52results about How to "Uniform microporous structure" patented technology

The invention belongs to the fields of building materials and construction technology. Light-weight concrete consists of a concrete base layer and waterproof surface layers, wherein the concrete base layer comprises the following components in parts by weight: 100 parts of cement, 0.1-10 parts of chrysotile fibers, 0.01-2 parts of water repellent, 10-30 parts of pulverized fuel ash, 0.1-6 parts of water reducer, 50-200 parts of water, and 1-20 parts of foaming agent or air entraining agent; the upper side and the lower side of the concrete base layer are coated with the waterproof surface layers which comprise the following components in parts by weight: 100 parts of penetrating type organosilicon waterproofing agent, 0.1-20 parts of nano TiO2, 0-2 parts of activity enhancer, 0.01-5 parts of dispersion stabilizer, and 50-200 parts of solvent. Correspondingly, the microporous structure of the foam concrete or air-entrained concrete is uniform, and the mechanical performance is improved.

Provided are a novel foam which has a uniform fine-cell structure and is excellent in toughness and heat resistance, and a production method therefor. Also provided is a functional foam which includes the above-mentioned foam and has imparted thereto various functions. The foam includes spherical cells, in which: the spherical cells each have an average pore diameter of less than 20 μm; the foam has a density of 0.15 g/cm³ to 0.9 g/cm³; and the foam is crack-free in a 180° bending test. The functional foam includes the foam.

The invention discloses a catalyst for coal liquefaction, a preparation method and an application thereof. The catalyst comprises the following raw materials in percentage by weight: 0.001-50 active catalyst components and 50-99.999 molecular sieve carriers, and the active catalyst components are VIB and/or VIII metal element oxides. The catalyst has the advantages of high catalytic activity, simple preparation method and mild reaction conditions for the direct coal liquefaction.

The invention provides an activated carbon fiber composite material which is prepared from activated carbon fiber, staple fiber, powdered activated carbon, modified cellulose, processing aids and the like. As an adsorbing material of an efficient activated carbon filter element, the activated carbon fiber composite material overcomes the problems of poor intensity and easy slipping of lint of an activated carbon fiber felt, reserves the rich and uniform micro-pore structure of the activated carbon fiber and has all meso-pores of high-quality powdered and granular activated carbon, so that the activated carbon fiber composite material has large adsorption capacity and has a wide range of application for adsorbing organic matters. Moreover, the filter element prepared from the material is resistant to high temperature as well as acid and alkali and can be widely applied to electroplating production lines of the PCB (Printed Circuit Board) industry.

The invention discloses an MOFs derived carbon-based material anchored high-dispersion metal Pt nanocluster as well as a preparation method and application thereof. The average particle size of Pt nanoclusters is 1-2nm; an MOFs derived carbon-based material is a nitrogen-doped MOFs derived carbon-based material; and the Pt nanoclusters are uniformly distributed in the MOFs derived carbon-based material. The preparation method comprises the following steps of: dissolving the nitrogen-doped MOFs derived carbon-based material loaded with high-dispersion metal Zn into a precursor solution of platinum; performing stirring to carry out an in-situ replacement reaction so as to reduce metal Pt from the precursor solution by the metal Zn; and carrying out post-treatment after the reaction is finished, so as to obtain the MOFs derived carbon-based material anchored high-dispersion metal Pt nanocluster. The preparation method is simple; and the obtained Pt nanocluster is small in nano size, highin dispersion, highly exposed in active center, excellent in HER catalysis performance and good in electrochemical stability.

The invention discloses a preparation method of an electrochemical sensor for trace lead ion detection, belonging to the technical field of environmental detection and analysis. The method comprises the following steps: step 1: enabling gelatin-based microcapsules, which are prepared through a complex coacervation method, to be frozen and dried, and enabling carbonized microcapsule powder to be ultrasonically dispersed in a chitosan acetic acid solution; step 2: taking 5 mu L of carbonized microcapsule dispersion liquid, which is prepared in step 1, to serve as an electrode material so as to modify the surface of a glassy carbon electrode to act as a working electrode; step 3: adding different concentrations of lead ion electrolyte into a buffer solution to form 5 mL of a to-be-tested solution, inserting an electrode system in step 2 into the lead ion electrolyte, and enriching lead ions in the electrolyte at constant voltage; step 4: obtaining the standard curves of peak current values and lead ion concentrations by adopting a differential pulse anodic stripping voltammetry; and step 5: detecting lead ion concentrations in to-be-tested samples. The working electrode modification material prepared by the invention has the advantages of simple preparation, low cost, controllable structure, good repeatability and the like.

