359 results about "Porous network" patented technology

The invention relates to the technical field of electrode materials, and discloses a preparation method of a lithium iron manganese phosphate material and a lithium ion battery. The lithium iron manganese phosphate material is prepared by the following steps: performing in-situ growth in a cavity of polyethylene glycol-sucrose hybrid aerogel with a three-dimensional porous network structure to form a manganese iron phosphate precursor; the hybrid aerogel can control excessive agglomeration and disordered growth of ferromanganese phosphate precursor particles and avoid particle agglomeration, so that the finally formed lithium ferromanganese phosphate material particles are finer and more uniformly distributed, and an amorphous carbon-aluminum layer is formed during later calcination, so that the performance of the material is improved. The surface of lithium manganese iron phosphate particles is tightly coated with the composite material, electron transmission can be accelerated, particle pulverization can be reduced, meanwhile, corrosion of corrosive components in electrolyte can be inhibited, interface side reactions such as transition metal ion dissolution can be reduced, and finally the conductivity and cycling stability of the lithium ion battery are remarkably improved.

The invention relates to the technical field of functional polymer composite materials, and provides diatomite modified composite super absorbent and rapid absorbent resin and a preparation method thereof. The preparation raw materials of the diatomite modified composite high-water-absorption and rapid-water-absorption resin provided by the invention comprise acrylic acid, acrylamide, sodium hydroxide, N, N '-methylene bisacrylamide, ammonium persulfate and modified diatomite. The diatomite is modified by the silane coupling agent, the agglomeration problem of the diatomite is solved, the compatibility with organic monomers is improved, and the modified diatomite, acrylic acid and acrylamide are utilized to construct an organic-inorganic synergistic three-dimensional porous network structure, so that the resin has ultrahigh water absorption rate, rapid water absorption performance and good water retention stability. Meanwhile, the preparation method disclosed by the invention does not need nitrogen protection, has the advantages of simple process, controllable raw material cost and easiness in industrial mass production, and is suitable for multiple fields such as water-saving agriculture, soil moisturizing, landscaping and the like.

The invention relates to the technical field of flexible sensors, in particular to a gradient hierarchical porous structure flexible piezoresistive sensor and a preparation method thereof. The sensor is of a laminated structure and comprises an upper flexible packaging protection layer, a lower flexible packaging protection layer, a conductive fabric electrode and a middle piezoresistive sensing layer, and a limiting frame is arranged on the periphery of the sensor. The sensing layer is prepared by adopting a 3D printing ink direct writing technology, and adopted printing slurry takes silicone rubber as a matrix and is uniformly mixed with expanded conductive microspheres and conductive filler. The printing wires are stacked in order to form a macroscopic gradient porous network structure; after the expanded microspheres are subjected to in-situ foaming, micro closed pores are formed in the material, and a rough microstructure is constructed on the surface of the wire material, so that hierarchical multi-scale regulation and control of a conductive network are realized cooperatively, contact sites are increased remarkably, and the sensitivity of the sensor is further improved effectively. The flexible piezoresistive sensor prepared by the invention has the advantages of high sensitivity, wide pressure detection range and high linearity, and has the commercial values of simple preparation process, high repeatability, lower cost and the like.

The invention relates to a membrane electrode and application thereof in deuterium-enriched water, and belongs to the field of clean energy development and utilization. The membrane electrode comprises a proton exchange membrane, an anode catalyst and a cathode catalyst, the anode catalyst is an iridium / iridium oxide catalyst with a three-dimensional porous network structure, and the cathode catalyst is a platinum-ruthenium alloy catalyst. The preparation method comprises the following steps: coating one side of the N117 proton exchange membrane with the anode catalyst, coating the other side of the N117 proton exchange membrane with the cathode catalyst, and then performing hot pressing to prepare the membrane electrode. The method comprises the following steps: assembling a membrane electrode into an electrolytic cell, and electrolyzing water by using the electrolytic cell to realize deuterium enrichment. The membrane electrode and the electrolytic cell are reasonable in design, the preparation process is simple and controllable, and the obtained product is high in efficiency and long in service life when used for enriching deuterium and facilitates industrial application.

