Title:
ELELCTRORHEOLOGICAL FLUID OF POLAR MOLECULE TYPE
Document Type and Number:
WIPO Patent Application WO/2007/147347
Kind Code:
A1
Abstract:
An electrorheological fluid of polar molecule type is mainly composed of a mixture
of solid dispersed particles and a fluid-dispersing agent. There are polar molecules
or groups on surfaces of the dispersed solid particles and/or the fluid-dispersing
agent. The polar molecules or groups have a molecular dipole of 0.5-10 Debey and
sizes of 0.1-8nm. The dispersed solid particles are spherical or spherical-like,
the size of which is 10-300nm and the dielectric constant of which is more than
50. Electrical conductivity of the fluid-dispersing agent is below 10-8S/m
and dielectric constant of the fluid-dispersing agent isbelow 10. The electrorheological
fluid has the following characters: high yield strength, high dynamic shear
intensity, low leakage current, linear relation between yield strength and
electric field intensity, and high yield strength under weak electric field
intensity. Yield strength of the fluid is nearly hundred times more than that
of traditional ER fluid and is up to more than 200KPa.
Inventors:
LU KUNQUAN (CN)
SHEN RONG (CN)
WANG XUEZHAO (CN)
SHEN RONG (CN)
WANG XUEZHAO (CN)
Application Number:
PCT/CN2007/001890
Publication Date:
December 27, 2007
Filing Date:
June 15, 2007
Export Citation:
Assignee:
CHINESE ACAD PHYSICS INST (CN)
LU KUNQUAN (CN)
SHEN RONG (CN)
WANG XUEZHAO (CN)
LU KUNQUAN (CN)
SHEN RONG (CN)
WANG XUEZHAO (CN)
International Classes:
C10M171/00
Foreign References:
| CN1752196A | 2006-03-29 | |||
| US20050285085A1 | 2005-12-29 | |||
| CN1768913A | 2006-05-10 | |||
| CN1490388A | 2004-04-21 | |||
| CN1752195A | 2006-03-29 | |||
| CN1190119A | 1998-08-12 | |||
| CN1454976A | 2003-11-12 | |||
| US5294360A | 1994-03-15 | |||
| CN1944606A | 2007-04-11 | |||
| CN1190119A | 1998-08-12 | |||
| CN1490388A | 2004-04-21 | |||
| CN1752195A | 2006-03-29 |
Other References:
WANG X. ET AL.: "The research on calcium titanate nanoparticle ER fluid", JOURNAL OF FUNCTIONAL MATERIALS, no. 5, 20 May 2006 (2006-05-20), pages 681 - 683, XP008101136
GONG X. ET AL.: "Organic chemical modification of nano tiania, barium titanate and their electrorheological effect", JOURNAL OF FUNCTIONAL MATERIALS, no. 5, 20 May 2006 (2006-05-20), pages 693 - 695, XP008101137
See also references of EP 2039743A4
GONG X. ET AL.: "Organic chemical modification of nano tiania, barium titanate and their electrorheological effect", JOURNAL OF FUNCTIONAL MATERIALS, no. 5, 20 May 2006 (2006-05-20), pages 693 - 695, XP008101137
See also references of EP 2039743A4
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (Bldg. B Tsinghua Tongfang Hi-Tech Plaza,No. 1, Wangzhuang Rd.,Haidian District, Beijing 3, CN)
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