424 results about "Porous composite" patented technology

The invention relates to a fly ash-based MOFs adsorption-catalysis material integrated preparation method, and belongs to the field of solid waste treatment and resource utilization. The material takes industrial solid waste fly ash as a matrix, and is prepared by the following steps: firstly, carrying out alkali modification and silane coupling agent surface activation treatment on fly ash to form a high-activity matrix; then loading a metal organic framework (MOFs) on the surface of the activated fly ash through an in-situ synthesis process to form a porous composite carrier; the integrated material with CO2 adsorption and catalytic conversion functions is further prepared through impregnation of a copper-based active component and a high-temperature calcination process. According to the invention, the problems of high energy consumption, high cost and low comprehensive utilization rate of fly ash of the traditional CO2 capture and utilization technology (ICCU) are solved, high-valued resource utilization of industrial solid waste and efficient capture and conversion of CO2 are synchronously realized, and the method has dual values of environmental protection and economy.

The invention relates to the technical field of batteries, in particular to a porous composite diaphragm, a preparation method thereof and a secondary battery. The porous composite diaphragm comprises a base membrane, a first coating and a second coating, the first coating and the second coating are oppositely arranged on the two surfaces of the base film; the first coating layer and the second coating layer comprise a copolymer containing a first monomer unit and a second monomer unit; the first monomer unit contains a cyano group on a side chain, and the second monomer unit contains a carbonyl group on a side chain; in the copolymer, the molar ratio of the second monomer unit is 1-20%; the first coating and the second coating comprise skeleton structures and first-class pore structures formed between the skeleton structures, and second-class pore structures are formed on bodies of the skeleton structures; and the average pore diameter of the first-type pore structure is greater than that of the second-type pore structure. According to the porous composite diaphragm, the lithium ion conductivity can be improved while the bonding performance with a pole piece is improved.

The invention provides an aerogel-based porous composite material for sewage treatment and a preparation method and application thereof.The preparation method comprises the steps that a nanocellulose solution and a cobalt source solution are mixed to obtain a precursor solution, and under the stirring and heating conditions, an organic ligand solution is dropwise added into the precursor solution to obtain a reaction solution; uniformly mixing the reaction solution with polyvinyl alcohol, injecting the mixture into a mold, and performing directional freezing to obtain an aerogel matrix; and carrying out hydrophobic modification on the aerogel matrix. Through the synergistic effect of the nanocellulose skeleton and the ZIF-67 crystal, and in combination with a hierarchical porous structure constructed by directional freezing, efficient synergism of physical adsorption and chemical catalysis is realized, so that the material shows an excellent removal effect on dyes, hydrocarbon pollutants and heavy metal ions in complex water bodies such as printing and dyeing wastewater and petrochemical wastewater in a wide pH range (pH = 3-11).

The invention discloses a potassium ferrate composite environmental remediation material as well as a preparation method and application thereof. The material comprises the following components in percentage by weight: 40-70% of potassium ferrate; 20-50% of a porous carrier; and 5-10% of a stabilizer. The preparation method comprises the following steps: S1, potassium ferrate synthesis: synthesizing potassium ferrate under the action of an auxiliary catalyst by adopting a sodium hypochlorite oxidation method; s2, modifying a porous carrier: activating the porous carrier with acid, soaking the porous carrier in a stabilizer solution, and drying for later use; and S3, composite loading: mixing the potassium ferrate powder and the porous carrier in proportion, then adding a binder, carrying out ball milling, then carrying out tabletting molding, and then carrying out calcination in an inert atmosphere to obtain porous composite particles, namely the environmental remediation material. The composite structure delays decomposition of potassium ferrate, and the validity period of the material is prolonged to 6 months or above. The porous carrier provides adsorption sites and cooperates with the oxidation-adsorption effect to improve the pollutant removal rate. The calcining process enhances the mechanical strength of the material, and is suitable for flowing water or deep soil injection.

