533 results about "Ethylene imine" patented technology

The invention provides a flame-retardant heat-insulating fabric for fire-fighting clothes and a preparation process thereof, and belongs to the technical field of fire-fighting fabrics. The preparation process comprises the following steps: preparing coated modified ammonium polyphosphate; modified expanded perlite; preparing a flame-retardant outer-layer fabric; preparing a heat insulation core layer fabric; preparing an antibacterial inner layer fabric; and bonding. The flame-retardant heat-insulating fabric for the fire-fighting clothes comprises a flame-retardant outer-layer fabric, a heat-insulating core-layer fabric and an antibacterial inner-layer fabric, ammonium polyphosphate is dispersed in deionized water, polyethyleneimine is added under the acidic condition, amino on the polyethyleneimine and ammonia ions of the ammonium polyphosphate are subjected to an ion exchange reaction, and the flame-retardant heat-insulating fabric for the fire-fighting clothes is obtained. According to the flame-retardant outer-layer fabric, ammonium polyphosphate is preliminarily coated, then a hydroxyethylidene diphosphonic acid solution is added for a salt forming reaction, coated modified ammonium polyphosphate with a core-shell structure is prepared, the coated modified ammonium polyphosphate and polyester powder are mixed and granulated, then the flame-retardant outer-layer fabric is prepared, and the flame-retardant property of the flame-retardant outer-layer fabric can be effectively improved.

The invention discloses a high-performance green and environment-friendly single-component polymer cement waterproof dry blend and a preparation method thereof, and relates to the technical field of building materials, the high-performance green and environment-friendly single-component polymer cement waterproof dry blend comprises the following components: an inorganic cementing material, latex powder, graded quartz sand, a functional filler, cellulose ether, an organic silicon defoamer, a polycarboxylic acid water reducer and compound fibers; the functional filler is modified waste glass powder prepared through mechanical activation and silanization modification; the compound fiber is a mixture of modified glass fiber and modified polypropylene fiber; the preparation of the modified glass fiber comprises tannic acid and polyethyleneimine combined modification and graphene oxide modification, and the preparation of the modified polypropylene fiber comprises plasma activation. The polymer cement waterproof dry blend prepared by the method adopts the glass powder to replace natural mineral filler, is energy-saving and environment-friendly, and the cement matrix is modified by various fibers, so that the prepared polymer cement dry blend is excellent in comprehensive performance.

The invention discloses a cellulose-based in-situ growth MOF composite aerogel preparation method, which comprises: mixing cellulose powder and dimethylimidazole, adding into deionized water, gradually adding cobalt nitrate and zinc chloride, uniformly stirring, carrying out a heating reaction, adding polyethyleneimine, uniformly stirring, adding a cross-linking agent, carrying out cross-linking, washing, and drying to obtain the cellulose-based in-situ growth MOF composite aerogel. The composite hydrogel is obtained; and finally, sealing, heating and baking the composite hydrogel, washing and drying to obtain the composite aerogel. According to the method, the MOF is synthesized on the cellulose in situ under the low-temperature water phase condition, the composite aerogel containing the MOF material is obtained, the MOF material synthesized on the cellulose in situ has good porosity and particle size and uniformly covers the cellulose, loss of active components is avoided, the problem that the MOF material is prone to agglomeration is solved, and the preparation method is suitable for industrial production. Meanwhile, the adsorption performance is also effectively improved, the adsorbent has good affinity with water, and the surface can be promoted to adsorb three metal ions of vanadium, molybdenum and nickel at the same time.

The invention discloses a temperature / CO2 dual-response zwitterionic hydrogel profile control agent, which is prepared by taking a monomer A, a monomer B and a monomer C as raw materials, adding a cross-linking agent and an initiator, and carrying out polymerization reaction in a water medium. The monomer A is selected from any one of acrylamide, acrylic acid and 1-vinyl-2-pyrrolidone; the monomer B is selected from any one of [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, 2-methacryloyloxyethyl phosphorylcholine and 3-((2-(methacryloyloxy) ethyl) dimethylamino) propionic acid inner salt; and the monomer C is selected from any one of 2-(dimethylamino) ethyl methacrylate, dimethylamino propyl methacrylamide and polyethyleneimine. The profile control agent has double swelling mechanisms, has outstanding temperature and salt resistance, resists 220000 mg / L of mineralization water, is suitable for high-salt reservoirs, and is good in long-term aging property.

