37results about How to "There will be no reunion" patented technology

The invention relates to a preparation method of a low-percolation graphene/macromolecule electromagnetism shielding material. The composite material comprises the following main raw materials by weight percent: 94-99.7wt% of ultra-high molecular weight polyethylene (UHMWPE) and 0.3-6wt% of graphene oxide GONS. The preparation process comprises the following steps: (1) drying the raw materials; (2) preparing GONS/UHMWPE conductive particles; and (3) pressing and forming at high temperatures. According to the invention, the graphene oxide is reduced in situ at high temperatures in a hot pressing preparation process, so that the agglomeration of the graphene oxide in a chemical reduction process is avoided, the composite material has lower conductive percolation value, higher conductivity and higher electromagnetism shielding performance; and the preparation process is simple and low in production cost, the process is easy to master and mass production is easy to achieve.

The invention discloses a method for preparing nano Ag/polymer antimicrobial film by utilizing <60>Co-gama ray or electronic beam irradiation. The method comprises the steps of: dissolving an NVP (N-vinylpyrrolidone) monomer in one or any two of ethanol, methanol, water and acetone, then adding AgNO3 solution, evenly stirring, putting a polymer film into the mixed solution, vacuumizing, irradiating in a closed reaction container, taking out the polymer film, washing with water and drying to obtain the nano Ag/polymer antimicrobial film. No initiator or reductant needs to be added in the irradiation process, NVP is polymerized on the surface of the polymer when Ag<+> is reduced into nano Ag, the method has the advantages that the technology is simple, the process is controllable, the yield is high, the prepared nano Ag/polymer antimicrobial film has good hydrophilicity and safety, the antimicrobial rate to Escherichia coli 107CFU/ml in 24 hours can reach 97.7%-100%.

The invention relates to the technical field of liquid crystal displaying, in particular to an easy thermal erasing type liquid crystal membrane writing board and a preparation method. The easy thermal erasing type liquid crystal membrane writing board comprises a PET transparent thin membrane with the single side coated with ITO, a liquid crystal thin membrane and a PET non-transparent black thinmembrane with the single side coated with ITO from top to bottom; the sides of conducting layers of the PET transparent thin membrane with the single side coated with the ITO and the PET non-transparent black thin membrane with the single side coated with the ITO are coated with insulating layers. Words written on the easy thermal erasing type liquid crystal membrane writing board can be completely removed under the lower voltage condition; the easy thermal erasing type liquid crystal membrane writing board can be packaged in rolling, and conveniently transported; the erasing and writing temperatures are low, the words can be reserved clearly at 0-4 DEG C, and the words written on the liquid crystal membrane writing board can be completely erased at the temperature between 45-60 DEG C.

The invention discloses a method for preparing a parallel-oriented FePt magnetic nano-composite film, which is characterized by comprising the following steps: 1, utilizing an amphiphilic block copolymer PS-P4VP to self-assemble into a reverse micelle in methylbenzene, and then adding metal salt, namely FeCl3 and H2PtCl6 into reverse micelle solution to form a metal salt supported reverse micelle; 2, utilizing a spin-coating method to obtain a reverse micelle array on a silicon substrate, and obtaining an FePt nano-particle array with good monodispersity through oxygen plasma etching and hydrogen plasma etching; 3, using a magnetic control sputtering method to cover an SiO2 protective layer on the FePt nano-particle array; and 4, performing high-temperature annealing on a sample under protective atmosphere to finish the production of the parallel-oriented FePt magnetic nano-composite film.

The invention provides a high-activity Co-Ni-Fe co-inlaid non-noble metal catalyst as well as a preparation method and application thereof. Based on a preparation method of an organic metal framework compound, the high-activity Co-Ni-Fe co-inlaid non-noble metal catalyst is synthesized by optimizing the contents of Co, Ni and Fe. The multi-metal inlaid catalyst has three active sites of Co-N-C, Ni-N-C and Fe-N-C, and after optimization, the Co-Ni-Fe co-inlaid non-noble metal catalyst has no metal agglomeration phenomenon. Besides, due to rich active sites, the catalyst shows excellent electrochemical activity, the half-wave potential in a 0.1 M KOH solution is as high as 0.881 V (vs.RHE), and the half-wave potential in a 0.1 M HCLO4 solution is as high as 0.798 V (vs.RHE), which are far superior to those of a conventional non-noble metal catalyst. The catalyst has a huge application prospect in the aspect of effectively reducing the cost of the proton exchange membrane fuel cell.

The invention discloses a preparation method of a SnS2 sodium-ion battery anode material with a cubic structure. The preparation method comprises steps as follows: 1), sodium thiosulfate is dissolved in deionized water, a solution A is prepared, stannic chloride pentahydrate is dissolved in the equal amount of deionized water, and a solution B is prepared; 2), the solution B is dropwise added to the solution A, a solution C is obtained, hexadecyl trimethyl ammonium chloride is gradually added to the solution C, and a solution D is obtained; 3), the solution D is subjected to ultrasonic oscillation in an ultrasonic generator; 4), pH of the mixed solution D after ultrasonic oscillation treatment is regulated, and a solution E is prepared; 5), the solution E is subjected to a hydrothermal reaction; 6), after the reaction, a precursor is taken out, centrifugally washed with ionized water and anhydrous ethanol and then subjected to freeze drying, and the SnS2 sodium-ion battery anode material with the cubic structure is obtained. The preparation method is low in preparation cost, simple to operate and short in preparation cycle, and the prepared SnS2 sodium-ion battery anode material with the cubic structure has excellent charge-discharge rate performance.

