267 results about "Ethylene imine" patented technology

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 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 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 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 fiber composite material based on hydrogen bond self-repairing and conductive self-diagnosis and a preparation method of the fiber composite material, and belongs to the technical field of intelligent diagnosis and self-repairing fiber reinforced resin-based composite materials and preparation of the intelligent diagnosis and self-repairing fiber reinforced resin-based composite materials. According to the method, the problem that the self-healing effect cannot be timely obtained on the internal damage of the material due to the fact that the damage area cannot be accurately positioned and identified before the damage of the existing fiber composite material is repaired is solved. According to the invention, a quantum tunnel effect and a three-dimensional conductive skeleton are constructed by using a micro-nano multi-stage conductive filler composed of a nano carbon nanotube, micron flake graphite powder and unidirectional short carbon fiber, a damage occurrence position is realized based on an electro-mechanical corresponding relation, a self-sensing function is given, and accurate positioning of the damage is realized (the error is less than 1mm). A multiple reversible hydrogen bond system formed by acrylamide, polyethyleneimine and epoxy resin is further utilized, the self-repairing effect of the composite fiber material is achieved, and the test result shows that the self-repairing efficiency of at least 90% or above is achieved at the normal temperature.

The invention belongs to the technical field of artificial veneers, and particularly relates to a fragrance-releasing blue-light-resistant microcapsule and a preparation method thereof, impregnated bond paper of the fragrance-releasing blue-light-resistant microcapsule, a fragrance-releasing blue-light-resistant ecological board and a preparation method of the fragrance-releasing blue-light-resistant ecological board. The technology aims at solving the problems of indoor blue light harm and air quality, and the problems that in the prior art, stable coexistence of a fragrance releasing component and an anti-blue-light component is difficult, and the technology is not compatible. The core is to prepare a multifunctional microcapsule through a unique interfacial polymerization and Schiff base in-situ reaction synchronous process: compound plant essential oil is taken as a core material, a vanillin-polyethyleneimine Schiff base conjugated structure is generated in situ in a wall material, and nanoparticles are cross-linked and fixed, so that a polyurethane / polyurea wall material is formed. The microcapsule is added into an adhesive layer of impregnated bond paper, and then is compounded with a base material through hot pressing to prepare the ecological board. The fragrance releasing and blue light resisting functions are successfully integrated on the board body, the effects that the blue light absorptivity at the wave band of 400-450 nm is larger than or equal to 70%, the formaldehyde release amount is smaller than or equal to 0.025 mg / m, and the fragrance is lasting are achieved, and the technology is highly compatible with an existing production line.

The invention discloses a sodium ion battery electrolyte and a sodium ion battery, the preparation raw materials of the electrolyte comprise an electrolyte, an organic solvent and a composite additive, the preparation raw materials of the electrolyte comprise a sodium salt and modified graphite, the preparation raw materials of the modified graphite comprise graphite, dopamine hydrochloride, polyethyleneimine, Sb2O3 and BiCl3, the composite additive is prepared from trimethylsilyl trifluoromethanesulfonate, N-methyl pyrrolidone, vinylene carbonate and nano silicon dioxide. Through synergistic compounding, a high-stability three-dimensional ionic conduction network is constructed, so that the electrolyte has a wide electrochemical window and high ionic conductivity.

The invention discloses a preparation method and application of a composite phase change material functional current collector, and relates to the technical field of functional current collectors. The composite phase change material obtained by compounding polyethylene glycol, graphene oxide, hydroxypropyl methyl cellulose and polyethyleneimine is roller-coated on the surface of the current collector, and is applied to a battery material to realize thermal management at high and low temperatures; the preparation method comprises the following specific steps: mixing and heating graphene oxide and polyethyleneimine to obtain polyethyleneimine modified graphene oxide, heating and melting polyethylene glycol, adding hydroxypropyl methyl cellulose, stirring, adding the polyethyleneimine modified graphene oxide, and continuously stirring to obtain the composite phase change material.

The application provides a preparation method of a Chlorella-arsene composite drug delivery system and application thereof. The application prepares arsene nanosheets (ANs) through a liquid phase stripping method, and obtains catechol-polyethyleneimine nanoparticles (CA-PEI) through oxidation self-polymerization. The ANs and the CA-PEI are charge-absorbed to form CA-PEI loaded with ANs (CA-PEI@ANs), and then charge-absorbed with protein nucleus Chlorella (CP), so that a Chlorella-arsene composite drug delivery system (CP@CA-PEI@ANs) is successfully constructed. The preparation operation of the drug delivery system is simple, and the reproducibility is good, and the drug delivery system has a good application prospect. The protein nucleus Chlorella is used as a drug delivery carrier, so that the problems of high cost and complex synthesis process commonly existing in a targeted delivery carrier are solved, and the application has good tumor targeting effect, and is beneficial to better drug efficacy.

