1results about How to "Fast magnetic response" patented technology

The application discloses a preparation method of amino magnetic beads, which comprises the following steps: coating a magnetic nanoparticle with a silicon shell to form a silicon magnetic bead; modifying the silicon magnetic bead to form a modified silicon magnetic bead; reacting the modified silicon magnetic bead with an organic amine to form an aminated silicon magnetic bead; and performing a polymerization reaction on the aminated silicon magnetic bead to form the amino magnetic bead. The application forms a dense polyamide polymer layer on the surface of the magnetic bead core through an amidation coating scheme, so as to optimize the structure of the polymer layer of the magnetic bead. The magnetic response speed of the prepared magnetic bead is relatively fast due to the relatively large proportion of the magnetic core part of the magnetic bead and the relatively large number of hydrophilic active groups and charges on the surface of the polymer layer. The prepared magnetic bead has excellent later modification extensibility due to the adjustable type of the active groups carried on the surface.