42 results about "Poly(diallyldimethylammonium chloride)" patented technology

The invention discloses a preparation method of an artificial cell coated with a macrophage membrane, and belongs to the technical field of artificial cell preparation. The preparation method comprises the following steps: dissolving poly (diallyldimethylammonium chloride) and sulfobutyl-beta-cyclodextrin in ultrapure water, and mixing an aqueous solution of the poly (diallyldimethylammonium chloride) and an aqueous solution of the sulfobutyl-beta-cyclodextrin to obtain a PDDA / SBE-beta-CD condensation liquid droplet solution; and mixing the macrophage membrane suspension and the PDDA / SBE-beta-CD condensed fluid drops in an equal mass ratio, and realizing in-situ coating of the macrophage membrane by adopting an ultrasonic coating technology to obtain the artificial cell coated with the macrophage membrane. The PDDA / SBE-beta-CD condensation liquid droplet constructed by the invention has good stability under the conditions of physiological salt concentration and pH and at 37 DEG C; the artificial cell coated with the macrophage membrane is prepared by mixing with the macrophage membrane suspension, and the macrophage membrane serving as a shell not only can prevent aggregate aggregation, but also can improve the structural stability and biocompatibility.

The invention discloses a preparation method of a polyimide-boron nitride nanosheet heat-conducting composite film. The preparation method comprises the following steps: firstly, dispersing boron nitride nanosheets into N, N-dimethylacetamide containing poly (diallyldimethylammonium chloride) to prepare slurry; meanwhile, 4, 4 '-diaminodiphenyl ether reacts with pyromellitic dianhydride to prepare a polyamide acid solution. And mixing the two materials, forming a layered structure through vertical and horizontal temperature gradients by adopting a bidirectional freezing casting technology, and freezing by liquid nitrogen to obtain the aerogel in oriented arrangement. And performing hot pressing and step-by-step thermal imidization treatment to obtain the heat-conducting composite film. According to the method, the highly-oriented arrangement of boron nitride nanosheets is constructed through bidirectional freezing casting, and the composite film has excellent heat-conducting property and keeps good mechanical strength and flexibility in combination with the surface modification effect. The process is simple and controllable, and is suitable for the fields of flexible electronics, 5G heat dissipation, battery thermal management and the like.

The application discloses a graphene dispersion liquid and a preparation method thereof, relates to the field of graphene dispersion liquid and a preparation method thereof, and aims at solving the technical problem that it is difficult to obtain a high-concentration stable graphene dispersion liquid at present. In the dispersion liquid, graphene is obtained by reduction of graphene oxide prepared by a Hummers method, and then is uniformly dispersed into N-methyl pyrrolidone under the assistance of dispersants of sodium polystyrene sulfonate and polydiallyldimethylammonium chloride. The application is used for preparing the graphene dispersion liquid.

The application discloses an electronic skin-oriented conductive silver paste and a preparation method and application thereof, and relates to the technical field of flexible printed electronic materials.The raw materials of the electronic skin-oriented conductive silver paste include flaky silver powder, silver nanoparticles, thermoplastic polyurethane elastomer, acrylic elastomer, PEDOT:PSS microgel dispersion, (3-glycidylpropoxy)trimethoxysilane, polydiallyldimethylammonium chloride, hexanedial modified dopamine copolymer, (3-aminopropyl)triethoxysilane, methacryloyloxypropyltrimethoxysilane, cellulose acetate, modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol ether acetate, dibasic acid ester, leveling agent and water.The electronic skin-oriented conductive silver paste has the advantages of good electrical performance, good mechanical-electrical stability, good anti-electromigration and sweat corrosion resistance, and can still maintain dendrite-free and low drift under long-term coupling of sweat and bias, and is suitable for electronic skin.

