JPH01253110A - Electric viscous fluid - Google Patents
Electric viscous fluidInfo
- Publication number
- JPH01253110A JPH01253110A JP7973488A JP7973488A JPH01253110A JP H01253110 A JPH01253110 A JP H01253110A JP 7973488 A JP7973488 A JP 7973488A JP 7973488 A JP7973488 A JP 7973488A JP H01253110 A JPH01253110 A JP H01253110A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- dispersion
- organic liquid
- electric field
- conductivity
- 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 40
- 239000007788 liquid Substances 0.000 claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims abstract description 9
- 239000000741 silica gel Substances 0.000 claims abstract description 9
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 9
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims abstract description 8
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 23
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 235000019198 oils Nutrition 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 6
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 claims description 4
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 235000019000 fluorine Nutrition 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 12
- 239000006185 dispersion Substances 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010685 fatty oil Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- PTHCMJGKKRQCBF-UHFFFAOYSA-N Cellulose, microcrystalline Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC)C(CO)O1 PTHCMJGKKRQCBF-UHFFFAOYSA-N 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000654 additive Substances 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
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 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
- 238000000034 method Methods 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
- 238000002156 mixing Methods 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 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 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001408 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
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring 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が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.
［従来の技術］
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
。[Prior Art] A phenomenon in which the viscosity of a dispersion liquid in which solid particles are mixed and dispersed in a specific dispersion medium 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、セバシン酸ジブチル、シリコー
ンオイルなどの分散媒に、微結晶セルロース、シリ゛カ
ゲル、大豆カゼイン、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。Fluids exhibiting this Winslow effect include mixing dispersoids such as microcrystalline cellulose, silica gel, soybean casein, starch, and ion exchange resins with dispersion media such as diphenyl chloride, benzene chloride, dibutyl sebacate, and silicone oil.・Dispersed electrorheological fluids are known.
従来では、水を吸着させたシリカなどの分散質を用いる
ことが、良好な効果を示すものとして提案されてる（特
公昭４５−１００４８号公報および特開昭４８−１７８
０６号公報など）。Conventionally, the use of dispersoids such as silica adsorbed with water has been proposed as having good effects (Japanese Patent Publication No. 45-10048 and Japanese Unexamined Patent Publication No. 48-178).
Publication No. 06, etc.).
［発明が解決しようとする課題］
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、吸着した水分が遊離することに
より、ウィンズロ効果が急速に減少して消滅することが
多く、従って、耐熱性、耐久性に著しく劣り、機械的摩
耗性に弱かった。[Problems to be Solved by the Invention] However, in conventional electric fluids, the rate of viscosity change is small relative to the rate of change in electric field strength, so the Winslow effect does not appear conspicuously, and adsorbed water tends to be released. As a result, the Winslow effect rapidly decreases and disappears in many cases, resulting in significantly inferior heat resistance and durability, and weak mechanical abrasion.
この発明は、上記の背景に基づきなされたものであり、
その目的とするところは、耐熱性、耐久性および機械的
摩耗性に優れ、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 was made based on the above background,
The aim is to provide an electrorheological fluid that has excellent heat resistance, durability and mechanical abrasion resistance and exhibits a significant withro effect.
［課題を解決するための手段］
本発明者らは上記問題点を解決すべく種々の検討をした
結果、分散質として、導電度が１０’Ｓ／帥以上である
有機液体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。[Means for Solving the Problems] As a result of various studies in order to solve the above-mentioned problems, the present inventors have developed dispersion particles that adsorb organic liquids having a conductivity of 10'S/cm or more as dispersoids. The present inventors have found that the use of the above method is effective in achieving the object of the present invention, and have completed the present invention.
すなわち、この発明の電気粘性流体は、導電度が１０’
Ｓ／ａｍ以上である有機液体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 has a conductivity of 10'
It is characterized by dispersing dispersed particles whose surface has been treated with an organic liquid having a S/am or more in an electrically insulating fluid.
