JPH01278598A - Electroviscous fluid - Google Patents
Electroviscous fluidInfo
- Publication number
- JPH01278598A JPH01278598A JP10828188A JP10828188A JPH01278598A JP H01278598 A JPH01278598 A JP H01278598A JP 10828188 A JP10828188 A JP 10828188A JP 10828188 A JP10828188 A JP 10828188A JP H01278598 A JPH01278598 A JP H01278598A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- dispersed particles
- aqueous liquid
- weight
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 37
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001913 cellulose Substances 0.000 claims abstract description 10
- 229920002678 cellulose Polymers 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 8
- 235000019198 oils Nutrition 0.000 claims abstract description 8
- 229920002545 silicone oil Polymers 0.000 claims abstract description 6
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 claims abstract description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011737 fluorine Substances 0.000 claims abstract description 5
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 5
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 235000019000 fluorine Nutrition 0.000 claims abstract description 4
- 239000002480 mineral oil Substances 0.000 claims abstract description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 4
- 239000008158 vegetable oil Substances 0.000 claims abstract description 4
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 16
- 230000005684 electric field Effects 0.000 description 9
- 235000010980 cellulose Nutrition 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 8
- 235000011187 glycerol Nutrition 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 2
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
- 235000021240 caseins Nutrition 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 2
- 239000008108 microcrystalline cellulose Substances 0.000 description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000004670 Glycyrrhiza echinata Species 0.000 description 1
- 235000001453 Glycyrrhiza echinata Nutrition 0.000 description 1
- 235000006200 Glycyrrhiza glabra Nutrition 0.000 description 1
- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- -1 benzyl alcohol, amides Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940010454 licorice Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は電気粘性流体に関し、さらに詳細には、外部
電界により応答してその粘性か変化する電気粘性流体に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to electrorheological fluids, and more particularly to electrorheological fluids whose viscosity changes in response to an external electric field.
特定の分散媒に固体粒子を混合・分散させた分散液にお
いて、外部電界によってその分散液の粘性が著しく変動
する現象は、いわゆるウィンズロ効果として知られてる
。In a dispersion liquid in which solid particles are mixed and dispersed in a specific dispersion medium, the phenomenon in which the viscosity of the dispersion liquid changes significantly due to an external electric field is known as the so-called Winslow effect.
このようなウィンズロ効果を示す流体として、塩化ジフ
ェニル、塩化ベンゼン、セハンン酸ジブチル、シリコー
ンオイルなどの分散媒に、微結晶セルロース、ンリカケ
ル、大豆カセイン、デンプン、イオン交換樹脂などの分
散質を混合・分散した電気粘性流体が知られている。従
来ては、水を吸着させたンリカなとの分散質を用いるこ
とか提案されてる（特公昭４５−１．００４８号公報お
よび特開昭４８−１７８０６号公報など）。Fluids exhibiting this Winslow effect include mixing and dispersing dispersoids such as microcrystalline cellulose, soybean casein, starch, and ion exchange resin in dispersion media such as diphenyl chloride, benzene chloride, dibutyl sehanate, and silicone oil. Electrorheological fluids are known. Conventionally, it has been proposed to use a dispersoid of phosphorus adsorbed with water (Japanese Patent Publication No. 45-1.0048 and Japanese Patent Application Laid-open No. 17806/1983, etc.).
しかしながら、従来の電気流体では、電界強度の変化の
割合に対して粘度変化の割合が少なく、ウィンズロ効果
が顕著に現れず、また、吸着した水分か遊離することに
より、ウィンズロ効果か急速に減少して消滅することが
多く、従って、高温での保存特性に著しく劣り、経時的
に粘度変化か減少する。However, in conventional electric fluids, the ratio of viscosity change to the ratio of electric field strength change is small, so the Winslow effect does not appear significantly, and the Winslow effect rapidly decreases due to the release of adsorbed water. Therefore, the storage properties at high temperatures are significantly poor, and the viscosity changes or decreases over time.
この発明は、」二記の背景に基づきなされたものであり
、その１」的とするところは、高温での保存特性に優れ
、顕著なウィズロ効果を示す電気粘性流体を提供するこ
とである。This invention has been made based on the following two backgrounds, and the first objective is to provide an electrorheological fluid that has excellent storage characteristics at high temperatures and exhibits a remarkable Withro effect.
