1209 results about "Polyethylenimine" patented technology

The invention relates to the technical field of cable materials, and provides a flexible EVA cable sheath material and a preparation method thereof. The cable sheath material is prepared from the following raw materials in parts by weight: 25 to 50 parts of ethylene-vinyl acetate copolymer EVA, 15 to 30 parts of ultra-low density polyethylene, 2 to 10 parts of grafted EVA, 2 to 10 parts of flame retardant, 2 to 10 parts of polydopamine modified montmorillonite-boron nitride fiber composite material, 0.5 to 3 parts of flexibilizer, 0.2 to 1 part of silicone and 0.2 to 1 part of organopolysiloxane. A grafting monomer for grafting EVA comprises maleic anhydride and / or an acrylate compound; the polydopamine modified montmorillonite-boron nitride fiber composite material is prepared from montmorillonite, boron nitride fibers, hydroxylated lignin, dopamine hydrochloride and polyethyleneimine through a reaction. Various functional raw materials are compounded, and the obtained cable sheath has good flexibility, flame retardance, thermal deformation resistance, aging resistance and mechanical performance.

The invention relates to the technical field of polyurethane acrylate, and particularly discloses dual-curing polyurethane acrylate resin and a preparation method thereof. Wherein the dual-curing polyurethane acrylate resin is prepared from the following raw materials: polyester polyol, polyether polyol, diisocyanate, hydroxyl acrylate, a chain extender, a photoinitiator, cardanol glycidyl ether, a polymerization inhibitor and modified nanoparticles. Wherein the citric acid and the polyethyleneimine are adopted to carry out synergistic modification on the nano particles, the dispersion stability of the nano particles is improved, so that the mechanical property of the resin is improved, the cardanol glycidyl ether and the photoinitiator generate a synergistic effect, and the resin can be quickly shaped through photocuring promoted by the photoinitiator; the cardanol glycidyl ether participates in the subsequent thermocuring reaction, so that the curing effect is improved, and the adhesive force between the film layer and the base material is enhanced.

The invention relates to the field of copper-clad plates, and discloses a high-performance flame-retardant low-dielectric-loss copper-clad plate and a preparation method thereof.The copper-clad plate comprises epoxy resin, benzoxazine resin, composite filler, carboxyl-terminated nitrile rubber, an active diluent, a curing agent and the like; the composite filler is prepared by compounding flame-retardant modifier grafted graphene oxide and epoxy silane modified silicon dioxide hollow spheres; according to the flame-retardant modifier, boric acid and pentaerythritol are used for preparing a double-terminal hydroxyl boron-containing intermediate, then dichlorodiphenyl silane and phenylphosphonic dichloride react with hydroxyl groups at the two ends of the intermediate to prepare a flame-retardant intermediate, and amino silane and vanillic aldehyde react with chlorine atoms at the two ends of the intermediate to prepare an aldehyde modified flame-retardant intermediate; the copper-clad plate prepared by the preparation method disclosed by the invention is low in dielectric constant and dielectric loss, high in heat conductivity coefficient and good in flexibility, and also has excellent heat resistance and flame retardance.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The invention discloses a modified thermal insulation coating and a preparation method and application thereof, and belongs to the field of building energy-saving materials. One modified compound is a thermo-sensitive polyelectrolyte layer-by-layer self-assembled alumina microsphere formed by alternately depositing polyethyleneimine and polyacrylic acid through electrostatic interaction, and the polyelectrolyte layer can dynamically swell or shrink along with the temperature to adjust the heat conductivity coefficient; and the other is magnesium silicate nanofiber coated with silicon dioxide and then grafted with fluorosilane, the hydrophobicity is improved by utilizing the low surface energy of the fluorosilane, and meanwhile, the binding force with a polymer interface is enhanced. The coating further comprises fumed silica, a dispersing agent, a defoaming agent and other auxiliaries. The preparation method comprises the following steps: sequentially adding the components into a high-speed dispersion machine, mixing, adjusting the viscosity, filtering and packaging. The coating has the advantages of intelligent temperature-sensitive adjustment, low heat conductivity, strong adhesion and weather resistance; the material is suitable for long-acting heat preservation in the fields of buildings, industrial equipment and cold chains.