The invention provides a composite hydrogel for infectious bone defect repair and a preparation method thereof, and belongs to the technical field of bone defect repair, the composite hydrogel comprises a three-dimensional porous network structure hydrogel and a bioactive unit, and the bioactive unit is loaded in the three-dimensional porous network structure hydrogel; the hydrogel with the three-dimensional porous network structure is prepared from photo-crosslinked methacrylated silk fibroin and nano-hydroxyapatite; the bioactive unit comprises a strontium metal organic framework loaded with curcumin. According to the invention, the photo-crosslinked methacrylated silk fibroin provides excellent biocompatibility; as an ion / drug dual carrier, the strontium metal organic framework can continuously release strontium ions and bidirectionally regulate bone metabolism (promoting osteogenesis and inhibiting osteoclast), and the porous structure of the strontium metal organic framework can efficiently load a hydrophobic drug curcumin (Cur). Curcumin has strong antibacterial and anti-inflammatory functions; the nano-hydroxyapatite can obviously enhance the mechanical strength of the hydrogel.

The invention provides a sodium ion battery capacitor and a preparation method thereof. The sodium-ion battery capacitor comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, the positive pole piece comprises a composite positive pole material, and the composite positive pole material comprises a capacitive material and a layered oxide; the negative electrode plate comprises a composite negative electrode material, and the composite negative electrode material comprises hard carbon and a surface functional group modified porous carbon nanotube. The capacitive material and the layered oxide are synergistically matched to serve as the composite positive electrode material, a three-dimensional porous network structure is formed, and the synergistic effect of the double-electrode-layer capacity and the oxidation-reduction reaction can be improved; the hard carbon and the surface functional group modified porous carbon nanotube are synergistically matched to serve as the composite negative electrode material, so that the sodium ion diffusion path, the electrolyte infiltration area and the charge-discharge efficiency are favorably optimized, and the sodium ion adsorption capacity is improved. The sodium ion battery capacitor has the characteristics of high energy density, high power density, wide temperature range charging and discharging capability and the like.

The invention relates to the technical field of marine ecological engineering, in particular to a marine coral reef ecological restoration method based on a foamed aluminum base material, which comprises the following steps: preparing a modified foamed aluminum main body structure, constructing a modified bioactive surface layer, filling a modified phase change material capsule, and putting a restoration unit. According to the invention, the foamed aluminum main body structure provides a stable three-dimensional through porous network, and a natural reef habitat environment is simulated; a hydroxyapatite coating or a polymer layer constructed on the surface of the coral bone-imitating material remarkably improves the coral larva attachment and colonization efficiency through coral bone-imitating inorganic components or specific polypeptides respectively; the phase-change material capsules filled inside buffer water temperature fluctuation through phase-change latent heat, a stable micro-thermal environment is provided for coral growth, the functions of all the components are complementary and synergistic, foamed aluminum provides a carrier for surface functionalization, the surface active layer optimizes a biological interface, the internal temperature adjusting unit guarantees ecological suitability, and an efficient repairing system is formed. The coral reef ecological restoration effect is obviously improved.

The present application relates to the technical field of nano-catalytic material preparation, in particular to a preparation method of multi-stage pore mesoporous carbon loaded metal nanoparticles, which constructs vertical and through macroporous channels by taking biomass diatomite as a template, forms ordered mesoporous structure by introducing block copolymer, and realizes macro-pore-mesopore-micropore three-stage communication of carbon-based skeleton by adding porogen to produce macro-porous network in the pyrolysis process, and gradientally limits and loads bimetallic components on the multi-stage pore mesoporous carbon. The material has the advantages of macroporous rapid mass transfer, mesoporous limited stable nanoparticles and single-atom site efficient catalysis, and can efficiently catalyze and degrade various wastewater organic pollutants in a wide pH range.