本発明名らは上記問題点を解決すべく種々の検討した結
果、分散質として、非水液を吸着した分散粒子を用いれ
ば、この発明の目的達成に有効であることを見出し、こ
の発明を完成するに至った。As a result of various studies to solve the above-mentioned problems, the inventors of the present invention discovered that it is effective to achieve the object of the present invention by using dispersed particles adsorbing a non-aqueous liquid as the dispersoid. It was completed.
すなわち、この発明の電気粘性流体は、非水液で表面処
理した分散粒子を、電気絶縁性流体に分散してなること
を特徴とするものである。That is, the electrorheological fluid of the present invention is characterized in that dispersed particles whose surface has been treated with a non-aqueous liquid are dispersed in an electrically insulating fluid.
この発明の好ましい態様において、非水液として多価ア
ルコールを、また、分散粒子として、セルロースを用い
ることかできる。In a preferred embodiment of this invention, polyhydric alcohol can be used as the non-aqueous liquid and cellulose can be used as the dispersed particles.
この発明のより具体的な態様において、分散粒子に吸着
されている非水液の吸呑量を、分散粒子に対して３重量
％以上、より好ましくは４重量％以上、最も好ましくは
５重量％以上に限定することかできる。In a more specific embodiment of the present invention, the amount of nonaqueous liquid adsorbed on the dispersed particles is 3% by weight or more, more preferably 4% by weight or more, and most preferably 5% by weight based on the dispersed particles. It is possible to limit the above.
この発明の好ましい態様において、電気絶縁性流体とし
て、シリコンオイル、植物油、フッ素オイル、塩化ジフ
ェニル、鉱油、セバシン酸ジブチル、トルエン、または
ベンセンから選ばれた少なくとも１種の流体を用いるこ
とかできる。In a preferred embodiment of the invention, at least one fluid selected from silicone oil, vegetable oil, fluorine oil, diphenyl chloride, mineral oil, dibutyl sebacate, toluene, or benzene can be used as the electrically insulating fluid.
以下、この発明を、より詳細に説明する。This invention will be explained in more detail below.
分散粒子
この発明に於いて用いられる分散粒子は、非水液で表面
処理されたものである。Dispersed Particles The dispersed particles used in this invention are surface-treated with a non-aqueous liquid.
具体的に用いるものことかできる非水液として、グリセ
リン、ベンンルアルコールなとのアルコール、メチルホ
ルムアミドなとのアミド類、ホルムアルデヒドなどのア
ルデヒド類、その他などがあり、また、導電性を向」ニ
させるために、数種類の液体を混合したものがある。こ
の発明で用いることかできる好ましい非水液には、アル
コール、特にグリセリンなどの多価アルコールがある。Specific examples of non-aqueous liquids that can be used include glycerin, alcohols such as benzyl alcohol, amides such as methylformamide, aldehydes such as formaldehyde, and others. Some liquids are made by mixing several types of liquids to achieve this. Preferred non-aqueous liquids that can be used in this invention include alcohols, especially polyhydric alcohols such as glycerin.
非水液の処理量、すなわち、分散粒子に対する非水液の
吸着量は、非水液の種類、分散粒子の種類などに応じて
適宜変更選択することができ、多価アルコールの場合、
分散粒子に吸着されている非水液の吸着量を、分散粒子
に対して３重量％以上、より好ましくは４重量％以上、
最も好ましくは５重量％以上に限定することができる。The amount of non-aqueous liquid to be treated, that is, the amount of non-aqueous liquid adsorbed to the dispersed particles, can be changed and selected as appropriate depending on the type of non-aqueous liquid, the type of dispersed particles, etc. In the case of polyhydric alcohol,
The adsorption amount of the non-aqueous liquid adsorbed on the dispersed particles is 3% by weight or more, more preferably 4% by weight or more, based on the dispersed particles.
Most preferably, it can be limited to 5% by weight or more.
この発明で用いることができる非水液には、導電性を向
上もしくは調製するために塩類などの添加物を含めても
よい。The non-aqueous liquid that can be used in this invention may contain additives such as salts in order to improve or adjust conductivity.
