Water-based magnetic liquid of surface group rich, high stability and its preparation method

A high-stability, magnetic liquid technology, applied in the direction of magnetic liquid, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of less surface active groups, small surface polymer adsorption, drug loading limit, etc. Achieve the effect of good stability and dispersion, rich active groups, and increased drug loading
CN1913055AInactive Publication Date: 2007-02-14GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Publication Date
2007-02-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a stabilized water-base magnetic solution and its preparation method in rich surface active group with controllable number, in which, the solution includes: nano-magnetic Fe3O4 particles, stabilizer and water applying polyamide-base amine branch like polymer as the stabilizer, the polymer and modified nano-magnetic Fe3O4 particles are scattered in water forming a stable collide solution. The preparation method includes: 1, confecting nano-Fe3O4 sol, 2, surface-modifying the Fe3O4 particles and scattering them in water.
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Description

technical field

[0001] The invention relates to a water-based magnetic liquid, in particular to a water-based magnetic liquid with abundant surface groups and high stability and a preparation method thereof. technical background

[0002] The so-called water-based magnetic liquid refers to a stable colloidal system formed by highly dispersed nano-magnetic particles adsorbed with stabilizers in water, mainly composed of nano-magnetic particles, stabilizers and water. Water-based magnetic liquids can be widely used in biomedical fields such as magnetically targeted drug delivery systems and intracellular magnetic liquid hyperthermia. The current water-based magnetic liquid can be divided into three categories according to the type of stabilizer used: 1. Use water-soluble small organic molecules such as amino acids, citric acid, folic acid, etc. as chelating agents and stabilizers; 2. Use surface Active agents form a double-layer adsorption mode on the surface of nano-magnetic ...

Claims

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