The invention provides a microbial slow-release porous composite material for sewage treatment as well as a preparation method and application thereof. The preparation method comprises the following steps: dropwise adding an organic ligand solution into a precursor solution consisting of a nanocellulose solution and a cobalt source solution; mixing the reaction solution with polyvinyl alcohol, injecting the mixture into a mold, and performing directional freezing to obtain an aerogel matrix; carrying out hydrophobic modification on the aerogel matrix to obtain a modified aerogel matrix; mixing the microbial suspension with sodium alginate, and homogenizing at high pressure to obtain a gel precursor emulsion; the preparation method comprises the following steps: dropwise adding a calcium chloride solution to gelatinize to obtain gel particles, and then cross-linking and drying by glutaraldehyde to obtain sustained-release capsule particles; dispersing the sustained-release capsule particles in deionized water to obtain dispersion liquid; and dipping the modified aerogel matrix in the dispersion liquid. An aerogel matrix with a hierarchical porous structure is compounded with a sustained-release capsule with a pH response mechanism, so that physical adsorption, chemical catalysis and biodegradation for sewage treatment are realized.

The invention provides a photocatalytic porous composite material for sewage treatment and a preparation method and application thereof, and the preparation method comprises the following steps: dropwise adding an organic ligand solution into a precursor solution composed of a nano cellulose solution and a cobalt source solution, mixing a reaction solution with polyvinyl alcohol, injecting the mixture into a mold, and carrying out directional freezing to obtain an aerogel matrix; carrying out hydrophobic modification on the aerogel matrix to obtain a modified aerogel matrix; the preparation method comprises the following steps: dissolving tetrabutyl titanate and cetyltrimethylammonium bromide in absolute ethyl alcohol, stirring and heating to obtain precursor sol, adding a ferric nitrate solution into the precursor sol for hydrothermal reaction, and filtering and calcining after the reaction is finished to obtain doped titanium dioxide particles; and dispersing the doped titanium dioxide particles in deionized water to obtain a dispersion liquid, and dipping the modified aerogel matrix. According to the invention, a composite material composed of a nanocellulose / ZIF-67 composite aerogel matrix and doped titanium dioxide particles is constructed, and efficient sewage treatment of adsorption-catalysis-regeneration cycle is realized.

The present invention relates to a porous composite feedstock for metal chloride preparation, comprising a metal oxide containing material,; and / or a first additive; and a binder; wherein the porous composite feedstock is in particulate form; wherein the water content of the porous composite feedstock is in the range of from 0.01 to 5 wt.% based on the weight of the porous composite feedstock; and wherein the porous composite feedstock has a poured bulk density in the range of from 0.2 g / cm3 and 2.0 g / cm3.

The invention provides a silicon carbide-diamond porous composite material as well as a preparation method and application thereof. The silicon carbide-diamond porous composite material comprises diamond particles coated with silicon carbide layers, and the adjacent diamond particles coated with the silicon carbide layers are connected through silicon carbide or silicon carbide and silicon to form a three-dimensional continuous silicon carbide-diamond network and an interpenetrating porous pore network; the silicon carbide-diamond composite porous material comprises the following components in volume fraction: 50%-90% of diamond particles, 10%-50% of silicon carbide and 0%-20% of silicon. The material has high thermal conductivity (the highest thermal conductivity is 800W / m.K) and high strength (the bending strength reaches 200MPa), and is suitable for the fields of heat dissipation of electronic devices, high-end equipment and the like.

The invention belongs to the technical field of repairing refrigeration spraying materials, and particularly discloses a daytime passive radiation refrigeration polyurea composite spraying material with a structure repairing function and a preparation method of the daytime passive radiation refrigeration polyurea composite spraying material. And preparing the spraying material with certain flowability. The porous composite polyurea repairing radiation refrigeration spraying material is synthesized by utilizing the multi-graded micron hollow glass beads, has a multi-stage pore structure, and can optimize the pore size grading, so that the spraying material has high daytime radiation refrigeration power and excellent structure repairing capability at the same time.

