 (de) |
DE (1) | DE102004041649B4 (de) |
WO (1) | WO2006024457A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008155109A1 (de) * | 2007-06-21 | 2008-12-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische kompositmaterialien mit hartmagnetischen partikeln, verfahren zu deren herstellung sowie deren verwendung |
DE102009001769A1 (de) | 2008-03-28 | 2009-10-01 | Basf Se | Magnetorheologische Elastomere |
US7897060B2 (en) | 2004-08-27 | 2011-03-01 | Fraunhofer-Gesselschaft Zur Forderung Der Angewandten Forschung E.V. | Magnetorheological materials having a high switching factor and use thereof |
US8123971B2 (en) | 2006-04-10 | 2012-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological elastomers (MREs) with polynorbornene as a carrier medium, processes for producing such elastomer composites and their use |
EP2500589A1 (de) | 2011-03-14 | 2012-09-19 | Aktiebolaget SKF | Lageranordnung |
WO2018189088A1 (en) | 2017-04-10 | 2018-10-18 | Basf Se | Dispersion of magnetizable particles in polyol, its preparation and use |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004041651B4 (de) * | 2004-08-27 | 2006-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische Materialien mit magnetischen und nichtmagnetischen anorganischen Zusätzen und deren Verwendung |
DE102005034925B4 (de) * | 2005-07-26 | 2008-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische Elastomerkomposite sowie deren Verwendung |
DE102006020650B3 (de) * | 2006-05-02 | 2007-08-23 | Thyssenkrupp Presta Ag | Lenksäule für ein Kraftfahrzeug |
WO2008074701A1 (de) * | 2006-12-20 | 2008-06-26 | Basf Se | Anisotrope zellige elastomere |
DE102007017589B3 (de) * | 2007-04-13 | 2008-10-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Dämpfungsvorrichtung mit feldsteuerbarer Flüssigkeit |
DE102008026887B4 (de) * | 2008-06-05 | 2012-02-23 | Tridelta Weichferrite Gmbh | Weichmagnetischer Kompositwerkstoff |
EP2131373B1 (de) | 2008-06-05 | 2016-11-02 | TRIDELTA Weichferrite GmbH | Weichmagnetischer Werkstoff und Verfahren zur Herstellung von Gegenständen aus diesem weichmagnetischen Werkstoff |
DE102008057575A1 (de) * | 2008-11-15 | 2010-05-20 | Bayerische Motoren Werke Aktiengesellschaft | Aktor mit einem magnetorheologischen Elastomer-Element |
DE102008044388A1 (de) * | 2008-12-05 | 2010-06-10 | Holger Redtel | Materialien mit elektrisch bzw. magnetisch induzierter Einstellung mechanischer Eigenschaften |
US8820492B1 (en) | 2009-08-31 | 2014-09-02 | Advanced Materials And Devices, Inc. | Soft matrix magnetorheological mounts for shock and vibration isolation |
DE102012202418A1 (de) | 2011-11-04 | 2013-05-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Adaptive Feststell-und Lösevorrichtung und deren Verwendung zum gesteuerten Blockieren bzw. Freigeben beweglicher Bauteile |
KR101724747B1 (ko) | 2011-11-23 | 2017-04-10 | 현대자동차주식회사 | Mre를 이용한 가변형 디퍼런셜 마운트 장치 |
US10414054B2 (en) * | 2013-03-29 | 2019-09-17 | Koninklijke Philips N.V. | Force feedback gripping device with magnetorheological based actuator |
WO2014201913A1 (zh) * | 2013-06-19 | 2014-12-24 | 哈尔滨工业大学 | 一种基于磁流变弹性体的板材软模成形装置及方法 |
DE102014222832A1 (de) * | 2014-11-10 | 2016-05-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Linearaktor und dessen Verwendung |
JP2016102906A (ja) * | 2014-11-28 | 2016-06-02 | キヤノン株式会社 | 画像加熱装置、定着装置、及び画像形成装置 |
CN104725835B (zh) * | 2015-04-07 | 2018-04-20 | 重庆大学 | 一种受磁场控制阻尼显著变化的粘弹性材料 |
US10173349B2 (en) | 2016-01-21 | 2019-01-08 | The Boeing Company | Bladder that changes stiffness based on temperature effects for manufacture of composite components |
