1430 results about "Porous substrate" patented technology

A method of continuous 3D printing to print an article is provided. The method includes displacing a nozzle of the 3D printer in a nozzle displacement direction; extruding the ink from the nozzle concurrently with the displacement of the nozzle to form an extrudate on the porous substrate; and displacing the rotating magnetic field in the nozzle displacement direction simultaneously with the displacement of the nozzle. The ink includes a plurality of magnetically responsive particles and a colloidal gel. The colloidal gel may include fumed silica in an aqueous solution.

The present invention relates to a process for producing coated substrates. In the process, first at least one region of a surface of a porous substrate is provided with at least one surface sealing layer. At least one aqueous suspension is then applied onto the at least one surface sealing layer, the at least one aqueous suspension containing at least one refractory metal carbide and water. The substrate is then subjected to a sintering process. The present invention also relates to a coated substrate, which can be produced or is produced by the method according to the invention, and to the use of such a coated substrate.

The invention discloses a porous substrate reinforced anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The porous substrate reinforced anion exchange membrane is prepared by the following steps: uniformly mixing a polyarylene alkylene type cationic polymer solution and a C1-C10 alcohol solvent, then coating two sides of a porous substrate with the mixture, and drying to obtain the porous substrate reinforced anion exchange membrane. And removing the solvent to obtain the product. According to the method, the porous substrate can be well infiltrated by the cationic polymer solution without pre-treating the porous substrate, so that the porous substrate reinforced anion exchange membrane with a sandwich-like structure is obtained. The film has outstanding swelling resistance and excellent mechanical properties, has good electrochemical properties, and has good application prospects in alkaline film energy conversion devices.

The invention relates to the technical field of lithium ion battery diaphragms, in particular to a lithium ion battery diaphragm, a preparation method thereof and a lithium ion battery. The lithium ion battery diaphragm comprises a porous base material and an organic coating arranged on at least one surface of the porous base material, the material of the organic coating comprises a polymer, the organic coating comprises a plurality of dotted structures, and each dotted structure comprises an annular structure with at least one notch part and / or an island-shaped structure with at least one notch part; the maximum value of the height of the point-shaped structure is X, and the height of the notch part is smaller than or equal to 0.5 X. The organic coating of the diaphragm provided by the invention comprises the annular structure and / or the island-shaped structure with the notch part, and the notch part forms the breakpoint, so that the transmission of electrolyte inside and outside the bonding point can be realized, and the fast charging performance of the battery is greatly improved.

The invention discloses a preparation method and application of a polyamide composite nanofiltration membrane containing a graphdiyne middle layer, and belongs to the technical field of membrane separation. Comprising a porous substrate, a graphdiyne middle layer and a polyamide layer. The graphdiyne is selected from graphdiyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method comprises the following steps: carrying out suction filtration on graphdiyne dispersion liquid to a porous substrate, respectively dipping the graphdiyne dispersion liquid in a water phase and an oil phase, carrying out interfacial polymerization to generate a polyamide membrane, and finally, drying the membrane in a constant-temperature and constant-humidity drying oven to obtain the polyamide composite nanofiltration membrane containing the graphdiyne middle layer. The preparation method disclosed by the invention is simple and efficient, and the prepared composite membrane can effectively intercept divalent salt and organic matters in water and has excellent water permeability, ion separation and antibiotic desalination effects.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention relates to a battery and a preparation method thereof and an electric device, the battery comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, the positive plate comprises a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer comprises a first binder; the negative plate comprises a negative current collector and a negative active material layer arranged on the negative current collector, and the negative active material layer comprises a second binder; the diaphragm comprises a first coating, a porous base material and a second coating which are stacked in sequence, the first coating faces the positive electrode active material layer, the second coating faces the negative electrode active material layer, the first coating comprises a first binder, and the second coating comprises a second binder. In the battery, the binder in the diaphragm coating is consistent with the binder in the active material to which the coating faces, so that the problems of large pole piece deformation and poor pole piece interface flatness in the middle and later periods of battery circulation can be improved, and the cycle performance of the battery can be improved.

