| 摘要 |
PURPOSE: Provided is a preparation method of metal colloid, nanometer size metal particles, having good stability, homogeneous shape and narrow particle size distribution by using one or more of (1-vinyl pyrrolidone) acrylic copolymer, polyoxyethylene stearate, and (1-vinyl pyrrolidone)-vinyl acetic acid copolymer as a stabilizer. CONSTITUTION: The metal colloid is prepared by the following steps of: dissolving metal salts or metal oxide salts, and at least one polymer stabilizer selected from the group consisting of (1-vinyl pyrrolidone) acrylic copolymer, polyoxyethylene stearate, and (1-vinyl pyrrolidone)-vinyl acetic acid copolymer into water or nonaqueous solvents; purging the solution with N2 gas; and radiating gamma rays. The metal salts are one containing Ag, Cu, Ni, Pd or Pt, and the metal oxide salts are TiO2-contained salts, wherein AgNO3, AgClO4, Ag2SO4 or CH3COOAg is used as Ag-source. The nonaqueous solvents are one or more of ethylene glycol, methanol and, iso-propyl alcohol. The prepared colloid particles, being 1-5nm in size, are used for sterilizer, deodorizer, conductive adhesive, conductive ink, etc.
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