1016 results about "Porous substrate" patented technology

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 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.

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 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 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 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 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.

A scleral space implant for implantation in a scleral space includes a singular porous substrate having a top surface and an opposing bottom surface defining an implant interior and a consistent implant thickness disposed uniformly between the opposing top and bottom surfaces. The substrate has an implant rigidity that maintains the implant thickness when the scleral space implant is disposed in the scleral space. The top and bottom surfaces of the substrate each have a tissue-inhibiting pore structure that inhibits an ingress of ingrowing tissue into the implant interior while permitting the inflow of the aqueous humor into the implant interior. The implant interior has a coupled pore structure that facilitates a passage of the aqueous humor inflow through the implant interior.

An object is to provide a micro-analysis chip in which a satisfactory area of contact between a specimen and an ion-selective membrane and an adequate amount of the specimen that reacts with the ion-selective membrane can be secured, and which is excellent both in measurement sensitivity and in ion selectivity. In order to achieve the object, a micro-analysis chip as described below is provided. That is, provided is a micro-analysis chip including a channel region which is surrounded by a channel wall provided inside a porous substrate. The channel region includes a first channel chamber containing a reference electrode, a second channel chamber containing a working electrode. The working electrode is covered with an ion-selective membrane containing an ingredient that has ion selectivity. The ion-selective membrane has an exposed surface serving as a dispensing section to which a specimen is dispensed.

Examples of the present disclosure relate to a separator for a rechargeable lithium battery, and a rechargeable lithium battery including the separator. The separator for a rechargeable lithium battery includes a porous substrate and a coating layer located on at least one surface of the porous substrate. The coating layer includes a heat-resistant layer including a binder and a filler, and an adhesive layer including an adhesive binder located on the heat-resistant layer, the binder includes a (meth)acryl-based binder including a first structural unit derived from (meth)acrylic acid or a derivative of (meth)acrylic acid, a second structural unit derived from hydroxyalkyl (meth)acrylate, and a sulfonate group-containing third structural unit. The filler includes a cubic filler having a particle diameter D50 ranging from about 50 nm to about 250 nm, and the adhesive binder includes a cross-linked (meth)acryl-based adhesive binder.

Disclosed are a separator for a secondary battery, and a secondary battery including the same, the separator including a porous substrate, an inorganic layer located on at least one side of the porous substrate, and an adhesive layer located on the inorganic layer, wherein the adhesive layer includes first vinylidene fluoride-based polymer particles and second vinylidene fluoride-based polymer particles, having different solation temperatures.

The invention discloses a protein / polyphenol composite nanofiltration membrane and application thereof, and belongs to the technical field of protein membrane separation. The nano-filtration membrane is formed by modifying an amyloid-like protein film with the thickness of 50-300 nm and the average pore size of 0.4-1 nm by polyphenol and then adhering the amyloid-like protein film to a porous base material, wherein the amyloid-like protein film is formed by unfolding and self-assembling protein under the action of a modifier. The nanofiltration membrane disclosed by the invention can realize efficient selective separation of Mg < 2 + > / Li < + > in salt lake brine with a high magnesium-lithium ratio, has selective separation capacity on mixed anions Cl <-> / SO4 < 2->, can effectively remove heavy metal ions and perfluoro / polyfluoroalkyl compounds in water, and provides an important basis for developing a sustainable and high-performance next-generation membrane separation technology.

To provide a separator for a non-aqueous electrolyte secondary battery with excellent electrolyte retention.SOLUTION: The separator for a non-aqueous electrolyte secondary battery according to the present disclosure includes a polyolefin porous substrate and a heat-resistant layer stacked on top of the polyolefin porous substrate. For the separator for a non-aqueous electrolyte secondary battery, a DSC curve is obtained with a heating rate of 10°C / min, where the horizontal axis represents heating time [s] and the vertical axis represents heat flow [W / mg]. The total heat absorption, obtained by integrating the time region corresponding to the temperature range of 85°C to 230°C, enclosed by the DSC curve and a baseline, is 2.0 J / mg or less.SELECTED DRAWING: None

The present invention belongs to the technical field of separation composite membranes, and specifically relates to a preparation method and application of an LDH nano-network assisted polyamide nanofiltration membrane. The preparation method of the LDH nano-network assisted polyamide nanofiltration membrane comprises the following steps: (1) regionally coating a porous substrate membrane with a coating; (2) obtaining a precursor solution, and then immersing the porous substrate membrane in the precursor solution for reaction to obtain an LDH membrane; (3) cleaning and soaking the LDH membrane with an organic solvent, and drying the LDH membrane to obtain a dried LDH membrane; (4) under vacuum conditions, immersing the dried LDH membrane in a mixed aqueous solution of piperazine and LDH nanosheets, filtering with suction, and drying to obtain an LDH network membrane; (5) immersing the LDH network membrane in a solution of trimesoyl chloride in n-hexane for polymerization reaction, washing and drying to obtain an LDH nano-network assisted polyamide nanofiltration membrane. The nanofiltration membrane obtained by the present invention has a large water flux and a high rejection rate, and can be widely used in the field of water treatment.