The invention discloses a preparation method of a shape memory fiber membrane with an adjustable fiber surface micropore structure and an application of drug release of the membrane, relates to a preparation method of a shape memory fiber membrane and an application of the membrane, and aims to solve the problems that the drug release process of an existing drug loading material cannot be controlled, and drug loading capacity is low. The preparation method of the shape memory fiber membrane includes the steps: dissolving polymer in an organic solvent to obtain polymer solution; transferring the polymer solution into electrostatic spinning forming. A drug release method includes the steps: preparing the drug-loading shape memory fiber membrane with the adjustable fiber surface micropore structure; performing stretching treatment and drug blocking; taking shape memory recovery measures to the drug-blocked shape memory fiber membrane to perform shape memory recovery. The fiber surface ofthe fiber membrane prepared by an electrostatic spinning process is provided with the uniform micropore structure, the drug loading capacity is high, the size and the shape of the fiber surface micropore structure can be adjusted by heating treatment or ultrasonic treatment, and drug loading and drug release are realized.

The invention belongs to the technical field of new energy materials, and particularly relates to a porous carbon material based on a porous organic polymer structure, which can be used for a supercapacitor electrode. The preparation method comprises the following steps: dissolving a boric acid organic monomer and 2,4,6-tris(4-bromophenyl)-1,3,5-triazine in DMF; freezing the mixture with liquid nitrogen, pumping air through an oil pump, unfreezing the mixture, and repeating the process for three times; rapidly adding a catalyst into a reaction system, freezing the catalyst by using liquid nitrogen, pumping air by an oil pump, performing unfreezing, repeatedly performing the step for three times, performing heating, carrying out a reflux reaction under a nitrogen condition for 2 days, performing cooling to room temperature after the reaction is finished, and repeatedly washing solids generated by the reaction by using an organic solvent for multiple times; carrying out vacuum drying toobtain the porous organic polymer LNUs; placing the polymer in a quartz boat, then horizontally placing the quartz boat in a tubular furnace, and performing heating under the protection of nitrogen toobtain a target product. The material has a good application prospect in an electrode material of a super capacitor.

The invention belongs to the technical field of adsorbent preparation, and particularly relates to an adsorbing material for capturing radioactive element iodine. The material is prepared by the following steps: (1) dissolving mordenite in water to form turbid liquid; (2) preparing a 0.1-0.2 mol/L silver nitrate solution under a dark condition; (3) pouring the silver nitrate solution into the turbid liquid, and heating to boil in a stirring reflux state; (4) quickly adding a first complexing agent into the boiling liquid in the step (3); (5) preparing a sodium carbonate solution, and adding the sodium carbonate solution into the step (4); (6) adding a reducing agent into the solution obtained in the step (5), uniformly stirring, and heating in a water bath at 80 DEG C for 30 minutes; (7) performing suction filtration on the product obtained in the step (6); (8) preparing 0.01-0.3 mol/L of a copper sulfate solution; (9) dissolving a second complexing agent in deionized water; (10) adding the copper sulfate solution into the solution obtained in the step (9) in a stirring state, and adding a stabilizer and a reducing agent; (11) adding Ag-mordenite into the mixture obtained in the step (10); and (12) carrying out suction filtration on the mixture obtained in the step (11), and drying the filter cake at 110 DEG C for 24 hours.

The invention relates to an environment-friendly soft porcelain preparation method which comprises the steps of preparing nano silver fiber, modifying boron nitride nanotubes, preparing phase change microcapsules, preparing soft porcelain and performing surface treatment. The environment-friendly soft porcelain is prepared from 30 to 50 parts of inorganic powder, 15 to 35 parts of cement, 10 to 15parts of phase change microcapsules, 10 to 30 parts of acrylic polymer emulsion, 0 to 2 parts of pigment, 0.5 to 2 parts of a coupling agent, 0.5 to 1.2 parts of montmorillonite, 0.5 to 1.2 parts ofkieselguhr and 0.8 to 1.5 parts of wood fiber. The environment-friendly soft porcelain prepared by the preparation method disclosed by the invention has the advantages of good breathability and antifouling, self-cleaning, temperature-regulating and moisture-control performance.

