3results about How to "Improve liquid absorption capacity" patented technology

The application discloses a kind of high expansion cellulose sponge with arch layer structure and its preparation method and application.The method is: with carboxymethyl cellulose and cellulose or its micro-nano fiber as raw material, crosslinking agent is added to prepare hydrogel.Subsequently, the sponge sample is obtained by two-way freezing of hydrogel-freeze drying, the sponge sample is soaked in the solution that can be reacted with carboxyl, the solution includes at least one of calcium chloride solution, chitosan solution or the mixed solution of two, finally, the sponge is obtained by secondary freeze-drying.The sponge of the application has good biocompatibility, high liquid absorption rate, and the volume expansion ratio can reach 10-15 times;after compression, it is used for bleeding site, can swell rapidly, block wound, and quickly stop bleeding.The sponge of the application has arch layer structure between layers, can realize high compression, and can provide expansion support force for more than 4 hours.The sponge prepared by the application can be used for deep bleeding, such as deep and narrow penetrating wound bleeding, human interface bleeding, etc.

The application discloses a lithium battery diaphragm with a warning function, which is a sandwich structure of three or more layers of nanofibers, and comprises a pure film and a conductive composite layer with a warning function in the middle. The application also includes adding functional materials to the lithium battery diaphragm with a warning function, so that the diaphragm has a composite function other than the warning function, for example, adding a flame-retardant coating to make the diaphragm have a flame-retardant function in addition to the warning function. The lithium battery diaphragm provided by the application not only has the characteristics of a natural three-dimensional nanometer network structure, good thermal stability, high liquid absorption rate, high ion conductivity and the like compared with traditional commercial polyolefin diaphragms, but also has unique warning and optional flame-retardant functions, which greatly ensures the safety of lithium batteries.