Phase-change material suspension fluid composition including fumed silica particles and method for preparing the same

Patent metadata

Field	Value
Publication number	US-10059864-B2
Application number	US-201715664942-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Nov 7, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

Disclosed are a suspension fluid and a method for preparing the suspension fluid. Particularly, the suspension fluid is prepared by dispersing fumed silica particles in a solvent that includes one or more compounds selected from the group consisting of ethylene glycol and propylene glycol, and water. The phase-change suspension fluid obtained from the present invention is a shear thickening fluid that have a constant Newtonian behavior at a low rate of shear or a low frequency band, and further have a non-Newtonian behavior as a solid-like suspension at a high rate of shear or a high frequency band due to an increase in viscosity. In addition, the phase-change suspension fluid may reversibly change its phase with vibration of a vehicle, thereby providing advantages of both of the hydro bushes and the solid type bushes.

First claim

What is claimed is:

1. A method for preparing a phase-change suspension fluid, comprising:
(i) preparing a suspension fluid by adding and dispersing fumed silica particles in a solvent including one or more compounds selected from the group consisting of ethylene glycol and propylene glycol, and water;
(ii) sonicating the suspension fluid; and
(iii) removing air from the sonicated suspension fluid by placing the sonicated suspension fluid in a vacuum chamber.

2. The method of claim 1 , wherein the step of (ii) for sonicating the suspension fluid is performed for about 9 to 12 hours.

3. The method of claim 1 , wherein the step of (iii) for removing air is performed for about 9 to 12 hours.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Park Jong Min
• Seo Jae Sik
• Yang Kyung Mo
• Chang Dae Sung
• Choi Hyoung Jin

Classifications

• C10N2020/06

  Particles of special shape or size · CPC title

• B60G17/08

  Characteristics of fluid dampers (adjusting fluid dampers in general F16F9/44 - F16F9/53) · CPC title

• C10M177/00

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10M2207/0225

  used as base material · CPC title

• C09K3/00 Primary

  Materials not provided for elsewhere · CPC title