37results about How to "Good degradability" patented technology

The invention belongs to the field of environment sewage treatment, and particularly relates to a preparation method of an ozone oxidation catalyst for removing organic matters and total nitrogen in water. Mesoporous alumina is used as a carrier; metallic oxides are doped and loaded onto the surface of the carrier of alumina and an inside pore passage structure; a prepared catalytic material is porous; the specific surface area is large; the adsorption performance is high; certain mechanical strength and physicochemical stability are realized; a novel ozone oxidation catalyst is obtained; ozone molecules are adsorbed at the pore passage at the catalyst surface and are in full contact with active ingredients and contaminants; the utilization efficiency of ozone molecules is greatly improved; the ozone reaction speed is improved; the organic matters and total nitrogen in industrial wastewater can be effectively removed.

The invention relates to a method for preparing a degradable polymer sacculus. The method comprises the following concrete steps of: dissolving a biodegradable polymer into an organic solvent for being prepared to be 1-30 percent by mass; adopting an electrostatic spinning method and controlling the spray rate to 0.1-2.0mL/h and the voltage to 3,000-30,000V, wherein the distance between a spray opening of an ejector and a receiving device is 1-20mm, and the rotating speed of the receiving device is 1-100rpm; and collecting a sprayed filament to obtain a degradable polymer sacculus. The sacculus is a biodegradable macromolecule sacculus with favorable mechanical performance, large degradable and mechanical strength and favorable flexibility. The prepared sacculus can bear 6-12 atmospheric pressures and ensure that the compressed centrum height is increased and even completely restored. The degradation mass of the degradable polymer sacculus in two weeks in serum is 10-20 percent (w/w). The method solves the problems of bone cement collapse, leakage and the like, not only overcomes the defects of PVP (Polyvinyl Pyrrolidone) and PKP (Penetrating Keratoplasty) but also expands the application range of operation. The method disclosed by the invention has simple preparation process.