The invention discloses a Y-type molecular sieve and a preparation method thereof, a catalyst and a preparation method thereof, and a Fischer-Tropsch wax hydrocracking method, and belongs to the technical field of chemical engineering. The method comprises the following steps: S1, mixing a first alkali source, a first aluminum source, a first silicon source, first water and a template agent to obtain a first mixed solution, and pre-crystallizing to obtain a seed crystal guiding agent; the pre-crystallization temperature is 15-35 DEG C, the pre-crystallization time is 24-60 hours, and the template agent is poly (diallyldimethylammonium chloride); s2, mixing a second alkali source, a second aluminum source, a second silicon source and second water to obtain mother liquor; mixing the guiding agent and the mother liquor to obtain initial gel; crystallizing the initial gel to obtain an alkali metal Y-type molecular sieve; and S3, mixing the alkali metal Y-type molecular sieve with an ammonium-containing solution, carrying out ammonium ion exchange treatment to obtain a first Y-type molecular sieve, and carrying out first roasting treatment to obtain a second Y-type molecular sieve. The particle size of the molecular sieve is smaller than 520 nm, and the silica-alumina ratio is larger than 6.5.

The application relates to a double-layer polymer film-based rechargeable moisture power generation device and a preparation method thereof, and belongs to the technical field of moisture power generation. The device comprises an active electrode, a double-layer polymer film and an inert porous electrode which are sequentially arranged, wherein the first layer polymer film of the double-layer polymer film is a mixture of iron hydroxide, polystyrene sulfonic acid and polyvinyl alcohol, the second layer polymer film is polydiallyldimethylammonium chloride, the first layer polymer film is in contact with the active electrode, and the second layer polymer film is in contact with the inert porous electrode; the material of the active electrode is a metal with a standard electrode potential of-1V to +0.5V, and the material of the inert porous electrode is a metal with a standard electrode potential greater than +1V. Through moisture evaporation and redox reaction, the battery can generate power spontaneously in a moisture environment, and can be self-repaired through the redox reaction when the performance decreases, so that the charging effect is realized.

The invention discloses a PDDA (poly (diallyldimethylammonium chloride)) / NiFe-LDH (layered double hydroxides) composite material as well as a preparation method and algae removal application thereof, PDDA (poly (diallyldimethylammonium chloride)) and NiFe-LDH are effectively combined, and the PDDA / NiFe-LDH composite material with synergistically enhanced functions is constructed through accurate proportion regulation and control; under the condition of the same dosage, compared with pure LDH, PDDA and various common traditional coagulants, the composite material has more excellent algae removal efficiency; the prepared composite material has good environmental adaptability, and can stably remove microcystis aeruginosa cells and extracellular organic matters thereof in a wide pH value range under the conditions of different initial algae densities and the like; the PDDA / NiFe-LDH composite material is used for water algae bloom treatment, the dosage ratio can be effectively reduced, the operation cost is reduced, meanwhile, the risk of secondary pollution to the water is reduced, and high efficiency and economical and environment-friendly properties are achieved.

The application belongs to the field of nanometer material in environmental monitoring application, and discloses a fluorescence immunoassay method for detecting ovalbumin concentration based on carbon quantum dots, which comprises the following steps: using L-glutamic acid as a precursor, one-step preparation of carbon quantum dots with amino groups by ultrasonic hydrothermal method; using a reduced graphene oxide method to prepare graphene sheets, and optimizing the graphene by modifying polydiallyldimethylammonium chloride to obtain graphene sheets which can have good fluorescence resonance energy transfer with the carbon quantum dots with amino groups; and coupling the prepared carbon quantum dots with amino groups with a monoclonal antibody. The application directly prepares carbon quantum dots with amino groups by one-step hydrothermal method, and the quantum dots can be directly coupled with a monoclonal antibody. The carbon quantum dots involved in the application avoid the aminoization step, and the linear range can reach 0.1 ng / mL-3000 ng / mL.

A suspension comprising a water soluble polymer suspended as particulates in a nonaqueous liquid is useful for treating water from which contaminant particles need to be removed. The suspension includes mineral oil and at least about 10 wt % of particulate polydiallyldimethylammonium chloride (polyDADMAC) in the form of powder or beads. The suspension can be highly concentrated, for example, up to 80 wt % polyDADMAC. The polyDADMAC can be high molecular weight beads. A method and system for delivering the suspension to flowing wastewater is also described. The method and system can be configured to treat water such as wastewater, wherein the wastewater is generated as a waste stream during various large-scale operations such as mining operations.