JP6113351B1 (ja) * | 2016-03-25 | 2017-04-12 | 富士高分子工業株式会社 | 磁気粘弾性エラストマー組成物、その製造方法及びこれを組み込んだ振動吸収装置 |
CN106970340B (zh) * | 2017-04-12 | 2023-07-28 | 浙江师范大学 | 一种基于各向异性磁流变弹性体的磁场强度测量装置 |
CN110709475A (zh) * | 2017-06-05 | 2020-01-17 | 株式会社阿瑞斯科技 | 成形品、食品制造装置用部件及食品制造用高分子制品 |
DE102018112683A1 (de) * | 2017-07-03 | 2019-01-03 | Fuji Polymer Industries Co., Ltd. | Verfahren und Vorrichtung zum Herstellen eines radial ausgerichteten magnetorheologischen Elastomer-Formkörpers |
CN108727710B (zh) * | 2018-06-05 | 2019-12-17 | 重庆大学 | 具有高耐热及拉伸特性的磁流变弹性体的制备方法 |
CN109504097A (zh) * | 2019-01-09 | 2019-03-22 | 兰州理工大学 | 一种复合磁敏弹性体及其制备方法 |
US11158450B2 (en) * | 2019-06-17 | 2021-10-26 | International Business Machines Corporation | Particle-based, anisotropic composite materials for magnetic cores |
KR20210010175A (ko) * | 2019-07-19 | 2021-01-27 | 현대자동차주식회사 | 자기유변 탄성체 |
CN113515868A (zh) * | 2021-08-04 | 2021-10-19 | 常熟理工学院 | 一种磁流变弹性体的链簇模型构建方法及性能估测方法 |
CN113757296B (zh) * | 2021-09-08 | 2023-03-21 | 青岛大学 | 一种刚度可调节的磁流变弹性体减震器及其制备工艺 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0784163A1 (de) * | 1996-01-11 | 1997-07-16 | Ford Motor Company Limited | Magnetorheologisches Elastomer benutzende Buchse mit veränderlicher Steifigkeit |
US6027664A (en) * | 1995-10-18 | 2000-02-22 | Lord Corporation | Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid |
WO2001061713A1 (en) * | 2000-02-18 | 2001-08-23 | The Board Of Regents Of The University And Community College System Of Nevada | Magnetorheological polymer gels |
Family Cites Families (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575360A (en) * | 1947-10-31 | 1951-11-20 | Rabinow Jacob | Magnetic fluid torque and force transmitting device |
DE1024439B (de) * | 1952-05-24 | 1958-02-13 | Johan E Graae | Vollmantel-Zentrifuge |
US2938183A (en) * | 1956-11-09 | 1960-05-24 | Bell Telephone Labor Inc | Single crystal inductor core of magnetizable garnet |
US3425666A (en) * | 1963-02-21 | 1969-02-04 | Chevron Res | Process for producing ferrimagnetic materials |
US3426666A (en) | 1966-03-14 | 1969-02-11 | Mamiya Camera | Single-lens reflex camera using cartridge film |
GB1428000A (en) * | 1972-03-07 | 1976-03-10 | Lignes Telegraph Telephon | Magnetic materials for magnetic circuits |
JPS6259564A (ja) * | 1985-09-10 | 1987-03-16 | 日本碍子株式会社 | セラミツクス用成形助剤及びそれを用いて得られた成形体並びにセラミツクス製品の製造法 |
DE3890400C2 (de) | 1987-05-19 | 1994-02-10 | Bridgestone Corp | Verwendung einer Kautschukmischung in der Laufschicht von Luftreifen |
US5771013A (en) * | 1989-05-01 | 1998-06-23 | Dow Corning Corporation | Method for stabilizing compositions containing carbonyl iron powder |
US5002677A (en) * | 1989-09-19 | 1991-03-26 | The B. F. Goodrich Company | Flexible high energy magnetic blend compositions based on ferrite particles in highly saturated nitrile rubber and methods of processing the same |
JPH03119041A (ja) | 1989-09-30 | 1991-05-21 | Yokohama Rubber Co Ltd:The | タイヤトレッド用ゴム組成物 |
DE4101869A1 (de) | 1991-01-23 | 1992-07-30 | Basf Ag | Kunststoffmischung mit ferromagnetischen oder ferroelektrischen fuellstoffen |
EP0636273B1 (de) * | 1992-04-14 | 1997-08-20 | Byelocorp Scientific, Inc. | Magnetorheologische flüssigkeiten und herstellungsverfahrens |
EP0667029B1 (de) * | 1992-10-30 | 1998-09-23 | Lord Corporation | Magnetorheologische thixotrope materialien |
US5578238A (en) * | 1992-10-30 | 1996-11-26 | Lord Corporation | Magnetorheological materials utilizing surface-modified particles |
