30results about How to "Free diffusion" patented technology

The invention relates to a graphene doped lithium iron phosphate positive electrode material and a preparation method thereof. The method comprises the following steps of: (1) mixing a soluble lithium compound, phosphate and a ferrous salt into a dispersing agent to obtain a dispersing solution a; (2) oxidizing a graphene derivative material to obtain an oxidized graphene derivative material, and performing ultrasonic dispersion to obtain a dispersing solution b; and (3) mixing the dispersing solution a and the dispersing solution b, stirring uniformly, spray-drying, and calcining to obtain the graphene doped lithium iron phosphate positive electrode material. A lithium iron secondary battery prepared from the graphene doped lithium iron phosphate positive electrode material has the advantages of high capacity, good circulating performance, large tap density, small internal resistance and long service life.

The invention discloses a rotating device for a mobile satellite antenna, which comprises an antenna frame, a base, a motor, a driving pulley and a driven pulley, the base is fixedly connected to the mobile carrier, the antenna frame is connected to the base in rotation, and the driving pulley is driven by the motor. The shafts are coaxial and fixedly connected, the driven pulley is set coaxially with the central axis of the antenna frame and the two are fixed. The winding post is covered with a spiral cable, and the antenna frame is fixed with a winding fixing seat. One end of the spiral cable is fixed on the winding fixing seat, and the other end of the spiral cable is fixed on the winding post. the top of. The advantage is to prevent the limit device from being triggered when the mobile carrier turns around quickly and changes direction by 180°, and the phenomenon of star loss occurs. In addition, the coil of the helical cable can shrink and spread freely during the rotation of the antenna frame to prevent the cable from being twisted. broken.

The invention provides a dressing containing trehalose reparable skin barriers and a making process of the dressing. The dressing comprises the following raw materials in parts by weight of 55-100 parts of trehalose, 13-25 parts of hippophae rhamnoides fruit polysaccharide, 65-95 parts of glycerine, 32-46 parts of sweet almond oil, 13-20 parts of glusulase, 25-35 parts of pentadiol, 3.0-5.0 partsof phenoxyethanol, 2.3-3.5 parts of triethanolamine and 765-852 parts of water. According to the dressing prepared by a specific technology and limited technology parameters, the repair capacity of skin is improved, skin sensibility after laser therapy can be relaxed, and the repair time of damaged skin can be shortened.

The invention relates to a preparation method of an anti-ultraviolet aging polyphenylene benzodioxazole fiber, which comprises the following steps: adding raw materials into a prepolymerizer according to the mixing ratio, removing chlorine hydride gas at certain temperature, gradually increasing the temperature to 160-180 DEG C, carrying out reaction for 12-48h, then transferring into a twin-screw reactor for carrying out postpolymerization, obtaining PBO / PPA spinning solution which is in line with requirements, and quantitatively conveying into a spinning component by a metering pump; and extruding the PBO / PPA spinning solution by a spinneret plate at 150-200 DEG C, passing through an air gap layer of 50-300cm for stretching, then entering into a coagulation bath, passing through a washing process of 50-300m with warm water at about 30-50 DEG C after passing through the coagulation bath, drying at 70-110 DEG C, then winding at the speed of 50-200m, obtaining a PBO protofilament, continuously carrying out heat treatment at 550-650 DEG C and obtaining the high-modulus PBO fiber, wherein an anti-aging agent is added in coagulation bath solution in advance. The anti-ultraviolet agingpolyphenylene benzodioxazole fiber has the advantages that the anti-aging agent is closed and retained in the fiber, thereby giving the durable anti-aging property to the fiber; and the process is simple and applicable to the industrial operation.

The invention relates to a composite film electrode and a preparation method thereof. The electrode is a graded porous nano composite film which is composed of an insulating substrate, a first binding layer, a conductive gold layer, a second binding layer and a modified aluminum layer, wherein small holes with a hole diameter of 2-20 nm are uniformly distributed on the conductive gold layer according to a distribution density of 1010 / cm2-1012 / cm2, and the small holes with the hole diameter of 20-400 nm are uniformly distributed on the second binding layer and the modified material layer according to the distribution density of 109 / cm2-1012 / cm2; and the preparation method of the electrode comprises the following steps of: firstly, preparing a multi-layer composite film on the insulating substrate, then, performing anodizing and hole enlargement on the multi-layer composite film to implement that an aluminum layer becomes a porous alumina layer, a gold layer becomes a nano porous structure, the second binding layer becomes a porous oxide of tantalum, niobium or titanium, and cleaning and drying the multi-layer composite film to get a finished product of the graded porous nano alumina / gold composite film electrode. The graded porous nano alumina / gold composite film electrode has high in electroanalytical activity and the dual advantages of a nano porous gold and a porous anodizedaluminum; and the preparation method is simple and reliable, solves the defect of inconvenience in operation caused by high brittleness of an AAO, and fits for mass production.

The invention discloses a method for efficiently removing phosphorus in nutrient-rich water bodies. Specifically, cement and bentonite are used as phosphorus removal agents, and the mass ratio is 80% of cement and 20% of bentonite. The addition amount of the above-mentioned phosphorus removal agent in the water body to be treated is 0.025%-0.2% in parts by mass. The above phosphorus removal agent is added to the water body to be treated, mixed, reacted, and left to stand, and the treatment of the water body can be completed. The dephosphorization agent of the present invention is in powder form and can be directly added into the water body. After being added, it can be evenly dispersed in water and reacted with water. Therefore, the present invention does not need to add other special facilities and equipment, and the dephosphorization operation is simple and convenient. The cost of the phosphorus removal agent used in the method of the invention is lower than that of the conventional phosphorus removal agent currently used in the market, and the raw materials are easy to obtain and easy to realize industrialization. After being treated by the method, the total phosphorus in the water body can quickly reach the relevant standard.

The present invention relates to a method for glass fusion. The method includes the following steps: laminating the glass; microwave processing the glass after the lamination processing; and welding the glass after the microwave processing. First, the glass is laminated to enhance the surface interface activity of the glass and promote the bonding between the glass interfaces; then the laminated glass is subjected to microwave treatment, the microwave penetrates into the glass, and the interaction between the microwave and the glass generates friction. It causes the temperature of the glass to rise, so that the inside and outside of the glass are heated and heated almost at the same time, forming a body heat source state, and the heating inside and outside the material is uniform; no additional pressure is required, and the glass interface will diffuse freely during the microwave treatment process, thus achieving tightness between the glasses. At the same time, the high temperature generated by the microwave can make the interface group of the glass group have a weak connection. After high temperature welding, the silicon-oxygen bond between the glasses can be promoted, and the tight connection of the glass sheets can be realized. Effect.

The invention relates to a filter screen, a preparation method of the filter screen and a filter device using the filter screen, wherein the filter screen includes a collection base cloth and a nanofiber layer using the collection base cloth as a base, and the nanofiber layer is obtained by electrospinning Positively charged nanofibrous structures prepared by the silk method. The filter screen of the present invention adopts a nanofiber structure, has the advantages of high specific surface area and high porosity, and can significantly enhance the interception effect on tiny particles.