This invention discloses the preparation of a Janus composite membrane with a sandwich structure and its application in volume reduction of nuclear power plant decontamination wastewater. The Janus composite membrane consists of a hydrogel-like tannic acid / polypropylene glycol (PPG / TA) top layer, a highly adhesive biomimetic intermediate layer formed by polydopamine / polyethyleneimine / chitosan (PDA / PEI / CS), and a hydrophobic polytetrafluoroethylene (PTFE) substrate. Compared with traditional PTFE membranes, when the Janus composite membrane of this invention is applied to volume reduction of nuclear power plant decontamination wastewater, the asymmetric wettability of the Janus composite membrane prevents the foaming liquid of the decontamination wastewater from directly contacting the PTFE substrate and increases the capillary pressure at the membrane-liquid interface, thereby protecting its hydrophobic properties and continuously transporting water vapor. Compared with the monotonous negatively charged layer of the original commercial PTFE membrane, the rich hydrophilic functional groups of the modified layer of the Janus composite membrane further reduce the permeation rate of nuclides and other pollutants, with a nuclide rejection rate of over 99.95% and a permeate recovery rate of over 85%.

The invention discloses a polyethyleneimine / nitrogen-doped titanic acid nanotube composite material. The composite material comprises a nitrogen-doped titanic acid nanotube and polyethyleneimine bonded with the nitrogen-doped titanic acid nanotube through a hydrogen bond, the invention also discloses a preparation method of the polyethyleneimine / nitrogen-doped titanic acid nanotube composite material, and the preparation method specifically comprises the following steps: simultaneously adding the titanic acid nanotube and a polyethyleneimine solution into an ammonium salt solution, fully reacting, carrying out solid-liquid separation on the material, and carrying out heat treatment on a solid product obtained after separation to obtain the polyethyleneimine / nitrogen-doped titanic acid nanotube composite material. The composite material disclosed by the invention can be used for efficiently removing CBZ pollutants in a water body by coupling a photocatalysis technology with an enzyme-like catalysis technology.

A method for treating a pathogen, comprising the steps of: (1) providing a polyethylenimine in a solution, the polyethylenimine comprising a total cationic charge of protonated secondary amines of the polyethylenimine, the solution comprising anionic counterions associated with the protonated secondary amines; (2) tuning a protonated site of the polyethylenimine, in a formulation of the solution containing ions, to an activity coefficient (γ) in a range of 0.93 to 0.999; (3) forming from the formulation an antibacterial film, the antibacterial film comprising a mean thickness of less than 5 μm and the total cationic charge of the protonated secondary amines in a range of 0.1 to 1.8 C / in2; and (4) inactivating greater than 99% of first bacteria within less than five minutes of contact with the antibacterial film.

This invention discloses a method for preparing a self-healing, antibacterial dynamic hydrogel and its coating application. The method includes: 1. Reacting konjac glucomannan with sodium periodate to achieve aldehyde functionalization, and mixing it with sodium alginate powder to prepare a precursor polymer solution A; 2. Mixing an acylhydrazide or hydroxylamine small molecule crosslinking agent with an aminoglycoside drug to prepare an amino crosslinking agent solution B, and preparing a calcium salt ionic crosslinking agent solution C; 3. Mixing the three solutions and allowing them to stand to obtain a hydrogel. The application involves coating a hydrogel mixture solution onto a biodegradable metal surface after preparing a polyethyleneimine auxiliary layer and then gelling it. This invention utilizes aldehyde-functionalized oxidized konjac glucomannan and two crosslinking agents to form acylhydrazone, oxime, and imine bond networks, endowing the hydrogel with self-healing, self-responsive, and long-term antibacterial properties. The hydrogel of this invention improves the biocompatibility, antibacterial properties, and stability of biodegradable metal substrates, making it suitable for biodegradable implantation applications.