The invention discloses a composite phase change material containing a directional hierarchical pore heat conduction network and a preparation method thereof.The method comprises the steps that an aqueous solution of polyamic acid salt, an aqueous solution of graphene oxide and modified expandable graphite flakes are mixed and then subjected to directional freezing and freeze drying, and a porous network framework is prepared; sequentially carrying out imidization, thermal expansion and graphitization treatment on the porous network skeleton in an inert atmosphere to prepare a graphite-based directional hierarchical pore network skeleton; and under vacuum, dipping the graphite-based directional hierarchical pore network skeleton in the phase change material to prepare the composite phase change material containing the directional hierarchical pore heat conduction network. By modifying expandable graphite flakes to optimize dispersibility and combining ice crystal template induced assembly and a controllable expansion process, an axial ordered heat conduction network and a porous synergistic confinement structure are constructed, the heat conduction and heat storage efficiency of the material is effectively improved, capillary adsorption of multi-scale apertures is utilized, and the heat storage efficiency of the material is improved. And the leakage problem of the solid-liquid phase change material is effectively solved.

The invention relates to the field of biological materials and nanotechnology, and discloses a nano lignin-based hydrogel preparation method which comprises the following steps: S1, pretreating more than 15% of lignin-rich cellulose biomass raw materials by using a choline chloride-lactic acid deep eutectic solvent to prepare nano lignin particles; s2, the nano lignin particles are mixed with silver nitrate and sodium hydroxide, and lignin-silver nano particles are synthesized through an oxidation-reduction reaction; s3, adding the lignin-silver nanoparticles into a polyvinyl alcohol solution, and mixing to form a mixture; and S4, carrying out freezing-thawing cycle induced physical crosslinking on the mixture to form the nano composite hydrogel. By forming a compact porous network, the hydrogel not only has good mechanical properties (the tensile strength reaches 0.7-0.9 MPa), but also has good toughness and ductility (1.0-1.3 MJ.m <-3 >) and excellent pressure sensitivity (the pressure sensitivity is 2.5-2.7 kPa <-1 >).

The invention relates to hydrogen bond-covalent bond-oriented network nanofiber hydrogel and a preparation method and application thereof.The preparation method includes the steps that PVA and BC are utilized to form a physical cross-linked network through hydrogen bond and TA cross-linking, and BC / PVA aerogel of a three-dimensional porous network structure is prepared through an oriented freezing technology; then, the BC / PVA aerogel is immersed in an AM solution, AM forms a chemical cross-linked network through free radical polymerization, and the composite materials are assembled, entangled and connected together in the polymerization process to form the BPA hydrogel of a physical-chemical cross-linked multi-network structure. Finally, the PPy / BPA conductive hydrogel with the multi-network structure is prepared through pyrrole in-situ polymerization. According to the present invention, the three-dimensional network structure of the directionally arranged micro-nano multi-scale is constructed in the hydrogel, and the three-dimensional network structure and the covalent cross-linked network form the composite hydrogel with the multi-network structure, such that the hydrogel has excellent crack resistance, and the mechanical strength and the sensitivity of the hydrogel are synergistically improved;

The invention relates to a novel phosphorus-fluorine curing agent for phosphogypsum and a preparation method thereof, and belongs to the technical field of industrial solid waste treatment and resource utilization. The curing agent comprises superfine slag powder, anhydrous sodium sulfate, water glass, water, sodium hydroxide and a Fe3O4 (at) SiO2 (at) Zr-Al bimetallic oxide stabilizer. The Fe3O4 (at) SiO2 (at) Zr-Al bimetallic oxide stabilizer is of a core-shell structure, magnetic ferroferric oxide particles serve as a core, and the surfaces of the magnetic ferroferric oxide particles are sequentially coated with an amorphous silicon dioxide protection layer and an active layer. And the active layer is an amorphous and porous zirconium-aluminum bimetallic oxide with a network structure. The preparation method of the curing agent is simple, mild in condition and easy for industrial production, the main raw material is the industrial solid waste slag, the effect of treating waste with waste is achieved, the agent addition amount is small, and the comprehensive treatment cost is low.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a self-repairing wave-absorbing composite material and a preparation method and application thereof. Porous biochar is used as a matrix to replace a traditional carbon base. Through the composite design of the manganese selenide nanosheets and the charcoal porous network, the problem that the charcoal loss mechanism is insufficient is solved, the magnetic-dielectric synergistic loss mechanism is realized, and the efficient electromagnetic wave absorption performance is realized by optimizing the filler. A dynamic chemical bond disulfide bond is introduced into polyurethane through a chain extender, so that a polyurethane matrix is endowed with self-repairing capability, the maintenance cost is effectively reduced, and the comprehensive protection of the electromagnetic wave absorbing coating on an electronic device is ensured. Meanwhile, the inherent flexible characteristic of polyurethane is also beneficial to multi-scene adaptation, and the environmental adaptability of the composite material is improved. In addition, a filler conductive network is coupled with the high strain characteristic of polyurethane, so that the composite material has heat insulation performance and strain induction capacity, and combination of an electromagnetic wave absorbing material and novel intelligent wearable heat management equipment is facilitated.