The invention provides a high-flux chlorine-resistant anti-pollution composite nanofiltration membrane and a preparation method and application thereof, and the preparation method comprises the following steps: immersing a porous base membrane into a water-phase monomer solution, taking out the porous base membrane, removing a surface solution, and immersing the porous base membrane into an organic-phase monomer solution to complete interfacial polymerization to obtain an initial polyamide active layer; immersing the prepared initial polyamide active layer in a mixed solution containing sodium lignin sulfonate, a surfactant and a catalyst to complete surface modification; and carrying out thermocuring on the prepared surface-modified polyamide active layer to obtain the high-flux chlorine-resistant anti-pollution composite nanofiltration membrane. The anti-pollution performance and water flux of the prepared composite nanofiltration membrane are obviously improved, the composite nanofiltration membrane is suitable for being used as drinking water terminal treatment, and softening and purification of drinking water are achieved.

A separation membrane that is an ultrapure water membrane; a food and / or beverage processing membrane; a municipal water membrane; a peel oil recovery membrane; a (bio) refinery dewatering membrane; an oily wastewater (pre-) treatment membrane; a metal extraction membrane; a desalination membrane; and / or a protein fraction membrane. The membrane includes a porous substrate layer and an active layer arranged over at least a part of the substrate layer. The active layer includes a hydrophilic agent and a superhydrophilic agent. Also described is a method of producing the separation membrane.

A pervaporation composite membrane belongs to the technical field of membrane separation. The pervaporation composite membrane comprises a porous substrate, a middle membrane layer and a separation membrane layer which are sequentially stacked, the average pore size of the porous substrate is greater than or equal to 250nm; the average pore size and porosity of the middle film layer are smaller than those of the porous substrate, and the middle film layer has the organic matter affinity characteristic; the separation membrane layer has the hydrophobic characteristic and the organic matter selective permeation characteristic. The middle membrane layer is beneficial to improving the problems of seepage holes, difficulty in spreading, uncontrollable thickness of the separation membrane layer and the like in the solid-liquid interface preparation process, ensures the defect-free preparation of the separation membrane layer, and is beneficial to improving the permeability of the pervaporation composite membrane to organic matters.

The invention relates to the technical field of membrane separation, in particular to a high-flux high-salt rejection rate reverse osmosis membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: sequentially contacting a porous base membrane with a water phase solution and an oil phase solution to generate an interfacial polymerization reaction to form a primary reverse osmosis membrane, and sequentially contacting the primary reverse osmosis membrane with a nitrous acid or salt solution thereof and a hydrosulfite solution to obtain the reverse osmosis membrane with high flux and high salt rejection rate, the water-phase solution contains a water-phase cosolvent, and the oil-phase solution contains an oil-phase cosolvent. According to the preparation method, cosolvents are creatively added into a water-phase solution and an oil-phase solution in an interfacial polymerization reaction process to regulate and control the microstructure of a polyamide layer, and a diazo reaction promotes further crosslinking of residual aniline groups, so that in-situ densification regulation and control of a polyamide network structure are realized; the trade-off effect of the water flux and the salt rejection rate of the traditional reverse osmosis membrane is successfully broken through.

This disclosure relates to the fabrication of high-performance thin film composite (TFC) reverse osmosis (RO) membranes comprising a thin polyamide rejection layer (thickness of 100-200 nanometer), a porous substrate including polysulfone (PSf) layer (thickness of 40-50 micron) cast on polyester nonwoven fabric (thickness of ˜100 micron). Hydrophilic and antibacterial TFC polyamide RO membranes were developed by incorporating green Lignin and nanostructured silver-based metal organic frameworks (MOFs) into the selective layer. The polyamide layer of TFC RO membranes was fabricated on the porous PSf substrate by interfacial polymerization between aqueous monomer solutions containing MPD, and adequate additives in water and organic monomer solutions containing TMC in the mixture of hexane and co-solvents. The optimized produced RO membranes were provided water flux of 95-100 LMH and sodium chloride (NaCl) salt rejection of 98.5-99.0% during filtration of 2000 ppm NaCl solution at 225 psi pressure, and water flux of 55-60 LMH and sodium chloride (NaCl) salt rejection of 98.6-98.9% during filtration of 35000 ppm NaCl solution at 800 psi pressure. This disclosure also relates to developing a roll-to-roll PSf membrane as a substrate for making TFC RO membranes for water desalination

The invention discloses an isolating membrane, a battery and a power utilization device, the isolating membrane comprises a porous base material and a coating arranged on at least one surface of the porous base material, the coating comprises fiber materials and granular filler, the fiber materials comprise a first fiber material and a second fiber material, the average length of the first fiber material is recorded as L1, and the average length of the second fiber material is recorded as L2; the average length of the second fiber material is recorded as L2, L1 is greater than 800nm, and L1 / L2 is greater than or equal to 2.4. According to the invention, the battery has high reliability and good cycle performance.

