31results about How to "Avoid reunion situations" patented technology

The invention discloses a composite material combining PVC (Polyvinyl Chloride) elastomer with super high molecular weight and fluorubber. The composite material is prepared from the following raw materials in parts by weight: 50-90 parts of fluorubber, 9-30 parts of PVC elastomer with super high molecular weight and 1-20 parts of nanometer carbon black with surface modified by a silane coupling agent, wherein the silane coupling agent is N'-vinyl benzyl-N-trimethoxysilane propyl ethylenediamine salt. The invention modifies the surface of the nanometer carbon black by adopting the silane coupling agent VTSD and realizes a nanometer carbon black/PVC/fluorubber multi-phase composite structure with uniform dispersion in mixing rubber so that the modified nanometer carbon black effectively reinforces PVC/fluorubber. The invention also discloses a preparation method of the composite material, and the method is simple, easy to control and suitable for industrial production.

The invention discloses a preparation method of a flexible sensor based on carbon nanometer paper, and belongs to the technical field of sensors. The preparation method comprises the steps that the carbon nanometer paper is taken, the carbon nanometer paper is cut according to the mold size, the cut carbon nanometer paper is put on a glass slide and is fixed, the cut carbon nanometer paper and a wire are bonded and fixed through an adhesive to be cured, and a carbon nanometer paper sensor is prepared; the curing temperature ranges from 50 DEG C to 150 DEG C, and the curing time ranges from 15min to 30 min; silicone rubber and a curing agent are mixed uniformly according to the proportion, and a silicone rubber solution is prepared; and the carbon nanometer paper sensor is soaked in the silicone rubber solution and is subjected to curing forming, and the flexible sensor based on the carbon nanometer paper is prepared. In the preparation process, the silicone rubber is soaked in the carbon nanometer paper, vacuum forming is combined, and agglomeration can be effectively avoided; and the prepared flexible sensor has good electric conductivity, and compared with metal sensors, the thickness can be greatly reduced.

The invention discloses high-conductivity lithium iron phosphate powder and a preparation method thereof. The preparation method comprises the steps as follows: 1) formation of precursor of high-conductivity lithium iron phosphate: a lithium hydroxide solution is stirred and mixed with phosphoric acid; a graphene oxide dispersion liquid is added and stirred; iron sulfate heptahydrate is added and stirred, and a uniform mixture is obtained; the mixture is filtered, washed and dried, and black powder, namely, the precursor of the high-conductivity lithium iron phosphate, is obtained; 2) formation of high-conductivity lithium iron phosphate powder: the precursor, obtained in the step 1), of high-conductivity lithium iron phosphate and lithium carbonate are subjected to ball milling and uniformly mixed, the mixture is calcined in the atmosphere of inert gas, and the high-conductivity lithium iron phosphate powder is obtained. The lithium iron phosphate powder prepared with the method has high conductivity, large specific surface area and higher compaction density, has the particle size of 0.5-1 mu m, has 1-5 layers of graphene and has the iron-phosphorous ratio of 0.95-1.05, and a produced pole piece has the surface resistance of 60 omega and has wide application prospects in the lithium ion battery field.

The invention discloses a catalytic cracking gasoline adsorption dearsenification catalyst with large specific surface area, hierarchical pore distribution and high dearsenification performance and a preparation method thereof, and the method comprises the following steps: 1) mixing active carbon and pseudo-boehmite in proportion, grinding, stirring, adding a pore-enlarging agent and an acid solution, extruding into strips, drying, and roasting under an anaerobic condition to prepare a carbon-alumina composite carrier; (2) adjusting the pH value of the metal precursor solution, and impregnating the solution containing the active metal precursor into the carrier by adopting an isovolumetric saturated impregnation method; and 3) drying the catalyst, and roasting in an oxygen-free environment to obtain the finished product catalyst. The carrier with a composite pore channel structure can improve diffusion, reaction and escape of reactant molecules in pore channels, and the reaction efficiency is improved; metal with partially filled d tracks is selected as active metal, so that the acting force between the arsenide and the metal can be improved, and the arsenide is deeply removed; the pH value of the metal precursor solution is adjusted to be higher than the isoelectric point of the metal oxide or hydroxide, the acting force between the metal and the carrier can be weakened, the dispersity of the metal is improved, and finally the arsenic removal efficiency of the catalyst is improved.