非水液での表面処理の方法は、種々の方法で実施するこ
とができ、例えば、分散粒子を乾燥し、揮発性有機溶媒
で非水液の処理溶液を調製し、次いで、この処理溶液に
分散粒子を浸漬し、浸漬した分散粒子を加熱し、揮発性
有機溶媒を蒸発除去して得ることかできる。The method of surface treatment with a non-aqueous liquid can be carried out in various ways, for example, by drying the dispersed particles, preparing a non-aqueous treatment solution with a volatile organic solvent, and then adding the treated solution to the non-aqueous liquid. It can be obtained by immersing dispersed particles, heating the immersed dispersed particles, and evaporating off the volatile organic solvent.
非水液で表面処理される分散粒子は、例えば、１〜１０
０μｍ５好ましくは１０〜４０μｍの平均粒径を持つも
のであり、その祠質として、例えば、微結晶セルロース
、シリカゲル、大豆カセイン、デンプン、イオン交換樹
脂などかあり、好ましい具体例として、セルロースがあ
る。Dispersed particles whose surface is treated with a non-aqueous liquid are, for example, 1 to 10
It has an average particle size of 0 μm5, preferably 10 to 40 μm, and its abrasive materials include, for example, microcrystalline cellulose, silica gel, soybean casein, starch, and ion exchange resin, and a preferred specific example is cellulose.
電気粘性流体
この発明の電気粘性流体は、前記に詳説した非水液処理
分散粒子の粉末を、電気絶縁性流体に分散してなる。Electrorheological Fluid The electrorheological fluid of the present invention is made by dispersing the powder of the non-aqueous liquid treated dispersion particles detailed above in an electrically insulating fluid.
この発明において用いることができる電気絶縁性流体に
は、例えば、樹脂油、脂肪油、パラフィン系炭化水素、
ナフテン系炭化水素、オレフィン系炭化水素、塩素化油
、ンリコーンオイル、フッ素オイルなとかあり、好まし
いものとして、シリコンオイル、植物油、フッ素オイル
、塩化ジフェニル、鉱油、セバシン酸ジブチルなどかあ
る。Electrically insulating fluids that can be used in this invention include, for example, resin oils, fatty oils, paraffinic hydrocarbons,
These include naphthenic hydrocarbons, olefinic hydrocarbons, chlorinated oils, licorice oils, and fluorine oils, and preferred ones include silicone oils, vegetable oils, fluorine oils, diphenyl chloride, mineral oils, and dibutyl sebacate.
また、上記の絶縁面に加えて、トルエン、ベンセンなど
の溶剤を用いることかでき、史に、比重調整のために上
記の液体を組合せて用いることができる。Further, in addition to the above-mentioned insulating surface, a solvent such as toluene or benzene can be used, and a combination of the above-mentioned liquids can be used to adjust the specific gravity.
分散粒子の粉末と、電気絶縁性流体との配合割合は、用
途、種類などに応じて適宜選択することかできる。例え
ば、電気絶縁性流体１００重量部に対して、分散粒子の
粉末を１〜４０重量部、好ましくは、１０〜３０重量部
にすることができる。The blending ratio of the dispersed particle powder and the electrically insulating fluid can be appropriately selected depending on the application, type, etc. For example, the amount of dispersed particle powder can be 1 to 40 parts by weight, preferably 10 to 30 parts by weight, based on 100 parts by weight of the electrically insulating fluid.
分散粒子の粉末の電気絶縁性流体への分散は、種々の方
法で実施することかできる。そのような方法として、振
動ミル、ボールミルなどの手段がある。Dispersion of the powder of dispersed particles into an electrically insulating fluid can be accomplished in a variety of ways. Examples of such methods include vibration mills and ball mills.
この発明において、分散粒子以外に、電気絶縁性流体に
１」的に応じて種々の添加物を含めることができる。In this invention, in addition to the dispersed particles, various additives can be included depending on the electrically insulating fluid.
上記に述べた技術的構成を有するこの発明では、理論的
に必ずしも明らかではないが、多価アルコールなどの非
水液で表面処理した分散粒子が、電気絶縁性流体に分散
されているので、分散粒子に導電性か付与され、外部電
界によってその分散液の粘性が著しく変動する現象は、
いわゆるウィンズロ効果を示す。In this invention having the above-mentioned technical configuration, although it is not necessarily theoretically clear, dispersed particles whose surface has been treated with a non-aqueous liquid such as polyhydric alcohol are dispersed in an electrically insulating fluid. The phenomenon in which conductivity is imparted to particles and the viscosity of the dispersion changes significantly due to an external electric field is
This shows the so-called Winslow effect.
この発明により次の効果を得ることかできる。 With this invention, the following effects can be obtained.
