31results about How to "Reduce the probability of reunion" patented technology

The invention discloses a sun-proof and heat-insulating coating for buildings and a preparation method thereof. The blend is obtained by mixing water-based acrylic resin, modified silica airgel, zinc phosphate, organic fluorine epoxy resin and silicone resin , put the blend into the mixing tank, stir evenly and then filter, and mix the boric acid microparticles and inorganic fillers into the SiO 2 In the sol precursor, it fills the defects in the nonlinear optical crystal, and then regulates the infrared radiation performance, and undertakes the function of enhancing the infrared radiation performance of the atmospheric window band. Adding a dispersant makes the molecular chain of the dispersant fully stretch in the aqueous solution. In SiO 2 A surface adsorption layer of a certain thickness is formed on the surface of the airgel particles, which produces a steric hindrance effect, thereby achieving the promotion of the development of high-grade green buildings and the improvement of SiO 2 The purpose of dispersion stability of airgel system.

The invention relates to a polyimide composite material, a composite film and a preparation method thereof. Polyimide composite materials include polyimide, noble metal Au, Ag or Pt nanoparticles and TiO 2 nanotubes, noble metal nanoparticles grown in situ on the TiO 2 on the inner and outer walls of the nanotubes. Photoreduction process on TiO 2 In-situ growth of noble metal nanoparticles on the inner and outer walls of nanotubes, and then adding them to dianhydride and diamine precursors for in-situ polymerization to obtain polyimide precursor composite materials, and then imidization to obtain the described Polyimide composite material. On the upper and lower surfaces of the ordinary polyimide intermediate layer, the polyimide precursor composite material is coated at the same time, and then imidized to obtain a polyimide composite film. The polyimide composite film of the invention has obviously improved corona resistance while maintaining excellent mechanical properties.

The invention relates to the technical field of thermally conductive silicone rubber, in particular to a silicone rubber material with high thermal conductivity. The thermal conductivity of silicone rubber is the same as that of most polymers. The thermal conductivity is poor, and the thermal conductivity is only 0.2w / m·k. Graphene is simply dispersed into the silicone rubber material system. The compatibility of graphene and silicone rubber is not Too good, and the graphene particles are easy to agglomerate, which is very unfavorable for improving the thermal conductivity of silicone rubber. Based on the above problems, the present invention provides a silicone rubber material with high thermal conductivity, which uses a special titanate coupling agent to connect graphene and graphite to form a larger heat conduction network, and adds graphene or graphite and silicone rubber material The compatibility between them reduces the probability of agglomeration of graphene or graphite particles themselves. In the present invention, spherical alumina and tetrapod zinc oxide with different particle sizes are added to the silicone rubber system, and the thermally conductive fillers work synergistically. Greatly improved the thermal conductivity of the silicone rubber material.

The invention provides an industrial production method of N-ethylpyrrolidone, which belongs to the technical field of preparation of fine chemical products, and comprises the following steps: Step 1, adding γ-butyrolactone into a stirred tank, and a tube is welded on the stirrer, The catalyst is filled in the tube, and the solvent flows out through the holes on the tube and fully mixed with γ-butyrolactone; step 2, the material flowing out of the stirred tank is fully mixed with monoethylamine and then sent to the tube reactor, and the feeder has Atomizing nozzle, after the solvent is atomized, it is fully mixed with the material from the upper reaction section, collected, and evenly enters the tubes of the lower reaction section after passing through the distributor; step 3, the product flowing out of the tube-and-tube reactor is sent to the stirring In the jacket of the kettle, after exchanging heat with the material in step 1, it flows out from the outlet of the jacket and enters the refining stage. The invention solves the shortcomings of high reaction temperature, high reaction pressure, high equipment requirements and low environmental protection benefit existing in the existing N-ethylpyrrolidone production.