The invention relates to an electrically conductive organic polymer coated phenolic resin-based porous carbon composite material. A preparation method for the material comprises the following steps: (1) water-soluble phenolic resin and curing agent are orderly added in an anhydrous alcohol solution to obtain a mixture; after stirring and curing operation, a cured phenolic resin is obtained; (2) phenolic resin microspheres obtained in step (1) are carbonized and calcined in an inert gas atmosphere at a temperature of 850 to 950 DEG C to obtain phenolic resin-based porous carbon; (3) the phenolic resin-based porous carbon obtained in step (2) is added to a 30-60 ml acetone solution, and then a surfactant is added to obtain a mixed solution after ultrasonic dispersion. Electrically conductivepolymer monomers are ultrasonically dispersed in an acetone solution to obtain an electrically conductive polymer monomer acetone solution. The electrically conductive polymer monomer acetone solution is added dropwise to the mixed solution, microwave hydrothermal reaction was performed, and the electrically conductive organic polymer coated phenolic resin-based porous carbon composite material with high specific capacity, specific energy density, and good cycle stability is obtained.

The invention relates to a high-conductivity flexible touch graphene composite material and a preparation method thereof. The high-conductivity flexible touch graphene composite material comprises thefollowing components: 20 to 25 parts of graphene hydrosol, 5 to 8 parts of aluminum powder, 1 to 10 parts of carbon nanotube, 0.3 to 0.4 part of potassium carboxymethylcellulose, 10 to 14 parts of polyimide, 6 to 8 parts of polydimethylsiloxane, and 0.2 to 0.45 part of zirconium dioxide powder. The preparation method comprises the following step: mixing all the components, so as to form the high-conductivity flexible touch graphene composite material. The method is simple in technology, effectively avoids the situation of agglomeration caused by large specific surface area of graphene powderthrough the added the graphene hydrosol, optimizes a conductive network structure in the composite material through the added zirconium dioxide powder and a potassium carboxymethylcellulose dispersingagent, further improves the electrical conductivity of the composite material while enhancing the ductility of the composite material through the added aluminum powder, and meets the application requirements on flexible touch materials by current electronic devices.

The invention relates to the technical field of anti-corrosion coatings, in particular to a formula and a preparation method of a carbon nanotube efficient anti-corrosion coating. The formula of the carbon nanotube high-efficiency anticorrosive coating consists of high chlorinated polyethylene resin, organic bentonite, carbon nanotubes, an organic solvent, organic silica sol, a defoaming agent, a dispersing agent, a curing agent, a coalescing agent, a diluent, silver powder, a plasticizer and deionized water. In the preparation process of the carbon nanotube anticorrosive paint, the diluent, the silver powder and the plasticizer are added, so that the viscosity and the rheological property of the paint can be adjusted, the Van der Waals force among anticorrosive paint molecules can be properly weakened, and the condition of agglomeration among the paint in the storage process can be avoided; meanwhile, the heat resistance of the whole carbon nanotube anticorrosive paint in the using process can be improved, the overall using performance of the paint is further improved, and the using effect of the whole paint is further improved through the coalescing agent.

The invention belongs to the technical field of cement manufacturing and particularly relates to a cement production method. The method comprises the steps of first, raw material grinding, wherein limestone and clay are homogenized after being broken and ground; second, clinker calcination, wherein homogenized raw material particles are sent into a preheater and a rotary kiln for calcination and curing; third, cement grinding, wherein calcined clinkers are ground to appropriate granularity, and a certain particle grading is formed; and fourth, cement bagging, wherein ground powdery cement is bagged and sealed. In the fourth step, a cement bagging machine is adopted for cooperation in the cement bagging process. When the cement is bagged through the method, the sealing effect at a bag opening is improved, and overflow of the powdery cement is avoided; and meanwhile, the situation of cement powder aggregation is avoided, bagging efficiency is improved, and it can be guaranteed that the bagging amount is identical every time.