The invention discloses a method for removing trace or trace N-nitrosodimethylamine in water by using a self-assembled metal coordination polymer catalytic membrane. The self-assembled metal coordination polymer catalytic membrane material is added into a reaction flask of an N-nitrosodimethylamine solution subjected to nitrogen deoxidation treatment, the amount of loaded zero-valent iron is 25.7 mg / g to 171.4 mg / g, and the initial concentration of N-nitrosodimethylamine is 47.4 mu g / L to 196.5 mu g / L. The reaction bottle is sealed and then placed on a multi-point intelligent magnetic stirrer for magnetic stirring reaction, the rotating speed is 200 rpm, the temperature is 25 DEG C, the pH is 2.5-9.5, and stirring is conducted for 1.5 h. A carboxylated high-molecular polyacrylonitrile membrane is used as a base material, poly (diallyldimethylammonium chloride) polycation and polyacrylic acid polyanion electrolyte are assembled on the surface of the base membrane by adopting an electrostatic self-assembly technology, and the high-molecular self-assembled composite membrane with a large number of carboxyl groups is prepared. And preparing the self-assembled metal coordination polymer catalytic membrane through a metal-polycation electrolyte coordination technology and a classical liquid phase reduction method. The content of iron in the self-assembly metal coordination polymer catalytic membrane and the thickness of a surface functional layer are conveniently and effectively regulated and controlled by controlling the number of assembly layers, the concentration of iron ions in coordination reaction, the pH value of the solution and the like, high activity and stability are kept, and the method has the advantages of being simple in preparation process, low in cost, high in removal rate and the like.

The invention discloses a sizing-free dyeing method, colored yarn and colored fabric, and belongs to the field of textile, the method comprises the following steps: cutting colored waste silk fabric into fragments, dissolving the fragments with a dissolving solution containing calcium chloride and ethanol, intercepting silk fibroin molecules, adding a penetrant and poly (diallyldimethylammonium chloride), adjusting the mixture to be alkaline with sodium carbonate, and drying to obtain the sizing-free waste silk fabric. The pure cotton yarn is subjected to padding dyeing, the dyed pure cotton yarn is neutralized, and then the pure cotton yarn is cleaned and dried. According to the method, the dye on the colored waste silk can be used for dyeing the pure cotton yarn, meanwhile, silk fibroin is matched with poly (diallyldimethylammonium chloride) so that fiber hairiness of the pure cotton yarn can be attached, additional sizing is not needed, and the dye is promoted to be adsorbed to the pure cotton yarn; the silk fibroin brings smooth and soft touch feeling similar to that of silk to the pure cotton yarn to a certain extent, so that the fabric woven by the yarn has the characteristics of softness and comfort without desizing treatment.

The application discloses a preparation method of a sheet structure cyanuric acid / melamine composite. The method comprises the following steps: adding an inhibitor, cyanuric acid and melamine in water, reacting at a temperature of 90-98 DEG C for 2-4 hours, and then filtering, washing and drying to obtain the sheet structure cyanuric acid / melamine composite, wherein the molar ratio of the cyanuric acid and the melamine is (0.95-1.05):1, and the mass ratio of the total amount of the cyanuric acid and the melamine, the inhibitor and water is 1:(0.005-0.007):(2-5), and the inhibitor is a sodium naphthalene sulfonate formaldehyde polycondensate, a polydiallyldimethylammonium chloride and a melamine polyphosphate with a mass ratio of 3:(1-2):(1-2). The method can prepare the sheet structure cyanuric acid / melamine composite, the particle size of which reaches the nanometer level, the dispersibility is good, and the flame retardancy is good.

This invention discloses a method for preparing a manganese dioxide / MXene-like paper electrode suitable for flexible aqueous zinc-ion batteries. Potassium permanganate and ammonium chloride are dissolved in water to obtain a precursor solution, which is then heated to obtain one-dimensional (1D) manganese dioxide nanowires. The 1D manganese dioxide nanowires are immersed in a polydiallyldimethylammonium chloride (PDDA) solution and subjected to ultrasonic treatment. A two-dimensional (2D) MXene dispersion is then added and vigorously stirred to obtain a manganese dioxide / MXene heterojunction electrode material. The manganese dioxide / MXene suspension is then vacuum filtered to obtain a lightweight manganese dioxide / MXene-like paper electrode.

