412 results about "Nanoporous" patented technology

The invention discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

The invention discloses a thermal insulation material with enhanced thermal insulation performance and a processing method, and relates to the technical field of thermal insulation material processing. Comprising the following components in parts by weight: 100 to 200 parts of a nanopore matrix material, 20 to 120 parts of expanded perlite, 10 to 350 parts of polystyrene, 30 to 300 parts of polyurethane, 100 to 500 parts of nano titanium dioxide, 10 to 60 parts of graphene, 10 to 40 parts of silica sol and 1 to 55 parts of ferric oxide. A multi-stage pore structure is constructed through a nanopore matrix and expanded perlite, closed-cell foam of polystyrene and polyurethane is combined, and nano titanium dioxide and graphene functional filler are matched, so that the heat conductivity coefficient is reduced to 0.018 W / (mK) or below, the heat insulation efficiency is remarkably improved, nanoscale homogenization is ensured through high-shear dispersion in the process, the porosity is reserved through freeze drying, and the heat insulation performance is greatly improved. The microcapsule self-repairing layer can repair more than 85% of cracks, the service life is greatly prolonged, and in the aspect of function integration, the material has A-level fireproof, waterproof and weather-proof characteristics and heat preservation and heat insulation performance.

A ternary positive electrode material modified with a glassy metal-organic framework, and a preparation method therefor and the use thereof. The ternary positive electrode material modified with a glassy metal-organic framework is obtained by grinding and mixing a ternary positive electrode material and a metal-organic framework, and then subjecting same to a melt quenching treatment under a protective atmosphere. Forming a crack-free glassy metal-organic framework containing nano / sub-nano pores on a surface of the ternary positive electrode material can significantly improve the stability of the ternary positive material, alleviate the dissolution of transition metals, and ultimately improve the electrochemical performance of batteries and prolong the service life of the batteries.

The invention relates to the field of material surface treatment, and discloses a silica gel and metal combined treatment process which comprises the following steps: S1, ultra-short pulse laser is adopted to machine a three-dimensional micro-nano composite structure on the surface of a titanium alloy, the structure comprises a periodic groove array and surface nano holes, and the surface roughness Ra of the titanium alloy is larger than or equal to 5 microns; and S2, a titanium nitride transition layer and a siloxane self-assembly molecular layer are sequentially formed on the roughened titanium alloy surface through atomic layer deposition, and a gradient chemical interface is formed. According to the method, the micro-nano composite structure is processed through ultra-short pulse laser, the interface mechanical embedding area is remarkably increased, the two-dimensional rough limitation of a traditional sand blasting process is broken through, deep barb-shaped anchoring is achieved, the anti-stripping capacity is greatly enhanced, gradient chemical bonding is formed by the atomic layer deposition titanium nitride transition layer and the amino self-assembly molecular layer, and the anti-stripping performance is improved. The thermal expansion difference is effectively buffered, and the interface high-temperature resistance is improved.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention belongs to the technical field of battery diaphragms, and provides a composite diaphragm and a preparation method thereof, and a secondary battery, the composite diaphragm comprises a base membrane and a gradient aperture coating arranged on at least one surface of the base membrane; the gradient aperture coating is prepared from a self-polymerized microporous polymer; the gradient aperture coating comprises a nanopore layer and a composite pore layer, and the nanopore layer is located between the base membrane and the composite pore layer; the nanopore layer comprises nanopores, and the composite pore layer comprises micron pores and nanopores which are interspersed with each other. Through the design of the gradient aperture coating, the composite diaphragm has an excellent blocking effect of transition metal cations and large-volume anions, meanwhile, the lithium ion transference number is high, the internal resistance is relatively low, the electrolyte wettability and the heat resistance are excellent, the cycle performance of the secondary battery comprising the composite diaphragm can be improved, and the service life of the secondary battery can be prolonged.