The invention provides a negative electrode material and a preparation method thereof, a negative electrode and a battery, wherein the preparation method of the negative electrode material comprises the following steps: mixing silicon particles with dispersing agent, thereby forming first mixed liquor; mixing surface active agent, first solvent and carbon source together, thereby forming second mixed liquor; mixing the first mixed liquor with the second mixed liquor, further orderly performing drying and roasting for the obtained mixture, thereby obtaining the negative electrode material. Themethod is simple and convenient to operate and easy to realize; and the negative electrode obtained by the method has relatively good first effect, specific capacity and cycle performance.

The invention relates to the technical field of ultra-short fiber, in particular to an ultra-short electrospinning polyimide nanofiber and a preparing method thereof. The preparing method of the ultra-short electrospinning polyimide nanofiber includes the steps of preparing a polyamide acid solution, conducting electrostatic spinning to form polyamide acid fiber felt, slitting the polyamide acid fiber felt into strips, conducting heat drawing to form high-orientation polyimide nanofiber bundles, and conducting cutting to form the ultra-short electrospinning polyimide nanofiber, wherein the width of the strips obtained by slitting the polyamide acid fiber felt is 3-8 cm, and the length of the ultra-short electrospinning polyimide nanofiber obtained through cutting is 0.1-2.00 mm. The ultra-short nanofiber even in length distribution can be prepared, and the nanofiber is quite high in dispersity and has potential applicability for preparing carbon fiber composites and flexible honeycombmaterials.

The invention relates to the technical field of modified lubricating oil, and particularly relates to a method for preparing graphene-based lubricating oil by micro-explosion graphene dispersion. Themethod comprises the following steps: uniformly dispersing graphene, a mixed solvent, a dispersing agent and a foaming agent, adding nano silicon carbide for ultrasonic dispersion, freeze-drying, adding base lubricating oil, stirring and dispersing, heating and grinding, then adding an antioxidant, uniformly stirring, and defoaming to obtain the graphene-based lubricating oil. The problem that inthe prior art, the ideal lubricating effect of graphene in lubricating oil is difficult to achieve is solved. The graphene-based lubricating oil prepared through the method has the advantages of beingsmall in friction resistance coefficient, high in heat conductivity coefficient, high in stability and good in compatibility, the friction coefficient is small, so that a good protection effect on mechanical parts is achieved, the heat conductivity coefficient is high, and heat generated in the friction process can be removed in time, and therefore, the service lifetime of the mechanical parts isprolonged.

The invention relates to the technical field of antibacterial materials, in particular to a preparation method of a high-load antibacterial nanofiber film. The preparation method comprises the following steps that PVC resin is added into a solvent to be dissolved to obtain a PVC solution, wherein the solvent comprises dimethylformamide; the PVC solution is uniformly mixed with a titanium source toobtain a precursor solution of titanium, and the precursor solution of titanium is prepared into a film by adopting an electrostatic spinning method; and nano titanium dioxide is synthesized with rutile phase content of more than 99% from the titanium source on the film by adopting a hydrothermal method to prepare the high-load nanofiber film. According to the preparation method, the loading rateand the loading stability of the nano titanium dioxide on the PVC surface can be effectively improved.

The invention discloses a solid electrolyte and a preparation method thereof, and relates to the technical field of electrolytes. The solid electrolyte comprises the following components: powder and an adhesive, wherein the mass ratio of the powder to the adhesive is (20-50): (50-80); the powder comprises the following components in percentage by mass: 80%-98% of ZrO2 and 2%-5% of a stabilizer, and the adhesive comprises the following components in percentage by mass: 80%-95% of paraffin, 1%-7% of a first additive and 0.1%-0.8% of a second additive; the preparation method comprises the following steps: mixing 80wt%-98wt% of ZrO2 and 2wt%-5wt% of a stabilizer to obtain powder; carrying out ultrafine treatment on the obtained powder; mixing the powder subjected to the ultrafine treatment with an adhesive, and mixing a mixture obtained after mixing; and after mixing, granulating, injecting, degreasing and sintering to prepare the solid electrolyte. Therefore, the problem of poor thermal shock property of the zirconium oxide tube solid electrolyte in the prior art is solved.

The invention provides a test method of nanometer carbon material oxides based on ultraviolet-visible spectrophotometry. The method comprises the following steps of coating suspension of the nanometer carbon material oxides onto a test carrying seat to obtain a nanometer carbon material oxide film; performing in-situ reduction treatment to obtain a reducing state nanometer carbon material film; using the ultraviolet-visible spectrophotometry for respectively testing the light absorption performance of the nanometer carbon material film before and after the in-situ reduction treatment; correspondingly obtaining the parameters before the reduction and the parameters after the reduction; comparing the parameters before the reduction and the parameters after the reduction; obtaining the influence of the reduction degree on the light absorption performance and the structure. By using the test method provided by the invention, an interface limitation sample manufacturing method is used, so that the sample to be tested is limited by the interface, so that after the in-situ reduction, the agglomeration phenomenon cannot occur; the long-period stability of the samples of the nanometer carbon material oxides can be maintained, so that the stability and the reliability of the experiment results can be ensured; in addition, great convenience is brought to the test process of the ultraviolet-visible absorption spectrum.