The application aims to provide an organic cation-mediated iron-doped molybdenum disulfide nanosheet self-assembly method and application thereof, and belongs to the technical field of analysis and detection. The method uses polydiallyldimethylammonium chloride as intercalation ions, polyvinylpyrrolidone as stabilizer, and both of them cooperatively control the self-assembly of iron-doped molybdenum disulfide nanosheet. First, the iron-doped molybdenum disulfide nanosheet is prepared by using a hydrothermal synthesis method; then, the PDDA is used as intercalation agent, the PVP is used as stabilizer, and the homogeneous dispersed Fe-MoS2 nanosheet is obtained. Finally, the three-phase liquid-liquid self-assembly method is combined to realize the large-area and single-layer self-assembly of the Fe-MoS2 nanosheet. The method provides a new way for the macroscopic controllable assembly of two-dimensional materials, and combined with the noble metal SERS substrate, the rapid identification and detection of drug molecules can be realized.

The application relates to a method for preparing micron-grade spherical or spheroidal Cu powder in an aqueous phase, which comprises the following steps: weighing a certain amount of copper sulfate and polydiallyldimethylammonium chloride, adding the copper sulfate and the polydiallyldimethylammonium chloride into a certain volume of water, stirring and dissolving to obtain solution A; the molar concentrations of the copper sulfate and the polydiallyldimethylammonium chloride in the solution A are 30-80 mmol / L and 100-300 mmol / L respectively; weighing a certain amount of a reducing agent N,N-diethylhydroxylamine, adding the reducing agent into a certain volume of water, stirring and dissolving to obtain solution B; mixing the solution A and the solution B, stirring at a certain rotating speed at a temperature of 70-95 DEG C for 4h; then centrifugal separation, washing and vacuum drying to obtain micron-grade Cu powder. The micron-grade Cu powder prepared by the application is spherical or spheroidal, has good dispersibility, uniform particle size distribution, adjustable particle size in the range of 1.0-5.0 mu m, narrow particle size distribution range, uniform morphology, high crystallinity, and is beneficial to further preparation of Ag-coated Cu powder (Cu@Ag).

The invention relates to the technical field of epoxy resin composite boards, in particular to a preparation method of a basalt fiber-containing epoxy resin composite board for an automobile. The basalt fiber-containing epoxy resin composite board comprises the following raw materials in parts by weight: 50-80 parts of epoxy resin, 4-8 parts of a curing agent, 3-6 parts of a reinforcing material, 1-3 parts of a flame retardant and 0.2-0.4 part of a toner. According to the invention, the graphene nanosheets and the hexagonal boron nitride nanosheets are firmly loaded on the surfaces of basalt scales through the bridging effect of poly (diallyldimethylammonium chloride), a large amount of breaking energy can be consumed, and the polydopamine-modified carbon nanotubes are connected among different reinforcements in a shuttling manner by virtue of the high length-diameter ratio and excellent interface bonding force, so that the strength of the composite material is improved, and the performance of the composite material is improved. Further, stress is transmitted, and cracks are prevented from converging and expanding, so that when the composite board is impacted and stretched, energy can be effectively dispersed and absorbed, and high strength, high modulus and high toughness are remarkably improved at the same time.

The application discloses a material for treating water bloom by a photocatalytic method, a preparation method and application of the material, and the preparation method comprises the following steps: adding bismuth nitrate, iron nitrate and polydiallyldimethylammonium chloride into ethylene glycol, heating and reacting, and the reaction condition is that the ethylene glycol is refluxed and heated at 150-200 DEG C for 2-6 hours; after cooling, centrifugation and washing are carried out, the obtained precipitate is dried, and the obtained material is Fe-doped BiOCl, namely Fe-BiOCl; wherein the adding ratio of the bismuth nitrate, the iron nitrate, the polydiallyldimethylammonium chloride and the ethylene glycol is 60-100 mg: 30-50 mg: 3-6 mL: 60-100 mL. The application provides a preparation method of the functional material Fe-BiOCl for treating water bloom, and the functional material prepared by the method can effectively inhibit the formation of algae under the photocatalytic action, and is especially suitable for treating blue-green algae bloom.