The invention belongs to the technical field of membrane separation, and discloses an organic metal armored MXene membrane and preparation and application thereof.The preparation method comprises the steps that S1, lithium salt and an acid solution are mixed, a three-dimensional layered MAX raw material is added, stirring, centrifugal washing, ultrasonic treatment and centrifugation are conducted, and a two-dimensional MXene nanosheet dispersion liquid is obtained; and S2, adding an organic metal salt into the two-dimensional MXene nanosheet dispersion liquid, carrying out stirring reaction to carry out organic metal salt modification on MXene nanosheets, and carrying out vacuum filtration or blade coating or spin coating on a porous substrate with a modified MXene nanosheet colloidal solution to obtain the organic metal armored MXene film. MXene is modified through organic metal, interaction between solvent molecules and the MXene membrane is weakened and interlayer spacing and solvent mass transfer behavior are regulated and controlled by means of stable combination of the organic metal and the MXene, so that separation performance and swelling resistance are remarkably improved, and the technical problems that a traditional MXene membrane material is large in swelling and mass transfer resistance, low in separation efficiency and the like are solved.

According to an aspect of the present invention, there is provided a method for manufacturing a secondary battery, the method including: preparing an electrode assembly in which electrodes and a separator are alternately laminated, and an adhesive is applied to the surface of at least one among the electrodes and the separator, thereby allowing the electrodes and the separator to adhere to each other; accommodating the electrode assembly in a battery case; injecting a gel polymer electrolyte composition into the battery case to impregnate the electrode assembly with the gel polymer electrolyte composition; and curing the gel polymer electrolyte composition, wherein the adhesive includes a first oligomer compound, the separator includes a porous substrate and ceramic coating layers disposed on both surfaces of the porous substrate, the ceramic coating layers include 92-100 wt % (exclusive of 100) of inorganic particles and 0-8 wt % (exclusive of 0) of a binder, and the gel polymer electrolyte composition includes a lithium salt, an organic solvent, a polymerization initiator, and a second oligomer compound.

The present invention relates to a porous composite structure catalyst comprising a porous substrate and a catalyst coating layer, wherein the catalyst coating layer comprises: a porous support including meso-pores; and a composite catalyst, which is gold nanoparticles impregnated into pores of the porous support.

The invention relates to a separator and an electrochemical device comprising the same. According to one aspect of the present invention, there is provided a separator comprising: a porous substrate; the present invention relates to a porous film comprising a porous substrate, and an inorganic particle layer on one or both surfaces of the porous substrate, and comprising inorganic particles and an inorganic binder, in which the inorganic particle layer comprises an organic compound in an amount less than the amount of the inorganic binder, and the inorganic binder comprises a metal silicate.

The invention provides a two-dimensional layered kaolinite nanofiltration membrane, and a preparation method and application thereof, and the preparation method comprises the following steps: mixing kaolinite powder and an intercalator according to a first solid-to-liquid ratio, heating, stirring, carrying out intercalation reaction completely, and carrying out solid-liquid separation to obtain a solid kaolinite intercalation compound; mixing the kaolinite intercalation compound with water according to a second solid-to-liquid ratio, adjusting the pH value of the mixed solution to 9-13, and carrying out dispersion treatment to obtain a kaolinite nanosheet dispersion liquid; enabling the kaolinite nanosheet dispersion liquid to penetrate through the porous basement membrane, and depositing kaolinite nanosheets in the kaolinite nanosheet dispersion liquid on the porous basement membrane to obtain the two-dimensional layered kaolinite nanofiltration membrane; the operation steps are simple, no complex equipment or a large amount of organic solvent is used, and the method conforms to the concept of green chemistry. The prepared two-dimensional layered kaolinite nanofiltration membrane can be used in various fields of water treatment, organic solvent separation and the like, and has a wide application prospect.

A membrane electrode for the preparation of hydrogen peroxide by means of oxygen reduction, a preparation method therefor, and a membrane electrode reactor. The membrane electrode comprises a cathode oxygen reduction electrode, a cation exchange membrane and an anode oxygen evolution electrode, which are stacked, wherein the cation exchange membrane is located between the cathode oxygen reduction electrode and the anode oxygen evolution electrode, and every two of the cathode oxygen reduction electrode, the cation exchange membrane and the anode oxygen evolution electrode are physically connected; the cathode oxygen reduction electrode comprises a cathode porous substrate layer and a cathode active layer, the cathode active layer comprising a cathode catalyst and a cation regulating and controlling material; and the anode oxygen evolution electrode comprises an anode porous substrate layer and an anode active layer, the anode active layer comprising an anode catalyst. The membrane electrode is suitable for the preparation of hydrogen peroxide by means of oxygen reduction, and has good hydrogen peroxide selectivity and high Faraday efficiency.

A food quality indicator including an ink layer configured to detect and indicate the presence of analytes, such as volatile organic compounds (VOC), an adhesive layer, wherein the adhesive layer is a double-sided adhesive layer, and a semi-permeable layer that is permeably to gases and impermeable to liquids. The ink layer including of a reactive ink absorbed on a porous substrate and is enclosed between the adhesive layer and the semi-permeable layer. The semi-permeable may further include a coated protective layer configured to prevent the migration of ink from the ink layer. A method for preparing the ink and the protective layer of the food quality indicator as well as the food quality indicator are provided.