The invention relates to a metallized microbubble and a preparation method thereof, a construction method of a multifunctional composite probe, and a rapid bacterium capturing and sterilizing method, and belongs to the technical field of functional material preparation. The method aims at solving the technical problems that in the prior art, a metal coating on the surface of the hollow glass microbubble is not uniform, combination is not firm, and stability is poor. According to the technical scheme, the method is characterized by comprising the following steps: mixing surface-activated hollow glass microbubbles with a polyethyleneimine solution for reaction, and washing and drying to obtain polyethyleneimine-coated hollow glass microbubbles; then reacting with a single-stranded DNA buffer solution to obtain an intermediate product loaded with DNA; then introducing a silver nitrate solution to load silver ions on the surface of the compound; and finally, reducing through a sodium borohydride solution to prepare the metallized microbubbles. The metalized microbubbles prepared by the method can be used for constructing a multifunctional composite probe to realize efficient capture and synergistic antibiosis of targets such as bacteria.

The invention discloses a protein-based adsorbent capable of efficiently adsorbing perfluorinated compounds and application of the protein-based adsorbent. The adsorbent is obtained by coating polyethyleneimine in a phase transition aggregate formed by unfolding protein through a disulfide bond reducing agent. The use method of the adsorbent comprises the step of feeding the adsorbent into a solution containing the perfluorinated compound to realize efficient adsorption of the perfluorinated compound. The adsorbent has the advantages of being low in cost, efficient, easy to operate, environmentally friendly, free of secondary pollution, good in biocompatibility and the like, efficient selective adsorption of perfluorinated compounds can be achieved through the adsorbent, the adsorbent can be repeatedly used, and industrial application and popularization are easy.

The invention discloses a high-strength water-resistant starch adhesive and a preparation method thereof, and belongs to the technical field of preparation of environment-friendly adhesives. The problems of strength and mildew resistance of the starch adhesive are solved. The preparation method comprises the following steps: preparing 5-10g of polyethyleneimine into a 30-60wt% solution, weighing a certain mass of urea according to a molar ratio of (1-5): 1, adding the weighed urea into the prepared polyethyleneimine solution, and reacting for 8-14 hours in an oil bath to obtain a first branched polymer; 20-50 g of dialdehyde starch and 60-90 g of polyvinyl alcohol are added into a flask to prepare a starch solution, then the reaction temperature is set, uniform stirring is performed for gelatinization treatment, a second gelatinized solution is obtained, and after mixing reaction, a prefabricated high-strength water-resistant starch adhesive is obtained; and adding 5-10 g of cassava starch filler and 5-10 g of polymethyl silicon polyphenyl isocyanate, and stirring for 10-30 minutes to obtain the high-strength water-resistant starch adhesive.

The invention belongs to the technical field of gene engineering, and discloses a CRISPR / Cas9 delivery system and application thereof. The CRISPR / Cas9 delivery system is obtained by loading the CRISPR / Cas9 system with the fluorinated polyethyleneimine, and the fluorinated polyethyleneimine can deliver the CRISPR / Cas9 carrier into cells, has excellent transmembrane delivery efficiency, and can efficiently mediate the CRISPR / Cas9 system to enter target cells. The CRISPR / Cas9 delivery system is applied to large-scale breeding of aquatic animals, the use safety is high, the biocompatibility is excellent, and the delivery system has excellent gene editing efficiency and has wide application prospects in the field of gene editing breeding.

The invention belongs to the technical field of membrane separation, and particularly relates to a method for preparing a high-flux hollow fiber nanofiltration membrane based on interfacial polymerization, the obtained membrane and application. The method comprises the following steps: firstly, carrying out pre-adsorption treatment on a polyethersulfone hollow fiber ultrafiltration base membrane through a polyethyleneimine aqueous solution to form a reactive anchoring layer; then sequentially dipping in an aqueous phase solution containing piperazine, sodium phytate and nanoscale cellulose whiskers and an organic phase solution containing trimesoyl chloride and 5-isocyanate isopeptide acyl chloride for interfacial polymerization; and finally, carrying out heat treatment on the obtained primary composite membrane, and completing a gas-phase cross-linking reaction in a glutaraldehyde steam atmosphere. According to the method, the hollow fiber nanofiltration membrane with high flux, high selectivity, excellent chlorine resistance and pollution resistance is successfully prepared through a multi-stage strengthening process, and the hollow fiber nanofiltration membrane is suitable for the fields of drinking water purification, industrial wastewater reuse, material separation and the like.

