48results about How to "Act as a pore" patented technology

The invention discloses a preparation method of a porous polyvinyl chloride-graphene composite material. According to the preparation method, hydrophobic modified nano-graphene, an N,N-dimethylformamide solution of polyvinyl chloride and sodium chloride are mixed by virtue of a high energy ball milling method, and finally, the mixture is dropwise added into distilled water to form porous polyvinyl chloride-graphene particles; a pore-foaming agent is compatible with water to form a surface layer with less pore structures, the compatiblility speed of the pore-foaming agent with water in a sphere is decreased due to the blockage of the surface layer and generates a pore forming effect in a slow dissolving-out process, and formed holes are uniformly distributed and uniform in particle sizes and have good through-hole and opening performance; meanwhile, by adding hydrophobic modified nano-graphene, the prepared composite material has good hydrophobic property, and a porous structure can be applied to oil-water separation such as water pollution treatment; and furthermore, a process of the preparation process is convenient to industrial control, and the application field of polyvinyl chloride is expanded.

The invention relates to a preparation method of an in-situ nitrogen-doped porous carbon material, belonging to the technical field of material science. According to the method, magnesium-aluminum hydrotalcite synthesized in situ serves as an auxiliary pore forming agent, phenols or methyl substituted phenols, formaldehyde and nitrogen-containing monomers are copolymerized, a nitrogen-doped carbonprecursor is generated through a one-pot hydrothermal method, and then high-temperature roasting and acid treatment are carried out to prepare the porous carbon material. The specific surface area, pore size distribution and nitrogen doping amount of the nitrogen-doped porous carbon are regulated and controlled by controlling the molar ratio of phenolic aldehyde, the dosage of nitrogen-containingpolymeric monomers, the ratio of magnesium-aluminum to a phenol polymeric monomers and hydrothermal reaction conditions; and the prepared material is high in carbon residue rate and narrow in pore size distribution range. The method can avoid usage of hydrofluoric acid, and is high in operability and friendly to environment.

The invention relates to a protein macromolecule imprinted calcium phosphate / calcium alginate hybrid microsphere and a preparation method thereof. The composition and weight percentage of calcium phosphate / calcium alginate hybrid microspheres for western blotting are as follows: sodium alginate 20%-40%, diammonium hydrogen phosphate 1%-10%, calcium chloride 50%-65%, Protein 0.5-10%. The calcium phosphate / calcium alginate hybrid microspheres prepared by the present invention show that the adsorption capacity of the imprinted microspheres is 1.8 to 5 times that of the non-imprinted microspheres, that is, the microspheres prepared without adding protein, according to the protein adsorption test results. Conductivity titration and infrared spectroscopy tests show that diammonium hydrogen phosphate and sodium alginate can interact with CaCl2 to produce new hybrid components. The invention has the advantages of simple preparation method, easy control of the reaction process, etc., solves the shortcomings of pure calcium alginate such as low mechanical strength and imprinting efficiency, unstable performance, difficult diffusion of protein macromolecules, and the like, and has broad application prospects.

The invention belongs to the technical field of nanometer materials and preparation thereof and particularly relates to a magnetic mesoporous carbon / nano TiO2 compound adsorbent and a preparation method thereof. The compound adsorbent contains 50 to 80 percent of nano TiO2, 10 to 20 percent of magnetic metal nanoparticles and 10 to 30 percent of mesoporous carbon, wherein the mesoporous carbon is taken as a carbonaceous substrate; the nano TiO2 is distributed on the carbonaceous substrate; the magnetic metal nanoparticles are embedded in mesopores of the carbonaceous substrate. The preparation method of the magnetic mesoporous carbon / nano TiO2 compound adsorbent comprises the following steps of dispersing TiO2 nanoparticles in resin; adding transition metal hydroxide colloidal particles as a template agent; performing resin impregnation, heating curing, high temperature carbonization, washing and purifying and the like to obtain the magnetic mesoporous carbon / nano TiO2 compound adsorbent. According to the magnetic mesoporous carbon / nano TiO2 compound adsorbent disclosed by the invention, organic pollutants can be quickly and efficiently absorbed to be nearby the surface of the nano TiO2, and organic matters are decomposed into small-molecule gases or soluble substances, so that the biological toxicity and the environment pollution of the organic matters are reduced; the adsorbent can be separated and recovered by magnetic particles, so that secondary pollution to a water body is avoided, and the recycling of the adsorbent is facilitated.

A porous Si3N4 ceramics preparation method relates to a method for preparing the Si3N4 ceramics, and solves the problem of low porosity of porous Si3N4 ceramics prepared by the prior art. The method is as follows: mixing alpha-Si3N4 powder and combustion assistant evenly; making the mixture and aqueous polyvinyl alcohol solution into slurry; refrigerating the slurry until the slurry completely freezes; carrying out low-temperature vacuum dehydration; moulding the slurry to green body with various shapes based on requirement before refrigeration; and sintering the dried green body to obtain porous Si3N4 ceramics. The porous Si3N4 ceramics prepared by the method have adjustable pore diameter and porosity which can reach as high as 95%. Process of the method is simple with good repeatability.

