JP2012111932A - ニュートン流体特性を有する電気粘性流体 - Google Patents
ニュートン流体特性を有する電気粘性流体 Download PDFInfo
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Abstract
【解決手段】本発明の一態様による電気粘性流体は、分極性粒子と分散媒とを含む。分極性粒子は、シリカ粒子に基づいて形成される。分散媒は、シリコンオイルを含みうる。シリコンオイルは、水酸基(hydroxyl group、−OH group)、アミノ基(amino group、−NH2 group)、メルカプト基(mercaptogroup、−SH group)、及びカルボキシ基(carboxy group、−COOH group)のうち少なくとも何れか一つを含む変性シリコンオイルになりうる。
【選択図】なし
Description
蒸留水にシリカ粒子(Sunsil−20、先進化学)を入れて約1時間機械的に撹拌して懸濁液を作る。そして、この懸濁液に4gのウレア(urea、Aldrich)を添加し、常温で16時間機械的に撹拌する。引き続き、遠心分離機を通じて懸濁液から蒸留水成分を分離し、80℃の真空オーブンで24時間乾燥して、白色の分極性粒子(例えば、図1の101)を得る。
作られた分極性粒子をシリコンオイル(X−22−170DX、Shinetsu)に13体積%で分散させて電気粘性流体を製造する。X−22−170DXシリコンオイルは、図2Aの分子構造を有するシリコンオイルに、水酸基を含むシリコンオイルを指称する。
作られた分極性粒子をシリコンオイル(KF−96、Shinetsu)に13体積%で分散させて電気粘性流体を製造する。KF−96シリコンオイルは、水酸基を有さない純粋なシリコンオイルを指称する。
水酸基を一つ以上含んだシリコンオイルを2種以上混合するか、1種の水酸基を含んだシリコンオイルと2種以上の他の絶縁性流体またはオイルとを混合して分散媒を作る。例えば、数式1のようなローレンツ−ローレンツの公式を用いて相対的に低い屈折率を有する水酸基を含んだシリコンオイル(X−22−170DX、nD=1.406、Shinetsu)と相対的に高い屈折率を有するシリコンオイル(PDS−1615、nD=1.473、Gelest)とを適量混合して、多様な屈折率を有する分散媒を製造することが可能である。
Claims (13)
- シリカ粒子に基づいて形成された分極性粒子と、
前記分極性粒子が分散され、水酸基(hydroxyl group、−OH group)、アミノ基(amino group、−NH2 group)、メルカプト基(mercapto group、−SH group)、及びカルボキシ基(carboxygroup、−COOH group)のうち少なくとも何れか一つを有するシリコンオイルを含む分散媒と、
を含むことを特徴とする電気粘性流体。 - 前記分散媒は、
水酸基(hydroxyl group、−OH group)、アミノ基(aminogroup、−NH2 group)、メルカプト基(mercapto group、−SH group)、及びカルボキシ基(carboxy group、−COOH group)のうち少なくとも何れか一つが、有機基と共に、または有機基なしに純粋なシリコンオイル分子の末端または側端に結合されて形成されるシリコンオイルを含むことを特徴とする請求項1に記載の電気粘性流体。 - 前記水酸基(hydroxyl group、−OH group)は、
前記有機基と共にカルビノール官能基(carbinol functional group)を形成することを特徴とする請求項2に記載の電気粘性流体。 - 前記水酸基(hydroxyl group、−OH group)は、
前記有機基なしにシラノール官能基(silanol functional group)を形成することを特徴とする請求項2に記載の電気粘性流体。 - 前記分極性粒子は、
前記シリカ粒子及び前記シリカ粒子に物理的または化学的に結合される分極性有機物質を含むことを特徴とする請求項1に記載の電気粘性流体。 - 前記分極性有機物質は、
ウレア(Urea)、チオウレア(Thiourea)、メラミン(Melamine)、アクリルアミド(Acrylamide)及びこれらの組み合わせのうち少なくとも一つを含むことを特徴とする請求項5に記載の電気粘性流体。 - 前記分極性粒子の屈折率と前記分散媒の屈折率との差が、0.06以下であることを特徴とする請求項1に記載の電気粘性流体。
- シリカ粒子に基づいて形成された分極性粒子を形成する段階と、
水酸基(hydroxyl group、−OH group)、アミノ基(aminogroup、−NH2 group)、メルカプト基(mercapto group、−SH group)、及びカルボキシ基(carboxy group、−COOH group)のうち少なくとも何れか一つを有するシリコンオイルを有する分散媒を形成する段階と、
前記分極性粒子を前記分散媒に分散させる段階と、
を含むことを特徴とする電気粘性流体の製造方法。 - 前記分極性粒子を形成する段階は、
蒸留水にシリカ粒子を入れて撹拌して、第1懸濁液を作る段階と、
前記第1懸濁液に分極性有機物質を入れて撹拌して、第2懸濁液を作る段階と、
前記第2懸濁液から前記蒸留水を分離する段階と、
前記蒸留水が分離された第2懸濁液を乾燥して、前記分極性粒子を得る段階と、
を含むことを特徴とする請求項8に記載の電気粘性流体の製造方法。 - 前記分極性有機物質は、
ウレア、チオウレア、メラミン、アクリルアミド及びこれらの組み合わせのうち少なくとも一つを含むことを特徴とする請求項9に記載の電気粘性流体の製造方法。 - 前記分極性粒子をシリコンオイルに分散させる段階は、
相異なる屈折率を有する分散媒を多数個形成する段階と、