The invention discloses a hydrophilic diaphragm and a battery containing the hydrophilic diaphragm. The hydrophilic diaphragm is a microporous membrane containing a hydrophilic high polymer material; and the aperture of the hydrophilic diaphragm is 0.1-5 microns, the thickness of the hydrophilic diaphragm is 20-500 microns, and the porosity of the hydrophilic diaphragm is 30-90%. The hydrophilic diaphragm has the beneficial effects that the wettability of the hydrophilic diaphragm in a water-based electrolyte is obviously superior to that of commercial PP and PE microporous membranes and hydrophilic treated polyolefin diaphragms, the capacity of absorbing the water-based electrolyte is higher, and the conductivity of the diaphragm is higher; the hydrophilic diaphragm disclosed by the invention has a uniform microporous structure, the barrier capacity of the hydrophilic diaphragm is higher than that of non-woven fabric, fiber paper and a glass fiber membrane, and the risk of internal short circuit of the battery can be reduced; the hydrophilic diaphragm and electrolyte act together to induce regular growth of zinc dendrites, so that the cycle life of a metal zinc electrode is prolonged; and polarization overpotential of Zn dissolution/deposition is optimized, and the electrochemical performance of the zinc electrode is improved.

The invention discloses a method for preparing a composite polypropylene microporous film by a phase conversion method and product and application of the composite polypropylene microporous film. According to the preparation method, a coating layer is introduced to surface(s) of one side or two sides of the film by a first mode (immersion precipitant phase conversion method) or a second mode (dryphase conversion method) during the fabrication process of bidirectionally stretching a polypropylene microporous substrate layer, the coating layer is only stretched in a longitudinal direction and atransverse direction or is only stretched in the transverse direction, and the preparation of the composite polypropylene microporous film is achieved. With the adoption of the method, the productionprocess of the composite polypropylene microporous film is simplified, the fabricated coating layer is high in porosity, the microporous structure is uniform, and the performance of the polypropylenemicroporous substrate layer can be improved very well. The composite polypropylene microporous film is applied into a lithium battery, the coating layer is a polymer or a composition capable for forming gel with an electrolyte, and thus, the cycle property and the safety of the lithium battery can be improved. The invention also provides a lithium battery diaphragm, and the lithium battery diaphragm comprises the composite polypropylene microporous film.

The invention provides a homodisperse method for lignocellulose, and belongs to the field of chemical engineering. The method comprises the steps of raw material smashing, alkali treatment, microwave acid treatment, polymerization treatment and regrinding. According to the lignocellulose treated through the method, powder is embrittled through acid and alkali treatment, the microcellular structure is enlarged and subjected to a grafting reaction with a polymer, on the basis of the physical refining technology, the obtained lignocellulose is good in cellulose dispersibility, the fineness can reach 300-800 meshes, and the microhole structure can still be kept; the lignocellulose can be uniformly dispersed after being added into the coating, the coating has the good heat preservation, heat insulation, sound insulation, insulation and gas permeability, thermal expansion is uniform, no flaking is caused, and the deep layer cracking resistance and scratch resistance are improved.

The invention discloses a water-based foaming pore regulator suitable for synthetic leather and relates to the technical field of synthetic leather functional aids. The water-based foaming pore regulator suitable for the synthetic leather is prepared from the following raw materials in parts by weight: 15 to 20 parts of nano-titanium dioxide modified poloxamer, 5 to 10 parts of hydroxypropyl methyl cellulose, 3 to 5 parts of sodium polyacrylate, 2 to 3 parts of hydrolytic polymaleic anhydride, 1 to 2 parts of polyvinylpyrrolidone, 1 to 2 parts of sodium alginate, 0.5 to 1 part of N-hydroxymethyl acrylamide, 0.5 to 1 part of nano-ceramic adhesive powder, 0.1 to 0.3 part of sodium gluconate, 0.1 to 0.3 part of L-calcium aspartate, 0.05 to 0.1 part of amino trimethylene phosphonic acid, and 100 to 200 parts of water. The water-based foaming pore regulator provided by the invention can generate loose, uniform and fine micropore structures, and increase the thickness retention rate of products, so that the water-based foaming pore regulator is favorable for improving the embossed effect, enables the decorative patterns to be remarked and convex, and not to be deformed, and enhances the rebound resilience, the air permeability and the moisture permeability of a polyurethane film.

The invention discloses a 3D curved glass efficient polishing disk and a preparation method thereof. The 3D curved glass efficient polishing disk is prepared from the following raw materials of, by weight, 45%-55% of polyurethane, 5%-15% of epoxy resin, 10%-15% of white corundum micro powder (W7), 5%-15% of ferric oxide, 5%-15% of cerium oxide powder and 0.5%-2% of foaming agents. According to the weight ratio, mixing and casting molding are conducted, the ultra-precise polished 3D curved glass soft foam elastic polishing disk with the Shore Hardness of 30-70 C is obtained. During polishing, the polishing disk only needs cooling water, a polishing solution does not need to be used, and thus high efficiency and environmental protection are achieved. Curved glass polished by the 3D curved glass elastic polishing disk prepared through the preparation method has high surface evenness, smoothness, light transmittance and precision and reaches the application standards of top grade mobile phone shells and other electronic products, and the advantages of high polishing efficiency and high yield are also achieved.