The invention discloses a temperature-sensitive response type medical hydrophilic polyurethane intelligent slow-release foam, and relates to the technical field of medical materials, a foam matrix layer is of a three-dimensional porous network structure formed by hydrophilic polyurethane, pores are connected with one another, an intelligent response layer is compounded on the surface of the foam matrix layer and the inner walls of the pores, and the intelligent response layer is formed by compounding the intelligent response layer and the foam matrix layer. The composite intelligent response layer comprises a temperature-sensitive polymer network and a pH-sensitive functional group, the temperature-sensitive polymer network responds to temperature change to dynamically adjust the opening and closing state of pores, and the pH-sensitive functional group responds to an alkaline environment to release antibacterial components. The temperature-sensitive polymer network can dynamically adjust the opening and closing states of the pores: when the wound temperature rises, the hydrophobicity of the polymer is enhanced, the pores automatically shrink to reduce seepage evaporation, and when the temperature drops, the hydrophilicity is recovered, and the pores expand to accelerate discharge of exudate.

The invention discloses an interface evaporation seawater desalination device based on an armor Janus structure and a preparation method, and relates to the technical field of seawater desalination devices.The device comprises a black copper net frame and a carbon nano tube sponge, the carbon nano tube sponge is filled in the black copper net frame, the black copper net frame is made of a super-hydrophobic material, and the carbon nano tube sponge is filled in the black copper net frame. The carbon nanotube sponge is made of a super-hydrophilic material; the super-hydrophilic carbon nanotube sponge on the inner layer can quickly adsorb and transmit seawater by virtue of excellent hydrophilicity and a porous network structure, and a water micro-channel penetrating through the whole body is efficiently constructed; the super-hydrophobic black copper net on the outer layer is like a protective barrier, and the super-hydrophobic characteristic of the surface of the super-hydrophobic black copper net can remarkably reduce the adhesive force between seawater and the net surface, so that salt crystals possibly separated out in the evaporation process are difficult to adhere to the surface of the super-hydrophobic black copper net, and the problem of interface blockage caused by accumulation of the salt crystals is effectively avoided.

The invention relates to the technical field of engineering plastics, and particularly discloses high glowing filament halogen-free flame-retardant polyamide and a preparation method thereof.The high glowing filament halogen-free flame-retardant polyamide is prepared from, by mass, 40%-60% of polyamide resin, 20%-40% of a reinforcing agent, 10%-20% of a halogen-free flame retardant, 1%-2% of a flame-retardant synergist and 2%-3% of auxiliaries; the main component of the flame-retardant synergist is silicon dioxide. Silicon dioxide with ultralow heat conductivity coefficient, extremely low density and high porosity is introduced into a polyamide flame-retardant composite system, the material is endowed with good adhesion and maintains high mechanical performance due to the unique three-dimensional porous network structure of silicon dioxide, the heat insulation efficiency can be greatly improved, and the flame-retardant effect is effectively achieved; the flame retardant grade of UL94 / 1.6 mm V0 is reached, and the high GWIT performance of the material is improved.