WO1994010694A1 (en) * | 1992-10-30 | 1994-05-11 | Lord Corporation | Magnetorheological materials utilizing surface-modified particles |
US5549837A (en) | 1994-08-31 | 1996-08-27 | Ford Motor Company | Magnetic fluid-based magnetorheological fluids |
US5579837A (en) * | 1995-11-15 | 1996-12-03 | Ford Motor Company | Heat exchanger tube and method of making the same |
DE19613194A1 (de) * | 1996-04-02 | 1997-10-09 | Huels Chemische Werke Ag | Reifenlaufflächen mit geringem Rollwiderstand und verbessertem ABS-Bremsen |
US5667715A (en) * | 1996-04-08 | 1997-09-16 | General Motors Corporation | Magnetorheological fluids |
DE19614140C1 (de) | 1996-04-10 | 1997-05-07 | B & F Formulier Und Abfuell Gm | Verfahren zur Herstellung einer Dichtungsmasse |
DE19725971A1 (de) | 1997-06-19 | 1998-12-24 | Huels Silicone Gmbh | RTV-Siliconkautschuk-Mischungen |
US5985168A (en) * | 1997-09-29 | 1999-11-16 | University Of Pittsburgh Of The Commonwealth System Of Higher Education | Magnetorheological fluid |
US5971835A (en) * | 1998-03-25 | 1999-10-26 | Qed Technologies, Inc. | System for abrasive jet shaping and polishing of a surface using magnetorheological fluid |
US6123633A (en) * | 1998-09-03 | 2000-09-26 | Wilson Sporting Goods Co. | Inflatable game ball with a lobular carcass and a relatively thin cover |
US6399193B1 (en) * | 1998-12-18 | 2002-06-04 | The University Of Massachusetts Lowell | Surfacing laminate with bonded with pigmented pressure sensitive adhesive |
US6203717B1 (en) * | 1999-07-01 | 2001-03-20 | Lord Corporation | Stable magnetorheological fluids |
US6132633A (en) * | 1999-07-01 | 2000-10-17 | Lord Corporation | Aqueous magnetorheological material |
US6599439B2 (en) * | 1999-12-14 | 2003-07-29 | Delphi Technologies, Inc. | Durable magnetorheological fluid compositions |
US6395193B1 (en) * | 2000-05-03 | 2002-05-28 | Lord Corporation | Magnetorheological compositions |
DE10024439A1 (de) | 2000-05-19 | 2001-12-06 | Koppe Franz | Verguss- oder Einbettmasse mit elektromagnetischen Abschirmeigenschaften zur Herstellung elektronischer Bauteile |
US6451219B1 (en) * | 2000-11-28 | 2002-09-17 | Delphi Technologies, Inc. | Use of high surface area untreated fumed silica in MR fluid formulation |
JP4104978B2 (ja) | 2000-11-29 | 2008-06-18 | ジ アドバイザー − ディフェンス リサーチ アンド ディベラップメント オーガナイゼイション | 磁気流動学的流体組成物およびその製造方法 |
US6610404B2 (en) * | 2001-02-13 | 2003-08-26 | Trw Inc. | High yield stress magnetorheological material for spacecraft applications |
JP3608612B2 (ja) * | 2001-03-21 | 2005-01-12 | 信越化学工業株式会社 | 電磁波吸収性熱伝導組成物及び熱軟化性電磁波吸収性放熱シート並びに放熱施工方法 |
US20030030026A1 (en) | 2001-08-06 | 2003-02-13 | Golden Mark A. | Magnetorheological fluids |
US20030034475A1 (en) | 2001-08-06 | 2003-02-20 | Ulicny John C. | Magnetorheological fluids with a molybdenum-amine complex |
US6855426B2 (en) * | 2001-08-08 | 2005-02-15 | Nanoproducts Corporation | Methods for producing composite nanoparticles |
US20030042461A1 (en) | 2001-09-04 | 2003-03-06 | Ulicny John C. | Magnetorheological fluids with an additive package |
US20040186234A1 (en) * | 2001-09-14 | 2004-09-23 | Masashi Tsukamoto | Resin composition |
US6592772B2 (en) * | 2001-12-10 | 2003-07-15 | Delphi Technologies, Inc. | Stabilization of magnetorheological fluid suspensions using a mixture of organoclays |
US20040126565A1 (en) * | 2002-05-09 | 2004-07-01 | Ganapathy Naganathan | Actively controlled impact elements |
US7560160B2 (en) * | 2002-11-25 | 2009-07-14 | Materials Modification, Inc. | Multifunctional particulate material, fluid, and composition |
