47results about How to "Structural properties are stable" patented technology

The invention discloses a method for preparing a high-performance nanofiltration composite membrane by constructing a ZIF-8 intermediate layer. The method comprises: 1) preparing a ZIF-8 intermediate layer on a porous base membrane through a water / oil interface synthesis method; 2) preparing a polyamide separation layer on the ZIF-8 layer through an interfacial polymerization method. The ZIF-8 intermediate layer prepared by the water / oil interface synthesis method has the characteristics of uniform structure, small thickness and low agglomeration; 2+ A certain concentration of sodium polystyrene sulfonate is added to the water phase to effectively stabilize the ZIF-8 formation interface, thereby obtaining a ZIF-8 intermediate layer with continuous and uniform structural properties. The polyamide separation layer formed on this basis has a small thickness and no defects, so the prepared nanofiltration membrane has high flux and effective dianion and dye retention capacity. In the present invention, the water / oil interface synthesis process used to construct the ZIF-8 intermediate layer is similar to the interface polymerization process used to prepare the polyamide layer, which is convenient to improve on the basis of the traditional polyamide nanofiltration composite membrane preparation process. Scale up preparative production.

The invention discloses a lithium seawater battery and a preparation method thereof. The lithium seawater battery comprises a lithium protected negative electrode. The lithium protected negative electrode is made of a lithium sheet, a diaphragm, and a lithium ion solid electrolyte sheet sealed in an aluminum-plastic packaging bag. There is an electrolyte, and there is a window on the aluminum-plastic packaging bag. The lithium-ion solid electrolyte sheet seals the window on the aluminum-plastic packaging bag through the packaging glue. The packaging glue is high-density polyethylene ear glue or high-density polyethylene / polypropylene composite Pole ear gel. The preparation method comprises the preparation of a lithium ion solid electrolyte sheet pasted with encapsulation glue, the preparation of a lithium-protected negative electrode and battery assembly. The lithium seawater battery of the present invention has the advantages of good sealing performance, excellent discharge stability, long discharge time, and high energy density. It can work stably for more than 20 days in simulated seawater, and its energy density can exceed 600Wh / kg. The preparation method has a packaging process The advantages of simplicity, precise and controllable process.

The invention relates to the technical field of foaming materials and provides a halogen-free and environment-friendly EPDM (Ethylene-Propylene-Diene Monomer) rubber / negative oxygen ion powder mixed closed-cell secondary foaming material and a preparation method thereof. Negative oxygen ion powder of the halogen-free and environment-friendly EPDM rubber / negative oxygen ion powder mixed closed-cell secondary foaming material can be effectively combined with halogen-free and environment-friendly EPDM rubber under the condition that high biological activity of the negative oxygen ion powder is maintained, the dispersity of the negative oxygen ion powder on rubber molecules is effectively improved, original excellent physical properties of the rubber can be effectively reserved, enough negative oxygen ions can be released effectively and sufficiently, a product prepared from the secondary foaming material can continuously release 1,500 negative oxygen ions in each cubic centimeter of space in a static state, can improve ambient air quality and benefits human health; the preparation method of the halogen-free and environment-friendly EPDM rubber / negative oxygen ion powder mixed closed-cell secondary foaming material is simple to operate, easy to implement and suitable for large-scale production.