請求項］による電気粘性流体では、分散質表面か非水液
で処理されているので、外部電界によってその分散液の
粘性か著しく変動し、従来の水吸着に比べ電界強度の変
化の割合に対して粘度変化の割合が大きい。In the electrorheological fluid according to claim 1, since the surface of the dispersoid is treated with a non-aqueous liquid, the viscosity of the dispersion varies significantly depending on the external electric field, and compared to conventional water adsorption, the viscosity of the dispersion varies significantly compared to the rate of change in electric field strength. The rate of viscosity change is large.
請求項２および３による電気粘性流体では、処理液とし
て高沸点の多価アルコールを用いるので高温における蒸
気圧は水に比べて著しく低く、分散質としてセルロース
か用いられるので、顕著なウィンズロ効果を示し、より
良好な耐熱性を有する電気粘性流体を得ることかできる
。In the electrorheological fluid according to claims 2 and 3, since a polyhydric alcohol with a high boiling point is used as the processing liquid, the vapor pressure at high temperatures is significantly lower than that of water, and since cellulose is used as the dispersoid, a remarkable Winslow effect is exhibited. , an electrorheological fluid with better heat resistance can be obtained.
Ｃ実施例〕 この発明を例を示して具体的に説明する。C Example] This invention will be specifically explained by showing an example.
実施例］
セルロース粒子（ＭＥＲＣＫ社製、Ａｖｕｃｅ１２３３
１、商標）に対してグリセリン（和光純薬製、特級）を
１．３．５．１０，１５、および２０重量％、下記の方
法で吸着させた。Examples] Cellulose particles (manufactured by MERCK, Avuce1233
1.3.5.10, 15, and 20% by weight of glycerin (manufactured by Wako Pure Chemical Industries, Ltd., special grade) were adsorbed on Glycerin (trademark) by the following method.
セルロース粒子を１００℃、２時間以上乾燥して分散粒
子原料として調製した。また、非水液としてのグリセリ
ンを所定の割合でメチルアルコール（和光純薬製、特級
）で希釈し、前記の乾燥セルロースを浸漬し、撹拌後に
、８０℃のオーブン中でメチルアルコールを除去した。Cellulose particles were dried at 100°C for 2 hours or more to prepare a raw material for dispersed particles. Further, glycerin as a non-aqueous liquid was diluted with methyl alcohol (manufactured by Wako Pure Chemical Industries, Ltd., special grade) at a predetermined ratio, and the dried cellulose was immersed therein, and after stirring, the methyl alcohol was removed in an oven at 80°C.
得られたセルロースの分散粒子のグリセリン吸＠量を天
秤で確認後、得られたセルロースの分散粒子をシリコー
ンオイル（信越シリコーン製、Ｋ Ｆ ９６、粘度、１
０ｃｓ）中に分散して粒子ニオイルの重量比が３０ニア
０の分散液を振動ミルで撹拌して調製した。After checking the amount of glycerin absorbed by the obtained cellulose dispersed particles using a balance, the obtained cellulose dispersed particles were mixed with silicone oil (manufactured by Shin-Etsu Silicone, K F 96, viscosity: 1
A dispersion liquid having a weight ratio of 30 niOcs) was prepared by stirring with a vibrating mill.
得られたこの発明による電気粘性液体を、第１図に示す
測定装置を用いて、電界強度変化による粘度変化を測定
した。The viscosity change of the obtained electrorheological liquid according to the present invention due to the change in electric field strength was measured using the measuring device shown in FIG.
第２図に、グリセリン吸着量と、電界強度変化による粘
度変化の関係を示す。この図より、分散粒子に対して３
重量％以上、より好ましくは４重量％以上、最も好まし
くは５重量％以上の吸着量であることかわかる。FIG. 2 shows the relationship between the adsorbed amount of glycerin and the viscosity change due to the change in electric field strength. From this figure, it can be seen that 3
It can be seen that the adsorption amount is at least 4% by weight, more preferably at least 4% by weight, and most preferably at least 5% by weight.
更に、得られたこの発明による電気粘性液体（１５％吸
着量）について、１０５°Ｃの耐熱試験をした。その結
果を第３図に示す。このグラフより、害られた電気粘性
流体は、顕著なウィンズロ効果を示し、また、高温の条
件で放置された電気粘性流体も特性が劣化することかな
いことか分かる。Furthermore, the obtained electrorheological liquid (15% adsorption amount) according to the present invention was subjected to a heat resistance test at 105°C. The results are shown in FIG. From this graph, it can be seen that the damaged electrorheological fluid exhibits a remarkable Winslow effect, and that the characteristics of the electrorheological fluid left under high temperature conditions do not deteriorate.