To provide a separator for a non-aqueous secondary battery which is excellent in thermal dimensional stability and adhesion to an electrode, and improves battery cycle characteristics and impact resistance.SOLUTION: A separator for a non-aqueous secondary battery includes a porous base material, a heat-resistant layer which is arranged on one side or both sides of the porous base material, and contains inorganic particles and a binder resin, and an adhesive layer which is arranged on one side or both sides of the laminate of the porous base material and the heat-resistant layer, and contains a polyvinylidene fluoride-based resin, wherein the mass ratio of the inorganic particles in the heat-resistant layer is 95 mass% or more, the average primary particle diameter of the inorganic particles contained in the heat-resistant layer is 0.01 μm to 0.30 μm, and the adhesive layer has a porous structure such that fibrils containing the polyvinylidene fluoride-based resin are connected to each other in three-dimensional meshes.SELECTED DRAWING: Figure 1

The invention discloses an inorganic atomic layer reinforced high-temperature-resistant nanofiltration membrane and a preparation method and application thereof, and belongs to the technical field of water treatment.The preparation method comprises the steps that firstly, a polymer porous basement membrane is modified through an atomic layer deposition technology, an inorganic atomic layer is introduced to the porous basement membrane, and the modified porous basement membrane is prepared; and performing interfacial polymerization reaction on a water-phase solution containing an amine monomer and a surfactant and an oil-phase solution containing a multi-acyl chloride monomer on the modified porous substrate membrane, and curing and cross-linking to prepare the inorganic atomic layer reinforced high-temperature-resistant nanofiltration membrane. According to the method, the thickness of the inorganic atomic layer can be accurately controlled, the mechanical strength and thermal stability of the porous basement membrane are improved, and the product high-temperature-resistant nanofiltration membrane has excellent high-temperature nanofiltration performance, water flux and long-term stability and is suitable for water treatment, ion screening and the like in a high-temperature environment.

A separator includes a porous substrate and a porous coating disposed on at least one surface of the porous substrate, the porous coating includes a polymer, and the polymer includes polymer particles. In a 130 μm×100 μm region on a surface of the porous coating, the number of the polymer particles with a maximum diameter in a range of 5 μm to 14 μm is 100 to 180. The separator has large-particle size polymer that can increase the interface gap at the corners of the electrochemical device. Thus, for the electrochemical device, the electrolyte at the corner interfaces can achieve good infiltration during the charge-discharge cycling process, effectively alleviating the corner purple / black spot problem of the electrochemical device.

The invention provides a silicon-based composite material, a preparation method thereof and a negative plate. The silicon-based composite material comprises silicon-based composite material particles, the silicon-based composite material particles comprise a porous substrate and silicon particles loaded in pores of the porous substrate, the silicon particles comprise at least one silicon nanoparticle and an oxygen-enriched layer at least partially coating the silicon nanoparticle, the oxygen-enriched layer is made of SiOx, x is more than 0 and less than or equal to 2, and x is more than 0 and less than or equal to 2. And the oxygen content in the oxygen-rich layer is in gradient change along the direction from the center to the surface of the silicon nanoparticle. According to the silicon-based composite material provided by the invention, the plurality of silicon particles taking the silicon nanoparticles as the core and the oxygen-enriched layer as the shell are loaded on the porous substrate, and the oxygen content in the oxygen-enriched layer is in gradient change, so that the conductivity of the silicon-based composite material is improved; moreover, the volume expansion of silicon in the lithium intercalation process can be relieved by utilizing the oxygen-enriched layer with the gradient change of the oxygen content, the expansion rate of the electrode is reduced, and the cycle performance of the battery is further improved.