前記分極性粒子の屈折率に基づいて、前記分散媒のうちから前記分極性粒子との屈折率の差が、0.06以下である分散媒を選択する段階と、
を含むことを特徴とする請求項8に記載の電気粘性流体の製造方法。 - 第1電極と、
前記第1電極に対向する第2電極と、
前記第1電極と前記第2電極との間に形成される電気粘性流体と、を含み、
前記電気粘性流体は、
シリカ粒子に基づいて形成された分極性粒子と、
前記分極性粒子が分散され、水酸基(hydroxyl group、−OH group)、アミノ基(amino group、−NH2 group)、メルカプト基(mercapto group、−SH group)、及びカルボキシ基(carboxygroup、−COOH group)のうち少なくとも何れか一つを有するシリコンオイルを含む分散媒と、を含むことを特徴とする表示装置。 - 前記分極性粒子の屈折率と前記分散媒の屈折率との差が、0.06以下であることを特徴とする請求項12に記載の表示装置。
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JPH05140581A (ja) | 1991-11-18 | 1993-06-08 | Matsushita Electric Ind Co Ltd | 電気粘性流体及びその製造方法 |
FR2712600B1 (fr) * | 1993-11-18 | 1996-01-12 | Rhone Poulenc Chimie | Fluide électrorhéologique anhydre. |
JPH07226316A (ja) * | 1994-02-14 | 1995-08-22 | Toyohisa Fujita | 磁性エレクトロレオロジー流体及びその製造方法 |
JPH09176676A (ja) | 1995-12-26 | 1997-07-08 | Tonen Corp | 電気粘性流体 |
KR20010019614A (ko) * | 1999-08-28 | 2001-03-15 | 윤덕용 | 다상계 전기유변유체 |
US6852251B2 (en) | 2002-09-16 | 2005-02-08 | The Hong Kong University Of Science And Technology | Electrorheological fluids |
US6984343B1 (en) | 2004-06-28 | 2006-01-10 | China Patent Investment Limited | Fluid suspensions with electrorheological effect |
CN100564497C (zh) * | 2007-01-18 | 2009-12-02 | 武汉理工大学 | 二氧化硅-水性聚氨酯纳米复合物的电流变液的制备方法 |
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2010
- 2010-11-23 KR KR1020100117047A patent/KR20120055351A/ko not_active Application Discontinuation
-
2011
- 2011-05-27 US US13/117,519 patent/US8120840B1/en not_active Expired - Fee Related
- 2011-08-02 EP EP11176345.4A patent/EP2455444B1/en not_active Not-in-force
- 2011-09-01 JP JP2011190440A patent/JP2012111932A/ja active Pending
- 2011-11-14 CN CN2011103593984A patent/CN102559345A/zh active Pending
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JPS6144998A (ja) * | 1984-07-26 | 1986-03-04 | バイエル・アクチエンゲゼルシヤフト | 電気粘性液体 |
JPS6295397A (ja) * | 1985-10-17 | 1987-05-01 | バイエル・アクチエンゲゼルシヤフト | 電気粘性液体 |
JPH01304189A (ja) * | 1988-06-01 | 1989-12-07 | Bridgestone Corp | 電気粘性液体 |
JPH04348193A (ja) * | 1990-07-17 | 1992-12-03 | Shin Etsu Chem Co Ltd | 電気粘性流体組成物 |
JP2006065248A (ja) * | 2004-08-30 | 2006-03-09 | Tokai Univ | Er流体を用いた表示装置 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104099163A (zh) * | 2014-06-20 | 2014-10-15 | 中国兵器科学研究院宁波分院 | 一种巨电流变液的制备方法 |
Also Published As
Publication number | Publication date |
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KR20120055351A (ko) | 2012-05-31 |
US8120840B1 (en) | 2012-02-21 |
EP2455444A1 (en) | 2012-05-23 |
CN102559345A (zh) | 2012-07-11 |
EP2455444B1 (en) | 2014-10-22 |
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