| 摘要 |
PURPOSE:To provide a functional fluid capable of increasing an apparent viscosity when subjected to an electric field by treating a flat flaky laminar inorganic substance with an aqueous solution of an alkylamine to substitute a specified amount of interlaminar cations by the alkylamine and dispersing the treated substance in an insulating oil. CONSTITUTION:A flat flaky laminar inorganic substance (e.g., montmorillonite or sodium teniolite) is treated with an aqueous solution of an alkylamine (e.g., dodecylammonium chloride) to substitute about 20-80% of interlaminar cations by the alkylamine. The treated substance is dispersed in an insulating oil to give a functional fluid. When an electric field voltage is applied to this functional fluid under a certain shear force, the viscosity will increase due to bringing of absorbed water; while when an electric field is removed, the bridging will disappear, resulting in a decrease in viscosity. Therefore, this functional fluid can be applied to a viscous clutch, etc. |