The present disclosure relates to a separator, an electrode assembly including the same, and an electrochemical device, and the separator according to one embodiment of the present disclosure comprises a porous substrate and a porous coating layer on each of both surfaces of the porous substrate, the porous coating layer comprising inorganic particles, in which a total thickness of the separator remains constant throughout the separator, wherein an aspect ratio of the separator is 1 or more, and wherein an interface between each of the porous coating layers and the porous substrate has a curved shape protruding toward the porous substrate based on a width direction of the separator.

The invention belongs to the field of membrane materials, and particularly relates to a permeable membrane with a COF layer growing on the surface and a preparation method and application of the permeable membrane. According to the invention, aldehyde monomers are introduced into a membrane casting solution for blending, and a porous basement membrane with aldehyde groups on the surface is obtained through a phase inversion method; then, the aldehyde group porous substrate membrane is put into an acid reaction solution containing aldehyde monomers and sufficient amine monomers containing guanidine groups in an in-situ growth mode to obtain the porous permeable membrane with the multi-amino COF growing on the surface, the porous substrate guarantees good gas permeability, and the thin and compact surface also guarantees that the membrane does not leak liquid for a long time. In addition, enrichment of amino groups on the surface also promotes affinity of the material to carbon dioxide, and gas exchange in ECMO application is facilitated. In addition, the COF layer grown on the surface also improves the protein adhesion resistance of the porous basement membrane.

The present invention relates to a molybdenum precursor compound, a composition for forming a molybdenum-containing film comprising the same, a molybdenum-containing film formed using the same, and a method for forming a molybdenum-containing film. The molybdenum precursor compound has a single structure and high purity, and can therefore form a high-quality molybdenum-containing film, and has excellent thermal stability and low resistivity, and can therefore have various applications in the semiconductor field. In particular, the molybdenum precursor compound can form a film with excellent coating properties and uniformity even on a substrate with a pattern (groove) on the surface, a porous substrate, a plastic substrate, or a substrate with a complex shape, so that a high-quality molybdenum-containing film can be easily achieved.

Disclosed are a separator for a lithium secondary battery and a lithium secondary battery comprising same. The separator for a lithium secondary battery comprises: a porous substrate; and a coating layer disposed on at least one side of the porous substrate, wherein the coating layer contains heat-resistant organic particles, an organic heat-resistant binder, and an organic adhesive binder, wherein the heat-resistant organic particles have a thermal decomposition temperature of 150° C. or higher and a particle diameter of 100 nm to 300 nm, the organic heat-resistant binder is a first organic material having a glass transition temperature of 130° C. to 200° C., the organic adhesive binder is a second organic material having a glass transition temperature of −40° C. or lower, and the mixing weight ratio of the organic heat-resistant binder and the organic adhesive binder is 7:3 to 9:1.

In a microanalytical chip made up of a first porous substrate and a second porous substrate laminated on each other, a first channel chamber, a second channel chamber, and a first channel connecting the first channel chamber with the second channel chamber are formed by a channel wall in the first porous substrate, a reference electrode is disposed in the first channel chamber, a working electrode is disposed in the second channel chamber, the second porous substrate is disposed so as to overlap at least part of a region, where the working electrode is formed, on a surface of the first porous substrate.

The invention belongs to the technical field of nanofiltration, and provides a preparation method of a recrystallized silicon carbide-silicon carbonitride ceramic membrane. The preparation method comprises the following steps: applying a polysilazane solution to a porous substrate for the first time, and then performing first pyrolysis to obtain a pyrolysis material; and applying a polysilazane solution on the pyrolysis material for the second time, and then carrying out second pyrolysis to obtain the recrystallized silicon carbide-silicon carbonitride ceramic membrane. According to the invention, a solution containing propargyl polysilazane or organic polysilazane Durazane 1500 quick-drying resin is used as a precursor to prepare the ceramic membrane, and the ceramic membrane has the advantages of high ceramic yield, excellent high-temperature stability, high retention rate and controllable microstructure, and is suitable for separation and protection application in extreme environments.

Disclosed herein are methods, and compositions produced using the methods, including introducing porous substrate particles and a first reagent comprising a polymer to a solvent to provide a plurality of coated particles; and introducing a second reagent comprising a polymeric amine and a third reagent comprising a silane moiety and an amine moiety to the coated particles, thereby providing a plurality of functionalized, coated particles.