The invention relates to a method for extracting a nanometer second phase by using a non-aqueous solution electrolysis system and its application. The invention uses a unique design of the electrolysis system to make the electrolyte form overflow and eddy current during the electrolysis process, and the overflow and eddy current electrolyte continuously washes the electrodes and the electrolytic cell, which can effectively prevent the second nano-phase from forming in the electrode and the electrolytic cell. Surface adsorption and agglomeration of nanosecond phases. Through the design of electrolyte composition, especially the combined use of electrolyte, thickener and complexing agent, the selective electrolysis reaction of ferromagnetic alloy can be realized, the effective separation of matrix and second phase in ferromagnetic alloy can be realized, and the Fe 3+ Settling and covering on the surface of the second phase; effectively increasing the second phase settling resistance and inhibiting the second phase settling. The use of the electrolyte solution and electrolysis system is beneficial to improving the efficiency of the electrolysis reaction, improving the collection rate of the second phase with a size smaller than 20nm, especially smaller than 15nm, and realizing the extraction and characterization of the nanometer second phase in the ferromagnetic alloy.

The invention relates to the technical field of aluminum hydroxide manufacturing, and especially relates to a method for preparing non-metallurgical alumina by an electrolysis process. Reasonable control of the caustic-to-alumna molar ratio of a sodium aluminate solution and electrolysis, washing and microwave radiation treatments make the sodium oxide content of the prepared alumina greatly reduced to 0.1% or less, so the method has the advantages of low cost and high yield; the alumina product has a high purity and a high yield, and a byproduct sodium hydroxide is obtained, so the recyclingof the sodium hydroxide is achieved.

The invention provides an all-solid electrolyte, a preparation method thereof, and a lithium-ion battery. The all-solid electrolyte includes: a first functional layer, an intermediate functional layer, and a second functional layer. The first functional layer is arranged on the lower surface of the intermediate functional layer. The second functional layer is arranged on the upper surface of the intermediate functional layer; wherein, the intermediate functional layer includes a composite electrolyte layer and a modified layer filled inside the composite electrolyte layer and covers the entire upper and lower surfaces of the composite electrolyte layer. The composite electrolyte layer includes an inorganic electrolyte, a polymer substance, lithium salt; the first functional layer and the second functional layer include polymer and lithium salt. The all-solid electrolyte not only has good interfacial stability and interfacial compatibility, but also has high mechanical strength, can well cope with volume strain, reduces the risk of short circuit in battery preparation, and enhances the ability of the electrolyte to suppress lithium dendrites, so it can Effectively improve the cycle performance and charge and discharge capacity of lithium-ion batteries.

The invention relates to a graphene composite powder material, which comprises a graphene material and a micro-nano structure material attached to the surface of the graphene material. The micro-nano structure material is uniformly dispersed in the graphene material and composited with the graphene material through chemical bonds or physical effects. The graphene composite powder material has the advantages of better dispersibility and less agglomeration. The invention also relates to a preparation method of the graphene composite powder material.

The invention provides a device and method for rearranging and evenly distributing sand on super-hard material electroplated grinding wheel abrasives, which includes support plates and cover plates correspondingly arranged up and down, upper sand shafts are arranged between the support plates, and the upper sand shafts are fixed A grinding wheel base is provided, a sand cover is provided between the supporting plate and the cover plate, superhard abrasives are arranged between the sand covers, and the grinding wheel base is placed in the superhard abrasives. The invention can improve the consistency of the abrasive density, realize the quantitative addition of abrasives by specifying the amount of abrasives, ensure the consistency of the pressure in the jig each time the sand is applied, and realize the rotation and downward movement of the grinding wheel through the characteristics of thread matching, so that it will be close to the surface of the grinding wheel base The abrasives are rearranged to ensure the uniformity of abrasive distribution, and the consistency of the abrasive density of each grinding wheel is controlled under the premise that the total power remains unchanged. At the same time, the method can realize the success of one-time sanding, realize the single-time sanding requirement of the electroplated grinding wheel profile, eliminate the impact of sand filling on the plated size of the grinding wheel, and can effectively reduce the runout of the plated profile of the grinding wheel.