比較例
非水液で表面処理せず、水を空気中で約５重量％吸着さ
せたこと以外、実施例１と同様に電気粘性液体を調製し
、耐熱試験をした。Comparative Example An electrorheological liquid was prepared in the same manner as in Example 1, except that the surface was not treated with a non-aqueous liquid and about 5% by weight of water was adsorbed in the air, and a heat resistance test was conducted.
その結果を第３図に示す。この結果から、数時間で劣化
し始めて耐熱性に劣ることか分かる。The results are shown in FIG. From this result, it can be seen that it begins to deteriorate in a few hours and has poor heat resistance.
第１図は実施例で用いたδ１り定装置の概略図、第２図
は、グリセリン吸着量と、電界強度変化による粘度変化
の関係を示すグラフ、第３図は実施例１および比較例で
得られた電気粘性液体の耐熱試験の結果を示すグラフで
ある。
出ｍ１人代理人 佐 藤 −雄
第１図Figure 1 is a schematic diagram of the δ1 determination device used in the examples, Figure 2 is a graph showing the relationship between the adsorbed amount of glycerin and viscosity changes due to changes in electric field strength, and Figure 3 is a schematic diagram of the δ1 determination device used in the examples. It is a graph showing the results of a heat resistance test of the obtained electrorheological liquid. Figure 1: 1 representative, Mr. Sato
Claims (1)
に分散してなる電気粘性流体。 ２、非水液が、多価アルコールからなる、請求項１記載
の電気粘性流体。 ３、分散粒子がセルロースである、請求項１または２記
載の電気粘性流体。 ４、分散粒子に吸着されている非水液の吸着量が、分散
粒子に対して３重量％以上である、請求項１、２または
３記載の電気粘性流体。 ５、電気絶縁性流体が、シリコンオイル、植物油、フッ
素オイル、塩化ジフェニル、鉱油、セバシン酸ジブチル
、トルエン、またはベンゼンから選ばれた少なくとも１
種の流体である、請求項１、２、３または４記載の電気
粘性流体。[Claims] 1. An electrorheological fluid obtained by dispersing dispersed particles whose surface has been treated with a non-aqueous liquid in an electrically insulating fluid. 2. The electrorheological fluid according to claim 1, wherein the non-aqueous liquid comprises a polyhydric alcohol. 3. The electrorheological fluid according to claim 1 or 2, wherein the dispersed particles are cellulose. 4. The electrorheological fluid according to claim 1, 2 or 3, wherein the amount of the non-aqueous liquid adsorbed on the dispersed particles is 3% by weight or more based on the weight of the dispersed particles. 5. The electrically insulating fluid is at least one selected from silicone oil, vegetable oil, fluorine oil, diphenyl chloride, mineral oil, dibutyl sebacate, toluene, or benzene.
5. The electrorheological fluid of claim 1, 2, 3 or 4, which is a seed fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108281A JP2573994B2 (en) | 1988-04-30 | 1988-04-30 | Electrorheological fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63108281A JP2573994B2 (en) | 1988-04-30 | 1988-04-30 | Electrorheological fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01278598A true JPH01278598A (en) | 1989-11-08 |
| JP2573994B2 JP2573994B2 (en) | 1997-01-22 |
Family
ID=14480671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63108281A Expired - Lifetime JP2573994B2 (en) | 1988-04-30 | 1988-04-30 | Electrorheological fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2573994B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284595A (en) * | 1988-05-12 | 1989-11-15 | Tonen Corp | Electroviscous fluid excellent in high-temperature stability and response |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS646093A (en) * | 1987-06-29 | 1989-01-10 | Asahi Chemical Ind | Electrical viscous fluid |
-
1988
- 1988-04-30 JP JP63108281A patent/JP2573994B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS646093A (en) * | 1987-06-29 | 1989-01-10 | Asahi Chemical Ind | Electrical viscous fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284595A (en) * | 1988-05-12 | 1989-11-15 | Tonen Corp | Electroviscous fluid excellent in high-temperature stability and response |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2573994B2 (en) | 1997-01-22 |
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