The invention relates to a high-gloss black decorative glass prepared from sludge incineration ash by an all-electric melting method. The high-gloss black decorative glass comprises the following raw material components in percentage by mass: 75-79% of fly ash, 5-7% of calcium carbonate, 9-10% of sodium carbonate, 5-6% of potassium alkali, 1-1.4% of boric acid, 0.03-0.04% of porous carbon, 0.06-0.08% of semi-coke powder, 0.16-0.22% of cobaltosic oxide, 0.1-0.2% of cerium dioxide, 0.04-0.06% of neodymium oxide, 0.5-0.7% of waste zircon brick powder and 0.03-0.05% of yttrium oxide. The dedusting ash is electrostatic dedusting ash collected by incineration of filtered sludge in a municipal sewage treatment plant, and belongs to hazardous waste; the porous carbon is rich in a hierarchical pore structure of sub-nano pores (0.5-1.0 nm). According to the method, a closed-loop production mode that waste is used for treating waste is constructed, high-added-value decorative materials are produced while energy consumption is reduced, and environmental protection investment is converted into economic benefits.

The invention relates to a multilayer double-gradient nanopore resin-based composite material with strong interlayer bonding and a preparation method thereof, and the preparation method comprises the following steps: injecting first high-porosity nanopore resin into a first low-volume-density fiber preform to obtain a first low-density layer; surface tension weakening treatment is conducted on the first low-density layer, then a second low-volume-density fiber prefabricated body is laid on the first low-density layer, second high-porosity nanopore resin is injected, and a double-layer double-gradient nanopore resin-based composite material with strong interlayer combination is obtained; and surface tension weakening, glue injection, curing and drying treatment are cyclically carried out, the nanopore resin with the residual porosity decreasing progressively is injected into the residual fiber prefabricated body with the residual volume density increasing progressively, and finally the multilayer double-gradient nanopore resin-based composite material with strong interlayer combination is prepared. Compared with the prior art, the overall density of the material is reduced, and meanwhile the ablation resistance and the heat insulation performance of the material are improved.

The invention relates to a nanofiber membrane and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing polyurethane, nano lanthanum oxide, a waterproof agent and a solvent to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain an electrostatic spinning membrane; and (3) spraying the after-finishing liquid on the electrostatic spinning membrane, and then carrying out heating treatment to obtain the nanofiber membrane. Polyurethane is stretched into superfine fibers through an electrostatic spinning technology, an ultrahigh porous membrane similar to a spider web is prepared, billions of nanopores are formed in per square centimeter of the porous membrane, so that the porous membrane has high air permeability and waterproof and moisture-permeable performance, fibers are bound through a fiber bonding point technology, and the fiber bonding point technology is adopted, so that the waterproof and moisture-permeable performance of the membrane is improved. Therefore, the fabric has excellent washing resistance. The nano lanthanum oxide heating functional particles are added, so that the nanofiber membrane is endowed with heating and heat storage functions, and the washing resistance of the fabric is further improved.

The invention relates to a high-pressure hydrogen nano-pore permeability testing device and method based on double-chamber pressure balance, and belongs to the technical field of unconventional oil gas. The device comprises a high-pressure gas source, a pressurization module, a double-layer nested core reaction kettle module and a high-frequency data acquisition and safety monitoring module; by constructing a double-layer nested structure that inner cavity hydrogen is actively wrapped by outer cavity nitrogen and cooperating with an all-metal knife edge hard sealing device and a different flow pattern permeability calculation method, accurate measurement of the Ndarcy grade permeability of the compact cover rock is successfully achieved, the industrial pain point that a traditional device is inaccurate in measurement, unstable in measurement and unsafe is thoroughly solved, and the method is suitable for large-scale popularization and application. And key experimental technology guarantee and scientific data support are provided for closure evaluation of underground hydrogen storage engineering and exploration and development of natural hydrogen resources.

The invention relates to a while-drilling anti-collapse plugging agent for fractured stratums and a preparation and application method thereof, and belongs to the technical field of oil and gas drilling. The water-based drilling fluid comprises the following components: an intelligent response type hydrogel material, a nanopore adsorption material, a degradable microcapsule plugging material, an enhanced fiber material, a microencapsulated phase change material, a high-strength inorganic particle reinforcing agent, a rheology control agent and water or water-based drilling fluid. The preparation and application method comprises the following steps: mixing the intelligent response type hydrogel material, the enhanced fiber material and the nanopore adsorption material dry powder; adding the dry powder material into water or a water-based drilling fluid to form a solution; adding a degradable microcapsule plugging material and a microencapsulated phase change material into the solution; and adding the rheology control agent and the high-strength inorganic particles, and uniformly stirring to obtain the anti-collapse plugging agent while drilling. And entering formation fractures while drilling. The plugging agent has remarkable flowability, cohesiveness and durability, can adapt to cracks of different sizes of complex fractured stratums, and is high in plugging success rate.

