32 results about "Polyelectrolyte brushes" patented technology

The invention relates a magnetic particles preparation method by using nanometer spherical polyelectrolyte brush as micro-reactor, comprising the following four steps: step 1, obtaining 80-200nm of polymer microspheres by miniemulsion polymerization method; step 2, adding a photoinitiator in the final phase of miniemulsion polymerization to coat the surface of polymer microspheres and form a photoinitiator layer; step 3, initiating polyelectrolyte monomer polymerization with a ultraviolet lamp in a light reactor to obtain 100-350nm of spherical polyelectrolyte brush; step 4, adding ferrous salt and ferric salt in the spherical polyelectrolyte brush emulsion system to react in situ and prepare magnetic particles under the action of coprecipitator and finally obtaining 3-5nm of magnetic nanoparticles evenly distributed inside the spherical polyelectrolyte brush. The nanometer magnetic composite microspheres can have wide application in the fields of high effective catalyst, water purification, biomedicine and the like.

The invention provides a preparation method of a proton conductor based on a grafted titanium dioxide nanotube polyelectrolyte brush. The method comprises the following steps: 1) adding a TiO2 nano tube to a reaction container, adding triethylamine to the reaction container, adding an azo initiator solution under protection of N2, agitating under the condition at room temperature, and then transferring the reacted product to a centrifuge tube, washing, finally baking the lower layer of sediments in the centrifuge tube after transferring, and taking the dried product as an initiator to anchor the product on the surface of the TiO2 nano tube; 2) adding the TiO2 nano tube-initiator product to the reaction container, then adding an electrolyte monomer containing carbon-carbon double bonds, removing the inside air by adopting a mode of freezing-unfreezing for a plurality of times in cycle, carrying out radical polymerization on a mixed solution from which the air is removed, and carrying out post-treatment on the reacted product, so as to obtain the final product. The polyelectrolyte brush has more ion groups in the unit volume, is good in water-retaining property of a membrane, and shows high proton conductivity at low humidity.