Provided in the present invention are an antimicrobial whitening composition, a white synthetic leather substrate and a preparation method therefor, and an antimicrobial synthetic leather. The antimicrobial whitening composition comprises a cationic antimicrobial agent, an antimicrobial organic substance and a solvent, wherein the cationic antimicrobial agent comprises at least one of a polymeric quaternary ammonium compound, polyethyleneimine, chitosan, a biguanide compound and a polymeric biguanide; and the antimicrobial organic substance comprises at least one of a terpene compound and a derivative thereof, a phenolic compound, an essential oil, an antifungal agent, a preservative and a disinfectant. The man-made leather prepared by means of the antimicrobial whitening composition of the present invention has good performance in terms of both long-lasting antimicrobial properties and maintaining a high whiteness.

The invention discloses a phenylboronic acid affinity deoxynojirimycin imprinted polymer nano-material as well as a preparation method and application thereof, and belongs to the fields of nano-material preparation and natural compound extraction and separation. Phenylboronic acid modified nano silica gel is used as a carrier, deoxynojirimycin is used as a template molecule, dopamine is used as a cross-linking agent, a polyethyleneimine hyperbranched strategy is further combined, a deoxynojirimycin molecularly imprinted polymer (MIPs-PEI) with boric acid affinity and pH response characteristics is constructed, and hyperbranched modification remarkably improves hydrophilicity and boric acid affinity sites of the material. The synthesized MIPs-PEI has good adsorption performance on deoxynojirimycin and can effectively enrich deoxynojirimycin in mulberry leaves, and the natural hypoglycemic alkaloid deoxynojirimycin is extracted in a green mode through the method.

The invention provides an iron-based nano material, a preparation method and application, the material comprises magnetic iron oxide nano particles and a functional modification layer on the surface, the magnetic iron oxide nano particles are Fe3O4, the particle size is 10-30 nm, and the magnetic iron oxide nano particles have specific oxygen vacancy concentration, 337 nm laser absorptivity and saturation magnetization; the functional modification layer is an amino-containing polymer layer, such as a polydopamine or cysteine-polyethyleneimine copolymer, and can reduce salt ion interference. The material solves the problems of low molecular weight region background interference, non-uniform crystallization, low ionization efficiency, poor salt tolerance and the like during detection of 100-400Da small molecular metabolites in trace samples such as tears and the like by optimizing magnetic responsiveness, photo-thermal conversion capability and salt resistance of an existing matrix; the method realizes high sensitivity and high repeatability (detection), and is suitable for metabonomics analysis of trace biological samples.

This invention relates to the field of thermally insulated aluminum materials, and discloses a thermally insulated aluminum material and its preparation method. The aluminum material consists of a 6061 aluminum substrate and a composite thermally insulated coating layer. The coating layer uses 40-45 parts by weight of bisphenol A type epoxy resin as the matrix, and is formulated with modified silica, coupling agent-modified adamantane, polyethyleneimine-modified hollow glass microspheres, and other modified fillers and additives. The aluminum material is prepared by roughening the substrate through grinding, coating it with the coating, and curing at room temperature for 45-55 minutes. This aluminum material exhibits significantly reduced thermal conductivity, coating adhesion reaching grade 0, excellent aging resistance and water resistance, and a simple preparation process with mild reaction conditions and readily available raw materials. The components work synergistically, making it suitable for industrial mass production and applicable to various thermally insulated aluminum material applications such as construction, automotive, and chemical industries.

The application provides a hyaluronic acid artificial lymph node sustained-release nano DNA vaccine for enhancing cancer prevention effect and a preparation method thereof, and the preparation raw materials comprise a plasmid, 4-(bromomethyl)phenyl boronic acid modified linear polyethylene imine, a cell colony stimulating factor, a sulfhydryl modified hyaluronic acid and a four-arm-maleimide grafted polyethylene glycol. The nano DNA vaccine can recruit a large number of immune cells to form a hyaluronic acid artificial lymph node after subcutaneous administration, and inhibit the generation of tumors by continuously outputting antigen presenting cells and antigen specific T cells. In addition, the hyaluronic acid artificial lymph node can also release the nano DNA vaccine, prolong the vaccine stimulation time, improve the problem of weak immunogenicity of the existing DNA vaccine, and also solve the problem of biocompatibility. The nano DNA vaccine has the advantages of easy preparation, easy storage, low price and the like.

