2results about How to "Uniform stomata" patented technology

This invention relates to the field of dialysis paper technology, and particularly to a fiber pretreatment method for dialysis paper and dialysis paper itself. The fiber pretreatment method for dialysis paper includes the following steps: Step 1, weighing softwood fibers, broadwood fibers, and regenerated fibers and placing them in deionized water, stirring thoroughly to obtain a mixture; Step 2, adding an initiator to the mixture, heating to 35-45°C, and mixing evenly; Step 3, adding modified nanoparticles to the mixture from Step 2, and stirring continuously for 4-6 hours; Step 4, after the reaction is complete, washing, filtering, and drying to obtain the pretreated fibers for dialysis paper. The fiber pretreatment method for dialysis paper proposed in this invention can uniformly attach nanoparticles to the fiber surface. When the nanoparticles are compressed by the fibers, they can aggregate towards the "gaps" between the fibers, preventing excessively large gaps between the fibers and avoiding the passage of bacteria or dust through the dialysis paper.

The application discloses a manganese-zinc ferrite and a preparation method thereof, and the method comprises the following steps: mixing manganese-zinc ferrite powder and a polyvinyl alcohol solution to obtain a mixture, and grinding the mixture; performing a compression molding treatment on the ground mixture to obtain a compression molding product; and performing a sintering treatment on the compression molding product to obtain the manganese-zinc ferrite; wherein the sintering treatment comprises a temperature rising treatment stage, and the temperature rising treatment stage comprises a plurality of temperature rising stages, at least two of which have different temperature rising rates. The manganese-zinc ferrite prepared by the application can have a high saturation magnetic flux density and a low residual magnetism while keeping a low loss at a high frequency, that is, the manganese-zinc ferrite with a large magnetic induction intensity change amount is prepared.