The invention relates to the technical field of label paper, in particular to high-viscosity self-adhesive label paper and a preparation method thereof. The adhesive layer of the label paper is constructed by the following steps: performing sodium chloroacetate carboxymethylation and itaconic acid aza-Michael addition dual modification on branched polyethyleneimine, grafting dopamine to introduce a catechol functional group and form a coordination node with ferric iron, and compounding with a polyvinyl alcohol-borate dynamic reversible network to obtain the label paper. And finally, carrying out electrostatic compounding with poly (diallyldimethylammonium chloride) at an isoelectric point. According to the design, the adhesive layer has high peel strength and aging resistance in a dry state, can be quickly softened after meeting water and can be completely removed in an interface debonding manner, so that the residual adhesive rate and the substrate damage risk are remarkably reduced, and the problem that high adhesion and removability are difficult to consider at the same time is solved.

The application discloses a method and system for strengthening and modifying activated carbon adsorption of perfluorinated compounds by micro-bubbles, belonging to the technical field of water treatment. The application is to immerse activated carbon in a polydiallyldimethylammonium chloride aqueous solution, treat the immersed activated carbon to be neutral and dry to obtain modified activated carbon; raw water containing PFAS is treated by micro-bubbles, and then the modified activated carbon is added to the raw water for reaction, and the treated water is discharged from the upper layer. The application compensates for the insufficient adsorption of short-chain PFAS by traditional activated carbon through PDADMAC electrostatic adsorption, improves the removal effect by combining the enrichment effect of micro-bubbles; the mass transfer is strengthened by slight disturbance, the adsorption kinetics is accelerated, and the interference of natural organic matter can be resisted to protect the adsorption sites; the process condition is mild and safe, there is no secondary pollution, and the engineering popularization is convenient.

The invention discloses an intelligent response type marine antirust agent composition as well as a preparation method and application thereof. The intelligent response type marine antirust agent composition comprises a solvent and the following components in parts by mass: 6-8 parts of ion response microcapsules, 6-8 parts of photo-thermal response microcapsules, 6-9 parts of benzotriazole covalent grafting modified functionalized graphene oxide and 34-38 parts of film-forming resin, a capsule core of the ion response microcapsule is a corrosion inhibitor; the capsule wall is a polyelectrolyte composite membrane formed by self-assembling cationic polyelectrolyte and anionic polyelectrolyte layer by layer, and the outer surface of the capsule wall further comprises an inorganic nanoparticle layer formed by biomimetic mineralization; the cationic polyelectrolyte is poly (diallyldimethylammonium chloride), the anionic polyelectrolyte is sodium polystyrenesulfonate, and the inorganic nanoparticles are calcium carbonate; the photo-thermal response microcapsule comprises a capsule core which is a mixture of CsPbBr and n-octacosane, and a capsule wall which is polyurea formaldehyde.

This invention discloses a high-efficiency salt-removing, superhydrophilic carbonized wood-based solar evaporator, its preparation, and its application. The evaporator comprises an evaporator body and a heat insulation layer. The evaporator body is made of wood-based material. The wood-based material undergoes sequential treatments including lignin removal, high-temperature carbonization, superhydrophilic modification, and soaking in polydiallyldimethylammonium chloride and sodium polystyrene sulfonate to obtain a highly efficient salt-removing, superhydrophilic carbonized porous wood sponge. The heat insulation layer is tightly attached to the lower end face of the evaporator and is externally wrapped with a water-absorbing material. This invention improves solar energy utilization and reduces salt deposition on the evaporator surface by altering its structure and surface properties, resulting in an evaporator with a higher evaporation rate.