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention relates to the technical field of flame-retardant coatings, and discloses a nano-material-containing super-hydrophilic flame-retardant coating and a preparation method thereof, and the nano-material-containing super-hydrophilic flame-retardant coating comprises modified epoxy resin, polyethyleneimine, a defoaming agent, a solvent and water. The modified epoxy resin is grafted and modified by aminated nano silicon dioxide, pyridine groups, amino groups and triphenyl phosphate, the aminated nano silicon dioxide and the triphenyl phosphate can effectively improve the flame retardance, the pyridine groups can play a role in corrosion prevention, the shelf life is prolonged, and the hydrophilic property of the coating is greatly improved through multi-amination. The water-based flame-retardant coating has excellent hydrophilicity, heat resistance, acid resistance, alkali resistance and flame retardance, is suitable for most production and living environments, is simple and convenient in production process, and is convenient to widely popularize.

The invention provides an additive formula of a copper foil for a lithium ion battery and an electrolytic copper foil thereof. According to the formula, the tensile strength of the copper foil can be accurately regulated and controlled to 300-800 MPa. The formula comprises a brightening agent, a leveling agent, a displacement agent and a key component high-resistance agent, and is prepared from sodium dithiodipropane sulfonate (SPS), sodium 3-mercaptopropanesulfonate (MPS), hydroxyethyl cellulose (HEC), polyacrylamide (PAM), 2-mercaptobenzimidazole, chloride ions, polyethyleneimine and derivatives thereof, diethyl thiourea and thiazolidinethione-4-carboxylic acid (TTCA). The high-resistance agent is prepared from the following components: sodium dithiodipropane sulfonate (SPS), sodium 3-mercaptopropanesulfonate (MPS), hydroxyethyl cellulose (HEC), polyacrylamide (PAM), 2-mercaptobenzimidazole, chloride ions, polyethyleneimine and derivatives thereof, diethyl thiourea and thiazolidinethione-4-carboxylic acid (TTCA). By optimizing the formula, the tensile strength can be accurately adjusted only by adjusting the flow of the additive and the dosage of the high-resistance agent. The invention further relates to electrolysis parameters matched with the additive formula, so that the production requirements of copper foils with different specifications are met, and the mechanical property, the surface quality and the electrochemical property are improved.

The invention provides a pharmaceutical wastewater treatment process. The pharmaceutical wastewater treatment process comprises the following steps: A1, pretreatment, A2, adsorption treatment, A3, oxidation treatment and A4, filtration treatment. In the step A2, a composite adsorbent comprising the following raw materials: attapulgite, activated carbon, carbon nanotubes, 4-carboxyphenylboronic acid, polyethyleneimine, sodium dithiocarbamate, epoxy resin E-44, deionized water and modified nano zero-valent iron is used, and self-repairing is realized through dynamic chemical bonds such as boric acid ester bonds, imine bonds and thiol-disulfide bonds; the adsorbent can be self-repaired during microscopic damage, so that the service life is prolonged, and relatively high adsorption capacity is kept. In the step A3, a gel microsphere oxidant comprising the following raw materials: hydrogen peroxide, potassium persulfate, copper-iron sulfide, nitrogen-doped carbon quantum dots, sodium alginate powder, sodium polyacrylate and a phosphate buffer solution is used, and efficient degradation is realized through a synergistic mechanism of free radical oxidation, non-free radical oxidation and photocatalysis.

The invention relates to the technical field of biopolymer materials, in particular to a preparation method and application of a cationic polymer gene vector with a fluorinated end group. The invention provides a cationic polymer with a fluorinated end group. The structure of the cationic polymer is shown in the specification. According to the method, a fluorinated group is introduced through a fluorinated initiator by a one-step method to initiate synthesis of various terminal group fluorinated linear polyethyleneimine F-PEI with different molecular weights, the gene transfection efficiency is improved by introduction of the fluorine group, and high-efficiency DNA transfection is realized. The gene vector can achieve an efficient transfection effect in the cell transfection process, the toxicity generated to cells in the transfection process is small, gene molecules can be effectively and safely conveyed into the cells, and the gene transfection vector has the advantages of being efficient, low in toxicity, low in price, easy to synthesize and the like. The method has the advantages of simple reaction, easily available raw materials, low preparation cost, easily controlled molecular weight, high yield and simple post-treatment, and is suitable for large-scale production. # imgabs0 #