The invention discloses a preparation method of a solvent-resistant nanofiltration membrane and the solvent-resistant nanofiltration membrane. The preparation method comprises the following steps: infiltrating a polyethylene-based membrane; performing hydrophilic modification treatment on the infiltrated polyethylene base membrane by using a hydrophilic modification solution to obtain a precursor base membrane; preparing a water phase solution containing UiO-66, and preparing an oil phase solution containing polyfunctional aromatic acyl chloride; performing interfacial polymerization reaction on the surface of the precursor base membrane by using the water-phase solution and the oil-phase solution to obtain a polyethylene nanofiltration membrane; performing cross-linking treatment on the polyethylene nanofiltration membrane by using a cross-linking solution to obtain the solvent-resistant nanofiltration membrane, wherein the solute of the hydrophilic modification solution comprises dopamine and polyethyleneimine. Hydrophilic modification treatment of dopamine and polyethyleneimine is carried out on the polyethylene film, and UiO-66 nanoparticles are added into a water-phase solution, so that the flux and the interception performance of the film are remarkably improved.

The invention relates to the technical field of biological separation materials, and discloses an amine-functionalized magnetic nano composite material and application thereof in protein separation and purification. The material has a core-shell structure and comprises a magnetic ferroferric oxide nano core, an ordered mesoporous silicon dioxide intermediate layer and a covalent grafted polyethyleneimine functional layer. By controlling the matching relationship between the pore diameter of mesopores and the molecular size of the polymer and adopting a crosslinking strategy, the material has high magnetic responsiveness, rapid mass transfer performance and high-density surface amino groups. The material shows high adsorption capacity, rapid adsorption kinetics and good cycle stability in the protein separation process, and is suitable for enrichment purification and metal chelating affinity separation of protein in a biological sample. According to the invention, the technical problems of low protein adsorption capacity, slow dynamics and poor cycling stability caused by compact shell layer, non-uniform amino distribution and limited mass transfer of the existing amine functionalized magnetic material are solved.

The invention discloses application of sulfur quantum dot nanoparticles to improvement of plant waterlogging resistance. The invention provides sulfur quantum dot nanoparticles PEI-SQDs prepared from sulfur, sodium hydroxide, polyethylene glycol and polyethyleneimine. The sulfur quantum dot nanoparticles PEI-SQDs are simple in synthesis method, small in particle size, low in toxicity, low in price, simple to prepare, suitable for large-scale production, good in water solubility and good in biocompatibility; the compound has the capacity of removing active oxygen and ethylene in vitro, and can remove excessive active oxygen and ethylene in plants with waterlogging stress, relieve short-term waterlogging stress suffered by crops and recover growth and development of the crops when being applied to the plants with waterlogging stress; further, long-term waterflooding stress on the crops can be relieved, and the yield of the crops is increased; and the sulfur quantum dot nanoparticles are simple and convenient in use method and obvious in action effect.

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a silicon dioxide-based adsorbing material as well as a preparation method and application thereof. The silica-based adsorption material provided by the invention comprises a matrix and polyethyleneimine loaded in the matrix, the matrix comprises silicon dioxide; the structure of the silicon dioxide-based adsorption material is a honeycomb cylindrical body; the silica-based adsorption material has a uniformly distributed pore structure, and the pore volume of the silica-based adsorption material is 0.08-0.36 cm < 3 > / g. The silica-based adsorption material provided by the invention has relatively large pore volume and relatively high amine loading capacity, and is beneficial to adsorption of carbon dioxide; meanwhile, the honeycomb structure is adopted, air can be guided to uniformly flow along the channels, pressure drop is reduced, the contact area with the air is increased, and adsorption of carbon dioxide is facilitated. The mechanical strength of the silicon dioxide-based adsorption material is improved by the uniformly distributed pore structure, and the industrial requirements can be met.

The invention discloses a preparation method of a photo-thermal super-hydrophobic material and a continuous recovery device and method for high-viscosity spilled oil on a water surface, and belongs to the technical field of spilled oil adsorption. The preparation method of the photo-thermal super-hydrophobic material comprises the following steps: selecting a waste textile fabric with compression-recovery performance as a raw material, firstly putting the waste textile fabric in an ethanol solution for ultrasonic treatment, then soaking the waste textile fabric in an aqueous solution containing Tris-HCl and dopamine hydrochloride, and oscillating at a constant temperature; the preparation method comprises the following steps of: soaking in a pyrrole aqueous solution, adding anhydrous FeCl3, oscillating at room temperature, and soaking in an aqueous solution containing Tris-HCl, dopamine hydrochloride and polyethyleneimine after pyrrole is completely polymerized; and finally, soaking in an ethyl acetate solution containing polydimethylsiloxane and a curing agent, and heating and curing after soaking to obtain the photo-thermal super-hydrophobic material. The material not only realizes efficient cyclic utilization of textile wastes, but also has excellent photo-thermal performance and compressible recovery performance under a high-viscosity-wet condition.