The invention relates to the field of fuel cells, and particularly discloses a gas diffusion layer, a preparation method thereof and a proton exchange membrane fuel cell applying the gas diffusion layer, and the preparation method of the gas diffusion layer comprises the following steps: preparing porous substrate layer carbon paper; performing hydrophobic treatment on the porous substrate layer carbon paper to obtain hydrophobic carbon paper; a hydrophobic agent and water are mixed to obtain hydrophobic slurry A, conductive powder, a surfactant, a binder and an organic solvent are mixed and dispersed to obtain conductive powder slurry B, the hydrophobic slurry A and the conductive powder slurry B are mixed to form spraying slurry C, the spraying slurry C is sprayed on hydrophobic carbon paper while being stirred, drying and curing are conducted after spraying, and a microporous layer is formed. A gas diffusion layer is obtained; the invention further discloses the gas diffusion layer prepared by adopting the method and the proton exchange membrane fuel cell applying the gas diffusion layer. The application has the characteristics of solving the problems of dispersion uniformity of the conductive powder in the slurry and sedimentation in the coating process, improving the quality of the microporous layer and further improving the performance of the fuel cell.

The invention provides an atomizing core, a preparation method thereof and an atomizer. The atomizing core comprises a porous base body which is provided with an atomizing surface and is used for guiding an atomizing medium to the atomizing surface; the heating element is arranged on the atomizing surface of the porous substrate, and at least one surface of the heating element is provided with a microstructure. According to the atomizing core, the liquid supply speed is increased, the risk of scaling of the atomizing core is reduced, and the atomizing efficiency and the smoking taste are improved.

A gas separation membrane for separating carbon dioxide includes: a separation layer formed of a polymer material and having a function of selecting and separating carbon dioxide; and a porous substrate including a first porous layer and a second porous layer. The gas separation membrane has a layer thickness T1 of 0.1 μm or more and 10.0 μm or less, an average pore diameter d1 of 10 nm or more and 10,000 nm or less, an aperture ratio A1 of 40% or more and 80% or less, a maximum height roughness R1 of 1 nm or more and 200 nm or less, a layer thickness T2 of 10 μm or more and 1,000 μm or less, a ratio d2 / d1 of an average pore diameter d2 to the average pore diameter d1 of 1.1 or more and 10,000 or less, and a ratio A2 / A1 of an aperture ratio A2 to the aperture ratio A1 of 1.1 or more and 2.0 or less.

The present application relates to the technical field of electronic atomization devices, and relates in particular to an atomization core, an atomizer, and an electronic atomization device. The atomization core provided in the present application comprises a porous substrate, a heating element, and a transition layer bonded between the porous substrate and the heating element. The transition layer contains an inorganic material component. The atomization core provided in the present application has excellent service life, and avoids issues such as dry burning.

A porous substrate includes a continuous graphitic phase, and a glass and / or ceramic phase. The graphitic phase and the glass and / or ceramic phase together form a continuous interconnected pore structure. A total pore volume of the porous substrate is at least 40% as determined by mercury porosimetry. The porous substrate is conductive to electricity. A method of forming a porous substrate includes extruding, drying, and firing an extruded extrudable composition that includes a binder and / or sintering aid.

The invention discloses a micro-conductive polyimide coating diaphragm with an energy slow release function, the micro-conductive polyimide coating diaphragm comprises a porous base material and a composite coating coated on at least one side of the porous base material, the composite coating comprises the following components: a polyimide matrix and modified carboxylated carbon nanotubes, and the modified carboxylated carbon nanotubes are uniformly dispersed in the polyimide matrix; the porosity of the composite coating ranges from 40% to 60%, the average pore size ranges from 0.1 micrometer to 0.5 micrometer, the pore size is distributed in a gradient mode in the thickness direction, the pore size of the surface layer is smaller than or equal to 0.2 micrometer, and the pore size of the bottom layer is larger than or equal to 0.4 micrometer. The invention also discloses a preparation method of the micro-conductive polyimide coating diaphragm with the energy slow release function. Flame retardance is achieved through a gas phase-condensation phase synergistic mechanism, a three-dimensional conductive network is constructed, performance conflicts are avoided through in-situ polymerization chemical bonding, and dendrite blocking and ion transmission efficiency are both considered through gradient aperture design. And through the one-step spraying and thermocuring process, uniform attachment of the submicron coating is achieved, and the process is simplified.