The invention relates to the technical field of plastic films, in particular to a preparation method of an environment-friendly plastic bag, which comprises the following steps: S1, mixing polyethyleneimine, ammonium polyphosphate and a first solvent, then carrying out primary reaction, cooling to room temperature, filtering, washing and drying to obtain a solid-phase substance; s2, tannic acid and a second solvent are mixed, tris (hydroxymethyl) aminomethane is added, the pH is adjusted to 7-9, then hydrogen peroxide is added, after a secondary reaction, the solid-phase matter is added for a third reaction, filtering, washing and drying are conducted, and a heat-resistant enhancer is obtained; s3, the modified polylactic acid, the heat-resistant enhancer and the auxiliaries are put into a high-speed mixer to be mixed to be uniform, then the mixture is added into a double-screw extruder to be granulated, then film blowing is conducted through an air blower, and the environment-friendly plastic bag is obtained. The environment-friendly plastic bag provided by the invention has excellent mechanical properties, thermal stability and ultraviolet resistance.

The invention provides an MXene-derived skeleton composite phase-change material with strong electromagnetic shielding performance, which is a composite phase-change material with a stable shape, which is obtained by taking MXene-derived aerogel as a skeleton material and carrying out vacuum impregnation and adsorption on a molten phase-change material. Wherein the MXene-derived aerogel is an aerogel-based framework material obtained by adding chitosan quaternary ammonium salt, polyethyleneimine and carbon nanotubes into an MXene aqueous dispersion, uniformly dispersing to obtain a mixed solution, directionally and rapidly freezing in liquid nitrogen, carrying out vacuum freeze drying and carrying out high-temperature carbonization. The composite phase change material not only has high thermal conductivity and high latent heat, but also has an EMI (Electro-Magnetic Interference) shielding function and electric heating, photo-thermal and magnetic-thermal conversion capabilities, the highest thermal conductivity is 0.64 W / m.K, the EMI shielding effectiveness is up to 38.28 dB, and the composite phase change material has wide application prospects in electric heating, photo-thermal, magnetic heating, energy storage and electronic equipment thermal management.

The invention provides a polymer composite gel for heavy metal ion adsorption and a preparation method and application thereof, diatomite DE, chitosan CS, polyethyleneimine PEI and sodium alginate SA are used as raw materials, and polymer modification crosslinking is promoted through an ionic crosslinking method to form the composite gel. Compared with the prior art, SA is a biodegradable natural polysaccharide material, contains rich hydroxyl and carboxyl functional groups and is used as a controllable modification site, DE is used as an inorganic clay material, has a layered porous structure and contains rich active sites, and CS and PEI polymer surfaces have rich amino and hydroxyl groups and are used as ion adsorption sites. Meanwhile, PEI is used as a nucleation site and an ionic cross-linking agent to promote material modification and cross-linking to form composite gel. The composite gel is used as an ion adsorbent, can be adsorbed through chemical chelation between functional groups and ions, and can also be physically adsorbed through a porous structure, so that the composite gel shows efficient ion adsorption performance.

The invention discloses a preparation method of a self-adaptive anti-electromagnetic interference composite material, which comprises the following steps: firstly, etching a Ti3AlC2 precursor through a LiF / HCl solution to prepare few-layer MXene powder; the preparation method comprises the following steps: preparing a carbon nanotube / Ti < 3 > C < 2 > T < x > MXene powder / chitosan / polyethyleneimine dispersion liquid through a chemical crosslinking method; and finally, carrying out a freeze drying process to obtain the carbon nanotube / Ti < 3 > C < 2 > T < x > MXene powder / chitosan / polyethyleneimine composite aerogel. The carbon nanotube / Ti < 3 > C < 2 > T < x > MXene powder / chitosan / polyethyleneimine composite aerogel prepared by the preparation method disclosed by the invention is excellent in electromagnetic shielding performance and high in absorption capacity, and can meet the application requirements in the fields of aerospace, electronic packaging and the like. Meanwhile, the strain sensing capacity is achieved, the sensitivity is outstanding under different strains, repeatability and linearity are good, the capacity of distinguishing different strain magnitudes is achieved, and the strain sensor is suitable for scenes needing dynamic and quantitative strain monitoring. The composite material has efficient electromagnetic shielding performance and excellent sensing performance, and has a wide application prospect in practical application.