The invention provides a pavement coating material with tail gas degradation and CO2 adsorption capacities and a preparation method thereof. Epoxy resin is used as a matrix, polyethyleneimine is loaded on fumed silica through an impregnation method to form a CO2 adsorbent, nano titanium dioxide and a long afterglow material are compounded to realize photocatalytic degradation of tail gas pollutants at the same time, the coating curing time is optimized by controlling the addition amount of polyethyleneimine, and the water resistance is ensured; the catalytic activity in a dark environment is maintained through the long afterglow material, and the coating can degrade NOx, CH and CO and adsorb CO2 under weak light and strong light. By balancing the proportion of adsorption and photocatalysis components, the limitation that a traditional material is single in function, high in light dependence and the like is broken through, efficient tail gas purification and CO2 adsorption are still maintained under the dim light / dark condition, the material is suitable for changeable scenes such as the urban road peak period, and a comprehensive solution is provided for road area pollution treatment and carbon neutralization targets.

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 an ultrasonic activation type piezoelectric gel dressing and a preparation method and application thereof.The surface of a system is an antibacterial hydrogel layer, the antibacterial hydrogel layer is composed of polyethyleneimine (PEI) and polyvinyl alcohol (PVA) cross-linked hydrogel, and ultrasound and current can be transmitted to a deep area; bT-dNO piezoelectric nanoparticles are packaged inside, and BT-dNO is prepared by coating a nitric oxide (NO) donor on the surface of piezoelectric barium titanate (BT) subjected to hydroxylation and dopamine modification. Under the stimulation of low intensity focused ultrasound (LIFU), the donor can release NO as required, and the BT nanoparticles can generate reactive oxygen species (ROS) and output piezoelectric current. The dressing system has an effective combined repair effect, excellent biocompatibility and good anti-inflammatory ability.

The invention discloses an activated carbon-based fluorine removal agent and a preparation method thereof, and relates to the technical field of water treatment. The activated carbon-based fluorine removal agent comprises the following raw material components in parts by mass: 50-70 parts of activated carbon, 10-20 parts of nano aluminum hydroxide, 5-15 parts of chitosan, 3-8 parts of calcium chloride, 2-8 parts of polyvinyl alcohol, 3-5 parts of sodium carboxymethyl cellulose and 6-12 parts of polyethyleneimine. According to the invention, the active carbon, the nano aluminum hydroxide, the chitosan, the calcium chloride and other materials are subjected to composite modification, so that the adsorption performance of the fluorine removal agent on fluorine ions is greatly improved, and the prepared fluorine removal agent has the characteristics of rapid adsorption and high adsorption capacity, and also has excellent cycle stability and long-term storage stability. The preparation process is simple, the cost is low, the obvious environmental protection advantage is achieved, the novel activated carbon-based fluorine removal agent has wide application prospects in the fields of drinking water treatment, industrial wastewater treatment and the like, and an efficient solution is provided for high-fluorine water treatment.

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 modified microfiltration membrane for enriching biological particles and a preparation method and application thereof, and belongs to the technical field of biological separation.The preparation method of the modified microfiltration membrane comprises the following steps that a mixed cellulose ester microfiltration membrane is provided and subjected to alkali liquor activating treatment; placing the activated membrane in a weakly alkaline buffer solution for balancing; the preparation method comprises the following steps: in a weakly alkaline buffer solution, firstly contacting the surface of the membrane with a tannic acid solution to carry out a first reaction, and then directly adding a polyethyleneimine solution to carry out a second reaction under the condition of not replacing a system, so as to form a phenol-amine cross-linked network on the surface of the membrane in situ; sodium cyanoborohydride is continuously added for reduction stabilization treatment, and the modified microporous filter membrane is obtained. The modified microporous filter membrane prepared by modifying the microporous filter membrane with tannic acid and polyethyleneimine can realize one-step synchronous enrichment of all negatively charged targets, and the problems of target loss, efficiency loss and the like caused by a multi-step process are avoided from the source.