The invention provides a porous composite solid electrolyte membrane as well as a preparation method and application thereof, and belongs to the technical field of solid electrolyte materials. According to the porous composite solid-state electrolyte membrane provided by the invention, the three-dimensional porous fiber membrane constructed by the modified nanofibers is used as a framework of the porous composite solid-state electrolyte membrane, so that the interface bonding capacity of the modified nanofibers, the inorganic solid-state electrolyte powder and the membrane-forming polymer can be improved; further, the porous composite solid electrolyte membrane has excellent mechanical properties such as flexibility; the inorganic solid electrolyte powder is uniformly dispersed in the three-dimensional porous fiber membrane, the porous network structure can provide more lithium ion transmission channels, the ion migration rate is improved, and the conductivity of the porous composite solid electrolyte membrane is improved; the porous composite solid-state electrolyte membrane provided by the invention comprises the flame-retardant plasticizer, and the membrane-forming polymer and the flame-retardant plasticizer are compounded to improve interface contact, so that the mechanical property of the porous composite solid-state electrolyte membrane is improved.

The invention relates to a cell comprising: - An anode comprising a lithium metal layer, - An electrolyte comprising at least one lithium salt and at least one solvent, - A cathode comprising a porous composite layer which comprises at least one active material.

The invention relates to the technical field of sound absorption composite materials, in particular to a porous composite material capable of enhancing sound absorption performance and a preparation method and application of the porous composite material capable of enhancing the sound absorption performance. And high-efficiency sound absorption can be realized in the full frequency band of 100Hz-6000Hz. Especially in the low-frequency band of 200Hz-1000Hz, the sound absorption coefficient is increased by 20%-50% compared with that of a traditional porous material with similar thickness and weight, and the problem that the traditional material is insufficient in low-frequency sound absorption is solved.

The invention discloses a method and a system for predicting the tensile strength of a low-temperature wet saturated porous composite material laminated plate, and belongs to the technical field of civil aviation composite material design and evaluation, the method for predicting the tensile strength of the low-temperature wet saturated porous composite material laminated plate comprises the following steps: S1, estimating the tensile strength of the porous composite material laminated plate based on a stress field intensity method; s2, introducing a Tsai equation to fit a function relationship between the mechanical property parameters and the temperature and humidity environment parameters of the porous composite material; and S3, importing different temperature and humidity environment parameters into the function relationship to obtain the tensile strength of the porous composite material laminated plate in different temperature and humidity environments. On the basis of engineering estimation of the tensile strength of the porous composite material laminated plate based on a stress field intensity method, a Tsai equation is introduced to fit a function relationship between mechanical property parameters of a composite material and a temperature and humidity environment; and an engineering estimation technical scheme capable of predicting the tensile strength of the moisture-absorption saturated porous composite material laminated plate in the low-temperature environment is established.

The invention discloses a coated defluorination composite material based on a microbial mineralization technology and a preparation method thereof. According to the coated defluorination composite material, urease vaterite calcium carbonate particles are used as a material core part, and the outer surface of the core part is coated with a calcium cross-linked porous composite film to serve as a coating layer of the material; the calcium cross-linked porous composite membrane is a porous membrane material formed by cross-linking calcium ions and a porous matrix, and the porous matrix is selected from any one of chitosan, cellulose, sodium alginate and porous silicon; the urease vaterite calcium carbonate particles are generated in situ after urea hydrolysis is catalyzed by urease and a calcium source is added. The composite material has the advantages of efficient defluorination effect and good stability when used in fluorine-containing wastewater, and the preparation method of the coated defluorination composite material is simple and easy to implement.

The invention provides a catalytic material, a preparation method thereof and application of the catalytic material in high-purity ethyl aliphatic amine, and belongs to the technical field of fine chemical engineering. The catalytic material provided by the invention has a porous structure, so that the specific surface area of the catalytic material can be remarkably increased, more active sites can be used for contact between reaction raw materials and a catalyst, the reaction process is accelerated, meanwhile, the retention time of the reaction raw materials on the surface of the catalyst is prolonged by the porous structure, and the conversion rate of the reaction raw materials (liquid ammonia) is further improved; active components are loaded on the surface of the AB2O4 type porous composite transition metal oxide, so that the number of active sites can be further increased, and the conversion rate of liquid ammonia is further improved. Results of the embodiment show that when the catalytic material provided by the invention is used for preparing ethyl aliphatic amine by an ethanol catalytic amination method, the conversion rate of liquid ammonia is 95% or above.