The invention belongs to the technical field of phase-change composite materials, and in order to solve the problem that thermal management and electromagnetic shielding functions of the phase-change composite materials cannot be compatible, polyethyleneimine (PEI) and carboxymethyl cellulose (CMC) are added into a titanium carbide (Ti3C2Tx) nanosheet (MXene) aqueous dispersion to be uniformly dispersed to obtain a mixed solution, directional freezing is performed in liquid nitrogen, vacuum freeze drying is performed to obtain an MXene-based aerogel skeleton MCP, and the MXene-based aerogel skeleton MCP is prepared into the phase-change composite material. The phase-change composite material with a stable shape is obtained by vacuum impregnation and adsorption of a phase-change material in a molten state, not only has excellent thermal conductivity and electrical conductivity, but also has stable electrothermal conversion energy storage capacity and good electromagnetic shielding performance, and provides opportunities for meeting multi-scene response and practical application of multifunctional composite materials.

The invention discloses a preparation method and application of a cross-basement membrane back-diffusion in-situ growth ZIF modified polyvinyl polyamide positively charged nanofiltration membrane. The preparation method comprises the following steps: firstly, coating a support membrane by using an organic phase solution containing a trimesoyl chloride monomer; the preparation method comprises the following steps: preparing a supporting basement membrane, pouring a mixed aqueous solution of polyethyleneimine and zinc nitrate hexahydrate on the supporting basement membrane to carry out interfacial polymerization, overturning the supporting basement membrane after polymerization, pouring a 2-methylimidazole aqueous solution on the surface, carrying out cross-basement membrane in-situ growth of ZIF, and carrying out heat treatment and alcohol activation on the membrane after growth. According to the method disclosed by the invention, ZIF particles can be more uniformly generated in the membrane, interface gaps caused by MOF agglomeration are avoided, a high-positive-electricity layer can be prepared by combining a reverse-phase interface polymerization method in which polyethyleneimine is used as a water-phase monomer, and the water permeation flux is greatly improved while high interception of magnesium ions is maintained; the problem of mutual restriction of permeability and selectivity is solved, the process is simple, and preparation conditions are mild.

Disclosed herein is a composite material in the form of a bead, the beads are either formed from: a polyethyleneimine, graphene oxide, and zeolite nanoparticles, where the bead has a hollow core and a layered shell structure comprising a plurality of layers of graphene oxide and a plurality of layers of polyethyleneimine, where any two layers of graphene oxide are separated by a layer of polyethyleneimine and the zeolite nanoparticles are intercalated between the plurality of graphene oxide layers, and the polyethyleneimine is crosslinked by a negatively charged crosslinking agent; or a polyethyleneimine and graphene oxide, where the bead has a hollow core and a layered shell structure comprising a plurality of layers of graphene oxide and a plurality of layers of polyethyleneimine, where any two layers of graphene oxide are separated by a layer of polyethyleneimine, and covalent bonds are formed between the polyethyleneimine and the graphene oxide to crosslink the polyethyleneimine to the graphene oxide. Also disclosed herein are methods of using the composite material and its manufacture.

The present invention discloses a high thermal conductivity rubber material and a preparation method thereof, and relates to the technical field of rubber production, the high thermal conductivity rubber material comprises a rubber matrix, modified carbon black, a vulcanizing agent, a composite accelerator, an anti-aging agent, zinc oxide, stearic acid, white carbon black, montmorillonite and aramid pulp according to a weight ratio of 100: (40-60): (1.5-3): (2-4): (1-3): (3-8): (1-3): (10-20): (5-15): (3-8); the modified carbon black is prepared by reacting a composite modifier solution prepared from a silane coupling agent, sodium alginate, ammonium polyacrylate, tea polyphenol, polyethyleneimine, nano aluminum oxide and deionized water with carbon black; the composite accelerant is prepared by carrying out pre-dispersion treatment on N-cyclohexyl-2-benzothiazole sulfenamide, tetramethylthiuram disulfide, a rare earth complex and nano zinc oxide. The prepared high-thermal-conductivity rubber material is good in mechanical property and thermal conductivity.