The present disclosure discloses a medical hydrogel, formed by in-situ crosslinking an aldehyde-terminated multi-arm star polyethylene glycol and a polyamino compound, wherein the aldehyde group and the multi-arm star polyethylene glycol are linked by a chemical bond such as an ether bond, an amide bond, an ester bond, a urethane bond, an imine bond, or a urea bond, and the molar ratio of the amino in the polyamino compound to the aldehyde group in the aldehyde-terminated multi-arm star polyethylene glycol is 0.4-4.4:1. The polyamino compound is polylysine or a mixture of polylysine and polyethylenimine in a molar ratio of 2-30:3. The hydrogel of the present disclosure gels rapidly, has a long-term stability in an aqueous solution, and still has good swelling property and stability after a plurality of radiations, and thus can be used as a medical radiotherapy protection spacer for radiation protection.

The invention belongs to the technical field of temporary plugging agents, and relates to a medium-temperature drilling fluid nano temporary plugging agent and a preparation method thereof. The temporary plugging agent is prepared from the following raw materials in parts by mass: 10 to 15 parts of small-particle-size coated silicon dioxide, 15 to 20 parts of medium-particle-size coated silicon dioxide, 30 to 50 parts of large-particle-size coated silicon dioxide, 15 to 20 parts of fiber, 5 to 8 parts of polyether diglycidyl ether, 5 to 8 parts of hyperbranched polyethyleneimine, 1 to 1.5 parts of water-soluble cellulose and 0.5 to 1 part of cationic quaternary ammonium salt. The coated silicon dioxide takes chitosan and glutaraldehyde as wall raw materials and silicon dioxide as a core material, and the particle size of the small-particle-size core material is 0.3-1 mu m; the particle size of the medium-particle-size particle core material is 150-250 microns; the particle size of the large-particle-size particle core material is 250-350 microns, the coated silicon dioxide particles are bonded together through a microscopic interpenetrating network formed by the reaction of hyperbranched polyethyleneimine and polyether diglycidyl ether, and the particles are matched with fibers to improve the bearing strength.

The invention provides an aerogel film with a continuous gradient pore structure and a preparation method and application thereof.The preparation method comprises the steps that a pre-crosslinking solution containing a polymer nanofiber suspension, a sodium alginate solution, a polyethyleneimine aqueous solution and a crosslinking agent is sprayed to a temperature-conducting substrate with the initial temperature ranging from-20 DEG C to-15 DEG C at high pressure; and freeze-drying to obtain the aerogel film with the continuous gradient pore structure. The aperture of the aerogel film is gradually increased from bottom to top, and the range of the aperture is mainly 1-110 [mu] m. The aerogel film is placed in a filter membrane clamp, so that a solution to be filtered passes through the aerogel film according to the sequence of'macropore-mesopore-micropore ', the aerogel film is used for intercepting and recycling particles with different sizes, such as micro-plastics, and high water flux and high rejection rate are both considered. The pore size of the aerogel film can be changed by adjusting the temperature of the temperature-conducting substrate; the prepared aerogel film improves the trade-off effect in the existing filtration separation technology, and has a wide market prospect.

The invention discloses a low-foam acidic zinc plating additive and a preparation process thereof, and belongs to the technical field of electroplating additives, the additive comprises a low-foam softening agent and a water-based brightener, and the low-foam softening agent comprises the following raw materials in percentage by mass: 0.8-1.2% of polyethyleneimine, 0.03-0.06% of monododecyl phosphate potassium, 0.2-0.6% of water-soluble polyether amine and the balance of water. The water-based brightener is prepared from the following raw materials: 0.6 to 1.2 percent of 5-hydroxymethylfurfural, 0.2 to 0.4 percent of L-cysteine salt, 0.1 to 0.15 percent of 4-amino-2 (1H) pyrimidone, 0.05 to 0.1 percent of sodium salicylate, 1 to 1.5 percent of citric acid, 0.3 to 0.5 percent of alpha-ketoglutaric acid, 0.2 to 0.4 percent of erythorbic acid and the balance of water. The water-based formula is prepared by optimizing the components in the additive, the components are uniformly dispersed, the foam amount is low, and the plating quality is good.