この発明の好ましい態様において、有機液体として、グ
リセリン、ホルムアミド、ベンジルアルコール、プロピ
レンカーボネート若しくはメチルホルムアミドから選ば
れた少なくとも１種の液体からなるものを使用すること
ができる。In a preferred embodiment of the present invention, the organic liquid may be at least one liquid selected from glycerin, formamide, benzyl alcohol, propylene carbonate, and methylformamide.
この発明の好ましい態様において、分散粒子としてシリ
カゲルを用いることができる。In a preferred embodiment of this invention, silica gel can be used as the dispersed particles.
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
ベンゼンから選ばれた少なくとも１種の絶縁性流体があ
る。In a preferred embodiment of the invention, the electrically insulating fluid is at least one insulating fluid selected from silicone oil, vegetable oil, fluorinated oil, diphenyl chloride, mineral oil, dibutyl sebacate, toluene, or benzene.
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、導電度が１Ｏ
Ｓ／印以上、好ましくは１０−６５／ｃｍ以上、より好
ましくは１０’Ｓ／ｃｍ以上である有機液体で表面処理
されたものである。Dispersed particles The dispersed particles used in this invention have an electrical conductivity of 1O.
The surface has been treated with an organic liquid having a density of S/cm or more, preferably 10-65/cm or more, more preferably 10'S/cm or more.
具体的に用いるものことができる有機液体として、メチ
ルホルムアミドやホルムアミドなどのアミド類、エチレ
ングリコール、グリセリン、ベンジルアルコールなどの
アルコール、その他プロピレンカーボネート、アセトニ
トリル、アセトアルデヒドなどがあり、また、導電性を
向上させるために、数種類の液体を混合したものがある
。Examples of organic liquids that can be specifically used include amides such as methylformamide and formamide, alcohols such as ethylene glycol, glycerin, and benzyl alcohol, and propylene carbonate, acetonitrile, and acetaldehyde. For this purpose, there are mixtures of several types of liquids.
この発明で用いることができる有機液体には、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。Organic liquids that can be used in this invention may contain additives such as salts to improve or adjust conductivity.
有機液体で表面処理される分散粒子は、例えば、０．１
〜５００μｍ１好ましくは１〜１００μｍの平均粒径を
持つものであり、その材質として、例えば、微結晶セル
ロース、シリカゲル、大豆カゼイン、デンプン、イオン
交換樹脂などがある。Dispersed particles whose surface is treated with an organic liquid may be, for example, 0.1
It has an average particle size of ~500 μm, preferably 1 to 100 μm, and its materials include, for example, microcrystalline cellulose, silica gel, soybean casein, starch, and ion exchange resin.
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 dispersed particle powder 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
、シリコーンオイル、フッ素オイルなどがあり、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があ
る。Electrically insulating fluids that can be used in this invention include, for example, resin oils, fatty oils, paraffinic hydrocarbons,
Examples include naphthenic hydrocarbons, olefinic hydrocarbons, chlorinated oils, silicone oils, fluorine oils, and preferred examples include silicone oils, vegetable oils, fluorine oils, diphenyl chloride, mineral oils, and dibutyl sebacate.
また、上記の絶縁油に加えて、トルエン、ベンゼンなど
の溶剤を用いることができ、更に、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 oil, a solvent such as toluene or benzene can be used, and furthermore, the above-mentioned liquids can be used in combination 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ができる。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１〜７０重量部、好ましくは、５〜５０重量部、
より好ましくは、１０〜２０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, 1 to 70 parts by weight of dispersed particle powder, preferably 5 to 50 parts by weight, per 100 parts by weight of electrically insulating fluid,
More preferably, the amount can be 10 to 20 parts by weight.
分散粒子の粉末の電気絶縁性流体への分散は、種々の方
法で実施することができる。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
目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, the electrically insulating fluid can contain various additives depending on the purpose.
［作 用］
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、次のように作用するもの
と考えられる。[Function] This invention having the above-mentioned technical configuration is thought to function as follows, although it is not necessarily theoretically clear.