The invention relates to the technical field of optical adhesion agents, and discloses a water-resistant polyvinyl alcohol optical adhesion agent and a preparation method and application thereof, and the water-resistant polyvinyl alcohol optical adhesion agent comprises the following components in parts by weight: 88-95 parts of deionized water, 4-7 parts of polyvinyl alcohol, 0.1-2 parts of lithium magnesium stone powder, 0.1-2 parts of glutaraldehyde, 0.1-0.5 part of metal salt and 0.1-2 parts of polyethyleneimine. The water-resistant polyvinyl alcohol optical adhesive has the advantages that the water resistance of a polarizing plate can be effectively enhanced by the prepared water-resistant polyvinyl alcohol optical adhesive due to the laminated assembly trend and the strong hydrogen-bond interaction of the lithium magnesium stone powder and binary, ternary and multi-element chemical bonds formed by glutaraldehyde, polyethyleneimine and metal salt with acetoacetyl functional groups in the polyvinyl alcohol respectively.

The invention discloses a tough and mildew-proof formaldehyde-free soybean protein adhesive as well as a preparation method and application thereof, defatted soybean powder is taken as a main agent, an epoxy compound is taken as a cross-linking agent, polyethyleneimine modified chitosan is used for synthesizing a modifier to prepare the modified soybean protein adhesive, and a compact cross-linked network structure is constructed, so that the toughness and mildew-proof formaldehyde-free soybean protein adhesive is obtained. According to the soybean protein-based adhesive, the performance of the soybean protein-based adhesive is successfully improved, the soybean protein-based adhesive is high in bonding strength, relatively good in water resistance and good in mildew resistance, the production process is simple and convenient, the production cost is greatly reduced, chitosan and polyethyleneimine are subjected to graft modification, the living environment of mildew is destroyed, and the mildew resistance of the soybean protein-based adhesive is improved. The epoxy compound and the chitosan-polyethyleneimine are compounded and cooperated, so that a stable net-shaped cross-linked structure is formed in the adhesive, and the water resistance and the mildew-proof capability of the adhesive are greatly improved.

The invention provides high-capacity and high-compaction lithium iron phosphate as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. Specifically, an iron source, a lithium source, a carbon source, a dispersing agent, an additive and water are mixed and ground, and a first spray material is obtained after spray drying; mixing and grinding a second iron source, a second lithium source, a second carbon source, a second additive and water, and performing spray drying to obtain a second spray material; fully mixing the two spraying materials, calcining and crushing to obtain lithium iron phosphate; wherein the dispersing agent is prepared from one of polyurethane, polyaspartic acid or a polyhydric alcohol-polyethylene imine block copolymer. According to the preparation method, by introducing the specific dispersing agent, the phenomenon of over-burning fusion can be effectively avoided, and a small-particle material with uniform size is obtained, so that the electrochemical performance is improved; and the mixture is mixed with the spraying material without the dispersing agent, so that the compaction density is effectively improved, and the high-capacity and high-compaction lithium iron phosphate is obtained.

The invention provides catalyst slurry and a preparation method thereof, a membrane electrode and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production, and the catalyst slurry comprises a catalyst, proton exchange resin, a dispersing agent and a solvent. Wherein the dispersing agent comprises at least one of polyvinylpyrrolidone, polyvinyl alcohol, polyethyleneimine, hexadecyl trimethyl ammonium bromide and hydroxyethyl cellulose. According to the catalyst slurry provided by the embodiment of the invention, sedimentation can be slowed down, the stability of the catalyst slurry is improved, the uniformity of the loading capacity of a catalyst in different membrane electrodes prepared from single-batch catalyst slurry is ensured, and the stability is improved.

The invention discloses a perovskite solar cell with an organic polymer molecule modified perovskite layer, and belongs to the technical field of photovoltaic solar materials. The structure of the device sequentially comprises a conductive glass layer, a hole transport layer, a perovskite layer, a perovskite modification layer, an electron transport layer and a metal electrode layer from bottom to top. The structural formula of the perovskite layer is FAxMAyPbI3, x ranges from 0.7 to 0.9, y ranges from 0.1 to 0.3, and the perovskite modified layer comprises linear polyethyleneimine. The linear polyethyleneimine has a molecular structure as shown in a formula (1). Hydroxyl in linear polyethyleneimine can be used as a Lewis base to interact with uncoordinated Pb < 2 + > on the grain boundary and the surface of perovskite, so that the lead ion defect can be effectively passivated; the secondary amine group can form a hydrogen bond with unsaturated I <-> to inhibit ion migration, and meanwhile, linear polyethyleneimine protects a perovskite layer from being influenced by water molecules through a hydrophobic long alkyl chain, so that the photoelectric conversion efficiency and stability of the perovskite solar cell are improved. # imgabs0 #