The invention relates to the technical field of battery diaphragm preparation, in particular to a battery diaphragm temperature control system of a rechargeable battery and a manufacturing method thereof, the system comprises a raw material pretreatment module, an extrusion module, a casting module, a heat treatment module, a stretching module, a detection module and a control module, the manufacturing method comprises the following steps: step s1, feeding and raw material pretreatment; step s2, extrusion molding of the mixture; s3, carrying out curtain coating treatment and cooling to form a base film; s4, carrying out heat transfer treatment on the base film to form a heat finishing film; and s5, stretching the thermal finishing film to form the microporous film. The detection module and the control module are arranged to detect and adjust the temperature in the manufacturing process of the battery diaphragm, so that the temperature in each technological process in the processing and manufacturing process can be accurately controlled, and the battery diaphragm is effectively processed according to the set temperature in the processing process; and it is ensured that the battery diaphragm forms a uniform microporous structure at the preset temperature.

The invention discloses a graphene lead-carbon battery positive grid and a preparation method thereof. The graphene lead-carbon battery positive grid comprises a lead grid green body and graphene lead plaster covering the surface of the lead grid green body, and the graphene lead plaster is prepared from the following raw materials in parts by weight: 750 to 820 parts of sponge lead, 10 to 14 parts of barium sulfate, 1.4 to 1.8 parts of graphene, 0.75 to 0.85 part of polyacrylonitrile-based carbon fiber, 0.9 to 1.2 parts of carboxylated carbon nanotube, 60 to 90 parts of waterborne polyurethane, 0.7 to 0.9 part of isocyanate, 80 to 95 parts of dodecanol, 40 to 50 parts of isoprene glycol and 0.2 to 0.3 part of polyoxyethylene lauryl ether. The graphene lead-carbon battery positive plate grid is high in charging acceptance and long in service life, is superior to a common lead-carbon battery positive plate grid, and is obviously superior to a common lead-acid storage battery positive plate.

The invention discloses a preparation method of a carbon-based composite adsorption material, which comprises the following steps: mixing pretreated kitchen waste, sewage plant sludge and rice hull powder, pretreating with hydrogen peroxide and sodium hydroxide, adding ferric trichloride and cationic polyacrylamide, conditioning, carrying out filter pressing dehydration, drying, and carrying out heat preservation and carbonization step by step to obtain the carbon-based composite adsorption material. According to the present invention, the common solid waste kitchen waste and sewage plant sludge in cities can be subjected to combined recycling treatment, and the prepared carbon-based composite adsorption material has excellent adsorption effect, and is especially suitable for the harmless treatment of phosphate-containing wastewater.

The invention provides a method for preparing a styrofoam. The method includes the following steps: preparing 100 parts by weight of pressure-sensitive adhesive; adding 0.5-2 parts by weight of an adhesion promoter, 0.1-1 part by weight of a wetting and dispersing agent, 0 .1-1 part by weight of thickener, 1-10 parts by weight of excipient, 10-30 parts by weight of filler, 10-50 parts by weight of water, 0.01-0.1 part by weight of tetramethylguanidine trifluoromethanesulfonate and 0.01-0.1 parts by weight of tetramethylguanidine lactate in the pressure-sensitive adhesive; adding the mixture in a foaming device commonly used in the field of styrofoam preparation, such as a foaming tank, a calender film suction foaming furnace, an extrusion lamination machine and a screw extruder; passing air through a microchannel reactor to the foaming device for foaming to obtain the styrofoam.

The invention discloses insulating mortar for buildings and a preparation method thereof, relating to the technical field of novel building materials. The mortar is prepared from the following raw materials: carbide slag, boric sludge, modified shale pottery sand, Zuoyun clay, sepiolite fibers, microcline powder, analcite powder, calcium nitrite, polydimethylsiloxane, dimethyl sulfoxide, woody sodium carbonate, dehydroacetic acid, a polyacrylate co-polymerized emulsion, a waterproof agent, an anti-freezing agent, a thickening time control agent and an air entraining agent. The preparation method comprises the following step of stirring, mixing and grinding raw materials. The insulating mortar for buildings is simple and convenient in preparation method, has the characteristics of being high in compressive strength, good in impact toughness and excellent in waterproof and anti-freezing property, is insulative and soundproof, weather-resistant and resistant to weather, long in service life and wide in application occasion, the safe reliability of the insulating mortar structural body for buildings is improved greatly, and the mortar is suitable for being popularized and applied.