The invention provides an oil-resistant and organic-solvent-resistant rubber material which takes vulcanized rubber as a matrix, and a first modified layer and a second modified layer are sequentially deposited on the surface of the matrix, the first modified layer comprises a plurality of alternate poly (diallyldimethylammonium chloride) layers and polystyrene sulfonic acid layers; the second modified layer is a polyvinyl alcohol layer. The oil-resistant and organic-solvent-resistant rubber material provided by the invention can keep the original structure after being soaked in methylbenzene for 15 hours, the volume change rate is only 2.3%, and swelling does not occur; the product does not expand or dissolve after being soaked in four oil agents for 7 days, and the surface of the product is kept flat and smooth. Meanwhile, by testing the tensile strength of a sample before and after the oil-resistant and organic-solvent-resistant rubber material is soaked in an organic solvent and an oiling agent, it is found that the oil-resistant and organic-solvent-resistant rubber material can still keep the tensile strength before modification.

The invention discloses conductive silver paste for electronic skin as well as a preparation method and application of the conductive silver paste, and relates to the technical field of flexible printing electronic materials. The conductive silver paste for the electronic skin comprises the following raw materials: flake silver powder, silver nanoparticles, a thermoplastic polyurethane elastomer, an acrylic elastomer, a PEDOT: PSS microgel dispersion, (3-glycidyl propoxy) trimethoxysilane, poly (diallyldimethylammonium chloride), an adipic dialdehyde modified dopamine copolymer, (3-aminopropyl) triethoxysilane, a crosslinking agent, a coupling agent and a solvent. The coating is prepared from methyl acryloyloxy propyl trimethoxy silane, cellulose acetate, a modified polyurea thixotropic agent, hydrogenated castor oil, ethylene glycol monoethyl ether acetate, dibasic acid ester, a flatting agent and water. The conductive silver paste for the electronic skin has the advantages of being good in electrical property, mechanical-electrical stability, electromigration resistance and sweat corrosion resistance, can still keep no dendrite and low drift under long-term coupling of sweat and bias voltage, and is suitable for the electronic skin.

The present invention provides a liquid laundry detergent composition that reduces dye bleeding from fabrics. [Solution] A liquid laundry detergent composition comprising a surfactant system and a cationic polymer, wherein the liquid laundry detergent composition comprises 5.0% to 60% by weight of the surfactant system, the surfactant system comprises a branched-chain nonionic surfactant, the cationic polymer is selected from poly(diallyldimethylammonium chloride), a copolymer of diallyldimethylammonium chloride and acrylic acid, a copolymer of methacrylate, methacrylamidopropyltrimethylammonium chloride and acrylic acid, and mixtures thereof, the surfactant system comprises the branched-chain nonionic surfactant at a concentration of 1.0% to 10% by weight of the composition, and the cationic polymer is present at a concentration of 0.5% to 2.5% by weight of the composition.

The application discloses a preparation method of a lithium-sulfur battery diaphragm and belongs to the technical field of battery diaphragms. First, a quaternary ammonium polymer PDDANO3 containing nitrate is prepared by reacting a nitrate and polydiallyldimethylammonium chloride PDDA. Then, the PDDANO3 is dissolved in water to form a solution, which is coated on one side or both sides of the diaphragm, and a functional diaphragm for a lithium-sulfur battery is obtained after drying. The quaternary ammonium polymer PDDANO3 containing nitrate obtained by the method can play the roles of inhibiting the polysulfide ion shuttle effect and lithium negative electrode dendrite growth in the lithium-sulfur battery, so that the specific capacity and cycle stability of the lithium-sulfur battery are significantly improved.

The invention provides a flexible intelligent drug delivery device based on moisture power generation, which comprises a moisture power generation unit, the moisture power generation unit comprises an anode and a cathode, one side of the anode facing the cathode is provided with a polycation layer, one side of the cathode facing the anode is provided with a polyanion layer, and the polycation layer and the polyanion layer are attached to each other; the polycation layer is formed by printing a poly (diallyldimethylammonium chloride) aqueous solution on a corresponding position and then drying to form a film; the polyanion layer is formed by printing a mixed aqueous solution of polystyrolsulfon acid and polyvinyl alcohol at a corresponding position and then drying to form a film; one side of the drug-loaded hydrogel is used for being attached to the skin of a drug administration object; the iontophoresis electrode is used for applying an electric field to the drug-loaded hydrogel, so that the drug permeates into the skin of a drug administration object from the drug-loaded hydrogel. The polycation layer and the polyanion layer are formed through printing, the operation is simple, and the flexible intelligent drug delivery device is easy to produce in batches.