The invention relates to a monovalent ion selective cation exchange membrane and a preparation method and application thereof, and the preparation method comprises the following steps: mixing polyethyleneimine and a cross-linking agent to obtain a pre-polymerized solution; coating the surface of a cationic base membrane with the pre-polymerized solution, and then heating to carry out a cross-linking reaction, so as to obtain a base membrane after surface cross-linking; and soaking the base membrane subjected to surface crosslinking in an oil phase solution of acyl chloride monomers, and carrying out interfacial polymerization reaction to obtain the monovalent ion selective cation exchange membrane. Through the synergistic effect of a three-dimensional network structure constructed through cross-linking reaction and a selective separation layer constructed through interfacial polymerization, the Li < + > / Mg < 2 + > separation coefficient can be increased, and long-acting and stable operation is achieved.

The invention belongs to the technical field of oilfield chemistry, and particularly relates to application of a hyperbranched zwitterionic polymer in high-temperature and high-salinity drilling fluid. The hyperbranched zwitterionic polymer is prepared by carrying out Michael addition reaction on polyethyleneimine and a monomer which is neutralized by alkali and contains double bonds and sulfonic acid groups; the polymer has a hyperbranched structure, and the amphoteric ion characteristic that an amino group from polyethyleneimine on a molecular chain and a sulfonic acid group from a monomer form an inner salt structure; the hyperbranched zwitterionic polymer is used as an inhibitor and a viscosity reducer of the drilling fluid. According to the hyperbranched zwitterionic polymer provided by the invention, the salt tolerance and high-temperature stability of the polymer are enhanced by introducing a sulfonate group; the polymer is endowed with low viscosity and high adsorption capacity through a hyperbranched structure, the viscosity of the drilling fluid can be effectively reduced, and clay hydration is inhibited; clay particles are stabilized through electrostatic interaction by zwitterionic characteristics, and the rheological property of the drilling fluid is optimized.

The invention belongs to the technical field of coke oven gas purification treatment, and particularly discloses a method for removing hydrogen sulfide in coke oven gas through photocatalysis, generation of oxygen vacancies is promoted by adopting a synthesis concept of synergistic effect of silver doping and polyethyleneimine, polyethyleneimine provides an alkaline condition on one hand, lone electron pairs on nitrogen are coordinated with zinc on the other hand, and the hydrogen sulfide in the coke oven gas is removed through photocatalysis. The preparation method comprises the following steps: by taking H2S and polyethyleneimine as raw materials, generating abundant oxygen vacancies under the synergistic effect of the H2S and silver, preventing agglomeration of generated ZnO and increasing reaction sites by taking polyethyleneimine as a surfactant, and then promoting a cascade reaction between ZnO < 1-x > and H2S by taking abundant oxygen vacancies, so that a 1D / 3D-ZnS / ZnO heterojunction is generated in situ to further reduce recombination of photo-generated electron holes; the catalyst converts H2S into elemental sulfur through photo-induced electrons and holes, and a carbon disulfide solution is used for cleaning the catalyst to realize regeneration of the catalyst. The method provided by the invention not only improves the removal efficiency of H2S, but also reduces the operation cost and reduces environmental pollution.

The invention discloses a polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material and a preparation method thereof, and belongs to the field of polymer composites.The preparation method comprises the steps that a resin matrix and filler are filled into a mold to be sintered, the resin matrix is sulfonated polyetheretherketone, the filler comprises modified carbon fibers and nano-silicon dioxide, and the modified carbon fibers and the nano-silicon dioxide are sintered to obtain the polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material; the modified carbon fiber is prepared by taking carbon fiber, catechol and polyethyleneimine as raw materials in a Tris buffer solution. The hydration lubrication performance of a resin matrix is improved through sulfonated polyetheretherketone, the hydrophilic property is enhanced, a polyphenol coating is formed through self-polymerization reaction on the surfaces of the carbon fibers, the adhesion performance of the surfaces of the fibers is improved through the pi-pi stacking effect, and the interface bonding force between the carbon fibers and the modified resin matrix is enhanced; the nano silicon dioxide is introduced to modify the matrix of the composite material, so that not only is the overall wettability of the material optimized, but also the mechanical property and the wear resistance are effectively improved, and the final composite material has the characteristics of high strength and low friction.