The invention belongs to the technical field of coatings, and discloses a 600 DEG C heat insulation coating containing In2O3 and rutile type TiO2 aerogel and a preparation method of the 600 DEG C heat insulation coating. The coating is composed of an organic-inorganic compound adhesive, In2O3 at rutile type TiO2 aerogel, hollow glass beads, HAP ultra-long nanowires and auxiliaries, the aerogel is prepared by combining sol-gel with CO2 supercritical drying, and the aerogel is calcined at 800 DEG C to form a rutile crystal form. The compound adhesive is prepared from alkaline silica sol, modified organic silicon emulsion and a silane coupling agent through hydro-thermal synthesis. The coating is prepared by dispersing all the components at a high speed, heat conduction is inhibited by using aerogel nanopores, infrared radiation is reflected synergistically by rutile TiO2 and In2O3, and heat convection is blocked by a lock catch structure formed by hollow glass beads and HAP nanowires. The thermal conductivity of the obtained coating at 600 DEG C is as low as 0.035-0.044 W / (m.K), the coating has excellent temperature resistance, thermal shock resistance and full-wave band heat reflection capacity, and the technical problems of high-temperature phase change, structural collapse and poor thermal stability of a traditional coating are solved.

The invention relates to the technical field of microcosmic measurement, and discloses a morphology construction method, device and equipment of a nanoporous material and a medium, and the method comprises the following steps: obtaining profile data of the nanoporous material; determining a baseline of the profile data based on the profile data; based on the profile data and the base line, pore parameters are obtained, and the pore parameters comprise the pore diameter, the pore depth and the porosity; and based on the pore parameters, constructing the morphology of the nano-pore material. According to the method, the limitation of a traditional measurement method is effectively overcome, the complete three-dimensional shape of the nano-porous material can be constructed, and the method is also suitable for various nano-porous materials including but not limited to porous media such as energy storage materials, catalytic materials, biomedical materials and shale.

The invention provides a heterostructure salinity difference energy conversion film based on HOF / two-dimensional mesoporous carbon as well as a preparation method and application of the heterostructure salinity difference energy conversion film. The salinity difference energy conversion film comprises a two-dimensional mesoporous carbon layer serving as a hydrophobic layer and a hydrogen bond organic framework layer which covers one surface of the hydrophobic layer and serves as a hydrophilic layer, wherein the two-dimensional mesoporous carbon layer is formed by compounding a two-dimensional mesoporous carbon material with regular nanopores and aramid nanofibers; the hydrogen bond organic framework layer is formed by compounding a hydrogen bond organic framework material and aramid nanofibers; the heterogeneous Janus structure salinity gradient energy conversion membrane is constructed by adopting a hydrogen bond organic framework and a two-dimensional mesoporous carbon material, and when the heterogeneous Janus structure salinity gradient energy conversion membrane is applied to salinity gradient energy conversion, high ion selectivity, high structural stability and high ion migration flux can be considered.

The invention provides a nano plugging agent for a high-temperature-resistant shale oil gas water-based drilling fluid and a preparation method of the nano plugging agent, and relates to the technical field of drilling plugging agents. The nano blocking agent for the high-temperature-resistant shale oil-gas-water-based drilling fluid is a nano composite precursor aqueous dispersion which is stable at normal temperature, and can be triggered under the underground high-temperature condition and generate in-situ reaction in shale pores and on the surface to form an organic-inorganic hybrid blocking film. According to the technology, a conventional chemical raw material is converted into a high-performance plugging material in a low-viscosity precursor underground in-situ film forming mode, the industrial problem of efficient plugging of shale nano apertures is solved, and the core advantage is that the problem of a traditional physical accumulation mode is solved; a compact and tough organic-inorganic hybrid plugging film is formed in pores through temperature triggering, and plugging is changed into repairing.