The application discloses a preparation method of nanocellulose / polyethyleneimine / MIL-101(Cr) composite porous material for efficiently capturing dyes and heavy metal ions in wastewater. First, Cr(NO3)3.9H2O is selected as a metal ion source, H2BDC is selected as an organic ligand, and water is selected as a solvent, and MIL-101(Cr) powder without fluorine is prepared through a hydrothermal synthesis method; then, CNF is selected as a green polymer matrix, PEI is selected as a functional reagent, and MIL-101(Cr) nano-filler is simply complexed with a crosslinking agent to prepare a series of new nanocellulose / polyethyleneimine / MIL-101(Cr) aerogels which are uniform and low in density, can efficiently absorb organic dyes and heavy metal ions in wastewater, and have a synergistic effect on simultaneously absorbing dyes and heavy metal ions in a binary system. The raw materials in the application are derived from biomass, have the advantages of biodegradability and good biocompatibility, and have the characteristics of easy availability, simple preparation method, short operation process, recyclability, environmental protection and economy. The application has a good application prospect in wastewater treatment and other industries.

The invention discloses an EVA-based silicone wear-resistant rubber master batch and a preparation method thereof, and belongs to the technical field of high polymer materials. The master batch comprises the following raw materials in parts by weight: 100 parts of EVA resin, 10-20 parts of butadiene rubber, 5-10 parts of oil-extended styrene-butadiene rubber, 20-25 parts of silicone powder, 15-20 parts of wear-resistant carbon black, 5-10 parts of polytetrafluoroethylene micro powder, 1-1.5 parts of polyethyleneimine, 0.5-1 part of a cross-linking agent and 0.5-1 part of an anti-aging agent; when the polyethyleneimine modified silicone powder is used for rubber, the silicone powder and a rubber molecular chain form an interface with wear resistance and elasticity; the polytetrafluoroethylene micro powder and the wear-resistant carbon black are pre-dispersed in the master batch, so that the wear resistance of the rubber is improved; the problems that the rubber is hardened and the elasticity is reduced due to the fact that the wear resistance is improved only by carbon black are solved. The wear-resistant rubber composition is suitable for being added into high-grade wear-resistant rubber products such as high-pressure sealing elements, tread rubber and track system elastic elements.

The application discloses a method for homogenizing a chemical synthetic multi-component alloy, and the method comprises the following steps: dissolving ammonium molybdate and ammonium tungstate in deionized water to obtain a mixed solution of ammonium molybdate and ammonium tungstate; dissolving polyethyleneimine in deionized water to obtain a polyethyleneimine solution; adding the polyethyleneimine solution into the mixed solution of ammonium molybdate and ammonium tungstate to uniformly disperse the precipitate; completely evaporating the solvent by using a rotary evaporation method to obtain a powder; performing secondary reduction on the powder to obtain a reduced powder; sintering the reduced powder in a graphite mold; heating the sintered product to 1500-1600 DEG C by using a medium-frequency induction furnace, extruding the sintered product on a horizontal extruder, naturally cooling the sintered product, and then annealing the sintered product at 1300-1400 DEG C. Compared with solid-state mixing, the method can save a mechanical alloying process and reduce sintering forming power in solidification forming; compared with liquid-phase mixing, the method can improve the uniformity of element mixing; compared with gas-phase mixing, the method can improve material utilization, reduce preparation cost and homogenization difficulty, and has no environmental pollution.

The present invention provides delivery-enhancing polymers capable of being encapsulated in nanoparticles to enhance release of payload from the nanoparticle wherein the delivery-enhancing polymer comprises a polyamine comprising tertiary amine. The delivery-enhancing polymer may comprise methylated polyethylenimine (mPEI), branched PEI (bPEI), PAMAM dendrimer and / or histidine polymer.

The invention discloses a collophanite flotation combined collecting agent and a preparation method and application thereof. The phosphorite flotation combined collecting agent comprises agent components and water with the same mass, and the agent components are composed of, by mass, 40%-85% of mixed amine, 8%-30% of a mixed nonionic foaming agent and 7%-30% of a hydrophobic accelerant; the mixed amine is a mixture of N-dodecyl ethanolamine and alkoxylated polyethyleneimine; the mixed nonionic foaming agent is a mixture of methyl isobutyl carbinol and C5-C9 fatty acid ethyl ester; the hydrophobic accelerant is a mixture of polymethylhydrosiloxane and kerosene. The components of the collecting agent are optimized, the synergistic effect of all the components is exerted, the using amount of the collecting agent in the reverse flotation desilicication process is reduced, the production cost is reduced, and the flotation froth suitability and the flotation effect are improved.

