Method for differentially separating nanometer copper powder with different particle sizes

The invention relates to a method for differential separation of nanometer copper powder. The method comprises the following steps of mixing nanometer copper powder to be separated with a first dispersing agent to obtain a mixed solution; carrying out centrifugal separation on the mixed solution to obtain a first precipitate and first supernatant liquid; going on to carry out centrifugal separation on the first supernatant liquid to obtain a second precipitate and second supernatant liquid, and repeating the step for N-2 times to obtain an Nth precipitate and Nth supernatant liquid; and respectively mixing the first precipitate to the Nth precipitate with a second dispersing agent, and carrying out centrifugal separation to obtain first solid to Nth solid correspondingly. The method has the advantages of being simple, convenient to carry out, economical, good in separation effect, low in copper powder loss and environmentally friendly. 本发明涉及一种差速分离纳米铜粉的方法，包括：将待分离的纳米铜粉与第一分散剂进行混合，得到混合液；对混合液进行离心分离，得到第1沉淀物和第1上层液体；