The invention belongs to the technical field of electro-catalysis carbon dioxide reduction, and particularly relates to a three-dimensional porous copper oxide-zinc bimetallic film electrode for electro-reduction of carbon dioxide and preparation and application of the three-dimensional porous copper oxide-zinc bimetallic film electrode. The preparation method comprises the following steps: firstly, carrying out surface pretreatment on a copper substrate, then carrying out pulse current electrodeposition and dynamic etching on the surface of an electrode in a mixed electrolyte containing zinc salt, copper salt and sodium salt, and finally, carrying out constant current structure reconstruction on the electrode by adopting a long-time reduction method to prepare the three-dimensional porous copper oxide-zinc bimetallic film electrode. The electrode has a unique nano pore channel structure, rapid transfer of interface charges is promoted, and the electrode has rich active sites due to the synergistic effect of a heterostructure. The preparation method has the dynamic regulation and control advantage of pulse deposition and the structural stability of constant-current deposition, a template agent does not need to be added in the preparation process, and the process controllability is high. The obtained electrode shows excellent CO product selectivity, activity and stability in an electro-catalysis carbon dioxide reduction reaction.

A composition of matter includes silicon nanoparticles having nanopores disperse among the silicon nanoparticles, wherein the silicon nanoparticles have an average particle size of less than about 12 nm, and the nanopores have an average size of less than about 10 nm. An anode material includes a micron-sized assembly of silicon nanoparticles having an average particle size of less than about 12 nm, wherein the silicon nanoparticles are spaced by nanopores having average pore size of less than about 10 nm, and wherein the anode material is made by: dispersing the silicon nanoparticles in a solvent; and evaporating the solvent from the silicon nanoparticles to provide an evaporation-induced assembly of the silicon nanoparticles.

The invention discloses high and low temperature resistant rubber and a preparation method thereof, and relates to the technical field of rubber materials. Polyurethane and ceramic aerogel are combined to form a semi-interpenetrating network to prepare the hybrid filler, amino groups on the surface of the aerogel react with isocyanate groups of the polyurethane to generate covalent bonds, polyether / polyester soft segments of the polyurethane serve as flexible chain segments, the movement ability of molecular chain segments is still kept at extremely low temperature, and the hybrid filler is prepared. Meanwhile, nanopores of the aerogel obstruct heat conduction of gas. Carrying out nucleophilic addition on phosphoric acid and epoxy groups of the hollow glass beads, and adding a hybrid filler into silicone rubber for modification; the phosphate group and a chain in the silicone rubber form a hydrogen bond; hydrogen bonds interact to form a polyurethane / aerogel / microbead three-dimensional interpenetrating network; the phosphate layer forms a pyrophosphate network at high temperature to delay thermal decomposition, and the hollow structure of the microbead absorbs thermal stress through deformation during low-temperature shrinkage to cooperate with the gas barrier effect in the microbead. The prepared rubber has the effects of high temperature resistance, low temperature resistance and flame retardance.

The invention provides slurry for multi-scale pore foam silicon carbide ceramic, a material, a preparation method and application. The slurry comprises the following component raw materials in parts by mass: 100 parts of silicon carbide ceramic powder, 50-200 parts of a binder, 5-300 parts of a silicon source material, 0.5-20 parts of a curing agent and 10-150 parts of a solvent. The multi-scale pore foam silicon carbide ceramic material taking the slurry as a preparation raw material is formed by a porous silicon carbide ceramic network and a macroscopic pore network which are communicated in a three-dimensional manner in an interpenetrating manner, and the porous silicon carbide ceramic network is formed by connecting ceramic crystal grains through crystal boundaries, so that high heat conductivity and high strength performance of the material are ensured; the pores of the porous silicon carbide ceramic network are composed of micron-sized pores and nano-sized pores, and the three-dimensional communicated pore network is mainly composed of millimeter-sized pores or / and micron-sized pores. The material has the advantages of multi-scale pore structure, high specific surface area, high strength, high thermal conductivity, light weight, high process controllability and wide application prospect.

The invention relates to the technical field of environmental and biological analysis and detection, in particular to a method for extracting perfluorinated / polyfluorinated compounds based on confinement fluid. The method comprises the following steps: providing a multi-dimensional reticular nanopore material; growing mutually staggered carbon nanofibers on the surface of a substrate through a chemical vapor deposition method; loading a confinement fluid in a pore channel of the multi-dimensional reticular nano-pore channel material; contacting the material with a to-be-detected sample, and extracting; desorbing the extracted material by using a desorption solvent to obtain a desorption solution; and detecting the perfluorinated / polyfluorinated compounds in the desorption solution. A multi-dimensional net-shaped nano pore channel formed by mutual staggering of the carbon nanofibers provides a stable multi-dimensional micro-nano confinement space for confinement fluid. According to the structure, mass transfer and distribution of a target analyte from a complex matrix to a confinement fluid are greatly promoted, so that efficient enrichment of various perfluoro / polyfluoro compounds is realized, and the recovery rate and the detection sensitivity of the method are improved.