US7261834B2 (en) * | 2003-05-20 | 2007-08-28 | The Board Of Regents Of The University And Community College System Of Nevada On Behalf Of The University Of Nevada, Reno | Tunable magneto-rheological elastomers and processes for their manufacture |
US7419616B2 (en) * | 2004-08-13 | 2008-09-02 | Gm Global Technology Operations, Inc. | Magnetorheological fluid compositions |
DE102004041650B4 (de) * | 2004-08-27 | 2006-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische Materialien mit hohem Schaltfaktor und deren Verwendung |
DE102004041651B4 (de) * | 2004-08-27 | 2006-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische Materialien mit magnetischen und nichtmagnetischen anorganischen Zusätzen und deren Verwendung |
DE102005034925B4 (de) | 2005-07-26 | 2008-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische Elastomerkomposite sowie deren Verwendung |
US7393463B2 (en) * | 2005-09-16 | 2008-07-01 | Gm Global Technology Operations, Inc. | High temperature magnetorheological fluid compositions and devices |
US7354528B2 (en) * | 2005-09-22 | 2008-04-08 | Gm Global Technology Operations, Inc. | Magnetorheological fluid compositions |
-
2004
- 2004-08-27 DE DE102004041649A patent/DE102004041649B4/de not_active Expired - Fee Related
-
2005
- 2005-08-25 WO PCT/EP2005/009195 patent/WO2006024457A1/de active Application Filing
- 2005-08-25 AT AT05782886T patent/ATE510288T1/de active
- 2005-08-25 US US11/574,397 patent/US7608197B2/en not_active Expired - Fee Related
- 2005-08-25 EP EP05782886A patent/EP1782438B1/de not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6027664A (en) * | 1995-10-18 | 2000-02-22 | Lord Corporation | Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid |
EP0784163A1 (de) * | 1996-01-11 | 1997-07-16 | Ford Motor Company Limited | Magnetorheologisches Elastomer benutzende Buchse mit veränderlicher Steifigkeit |
WO2001061713A1 (en) * | 2000-02-18 | 2001-08-23 | The Board Of Regents Of The University And Community College System Of Nevada | Magnetorheological polymer gels |
Non-Patent Citations (5)
Title |
---|
DAVIS L C: "Model of magnetorheological elastomers", JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 85, no. 6, 15 March 1999 (1999-03-15), pages 3348 - 3351, XP012046944, ISSN: 0021-8979 * |
GINDER J M ; NICHOLS M E ; ELIE L D ; TARDIFF J L: "Magnetorheological elastomers: Properties and applications", PROC SPIE INT SOC OPT ENG; PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 1999 SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, BELLINGHAM, WA, USA, vol. 3675, March 1999 (1999-03-01), pages 131 - 138, XP002355156 * |
JOLLY M R ET AL: "A model of the behavior of magnetorheological materials", SMART MATERIALS AND STRUCTURES, IOP PUBLISHING LTD., BRISTOL, GB, vol. 5, 1996, pages 607 - 614, XP002030580, ISSN: 0964-1726 * |
JOLLY MARK R ET AL: "Magnetoviscoelastic response of elastomer composites consisting of ferrous particles embedded in a polymer matrix", J INTELL MATER SYST STRUCT; JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES NOV 1996, vol. 7, no. 6, November 1996 (1996-11-01), NY, US, pages 613 - 622, XP009057466 * |
SHEN Y. ET AL.: "Experimental research and modeling of magnetorheological elastomers", JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES SAGE PUBLICATIONS USA, vol. 16, no. 2, January 2004 (2004-01-01), pages 27 - 35, XP002355157, ISSN: 1045-389X * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7897060B2 (en) | 2004-08-27 | 2011-03-01 | Fraunhofer-Gesselschaft Zur Forderung Der Angewandten Forschung E.V. | Magnetorheological materials having a high switching factor and use thereof |