第１図に示すように、分散粒子に吸着した有機液体の比
電導度と印加電界（Ｉ Ｋ Ｖ ／ ｍｔｓとＯＫＶ／
＋ｎ＋ｓ）の変化による粘度変化との関係を示すグラフ
に示すように、導電性のよい液体を使うほど効果が増す
ことが実験的に本発明者により見出だされている。この
発明において、導電度が１０−８５ ／ ｃ＋ｎ以上で
ある比較的高い導電性を有する有機液体で表面処理した
分散粒子が、電気絶縁性流体に分散されているので、分
散粒子に導電性が付与され、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。As shown in Figure 1, the specific conductivity of the organic liquid adsorbed on the dispersed particles and the applied electric field (I K V / mts and OK V /
As shown in the graph showing the relationship between the change in viscosity and the change in viscosity (+n+s), the inventor has experimentally found that the more conductive a liquid is, the more effective it is. In this invention, the dispersed particles are surface-treated with an organic liquid having a relatively high conductivity of 10-85/c+n or more, and are dispersed in an electrically insulating fluid, so that the dispersed particles are imparted with conductivity. The phenomenon in which the viscosity of the dispersion varies significantly due to an external electric field exhibits the so-called Winslow effect.
［発明の効果］ この発明により次の効果を得ることができる。[Effect of the invention] The following effects can be obtained by this invention.
請求項１による電気粘性流体では、分散質表面が導電性
の液体で処理されているので、外部電界によってその分
散液の粘性が著しく変動し、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, the surface of the dispersoid is treated with a conductive liquid, so that the viscosity of the dispersion varies significantly due to an external electric field, and the rate of change in electric field strength is significantly reduced compared to conventional water adsorption. In contrast, the rate of viscosity change is large.
吸着水の存在などの条件を必要とせず、導電性、沸点が
共に高い有機液体にすれば、従来の電気流体のように、
吸着した水分が遊離することにより、ウィンズロ効果が
急速に減少して消滅することがなく、耐熱性、耐久性に
著しく優れている。If conditions such as the presence of adsorbed water are not required, and an organic liquid with high conductivity and boiling point is used, it can be used like a conventional electrical fluid.
Due to the release of adsorbed moisture, the Winslow effect does not rapidly decrease and disappear, resulting in extremely excellent heat resistance and durability.
請求項２による電気粘性流体では、良好な導電性を有す
る有機液体が用いられるので、顕著なウィンズロ効果を
示す。In the electrorheological fluid according to the second aspect, since an organic liquid having good conductivity is used, a remarkable Winslow effect is exhibited.
請求項３による電気粘性流体では、分散質としてシリカ
ゲルが用いられるので、より良好な耐熱性を有する電気
粘性流体を得ることができる。In the electrorheological fluid according to the third aspect, since silica gel is used as the dispersoid, an electrorheological fluid having better heat resistance can be obtained.
請求項４による電気粘性流体により、高耐熱性、高耐電
圧性の利点がある。The electrorheological fluid according to claim 4 has the advantages of high heat resistance and high voltage resistance.
［実施例］ この発明を例を示して具体的に説明する。[Example] This invention will be specifically explained by showing an example.
実施例１
シリカゲル（和光純薬製、ワコーゲルＬＣ−５Ｈ）９０
．０重量部を１０５℃、１２時間以上乾燥して分散粒子
原料として調製した。また、導電性有機液体としてのＮ
−メチルホルムアミド（和光純薬製、特級）をメチルア
ルコール（和光純薬製、特級）で１００倍に希釈し、前
記の乾燥シリカゲルと混合し、５５℃でアルコールを除
去し、更に６０℃で水分を除去した。得られたシリカゲ
ルの分散粒子をシリコーンオイル（信越シリコーン製、
ＫＦ９６−１０ｃｓ）中に分散して粒子ニオイルの重量
比が１０：１の分散液を５分間タッチミキサーで撹拌し
て調製した。Example 1 Silica gel (Wako Pure Chemical Industries, Ltd., Wako Gel LC-5H) 90
．． 0 parts by weight was dried at 105° C. for 12 hours or more to prepare a raw material for dispersed particles. Also, N as a conductive organic liquid
- Methyl formamide (manufactured by Wako Pure Chemical Industries, Ltd., special grade) was diluted 100 times with methyl alcohol (manufactured by Wako Pure Chemical Industries, Ltd., special grade), mixed with the above-mentioned dry silica gel, the alcohol was removed at 55°C, and the moisture was further heated at 60°C. was removed. The obtained silica gel dispersed particles were mixed with silicone oil (manufactured by Shin-Etsu Silicone,
KF96-10cs) with a weight ratio of 10:1 to the particle size oil was prepared by stirring with a touch mixer for 5 minutes.