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

This invention discloses a poly(amylated oxime-ethyleneimine) modified foam-like mesoporous silica, its preparation, and its application, belonging to the fields of environmental energy chemistry and new materials technology. Firstly, using Pluronic P123 / mesotriene as a pore-forming / expanding agent and tetraethyl silicate as a raw material, foam-like mesoporous silica is obtained through hydrolysis, aging, high-temperature pore expansion, and calcination. After activation, epoxy-modified foam-like mesoporous silica is obtained through a silanization reaction. Subsequently, polyethyleneimine-modified foam-like mesoporous silica is prepared by reacting amino groups with epoxy groups. Then, it is reacted with acrylonitrile to obtain poly(acrylonitrile-ethyleneimine) modified foam-like mesoporous silica. Finally, it is reacted with NH2OH·HCl to obtain poly(amylated oxime-ethyleneimine) modified foam-like mesoporous silica. The poly(amylated oxime-ethyleneimine) modified foam-like mesoporous silica of this invention exhibits extremely high adsorption capacity and extremely fast adsorption rate for uranyl ions, and demonstrates high affinity, selectivity, and good reusability, making it applicable to large-scale seawater uranium extraction projects.

A treatment article comprising a fiber, a sizing agent, and a retention aid. The sizing agent comprises a wax or component thereof having an acid value of 10 mg to 220 mg KOH / g as measured according to USP 401. The retention aid comprises a nitrogen-containing polymer independently selected from the group consisting of (i) a nitrogen-containing polymer of Formula I, (ii) a polyethyleneimine, (iii) a polyaminoamide, (iv) a copolymer formed from the reaction product of epichlorohydrin and dimethylamine, and (v) combinations thereof.

The invention relates to a rapid deposition method of a silicon carbide alkaline aqueous solution. The rapid deposition method of the silicon carbide alkaline aqueous solution comprises the following steps: adding a polyethyleneimine (PEI) aqueous solution into the silicon carbide alkaline aqueous solution, fully mixing to uniformly disperse PEI in the silicon carbide alkaline aqueous solution, and standing for precipitation.

The application relates to the technical field of solar cells, in particular to a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell provided by the embodiment of the application comprises a buffer layer, the buffer layer is arranged between an electrode structure and a carrier functional layer, and the buffer layer comprises a polyethylene imine derivative. The long-chain structure of the polyethylene imine derivative can physically block high-energy particles in a sputtering process, significantly reduce the physical damage to an organic charge transport layer and a perovskite active layer of an underlying layer, eliminate the negative influence of transparent electrode preparation, improve the transmission and extraction of electrons in the perovskite solar cell, improve the photoelectric conversion efficiency and stability of the perovskite solar cell, and reduce the photoelectric conversion efficiency decay rate.

The invention relates to the technical field of silicon adsorption, in particular to a silicon-containing sodium aluminate solution desiliconizing agent and a preparation method and application thereof. The invention relates to a preparation method of a desiliconizing agent for a silicon-containing sodium aluminate solution. The preparation method comprises the following steps: (1) carrying out crushing, acid pickling, washing and drying on a zeolite raw material to obtain pretreated zeolite; (2) dissolving polyethyleneimine in a solvent to prepare a polyethyleneimine solution; (3) adding the pretreated zeolite into a polyethyleneimine solution to obtain a mixed system; (4) adding a cross-linking agent into the mixed system, and stirring to obtain a reaction solution; and (5) carrying out solid-liquid separation on the reaction liquid, washing the obtained solid to be neutral, and drying to obtain the product. According to the invention, the selective adsorption capacity and deep desiliconization capacity of silicate are remarkably improved by utilizing the strong positive electricity and complexing capacity of PEI and combining the carrier characteristics of zeolite, and meanwhile, the PEI is firm in loading and good in stability in a strong alkaline environment. The efficient and environment-friendly desiliconizing agent provided by the invention effectively reduces the generation of solid wastes and reduces the production cost.

The application discloses a high specific detectivity optical detection device and a preparation method thereof. The detection device is composed of a bottom substrate, a conductive cathode, an electron transport layer, an organic photoactive layer, a hole transport layer and a metal anode. The photoactive layer adopts a polymer donor PDPP3T and a fullerene acceptor PC 71 BM is blended to form a bulk heterojunction, and a solvent additive 1,8-diiodooctane is added to regulate the heterojunction morphology. The electron transport layer uses pure zinc oxide as a single interface layer or ethoxylated polyethyleneimine modified zinc oxide as a composite interface. Under the action of a reasonable additive content, the dark current of the detection device is significantly reduced, and a low dark current and high specific detectivity optical detection device is realized.