US8123971B2 (en) | 2006-04-10 | 2012-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological elastomers (MREs) with polynorbornene as a carrier medium, processes for producing such elastomer composites and their use |
WO2008155109A1 (de) * | 2007-06-21 | 2008-12-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheologische kompositmaterialien mit hartmagnetischen partikeln, verfahren zu deren herstellung sowie deren verwendung |
DE102009001769A1 (de) | 2008-03-28 | 2009-10-01 | Basf Se | Magnetorheologische Elastomere |
EP2500589A1 (de) | 2011-03-14 | 2012-09-19 | Aktiebolaget SKF | Lageranordnung |
DE102011005494A1 (de) * | 2011-03-14 | 2012-09-20 | Aktiebolaget Skf | Lageranordnung |
DE102011005494B4 (de) * | 2011-03-14 | 2012-12-06 | Aktiebolaget Skf | Lageranordnung |
WO2018189088A1 (en) | 2017-04-10 | 2018-10-18 | Basf Se | Dispersion of magnetizable particles in polyol, its preparation and use |
Also Published As
Publication number | Publication date |
---|---|
EP1782438B1 (de) | 2011-05-18 |
US20080318045A1 (en) | 2008-12-25 |
DE102004041649B4 (de) | 2006-10-12 |
US7608197B2 (en) | 2009-10-27 |
DE102004041649A1 (de) | 2006-03-02 |
ATE510288T1 (de) | 2011-06-15 |
EP1782438A1 (de) | 2007-05-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1782438B1 (de) | Magnetorheologische elastomere und deren verwendung | |
EP1907724B1 (de) | Magnetorheologische elastomerkomposite sowie deren verwendung | |
DE60008533T2 (de) | Stabile magnetorheologische flüssigkeiten | |
EP2010598A1 (de) | Magneto-rheologische elastomere (mre) mit polynorbornen als trägermedium, verfahren zur herstellung solcher elastomerkomposite sowie deren verwendung | |
US7897060B2 (en) | Magnetorheological materials having a high switching factor and use thereof | |
EP2160741B1 (de) | Magnetorheologische kompositmaterialien mit hartmagnetischen partikeln, verfahren zu deren herstellung sowie deren verwendung | |
EP1198803B1 (de) | Wasserhaltige magnetorheologische materialien | |
DE1944432C3 (de) | Dauermagnet | |
EP1782439B1 (de) | Magnetorheologische materialien mit magnetischen und nichtmagnetischen anorganischen zusätzen und deren verwendung | |
Yu et al. | A dimorphic magnetorheological elastomer incorporated with Fe nano-flakes modified carbonyl iron particles: Preparation and characterization | |
EP1423859A1 (de) | Magnetorheologische fluide mit einem zusatzstoffpaket | |
US20030034475A1 (en) | Magnetorheological fluids with a molybdenum-amine complex | |
DE112010002358T5 (de) | Magnetorheologische Zusammensetzungen, die nicht-magnetisches Material umfassen | |
DE102018112683A1 (de) | Verfahren und Vorrichtung zum Herstellen eines radial ausgerichteten magnetorheologischen Elastomer-Formkörpers | |
CN111564274A (zh) | 单晶磁粉及其磁流变流体和方法 | |
KR101602315B1 (ko) | 판 형상의 철 입자들을 포함하는 자기유변유체 | |
KR100936013B1 (ko) | 자기가변 점성유체 조성물 | |
Sherje et al. | Synthesis and Optimization of Magneto-Rheological Fluid for Dampers of Suspension System | |
Sobri et al. | Assessment of Various Additives in Magnetorheological-Elastomer for Impact Applications | |
US20040206929A1 (en) | Magnetorheological fluids with a molybdenum-amine complex |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005782886 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11574397 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2005782886 Country of ref document: EP |