なお、分散粒子に対する有機液体の添加量は、１〜２０
重ｆｆｉ％であり、この例では、最も効果のあったもの
を記載した。Note that the amount of organic liquid added to the dispersed particles is 1 to 20
In this example, the most effective one is described.
得られたこの発明による電気粘性液体を、第２図に示す
測定装置を用いて、１０５℃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、得られた電気粘性
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がな
いことが分かる。The obtained electrorheological liquid according to the present invention was subjected to a heat resistance test at 105° C. using the measuring device shown in FIG. The results are shown in FIG. From this graph, it can be seen that the obtained electrorheological fluid exhibits a remarkable Winslow effect, and the characteristics of the electrorheological fluid do not deteriorate even when left under high temperature conditions.
比較例
有機液体で表面処理せず、水を空気中で吸着させたこと
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 an organic liquid and water was adsorbed in the air, and a heat resistance test was conducted.
その結果を第４図に示す。この結果から、５時間で劣化
し始めて耐熱性に劣ることが分かる。The results are shown in FIG. This result shows that it begins to deteriorate after 5 hours and is inferior in heat resistance.
実施例２〜４
第１表に示す有機液体を用いたこと以外、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。Examples 2 to 4 Electrorheological liquids were prepared in the same manner as in Example 1, except that the organic liquids shown in Table 1 were used, and a heat resistance test was conducted.
第１図は、分散粒子に吸着した有機液体の比電導度と印
加電界（ＩＫＶ／ｍｉとＯＫＶ／止）の変化による粘度
変化との関係を示すグラフ、第２図は実施例で用いた測
定装置の概略図、第３図は実施例°１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、第４図は比較例
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。
出願人代理人 佐 藤 −雄
１゜−１０ＴＯ’ＩＯ’ＩＯ’ １０’ ＩＱ’ １０
’ＩＯ’ １０’吸着しな有式液体の比電導度（Ｓ
−ｏｘ ）第１図
第２図Figure 1 is a graph showing the relationship between the specific conductivity of the organic liquid adsorbed on dispersed particles and the viscosity change due to changes in the applied electric field (IKV/mi and OKV/stop), and Figure 2 is the measurement used in the example. A schematic diagram of the apparatus, Fig. 3 is a graph showing the results of the heat resistance test of the electrorheological liquid obtained in Example 1, and Fig. 4 is a graph showing the results of the heat resistance test of the electrorheological liquid obtained in the comparative example. It is. Applicant's representative Sato -Yu1゜-10TO'IO'IO'10'IQ' 10
'IO'10'Specific conductivity (S
-ox) Figure 1 Figure 2
Claims (4)
で表面処理した分散粒子を、電気絶縁性流体に分散して
なる電気粘性流体。1. An electrorheological fluid prepared by dispersing dispersed particles whose surface has been treated with an organic liquid having a conductivity of 10^-^8S/cm or more in an electrically insulating fluid.
アルコール、プロピレンカーボネート若しくはメチルホ
ルムアミドから選ばれた少なくとの１種の液体からなる
、請求項１記載の電気粘性流体。2. The electrorheological fluid according to claim 1, wherein the organic liquid comprises at least one liquid selected from glycerin, formamide, benzyl alcohol, propylene carbonate, and methylformamide.
載の電気粘性流体。3. The electrorheological fluid according to claim 1 or 2, wherein the dispersed particles are silica gel.