The invention discloses a high efficiency hardening resistant micro-electrolysis material. The porosity is 0.5 to 0.8 and the specific surface area is 0.4 to 1.0m2 / g. The preparation method is that at first ferrous powder, active carbon powder, sodium bentonite and NH 4Cl are mixed fully, water is added and stirred evenly, in the second place, small balls the diameter of which is 2 to 5mm are made through a ball forming mill and then dried and finally the dried spherical material is roasted and cooled to room temperature naturally. Compared with the traditional micro-electrolysis material, the invention has the advantages that NH3 generated by NH4Cl at high temperature is used to create pores, the porosity and the specific surface area of material are increased, the elimination effect of the micro-electrolysis material on pollutant in waste water is improved, meanwhile because the material is spherical regular material, the invention has good mechanical strength, the compaction of thematerial in the use process is avoided, the material does not tend to be hardened and passivated, the service life is long and consequently the long-term stable running of the micro-electrolysis technology is ensured.

The invention relates to the technical field of oleic acid hydrogenation, and particularly discloses a preparation method of a transition metal doped 3R type molybdenum disulfide catalyst. The preparation method comprises the following steps: 1, grinding and mixing sodium molybdate, a transition metal salt precursor, sodium thiocyanate and inorganic salt by using a ball mill for not less than 6 h;and 2, carrying out annealing treatment on the mixture obtained in step 1 at an annealing temperature of not less than 300 DEG C, cooling to room temperature after the reaction is finished, dissolving and washing the reacted mixture with a solvent, and drying the reacted mixture to obtain the transition metal doped 3R type molybdenum disulfide catalyst. The transition metal doped molybdenum disulfide with the crystal form of 3R prepared by adopting the technical scheme in the patent has better hydrogenation reaction capability compared with a commercial doped molybdenum disulfide catalyst.

The invention discloses a fine ferric oxide desulfurizing agent and a preparation method and an application method thereof. The fine ferric oxide desulfurizing agent is prepared from ferrous sulfate septihydrate, calcium hydroxide, copper sulfate pentahydrate, sodium hydroxide, bentonite and sodium carboxymethylcellulose through mixing, strip extrusion and drying, and comprises, by mass, 57%-68% of ferrous sulfate septihydrate, 18%-25% of calcium hydroxide, 3%-8% of copper sulfate pentahydrate, 6.5%-18% of sodium hydroxide, 3%-10% of bentonite and 1%-3% of sodium carboxymethylcellulose. The fine ferric oxide desulfurizing agent is applied to removal of natural gas, coke-oven gas, oil field gas, synthesis gas, methane, carbon dioxide and organic sulfur such as H2S, COS and mercaptan in liquid hydrocarbon feed gas under the normal-temperature anaerobic condition and is high in desulfurization precision and sulfur capacity. The environment-friendly fine ferric oxide desulfurizing agent is prepared without washing and filtering, and the preparation method has the advantages of simple production technology, low equipment investment and maintenance cost and suitability for large-scale industrial production.

The invention discloses an artificial diamond drill material, a drill and a production process thereof, and belongs to the technical field of diamond drills. The artificial diamond bit material of the present invention comprises matrix powder and cutting diamond coarse powder, and said matrix powder comprises pre-alloyed powder and diamond micropowder, and its material composition and the mass fraction of each component are: Fe 71.00~76.00 parts , 15.00-18.00 parts of Cu, 1.00-2.00 parts of C, 0.30-0.50 parts of Si, 1.50-2.50 parts of Sn, 3.00-5.00 parts of diamond powder; among them, the particle size of cutting diamond coarse powder is 35-60 mesh, and the concentration is 70- 80%; the particle size of the diamond powder is at least 170 mesh. According to the above-mentioned materials, the production process steps of the diamond drill bit include: powder making, material mixing, mold loading, sintering, machining and grinding, and water planing. In the sintering process, the sintering temperature is reduced and heated according to a specific sintering curve to obtain An artificial diamond drill bit can improve the slipping phenomenon of the drill bit and increase the abrasiveness of the drill bit.

The invention discloses a preparation method of a 5A molecular sieve adsorbent. The method comprises the following steps: mixing and kneading 4A molecular sieve raw powder, clay, sodium carbonate, an auxiliary agent and water according to a ratio to obtain a wet material mass; forming the lumps to obtain strip-shaped particles, and rounding the strip-shaped particles to obtain spherical particles; drying and roasting the spherical particles; carrying out crystallization reaction on the roasted material, so that the binder is subjected to solid-state crystal transformation; and carrying out ion exchange on the obtained product in a calcium solution, and then drying and roasting to obtain the 5A molecular sieve adsorbent. The method omits an alkali treatment step, reduces waste liquid discharge, and is easy to operate; the prepared spherical 5A molecular sieve adsorbent has the characteristics of high adsorption capacity, high mass transfer rate, high compressive strength and the like.

The invention relates to a high-safety diaphragm and its preparation method and application. The preparation method includes: (I) mixing fluorocarbon polymers, inorganic ceramic materials and plasticizers, and heating to obtain mixed granular materials; (II) Laminate the mixture to obtain a sheet-like blank; (III) Roll the sheet-shaped blank to obtain a diaphragm; (IV) Coat the surface of the diaphragm with a release agent, and coat multiple surfaces with a release agent stacking and laminating the sheets to obtain a multi-layer diaphragm; (V) rolling the multi-layer diaphragm to obtain multiple films; (VI) extracting and heating each film to obtain the high-safety diaphragm . The preparation method can not be required by the fluidity of the slurry, can generate a diaphragm with a high content of inorganic ceramic materials, effectively improves the safety of the diaphragm, can improve the yield, and is easy to control the thickness and pores of the diaphragm.