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 belongs to the technical field of environmental catalysis, and discloses a method for constructing a photo-assisted fuel cell by using electrocatalyst nickel oxide and application thereof in pollutant bisphenol A degradation. The method comprises the following steps: using a CdS / TiO2 / ITO modified indium tin oxide as a positive electrode, using NiOx / ITO as a negative electrode, and realizing catalytic degradation of bisphenol A(BPA) by constructing a bisphenol A-sodium hypochlorite fuel cell; and simultaneously, optical energy and chemical energy are converted into electrical energy, so that the performance of the cell is improved. According to the method for constructing the photo-assisted fuel cell by using electrocatalyst nickel oxide and application thereof in pollutant bisphenol A degradation, the method is simple in operation, environmentally-friendly and safe, and the cell realizes the degradation and conversion of bisphenol A into CO2 under the driving of visible light.

The invention discloses a graphene coated lead composite material and a preparation method thereof as well as a lead-acid battery. The graphene coated lead composite material comprises lead particles and a graphene layer covering the lead particles; the graphene layer is further doped with carbonate and stannous sulfate, and the mass ratio of carbonate to stannous sulfate to graphene in the graphene layer is (1-4):(0.01-0.06):1. The preparation method of the graphene coated lead composite material comprises the steps of preparing a precursor mixture of the graphene coated lead composite material and performing solvothermal reaction treatment on the mixture. The anode and the cathode of the lead-acid battery contain the graphene coated lead composite material. The graphene coated lead composite material is high in structural stability, electrical conductivity and capacitive performance; the preparation method of the graphene coated lead composite material is capable of guaranteeing even size distribution, and also is high in operability and environmentally friendly, and consequently, enlarged production can be realized. The lead-acid battery is excellent in specific capacity, charge-discharge performance and charge-discharge cycle performance, and long in service life.

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.