8results about How to "With large-scale production" patented technology

The invention relates to a high-temperature-resistant high-thermal-conductivity single-component epoxy pouring sealant and a preparation method thereof, and the high-temperature-resistant high-thermal-conductivity single-component epoxy pouring sealant comprises the following components: 1-10 parts of modified high-temperature-resistant epoxy resin, 0.5-5 parts of modified core-shell epoxy resin, 90-98 parts of thermal conductive powder, 0.5-5 parts of a phenyl-containing diluent, 10-50 parts of a dicyandiamide curing agent, 0.1-1 part of a powder dispersant and 0.1-2 parts of an accelerant. The modified high-temperature-resistant epoxy resin is obtained by grafting phenolic resin to epoxy resin. And dispersing the organic silicon core-shell nanoparticles in epoxy resin to obtain the modified core-shell epoxy resin. When the epoxy pouring sealant is prepared, a small amount of modified resin is added, and the dicyandiamide curing agent, the phenyl-containing diluent and different types of heat-conducting powder are matched, so that the heat stability of the epoxy pouring sealant can be remarkably improved.

The invention relates to a core-sheath type intelligent fiber with an elastic strain sensing and temperature adjusting composite function and a preparation method and application thereof.The intelligent fiber is prepared through a one-step coaxial wet spinning technology and comprises an elastomer sheath layer and a core layer formed by evenly mixing an elastomer with conductive filler and phase change filler, the conductive filler is a carbon material or a metal material, and the phase change temperature of the phase change filler is 20-40 DEG C; the conductive filler accounts for 1%-5% of the mass of the core layer, and the advancing speed ratio of the sheath layer to the core layer is (0.5-3): 1. The prepared fiber has an obvious core-sheath structure and good elasticity, conductivity and temperature adjustment performance, and by weaving the fiber into textiles or embedding the fiber into clothes, not only can health signals of a human body be monitored, but also the ambient temperature around the human body is adjusted, so that the fiber is more comfortable to wear.

The invention discloses polyether ester type polyurethane with a shape memory characteristic and a preparation method of the polyether ester type polyurethane, and belongs to the field of high polymer materials. The preparation method comprises the following steps: firstly, using an epoxy compound and a cyclic lactone compound as comonomers, carrying out ring opening polymerization by using a cheap and easily available commercial catalyst to synthesize polyether ester polyol, and introducing a small amount of ester groups into a polyether structural unit as ester exchange sites, so that the compatibility of the polyester structural unit and the polyether structural unit is improved; the polyether ester random copolymer with uniform and controllable performance is prepared; then introducing an isocyanate compound, a chain extender and a branching agent into a reaction system to synthesize polyether ester polyurethane with a long-chain branched structure. The polyether ester type polyurethane is prepared through a one-pot method, the method is simple in route, low in cost and environmentally friendly, the obtained polymer has the shape memory characteristic, the performance of the polymer can be regulated and controlled by adjusting copolymerization components, and the method has the prospect and potential of large-scale production.

The invention discloses a nano porous nickel electrocatalyst material as well as a preparation method and application thereof. Belongs to the technical field of electrolyzed water hydrogen production catalysts. According to the method, a nickel net substrate is subjected to pretreatment, electrogalvanizing, high-temperature alloying and chemical dealloying, and finally the nano-porous nickel electrocatalyst material growing on the nickel net is obtained. The electrocatalyst material prepared by the method has a uniform three-dimensional nano porous structure, the thickness of a porous layer is 10-70 [mu] m, and the aperture is 100-500 nm. As an alkaline electrolytic water hydrogen evolution reaction cathode catalyst, the material has high specific surface area and rich active sites, and shows lower overpotential and excellent long-term stability. The method is simple in technological process, raw materials are easy to obtain, and the method has large-scale production potential and has wide application prospects in the field of hydrogen production through water electrolysis.

The invention discloses a Fe-doped K0. 5Mn4O8 nano crystal whisker material and a preparation method thereof, and belongs to the field of inorganic materials. The preparation method comprises the following steps: dissolving iron nitrate nonahydrate, urea, a manganous nitrate aqueous solution and potassium permanganate in purified water, and carrying out constant-temperature reaction in a hydrothermal reaction kettle; and filtering the reaction product, drying in a drying oven, calcining in a muffle furnace, and cooling to obtain the Fe-doped K0. 5Mn4O8 nano whisker material. According to the method, the electrochemical performance of the K0. 5Mn4O8 nano whisker material is improved through Fe doping, a one-dimensional nano whisker structure is observed microcosmically, part of whiskers are mutually wound to form a fluffy interwoven network, the specific surface area of the material is remarkably increased, rich active sites are provided, and interface charge transfer kinetics is accelerated. Due to optimization of the electronic structure of the material and the unique microstructure of the material by Fe doping, the material shows good electrochemical stability when being used as the positive electrode of the zinc ion battery.

This invention relates to a method for preparing recycled polyesteramide based on an ester-amide exchange reaction. The invention first involves ester-amide exchange of waste polyamide to obtain polyamide esters, then purifying the polyamide esters to remove color and impurities, and finally obtaining recycled polyesteramide through vacuum polycondensation and de-alcoholization. Compared with existing technologies, this invention eliminates the need to depolymerize waste polyamide into caprolactam monomers, resulting in lower energy consumption, relatively mild reaction conditions, and simple operation. It can be completed using conventional reaction equipment and has the potential for large-scale production. This invention achieves efficient recycling of waste polyamide and high-value-added regeneration of polyesteramide, providing technical support for the recycling of waste polyamide textiles.

The application belongs to the technical field of biological medicine, and particularly relates to a Brucella recombinant multi-epitope vaccine and application thereof. The application provides a Brucella recombinant multi-epitope vaccine protein, and the vaccine protein is a first vaccine variant rBMEV1 or a second vaccine variant rBMEV2. The results of examples prove that the vaccine provided by the application can stimulate a strong cross immune response against main pathogenic species (such as sheep species, bovine species and porcine species) of Brucella. Animal tests prove that the vaccine can induce high-level and long-lasting specific antibodies, and significantly activate CD4 + and CD8 + T cells and corresponding cytokine responses, and has good safety. The application solves the problems of a narrow protection spectrum, a dependence on exogenous adjuvants and a single immune type of a traditional Brucella vaccine, and provides a new generation of high-efficiency, broad-spectrum and safe candidate vaccine strategy for the prevention and control of brucellosis.

The invention provides SiC-ZrC ceramic fiber aerogel with high flexibility and low thermal conductivity and a preparation method of the SiC-ZrC ceramic fiber aerogel, and relates to the field of aerogel materials. The method comprises the following steps: preparing a spinning solution containing a silicon precursor, a zirconium precursor and polyvinylpyrrolidone, and carrying out electrostatic spinning, pre-oxidation and heat treatment to finish ceramic treatment of SiC and ZrC fibers in one step, so as to prepare SiC-ZrC ceramic fiber aerogel with a three-dimensional fiber network structure; the diameter of fibers in the aerogel is nanoscale, and the microstructure comprises a SiC nanofiber matrix and ZrC nanoparticles which are uniformly distributed. The SiC-ZrC ceramic fiber aerogel integrating excellent mechanical property and heat insulation property is finally prepared by regulating and controlling the content of the zirconium precursor, spinning parameters and heat treatment parameters and accurately controlling the fiber morphology and aerogel performance; the method is simple in process, good in controllability, high in repeatability and suitable for large-scale production.