The invention discloses a method for preparing a sandwich type composite membrane capable of efficiently adsorbing heavy metal ions, and belongs to the field of water pollution treatment. The preparation method comprises the following steps: firstly, carrying out hydrolysis modification on polylactic acid particles, then dissolving the polylactic acid particles in dichloromethane / N, N-dimethylformamide to prepare an outer-layer spinning solution, and meanwhile, mixing polyvinyl alcohol, sodium alginate and polyethyleneimine to prepare an inner-layer spinning solution; performing electrostatic spinning on the outer-layer spinning solution to obtain an outer-layer film named as an outer-layer PLA film, performing electrostatic spinning on the inner-layer spinning solution to obtain an inner-layer film named as an inner-layer PVA / SA / PEI film, and re-spinning the outer-layer PLA film on the other side of the inner-layer PVA / SA / PEI film by using the outer-layer spinning solution, namely wrapping the inner-layer PVA / SA / PEI film with the two outer-layer PLA films to form a sandwich structure; and finally, obtaining the composite membrane by adopting a calcium ion cross-linking process. The composite membrane can efficiently adsorb metal ions, is high in adsorption performance retention rate and good in strong acid stability, and is suitable for selective iron removal of electroplating wastewater.

The invention relates to the technical field of high polymer materials, and discloses a double quaternized QPVBC / QBPEI anion exchange membrane and a preparation method and application thereof.The preparation method comprises the steps that 4-vinyl benzyl chloride, an azo initiator and a free radical polymerization reaction solvent are subjected to free radical polymerization, then quenching, sedimentation and drying are conducted, and poly 4-vinyl benzyl chloride is obtained; the preparation method comprises the following steps: carrying out quaternization on poly (4-vinylbenzyl chloride), a first quaternization reagent and a first organic solvent, and then curing to obtain quaternized poly (4-vinylbenzyl chloride); carrying out condensation reflux on the branched polyethyleneimine, a second quaternization reagent and a second organic solvent, and then carrying out rotary evaporation and drying to obtain quaternized branched polyethyleneimine; and carrying out stirring and cross-linking reaction on the quaternized poly (4-vinyl benzyl chloride), the quaternized branched polyethyleneimine and a third organic solvent to obtain the double quaternized QPVBC / QBPEI anion exchange membrane. The double quaternized QPVBC / QBPEI anion exchange membrane disclosed by the invention has excellent anion transmission capacity and has potential application value in the field of fuel cells.

The invention provides a preparation method and application of a matcha-based carbon quantum dot green corrosion inhibitor. The novel environment-friendly carbon quantum dot is successfully synthesized by taking matcha powder and polyethyleneimine as precursors and adopting a hydrothermal method, and low-dose and high-effect carbon steel anti-corrosion protection can be remarkably realized by introducing a nitrogen-containing functional group (such as amino) on the surface of a matcha molecule containing hydroxyl and carboxyl. The matcha-based carbon quantum dot is used for a carbon steel corrosion inhibitor, self-corrosion of carbon steel in an acid medium can be inhibited, the corrosion resistance is improved, the higher requirement of the green chemistry concept on corrosion inhibitor development is met, and the problem that an existing carbon quantum dot corrosion inhibitor is not ideal in corrosion inhibition performance is solved.

The invention relates to the technical field of nano-agent preparation, in particular to a nano-agent capable of promoting germination and resisting viruses, which comprises the following raw materials in percentage by weight: 0.0005-0.1% of carboxyl modified nano-selenium particles with the particle size of 10-100 nm, 0.0005-0.1% of nano-selenium powder with the particle size of 10-100 nm, and the balance of water. The content of the polyethyleneimine modified nano silver particles is 0.0001%-0.05%, and the particle size of the polyethyleneimine modified nano silver particles 0.01%-5% of a stabilizing agent, wherein the stabilizing agent is one or more of polyvinylpyrrolidone (PVP), trehalose or sodium citrate; 0.1%-5% of a pH regulator, wherein the pH regulator is a phosphate buffer solution; 1%-5% of a freeze-drying protective agent, wherein the freeze-drying protective agent is mannitol; and the balance of deionized water. Compared with nano-selenium and nano-silver, the nano-agent capable of promoting germination and resisting viruses and the preparation method of the nano-agent have the advantages that the effect of reducing the ToBRFV content and PSTVd content of tomato and pepper seeds can be better, the effect of promoting growth of tomato and pepper plants can be achieved, and growth of stems and roots can be promoted.