The invention provides a hybrid material for MOF confinement catalytic growth of nano silicon and a preparation method of the hybrid material, and relates to the technical field of batteries. According to the preparation method, collapse of a pore structure caused by severe decomposition is avoided through gradient temperature rise, ordered carbonization of an MOF framework is realized, a hierarchical porous carbon-based framework is formed, the MOF derived carbon framework has a three-dimensional porous structure, and the hierarchical structure better buffers silicon expansion stress; metal sites in MOF porous carbon catalyze silane decomposition, and oriented deposition of silicon atoms is achieved in sub-nano pore channels; the MOF confinement catalytic growth silicon nanowire / particle hybrid material is obtained through cooperation of pore structure design and catalytic growth, meanwhile, the selected MOF is rich in nitrogen element, nitrogen doping is achieved after carbonization, and therefore the electrochemical performance is improved; cracking acetylene (CH) to coat a carbon layer on the silicon surface and the porous carbon precursor to form a core-shell structure (Si (at) C); the silicon surface is passivated by the carbon layer, volume expansion in the charging and discharging process is inhibited, and the cycling stability is improved.

The invention belongs to the technical field of eutectic high-entropy alloys and nano hierarchical pore structures, and discloses an eutectic high-entropy alloy with a hierarchical nano pore structure, and a preparation method and application thereof. The alloy comprises the following elements in percentage by atom: 14 to 45 at.% of Co, 4 to 20 at.% of Cr, 4 to 20 at.% of Fe, 15 to 42 at.% of Ni, and 15 to 30 at.% of Al. Due to the unique FCC + BCC dual-phase structure and the nano hierarchical pore structure, the eutectic high-entropy alloy prepared by the method not only has high chemical stability and corrosion resistance, but also provides more active sites, and shows obvious advantages in the aspect of electro-catalytic performance compared with a traditional single catalyst (such as platinum, gold, palladium and the like), and the method is low in requirement on experimental equipment and suitable for industrial production. Large-scale preparation can be realized, and wide application prospects in the fields of electro-catalysis and the like are shown.

The invention belongs to the field of aerogel composite materials, and discloses a heat insulation and wave absorption integrated aerogel composite material which at least has a three-stage pore network structure, the secondary structure is a continuous carbon network and is loaded in pores of the primary structure; the tertiary structure is silicon oxide aerogel with nano pores, and is polymerized on the surface of the secondary structure and in the pores in situ. The aerogel composite material is low in heat conductivity coefficient, good in heat insulation performance, excellent in wave absorbing performance and high in mechanical strength. The invention further discloses a preparation method of the material, the carbon-silicon dioxide composite material prepared through sol-gel and supercritical fluid drying is low in aerogel density and small in pore diameter and has a good barrier effect on solid heat transfer and gas heat transfer, and the prepared composite material has low heat conductivity and good heat conductivity. The continuous carbon network endows the material with excellent wave-absorbing performance.

The invention discloses a moisture-proof and anti-static carton production method, and relates to the technical field of paper packaging materials, the method comprises the following steps: preparing a difunctional intelligent response type ionic liquid of 1-hydroxyethyl-3-methylimidazole cation [HEIM] and dicyandiamide / bis (trifluoromethanesulfonyl) imide mixed anion [DCA] / [TFSI]; respectively compounding the ionic liquid with chitosan and alginate to prepare a biological carrier compound; a functional paperboard containing a nano-pore network is constructed through paper pulp addition and surface coating; the electrostatic self-repairing structure is formed through gradient drying and three-section temperature control circulation treatment, environment self-adaptive adjustment is achieved through an intelligent response mechanism of the ionic liquid, and a multi-stage protection structure with a surface damp-proof layer, a middle-layer conductive network and an internal stable layer is formed; the device has the technical effects of dual-function synergistic interaction, intelligent humidity response, electrostatic self-repairing, selective molecular barrier and the like.

