Abstract: Provided is a positive electrode sheet and a preparation method thereof. The positive electrode sheet includes a current collector and a positive electrode material layer. The positive electrode material layer is coated on the current collector and includes a Prussian blue-type material containing crystal water, a conductive agent, a binder, and a gelatinous non-aqueous electrolyte. The positive electrode material layer has characteristics satisfying 0.1?R2*(M1+M4)/((M2+M3)*R1)?9, wherein the M1 represents a thermogravimetric loss rate of the Prussian blue-type material at 200° C.˜400° C.

Abstract: An artificial respiration apparatus for first aid is provided, and relates to the field of medical first-aid supplies. The artificial respiration apparatus comprises an adhesive film, wherein a fixing block is provided on an upper end of the adhesive film; a first adhesive strip is provided on a lower end of the adhesive film; a second adhesive strip is also provided on the lower end of the adhesive film; and a blowing device is inserted in the fixing block. An intraoral ventilation pipe is inserted into the mouth of a person to be rescued, then the adhesive film is applied to the mouth and nose of the person to be rescued, and finally air is blown into a blowing port such that the blown air enters the body of the person to be rescued through a ventilation pipe, and the intraoral ventilation pipe.

Abstract: The present application relates to the technical field of wastewater treatment and rapid pollutant detection, in particular to a chitosan-polyacrylamide composite porous hydrogel, preparation and use thereof, and a metal ion-adsorbing and detecting reagent and method. The chitosan-polyacrylamide composite porous hydrogel of the present application is prepared by in situ polymerization of a chitosan sol, an acrylamide, a crosslinking agent and a surfactant into a mixed solution comprising liquid droplets, followed by steps of curing, washing, and freeze-drying. The present application further provides a metal ion-detecting reagent, which is obtained by adsorbing a color developing agent into the chitosan-polyacrylamide composite porous hydrogel as described above, wherein the color developing agent is a dye that changes color when encountering metal ions. The chitosan-polyacrylamide composite porous hydrogel of the present application has balanced mechanical properties and porosity.