The invention discloses a mushroom-imitating 3D printing water phase change micro-nano generator, and belongs to a new energy technology. The generator comprises a bionic mycorrhiza, a bottom electrode, a bionic stipe, a bionic pileus and a top electrode embedded in the bionic pileus which are arranged from bottom to top in sequence. The bionic mycorrhiza is prepared by thickening polyvinyl alcohol and methyl cellulose through chitosan, performing 3D printing and performing freeze-thaw cycle gelation, and the structure of the bionic mycorrhiza simulates a natural plant root crown; the bionic stipes and pilei are compounded by polystyrolsulfon acid / carbon nanotubes and poly (diallyldimethylammonium chloride) / carbon nanotubes and polyvinyl alcohol respectively, and the shapes of the bionic stipes and pilei imitate the structures of the stipes and pilei of natural mushrooms respectively. According to the generator, hydrogen ions and chloride ions are dissociated from the polyelectrolyte material through the absorption, transportation and evaporation processes of water, and a continuous potential difference is formed under the coupling action of the asymmetric electrode pair, so that effective output of direct-current electric energy is realized, and the generator can be stably applied to collection and conversion of tiny energy in a natural environment.

The preparation method comprises the following steps: carrying out electrostatic self-assembly on prepared molybdenum-doped niobium oxide nanosheets and poly (diallyldimethylammonium chloride) modified reduced graphene oxide in an aqueous solution to obtain a composite material, and carrying out low-temperature carbonization and nitridation reaction to obtain the quick-charge type negative electrode material. The interlayer molybdenum-doped niobium oxide nanosheet is converted into a niobium-molybdenum-nitrogen solid solution nanosheet, and meanwhile, the poly (diallyldimethylammonium chloride) modified reduced graphene oxide is converted into nitrogen-doped graphene, so that the niobium-molybdenum-nitrogen / nitrogen-doped graphene superlattice negative electrode material is prepared. Nitrogen-doped graphene can effectively improve the longitudinal conductivity of the material and prevent agglomeration of the two nanosheets, and can buffer the volume change of the niobium-molybdenum-nitrogen solid solution nanosheets in the charging and discharging process, so that the cycling stability of the material is improved, and guidance is provided for design of the fast-charging transition metal nitride negative electrode material.

The present application relates to the technical field of epoxy resin composite board, in particular to a preparation method of an automobile epoxy resin composite board containing basalt fiber: including the following raw materials by weight: epoxy resin 50-80 parts, curing agent 4-8 parts, reinforcing material 3-6 parts, flame retardant 1-3 parts, color agent 0.2-0.4 parts.In the present application, the surface of basalt flake is bridged by polydiallyldimethylammonium chloride, and graphene microsheets and hexagonal boron nitride nanosheets are firmly loaded, which can consume a large amount of fracture energy, and the carbon nanotubes modified by polydopamine have high aspect ratio and excellent interfacial bonding force, and are connected between different reinforcing bodies, further transmitting stress and preventing crack coalescence and expansion, so that the composite board can effectively disperse and absorb energy when impacted and stretched, thereby simultaneously achieving significant improvement in high strength, high modulus and high toughness.

A suspension comprising a water soluble polymer suspended as particulates in a nonaqueous liquid is useful for treating water from which contaminant particles need to be removed. The suspension includes mineral oil and at least about 10 wt% of particulate polydiallyldimethylammonium chloride (polyDADMAC) in the form of powder or beads. The suspension can be highly concentrated, for example, up to 80 wt% polyDADMAC. A method and system for delivering the suspension to flowing wastewater is also described. The method and system can be configured to treat water such as wastewater, wherein the wastewater is generated as a waste stream during various large-scale operations such as mining operations.