Ni/TiO2-based electromagnetic rheological liquid with electromagnetic coupling effect and preparation method thereof

• Main Authors: GUO HONGYAN, TAN SUOKUI, LU QINGGUO, JI SONG, QIAN KUNMING, WU MIN, ZHOU YUSONG
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2011
• Subjects: CHEMISTRY; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

The invention relates to Ni/TiO2-based electromagnetic rheological liquid with electromagnetic coupling effect and a preparation method thereof. The dispersed phases of the electromagnetic rheological liquid are composite particles which are respectively in a core-shell structure, wherein nano-metallic conductive particles (Ni) are taken as a core, titanium dioxide (TiO2) is taken as a coating shell, and the composite particles are modified by polar molecules. The preparation method comprises the following steps: preparing nano-nickel particles by using a physical method, wherein the particlediameter is 30-200nm; carrying out hydroxylation treatment on the nano-nickel particles to obtain particles A; coating TiO2 on the particles A to obtain particles B; carrying out heat treatment on the particles B to obtain Ni/TiO2 composite particles or coating urea and SDBS polar molecules at the outer layers of the particles B to obtain particles C; carrying out heat treatment on the particles C to obtain Ni/TiO2/Urea a