The invention particularly relates to an MXene and halide solid electrolyte composite modified lithium manganese iron phosphate material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. According to the invention, the surface of lithium manganese iron phosphate is coated with halide solid electrolyte to prepare porous composite particles, and then the porous composite particles are deposited on the surface of a few-layer Ti3C2Tx MXene material through electrostatic interaction under the action of a cationic surfactant, so that the MXene and halide solid electrolyte composite modified lithium manganese iron phosphate material is prepared. The problems of diffusion of lithium ions, generation and deposition of divalent manganese ions and the like of existing lithium manganese iron phosphate are effectively solved, the service life of the battery is prolonged, and the method has a wide application prospect.

The invention provides a porous composite current collector and a preparation method thereof, the porous composite current collector comprises a base film layer and a conductive layer arranged on the surface of the base film layer, the conductive layer comprises a conductive material, the base film layer comprises a high-molecular polymer, the base film layer is provided with a plurality of through holes, and the through holes are communicated with the conductive material. And a blocking part for preventing magnetron sputtering pollution is arranged in the through hole. By effectively optimizing the composition and the preparation process of the porous composite current collector, the sheet resistance of the porous composite current collector is reduced, and the situation that a conductive material is hit onto a sputtering back roller through vertical holes to cause back roller pollution is avoided, so that the porous composite current collector has high conductivity and high compression strength, and the binding force of a conductive layer and a base film layer is improved.

According to one embodiment, provided is a carbon dioxide absorption-release device including a pair of electrodes, an aqueous electrolyte, a first electrolyte flow path, and a second electrolyte flow path. Each of the pair of electrodes include a porous composite, where the porous composite contains an electro-conductive component and a porous material on the electro-conductive component, and the porous material includes a reactive moiety for electrochemical proton transfer. In the first electrolyte flow path, one of the pair of electrodes contacts the aqueous electrolyte. In the second electrolyte flow path, the other of the pair of electrodes contacts the aqueous electrolyte.

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 present invention discloses a preparation method of a carbon-rich coal gasification slag-based iodine-doped C / SiO x composite lithium battery anode material, belonging to the field of lithium battery anode materials; First, the present invention uses a nitric acid solution to pretreat the carbon-rich coal gasification slag to remove metal impurities and obtain a solid residue; Then, the pore channels of the solid residue are modified and reformed by chemical activation to prepare a porous C / SiO x composite material; Finally, iodine (I2) is deposited on the surface and inner pore walls of the porous C / SiO x composite material by fumigation to finally obtain the anode material.

The present application relates to the technical field of negative electrode materials of batteries, and in particular relates to a porous composite elastomer and silicon-carbon, and preparation methods therefor and the use thereof. The present application provides a porous composite elastomer, which is of a porous structure, and comprises a flexible body and a rigid body, which are interpenetrating, wherein the raw material of the flexible body comprises carbon nanotubes, and the rigid body comprises hard carbon. In the present application, a silicon-carbon composite material is prepared by using carbon nanotubes and hard carbon as carbon sources and compounding same with silicon; and compared with a conventional silicon-carbon composite material, the carbon nanotubes, serving as a bridge between the silicon and the hard carbon, can effectively improve the conductivity and the ion conducting energy, thereby improving the rate capability of a negative electrode material.

