Study on the Preparation of Zeolite Molecular Sieves--Mineral oil Electroviscous Fluids and Their Properlies

A series of electroviscous fluids with high effect had been prepared by dispersing zeolite molecular sieves into mineral oils. The eleetroviscosities of the fluids were found to be related to applied electric field intensities and the concentrations of dispersed phases, and accorded with the double electric layer induction direction model. The relationships of electroviscosities of the fluids to temperature and properties of the dispersing mediums were studied. The result sshowed that the electroviscosity of polite molecular sieves-mineral oil reduce quickly as the temperature was raised, and was related to dieledc constant, puncture voltage of the dispersing phase, and to type and ratio of the additive. The higher the dielectric constant of nonpolar medium was, the higher the electroviscosity of the fluid prepared with it, but not so for polar Inedium. The higher the puncture voltage of oil was, the higher the puncture voltage of the fluid prepared with it. The fluids prepared with dielectric oils with similar construction had similar electroviscosities. The fluids prepared with cyclic hydrocarbons had weaker electroviscosities than that prepared with chain hydrocarbons. The additions of small molecular alcohols or surface active agents made the electroviscosities reduce. Rheological analysis came to a conclusion that the electroviscosity was a kind of mutual action force among molecules at applied electric field.Energy conservation analysis came to a conclusion that the electroviscosity was a kind of transform of electric energy, and was a kind of intrinsic nature of all fluids.