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１種
の流体である、請求項１、２または３記載の電気粘性流
体。4. The electrical insulating fluid according to claim 1, 2 or 3, wherein the electrically insulating fluid is at least one fluid selected from silicone oil, vegetable oil, fluorine oil, diphenyl chloride, mineral oil, dibutyl sebacate, toluene, or benzene. viscous fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63079734A JP2625488B2 (en) | 1988-03-31 | 1988-03-31 | Electrorheological fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63079734A JP2625488B2 (en) | 1988-03-31 | 1988-03-31 | Electrorheological fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01253110A true JPH01253110A (en) | 1989-10-09 |
| JP2625488B2 JP2625488B2 (en) | 1997-07-02 |
Family
ID=13698438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63079734A Expired - Lifetime JP2625488B2 (en) | 1988-03-31 | 1988-03-31 | Electrorheological fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2625488B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075023A (en) * | 1988-12-17 | 1991-12-24 | Bridgestone Corporation | Electroviscous fluid |
| US5122293A (en) * | 1991-04-15 | 1992-06-16 | General Motors Corporation | Method of activating and deactivating an electrorheological response at constant alternating current |
| US5252240A (en) * | 1991-04-15 | 1993-10-12 | General Motors Corporation | Electrorheological fluids including alkyl benzoates |
| US5252239A (en) * | 1991-04-15 | 1993-10-12 | General Motors Corporation | ER fluids having chemically defoliated vermiculite treated with an alkyl ammonium halide and methods of making and using the same |
| US5279754A (en) * | 1991-04-15 | 1994-01-18 | General Motors Corporation | Electrorheological fluids having polypropylene carbonate adsorbed on the solid phase |
| US5603861A (en) * | 1993-09-28 | 1997-02-18 | Tonen Corporation | Electroviscous fluid mixed with esterified silica fine particles and polyhydric alcohol |
| US5843331A (en) * | 1995-11-13 | 1998-12-01 | The Lubrizol Corporation | Polymeric materials to self-regulate the level of polar activators in electrorheological fluids |
| US6065572A (en) * | 1995-11-13 | 2000-05-23 | The Lubrizol Corporation | Polymeric materials to self-regulate the level of polar activators in electrorheological fluids |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61216202A (en) * | 1985-02-06 | 1986-09-25 | ブリティッシュ・テクノロジー・グループ・リミテッド | Electrorheology fluid |
-
1988
- 1988-03-31 JP JP63079734A patent/JP2625488B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61216202A (en) * | 1985-02-06 | 1986-09-25 | ブリティッシュ・テクノロジー・グループ・リミテッド | Electrorheology fluid |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5075023A (en) * | 1988-12-17 | 1991-12-24 | Bridgestone Corporation | Electroviscous fluid |
| US5122293A (en) * | 1991-04-15 | 1992-06-16 | General Motors Corporation | Method of activating and deactivating an electrorheological response at constant alternating current |
| US5252240A (en) * | 1991-04-15 | 1993-10-12 | General Motors Corporation | Electrorheological fluids including alkyl benzoates |
| US5252239A (en) * | 1991-04-15 | 1993-10-12 | General Motors Corporation | ER fluids having chemically defoliated vermiculite treated with an alkyl ammonium halide and methods of making and using the same |
| US5279754A (en) * | 1991-04-15 | 1994-01-18 | General Motors Corporation | Electrorheological fluids having polypropylene carbonate adsorbed on the solid phase |
| US5603861A (en) * | 1993-09-28 | 1997-02-18 | Tonen Corporation | Electroviscous fluid mixed with esterified silica fine particles and polyhydric alcohol |
| US5843331A (en) * | 1995-11-13 | 1998-12-01 | The Lubrizol Corporation | Polymeric materials to self-regulate the level of polar activators in electrorheological fluids |
| US6065572A (en) * | 1995-11-13 | 2000-05-23 | The Lubrizol Corporation | Polymeric materials to self-regulate the level of polar activators in electrorheological fluids |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2625488B2 (en) | 1997-07-02 |
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