The invention provides an anti-icing film with photo-thermal and ice nucleation capabilities and a preparation method of the anti-icing film. The anti-icing thin film is a multi-phase multi-component hybrid thin film and is prepared from polyethylene, a polyacrylic acid-polyethyleneimine compound, ferroferric oxide nano particles and graphene oxide nano sheets. Wherein the polyacrylic acid-polyethyleneimine compound is dispersed in a continuous phase of a polyethylene matrix in an island-shaped structure, the ferroferric oxide nanoparticles are dispersed in the continuous phase of the polyethylene matrix and on a'sea-island 'interface, an excellent photo-thermal function is given, and the graphene oxide nanosheets are adsorbed on the outer surface of a phase region of the polyacrylic acid-polyethyleneimine compound. As an ice nucleation site, water vapor in the environment is induced to freeze, meanwhile, the vapor pressure of water vapor in the surrounding area is reduced, and freezing of the water vapor on the surface of the polyethylene phase area is inhibited. The anti-icing film provided by the invention can induce environmental water vapor to form a discontinuous ice layer on the surface of the film, reduce the ice adhesive force between the ice layer and the film, and enable the ice layer to be easily removed under the photo-thermal action, thereby achieving the purpose of preventing and removing ice.

The application relates to a modified PA56 fabric with long-acting flame-retardant effect and a preparation method thereof, wherein hyperbranched polyethylene imine and ammonium polyphosphate are grafted to obtain hyperbranched modified ammonium polyphosphate, the PA56 fabric is dipped in a hyperbranched modified ammonium polyphosphate solution and dried and solidified, dipped in a melamine flame-retardant finishing agent, then dipped in an acetic acid buffer solution, and dried to obtain the modified PA56 fabric with long-acting flame-retardant effect. Different from the prior art, the hyperbranched modified ammonium polyphosphate is loaded on the PA56 fabric to form a crosslinked network structure; the polyethylene imine is loaded on the PA56 fabric; the ammonium polyphosphate is connected with the polyethylene imine through grafting modification; the melamine is connected with the ammonium polyphosphate through weak bonds such as electrostatic interaction, hydrogen bond and P-N bond, and is wrapped in the outer layer of the fabric, so that the durable flame-retardant effect of the modified PA56 fabric is realized, and the strength of the modified PA fabric is improved.

The invention discloses a fluorescent probe for rapidly and sensitively detecting tetracycline antibiotics and a preparation method and application thereof.The preparation method comprises the steps that citric acid is dissolved in ultrapure water, polyethyleneimine is added under vigorous stirring till a reagent is completely dissolved, then a mixed solution is transferred into a high-pressure kettle for a hydrothermal reaction, and after natural cooling is conducted to the room temperature, the fluorescent probe is obtained; dialyzing the obtained solution through a dialysis bag to obtain a BCDs solution; europium chloride hexahydrate and trimellitic acid are ultrasonically dissolved in N, N-dimethylformamide, then the prepared BCDs solution is added and stirred, the stirred liquid is transferred into a high-pressure kettle for a solvothermal reaction, after the liquid is naturally cooled to the room temperature, a product is washed with absolute ethyl alcohol and then dried in a vacuum drying oven, and the BCDs / Eu-MOF probe is obtained. The method is suitable for detecting TCs in water and food such as milk and honey, and a simple, rapid and sensitive strategy is provided for visual field quantitative detection of TCs.

The invention discloses a polyurethane / cellulose acetate composite fiber membrane, a preparation method and application, and belongs to the technical field of fiber membranes, the surface of the polyurethane / cellulose acetate composite fiber membrane is grafted with a polyethyleneimine chain segment; the raw materials for surface grafting comprise a polyurethane / cellulose acetate composite fiber membrane, polyethyleneimine and dopamine hydrochloride in a mass ratio of 1: (20-30): (0.4-0.8). The polyurethane / cellulose acetate composite fiber membrane has a bicontinuous structure and is high in mass transfer efficiency, and a regular fiber structure and a relatively high specific surface area provide a good physical basis for subsequent grafting of polyethyleneimine chain segments. The dopamine hydrochloride can be self-polymerized on the surface of the composite fiber membrane to form polydopamine, so that the surface activity and the adhesive force of the composite fiber membrane are enhanced, the grafting rate of polyethyleneimine is improved, and the polyethyleneimine can remarkably improve the adsorption capacity of the composite fiber membrane on heavy metal ions through coordination, ion exchange and physical adsorption.