The invention is applicable to the technical field of new energy materials and water treatment, and provides solar-driven multifunctional composite hydrogel and a preparation method and application thereof, the multifunctional composite hydrogel comprises dual-network hydrogel, a nanofiber skeleton and functional particles; the double-network hydrogel is formed by interpenetrating and cross-linking a polyelectrolyte hydrogel and a temperature-sensitive hydrogel; the functional particles are loaded in a three-dimensional porous network structure formed by the double-network hydrogel and the nanofiber skeleton. When the device floats on the surface of a water body, efficient solar interface evaporation water production, stable power generation based on the water photovoltaic effect and efficient adsorption removal of nitrogen and phosphorus nutritive salt in the water body can be synchronously achieved under illumination, and therefore algae growth is inhibited. According to the invention, the integrated collaborative management of water collection, energy conversion and ecological restoration is realized, the preparation process is simple, the environmental adaptability is high, and an innovative scheme is provided for solving the distributed water-energy supply and ecological environment problems in coastal, island and other regions.

The present invention belongs to the field of biomedicine technology, and in particular to a preparation method and use of a composite hydrogel based on bioadhesive nanoparticles. The present invention utilizes bioadhesive nanoparticles BNP based on PLA-HPG to react with carboxymethyl chitosan, and a reversible Schiff base bond is formed by the aldehyde group on the surface of BNP and the amino group of carboxymethyl chitosan, so that BNP and the polymer are cross-linked to form a composite hydrogel with a porous network structure and containing bioadhesive nanoparticles. The composite hydrogel has good biocompatibility and injectability, and the BNP and porous structure therein enable the hydrogel to deliver water-insoluble and water-soluble drugs simultaneously, and has a sustained-release effect, can be applied to aspects such as peritoneal drug delivery and skin drug delivery, greatly expanding the application value of BNP, and has huge potential application prospects.

This application provides a flame-retardant and toughened cable material, prepared from the following components in parts by weight: 85-100 parts PVC resin, 15-20 parts dioctyl phthalate, 10-15 parts chlorinated paraffin, 10-15 parts dioctyl terephthalate, 40-50 parts heavy calcium carbonate, 5 parts stabilizer, 2-3 parts PE wax, 1-2 parts stearic acid, and 20-30 parts flame-retardant particles. The flame-retardant particles are composite microspheres formed by loading flame retardants onto nano-silica aerogel and grafting POSS onto its surface. Nano-silica aerogel has a higher temperature resistance limit, and its unique three-dimensional porous network structure can absorb heat and restrict oxygen diffusion. It can also load flame retardants, resulting in a more uniform distribution of the flame retardant. POSS acts as a bridge between the nano-silica aerogel and PVC resin, improving the compatibility and bonding strength between the flame-retardant particles and PVC resin, reducing stress concentration, and improving toughness, thus achieving simultaneous improvement in flame retardancy and toughness.

The invention relates to the technical field of aqueous zinc ion batteries, in particular to an aqueous zinc ion battery zinc negative electrode and a preparation method and application thereof, and the preparation method comprises the following steps: preparing coating slurry comprising InMOF nanoparticles, a solvent and an adhesive; heating the zinc negative pole piece to 140-160 DEG C; spraying the coating slurry to the surface of a zinc negative electrode plate, then drying, and pyrolyzing the coating slurry to obtain the zinc negative electrode with the MOF coating; the InMOF nano-particle coating is introduced into the zinc negative electrode, and a three-dimensional porous network structure formed by InMOF nano-particles can be used as a rigid zinc ion transmission channel, so that dendritic crystal growth is inhibited, the service life of the battery is prolonged, and the electrochemical performance is improved.

