Nano high-molecular microsphere with conductivity and magnetism and its preparation method
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- 中国科学院成都有机化学研究所
- Publication Date
- 2004-07-28
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
Technical field
[0001] The invention relates to the field of functional materials, in particular to a magnetic polymer nano-microsphere and a preparation method thereof. Background technique
[0002] At present, the preparation of magnetic microspheres mainly includes embedding method and monomer polymerization method. The embedding method is to disperse magnetic particles in a polymer solution, and obtain magnetic polymer microspheres by atomization, flocculation, deposition, evaporation and other means. As described in patents US 4 495 393,1987 and US 4 672 040,1987. The preparation of magnetic microspheres by embedding method is simple, but the obtained particles have a wide particle size distribution, irregular shape, difficult to control the particle size, and some impurities such as emulsifiers are mixed in the shell. The monomer polymerization method is to add initiators, stabilizers, etc. to polymerize core / shell magnetic polymer microspheres in the presence of mag...