The invention relates to the technical field of lithium ion batteries, and particularly discloses a low-expansion and high-specific-capacity silicon-carbon negative electrode composite material and a preparation method thereof.The low-expansion and high-specific-capacity silicon-carbon negative electrode composite material comprises a porous silicon-carbon composite base material, a nano additive is attached to the porous silicon-carbon composite base material, and the nano additive comprises aluminosilicate. Nano additives such as aluminosilicate and the like are loaded on the porous silicon-carbon composite base material, and a lithium storage and super-ion transmission channel can be constructed by utilizing a unique nano layered structure and nano pores of the nano additives to accommodate volume expansion; meanwhile, due to unique mechanical properties and mechanical strength, the electrode structure can be stabilized, particle pulverization is reduced, volume expansion is inhibited, the porous silicon-carbon composite base material is realized, and the volume expansion rate of the silicon-carbon negative electrode composite material is remarkably reduced while the high capacity of the silicon-carbon negative electrode composite material is maintained; the expansion rate of the silicon-carbon negative electrode composite material prepared by the invention is below 71%.

The invention relates to the technical field of lithium ion batteries, in particular to a composite solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyoxyethylene, lithium bis (trifluoromethylsulfonyl) imide and acetonitrile, then adding a Prussian blue analogue, stirring, and carrying out ultrasonic treatment to obtain a mixed solution; and preparing the mixed solution into the composite solid electrolyte by adopting an electrostatic spinning mode. According to the invention, the Prussian blue analogue with a three-dimensional nanopore structure and a high specific surface area is selected as a raw material, and after the composite solid electrolyte is prepared, the pores of the composite solid electrolyte are relatively large and are uniformly distributed. The special pore structure constructs a more stable and more efficient ion conduction channel, so that the ion conduction is smoother, and the electrochemical performance is improved.

The application provides a preparation system and application of a nano-bubble liquid; the system comprises a first gas supply assembly, a second gas supply assembly, a first liquid device, a second liquid device, a bubble generator, a buffer and a booster pump; the first gas supply assembly provides mixed gas with a carbon dioxide to air volume ratio of 8:2 to a first spiral pipe, the second gas supply assembly provides air to a second spiral pipe, nano-pores are uniformly distributed on the surfaces of the two pipes, and a nano-level filter membrane is arranged at the inlet and outlet of the generator; the first liquid device injects a base liquid into a closed cavity of the generator, the generated solution passes through the second liquid device filled with a stable solution, and then is sent out through the buffer and the booster pump; the system can accurately control the proportion of bubbles, solves the problems of easy dissolution and agglomeration and dispersion of single carbon dioxide bubbles, and finally obtains a stable nano-bubble liquid.

This application provides a copolymer membrane, its preparation method, and its application. The copolymer membrane is a hydrophilic-hydrophobic or hydrophilic-hydrophobic-hydrophilic bilayer structure, wherein the hydrophobic ends are cross-linked by unsaturated bonds. This application uses thermal cross-linking to cross-link the hydrophobic ends of the bilayer structure through unsaturated bonds. This method improves membrane stability; it also immobilizes nanoporins within the membrane, increasing the bonding strength between the pores and the membrane and reducing the risk of nanoporin detachment; furthermore, it significantly reduces the need for light-transmitting materials for UV cross-linking, lowering costs; and it avoids the adverse effects of free radicals generated by chemical cross-linking on the porous proteins.

The present invention relates to an organic-inorganic hybrid thermal protection material resistant to discrete interval gas ablation, as well as its preparation method and application. The material comprises an inner layer of low-density composite material and a surface high-density organic-inorganic hybrid composite material. The inner layer of low-density composite material comprises a micron-porous pure phenolic aerogel as a matrix and a quartz fiber preform as a reinforcement, while the surface high-density organic-inorganic hybrid composite material comprises an organic-inorganic hybrid nanoporous phenolic aerogel as a matrix and a carbon fiber preform as a reinforcement. Compared with the prior art, the organic-inorganic hybrid thermal protection material prepared by the present invention has the advantages of low linear ablation rate, lightweight thermal insulation, and low residue generation during ablation in a discrete interval gas ablation environment. It can be applied to internal insulation structures such as gas pipelines and valve cavities of attitude and orbit control engines with discrete interval startup.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.