This invention belongs to the field of functional polymer composite materials technology, and more specifically relates to a titanium oxide cluster composite fiber membrane with broad-spectrum photoresponse, its preparation method, and its applications. The preparation method includes: using 3-fluorocatechol and titanate as reactants, a solvothermal reaction is carried out under an inert atmosphere to obtain trifluorocatechol-modified titanium oxide cluster crystals; then, these crystals are dissolved with thermoplastic polyurethane particles in an organic solvent to prepare a composite spinning solution, which is then electrospun and dried to obtain the composite fiber membrane. In this fiber membrane, the titanium oxide clusters are uniformly dispersed at the nanoscale, forming a three-dimensional porous network structure with a diameter of 100-1000 nm, exhibiting broad-spectrum strong absorption (300-1000 nm), superhydrophobicity, and excellent photothermal properties. This invention effectively solves the problem of inorganic nanoclusters agglomeration in organic matrices through surface modification, achieving synergistic antibacterial effects through photothermal and photocatalytic processes, and has broad application prospects in medical protection, intelligent thermal management textiles, and environmental purification.

The invention provides a method and device for separating gas by using gas hydrate rapidly generated in water-absorbent resin, and belongs to the field of hydrate method storage and transportation and gas separation, and the device comprises a gas storage module, a gas treatment module, a gas hydrate generation module, a water storage module, a surfactant storage module, a water-absorbent resin storage and treatment module and a hydrate transfer module. The characteristic that the gas-liquid contact area can be greatly increased by a porous network structure formed in the swollen water-absorbent resin is fully utilized, an efficient channel is provided for gas diffusion, the diffusion rate of gas in water is increased by utilizing the surfactant, the nucleation and growth rate of the hydrate is increased, and the energy consumption cost required by a traditional stirring method is reduced. The generated hydrate can be directly sealed in water-absorbent resin and can also be transferred for other purposes.

The invention belongs to the technical field of copolymers and electrochemical application thereof, and particularly relates to a flexible copolymer with electrochromism and electrochemical energy storage performance and a preparation method and application thereof. The preparation method of the flexible copolymer with electrochromism and electrochemical energy storage performance comprises the following steps: adding 9-fluorenylformic acid and 3-bromo-4-methylthiophene into BFEE, and carrying out polymerization by adopting an electrochemical workstation, so as to prepare PBMTh-co-PFCA on a working electrode. According to the flexible copolymer with electrochromism and electrochemical energy storage performance as well as the preparation method and application thereof, the preparation method is reasonable in design and simple and convenient to operate. The flexible copolymer disclosed by the invention is PBMT-co-PFCA, and has mutually communicated porous network structures, so that the contact area is increased. The PBMTh-co-PFCA material disclosed by the invention is used for preparing ESD (Electro-Static Discharge), so that the electrochemical response and the charge storage capacity are remarkably improved.

The invention discloses an electronic skin capable of realizing non-inductive, continuous and sensitive motion monitoring, and belongs to the field of flexible electronics and biomedical engineering. The electronic skin is mainly prepared from sodium alginate and acrylamide to form porous network gel, and the porous network gel is cross-linked to prepare the original porous base electronic skin; preparing solid-like coating paint from silicon dioxide nanoparticles, silicone oil and epoxy resin; the solid-like coating paint is uniformly sprayed on the surface of the original porous-based electronic skin through a spraying technology, and is cured to form the solid-like coating modified electronic skin. The electronic skin with the specific formula and thickness is prepared, and personalized, low-cost, portable, wireless, non-inductive, continuous and sensitive motion monitoring can be achieved.

The invention discloses a backing material, a preparation method thereof and a backing assembly. The backing material comprises a three-dimensional porous network framework formed by butadiene styrene rubber, pores of the three-dimensional porous network framework are filled with resin, and the resin and the three-dimensional porous network framework form an interpenetrating network structure. According to the backing material provided by the invention, the sound attenuation performance of the material is remarkably improved (under the frequency of 2.25 MHz, the sound attenuation performance can reach 140-251 dB / cm), and the hardness of the material is remarkably improved (flexible regulation and control can be realized between 55 D and 70 D).