The corundum-silicon carbide-mullite castable is prepared from sintered mullite particles, silicon carbide fine powder, activated aluminum oxide micro powder, silicon dioxide micro powder, composite rare earth oxide fine powder, aluminum titanate fine powder, a binding agent, a water reducing agent, explosion-proof fibers and porous composite corundum-silicon carbide particles. The porous composite corundum-silicon carbide particles are formed by sintering fused corundum particles and nano silicon carbide powder through in-situ reaction, micron-sized pore channels which are communicated with one another are formed in the porous composite corundum-silicon carbide particles, and the surfaces of the particles are coated with a compact mullite-corundum complex phase layer, so that thermal stress can be effectively buffered, and permeation of zinc and alkali vapor can be blocked; the low thermal expansion characteristic of aluminum titanate and the grain boundary purification effect of rare earth oxide are matched, thermal shock resistance and erosion resistance are synergistically improved, and excellent thermal shock resistance, chemical erosion resistance, high strength and wear resistance are shown under the harsh working condition of the zinc oxide rotary kiln.

The invention discloses a cellulose-based polyvinylidene fluoride porous composite piezoelectric material and a preparation method and application thereof, and belongs to the technical field of piezoelectric material preparation. The preparation method of the cellulose-based polyvinylidene fluoride porous composite piezoelectric material provided by the invention comprises the following steps: dissolving cellulose in a pre-cooling solvent system, and carrying out gel treatment to obtain cellulose hydrogel; performing solvent exchange on the cellulose hydrogel, and performing primary freeze drying to obtain cellulose aerogel; and soaking the cellulose aerogel in a PVDF solution, inducing PVDF regeneration treatment by using a non-solvent, and carrying out secondary freeze drying to obtain the cellulose-based polyvinylidene fluoride porous composite piezoelectric material. The composite piezoelectric material prepared by the invention can induce generation of a polyvinylidene fluoride beta crystal phase, so that the piezoelectric property of the composite material is greatly improved, meanwhile, the flexibility is greatly improved, and the composite piezoelectric material has a wide application prospect in flexible piezoelectric sensors.

The invention relates to the technical field of drying agents, in particular to a porous composite gel drying agent and a preparation method thereof. Conventional desiccants are difficult to give consideration to both stable chemical properties and high moisture absorption capacity. In order to solve the problems, the porous composite gel drying agent is provided, lithium chloride, calcium chloride and other hygroscopic salts are introduced to serve as additives in a porous polymerization network of the drying agent and are compounded with the polymer network, and the intrinsic moisture absorption capacity of the material is remarkably improved. The moisture absorption capacity of the obtained porous composite gel drying agent is far higher than that of traditional silica gel, the long-acting moisture absorption requirement in the high-humidity environment can be met, and the porous composite gel drying agent is particularly suitable for the high-end fields of precision electronics, new energy batteries, biological agents and the like with strict requirements for humidity control precision.

The invention belongs to the field of silicon-carbon negative electrode materials, and particularly relates to a preparation method of a silicon-carbon negative electrode material and a silicon-carbon negative electrode semi-solid-state battery. The preparation method of the silicon-carbon negative electrode material comprises the following steps: grinding and mixing nano silicon and asphalt, and carbonizing to obtain amorphous carbon layer coated silicon particles; performing chemical vapor deposition of a carbon layer on the amorphous carbon layer coated silicon particles, and etching by using a ferric chloride solution to form porous composite carbon layer coated silicon particles; and annealing the porous composite carbon layer coated silicon particles in a nitrogen-containing atmosphere to form the nitrogen-doped silicon carbon negative electrode material. The nitrogen-doped porous composite carbon layer silicon-carbon negative electrode material is prepared through the links of amorphous carbon coating of silicon particles, chemical vapor deposition of a carbon layer, etching of a porous structure, nitrogen doping and the like, volume expansion of silicon can be effectively inhibited, and the cycling stability is improved. In addition, the capacity of the silicon-carbon negative electrode can be improved to 1500-1800 mAh / g, and great benefits are also brought to improvement of the energy density of the battery.

The invention discloses a porous composite polymer solid electrolyte, a preparation method thereof and a solid sodium ion battery. The porous composite polymer solid electrolyte is prepared from a deep eutectic solvent, an additive, a polymer solution and a sodium super-ion conductor, the deep eutectic solvent is composed of a sodium ion-containing hydrogen bond receptor and a hydrogen bond donor, wherein the sodium ion-containing hydrogen bond receptor is selected from any one of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium bis (oxalato) borate, sodium difluoro (oxalato) borate, sodium bis (trifluoromethanesulfonyl) imide, sodium bis (fluorosulfonyl) imide, sodium perchlorate, sodium nitrate, sodium chloride and sodium difluorophosphate; the additives are ethylene carbonate and propylene carbonate; the polymer solution is composed of a polymer and an organic solvent; the mass ratio of the sodium super-ion conductor to the polymer is 1: (2-5). The porous composite polymer solid electrolyte disclosed by the invention has excellent ionic conductivity and flame retardance, relatively strong mechanical property and excellent safety.

The invention provides a lithium ion battery diaphragm containing vermiculite nanosheets, a preparation method of the lithium ion battery diaphragm and a lithium ion battery, and the preparation method comprises the following steps: (1) uniformly mixing polyvinylidene fluoride and the vermiculite nanosheets in an organic solvent to obtain a mixed liquid; (2) coating the mixed liquid on a substrate; (3) immersing the coated substrate in a water bath for non-solvent induced phase separation to form a porous composite membrane; and (4) stripping the porous composite membrane from the substrate, and removing the residual solvent in the porous composite membrane to obtain the lithium ion battery diaphragm containing the vermiculite nanosheets. According to the preparation method disclosed by the invention, vermiculite nanosheets (VNs) are introduced into a PVDF matrix through a non-solvent induced phase separation (NIPS) technology, so that the PVDF diaphragm with high porosity, high electrolyte absorptivity and excellent thermal stability and mechanical property is prepared.

A porous carbon / anode material composite, including: (a) a porous carbon structure host having pores and pore walls (e.g., carbon framework or skeletons); (b) a plurality of anode active material particles that are disposed in said pores and wherein a weight fraction of the anode active material particles in the composite is from 0.1% to 99%; and (c) an optional carbon coating deposited on a surface of the active material particles or a carbon matrix with the anode active material particles dispersed in the carbon matrix, wherein the carbon coating occupies from 0% to 30% by weight of the composite. Also provided is an anode, including such a porous carbon / anode material particle composite, a lithium-ion cell including such an anode, and a method of producing the porous composite.

The invention discloses a porous GNP / PDMS composite material, a preparation method thereof and application of the porous GNP / PDMS composite material in a flexible sensor, and belongs to the technical field of flexible sensors and preparation of the flexible sensors. According to the preparation method, expanded polystyrene microspheres are taken as sacrificial templates to be combined with glucose, a spherical pore structure is constructed through a vacuum infiltration method, graphene is dispersed in a PDMS matrix by adopting a multi-step ultrasonic dispersion technology, and porous GNP / PDMS composite materials with different graphene contents are obtained. On the basis, a conductive electrode and a flexible packaging layer are combined to construct a high-sensitivity flexible sensor. Results show that the GNP / PDMS composite material containing 4 wt.% of graphene shows excellent mechanical properties, the elastic modulus is 2.43 MPa, the maximum tensile strength is 1.46 MPa, meanwhile, the recovery of more than 99.6% is maintained after 200 times of compression cycles, and the composite material shows very strong mechanical stability.

The present invention discloses a method for preparing a C / C-SiC composite material by low-temperature reactive infiltration of a silicon-nickel alloy. The method comprises the following steps: uniformly pressing silicon powder and nickel powder into a mold by mechanical stirring and grinding; heating the pressed block to form a silicon-nickel alloy, and crushing the alloy block into alloy particles; laying a porous C / C composite material on top of the silicon-nickel alloy particles, and reactive infiltration in a vacuum furnace in a vacuum atmosphere or an Ar or N2 inert atmosphere to obtain a C / C-SiC composite material. The silicon-nickel alloy is used to address the limitations of the C / C-SiC composite material prepared by the pure silicon reactive infiltration process, such as low strength, high reactive infiltration temperature, and damage to fiber strength. The present invention has the advantages of significantly reducing the reactive infiltration process temperature, improving the uniformity of SiC phase distribution in the matrix, and improving the mechanical properties of the composite material, such as flexural strength and fracture toughness.