The present application relates to a kind of liquid metal / MXene / sodium alginate / polyacrylamide composite hydrogel material and its preparation method and application, the hydrogel material includes liquid metal microsphere, sodium alginate and polyacrylamide form hierarchical porous network and flaky MXene.Preparation step includes: S1.add liquid metal to aqueous solution, ultrasonic dispersion obtains dispersion liquid;S2.dispersion liquid is added to sodium alginate solution, and ultrasonic sodium alginate is obtained to liquid metal water solution;S3.acrylamide is dissolved in deionized water, then sodium alginate is added to liquid metal water solution, then crosslinking agent, initiator and MXene are added, and stirring is uniform;S4.pour into mould heating and form hydrogel.The composite hydrogel material prepared by the present application has the advantages of high tensile rate, strong electromagnetic shielding performance, etc., and can be used as electronic skin for electromagnetic shielding, human health monitoring, man-machine communication, soft robot.

The invention provides an energetic composite material with a micro combustion chamber structure and a preparation method thereof, and the method comprises the following steps: step 1, preparing a composite combustion catalyst: taking a two-dimensional nanosheet material as a carrier, and realizing uniform loading of a nano catalyst through an interface engineering method to obtain the composite combustion catalyst; 2, constructing a three-dimensional porous network structure: constructing the composite combustion catalyst obtained in the step 1 into a porous network combustion catalyst with the three-dimensional porous network structure; and 3, preparing the energetic composite material: adding an oxidizing agent, energetic explosive powder and metal powder into an adhesive, stirring to form energetic material slurry, adding the energetic material slurry into the porous network combustion catalyst obtained in the step 2, and carrying out vacuum impregnation and curing for 12-48 hours to obtain the energetic composite material with the micro combustion chamber structure. The porous network combustion catalyst is preformed, so that the dispersion state of the nano-catalyst is effectively controlled, and the catalytic effect of the nano-catalyst is improved.

The invention relates to the technical field of organic silicon materials, in particular to a light-weight high-flame-retardant organic silicon composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 100 parts of an organosilicon polymer, 15-60 parts of a composite flame retardant, 5-40 parts of a light filler with a hollow structure, 10-50 parts of a reinforcing filler, 0.5-5 parts of a cross-linking agent and 0.1-2 parts of a catalyst, and a three-dimensional porous network structure constructed by the light filler with the hollow structure and the composite flame retardant is formed in the composite material. The invention provides an organic silicon composite material with low density, high flame retardance and good mechanical property and a preparation method thereof.

The application belongs to the technical field of composite micro / nano fiber materials, and particularly relates to a polyimide and polymer composite micro / nano fiber nonwoven fabric, a preparation method and application thereof. The nonwoven fabric is a three-dimensional porous network composed of composite micro / nano fibers with a skin-core structure; the skin layer material of the composite micro / nano fiber is polyimide, and the core layer material is a polymer; the polymer is at least one of polyacrylonitrile, polyvinylidene fluoride and polyarylene ether. The preparation method is to prepare polyimide spinning solution and polymer spinning solution respectively, then perform coaxial electrospinning, and then perform post-processing. The polyimide and polymer composite micro / nano fiber nonwoven fabric has excellent chemical corrosion resistance, excellent mechanical properties, excellent thermal stability, low cost, uniform material compounding, high porosity and high efficient cyclic adsorption performance, can efficiently remove heavy metal ions and organic dyes in water, and has a wide application prospect in the field of water treatment.

The present application relates to the technical field of biosensor, especially to a glucose sensor based on composite film and a preparation method thereof, after fixing layered MoS2 semiconductor material on a substrate, the present application continues to prepare ion gel film on the substrate, then modifies glucose oxidase on the surface of the ion gel film, after incubation and fixation, modifies a layer of Nafion film on the surface of the ion gel film, because glucose oxidase oxidizes and decomposes glucose to generate protons, with the selective proton passing effect of the Nafion film, the protons pass through the Nafion film to the porous network structure formed by the ion gel film and the layered MoS2 semiconductor material, and cooperate with the cations in the ion gel film to attract more carriers, and form a double-layer structure on the surface of MoS2, cooperate with the current multiplication effect, improve the transmission efficiency of the carriers, and improve the sensitivity of the sensor.